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Human DNA Polymerase Gamma Mutation Database

All Mutations

All inquiries, additions to the list, and comments should be made to Bill Copeland.

Use the drop down box to select a mutation that you want to view more information about.


Amino Acid Substitution Mutation Name Disease Genetics Frequency Reference
R3P 8 g→c (exon 2) PEO ar (Van Goethem et al., 2001) reported 0 out of 229 control Individuals (<0.4%) (Van Goethem et al., 2001)
G11D 32 g→a (exon 2) Ataxia Neuropathy



Alpers



Alpers
Found in cis with R627Q and in trans with R852C, and also found as a Heterozygous mutation with a failure to thrive

Found in cis w/R852C and in trans w/W748S. In a second pt. found in cis w/R852C and in trans w/A467T.

Found in cis w/R852C and in trans w/ A467T. In a 2nd pt., found in cis w/ R852C and in trans w/W748S and E1143G.
(Wong et al., 2008)



(Ashley et al., 2008)


(Stewart et al., 2008)
P18S 52 t→g (exon 2) Neutral polymorphism 0.6% of 450 individuals (GeneSNPs, 2004)
±Glu at aa 43-55 ±(CAG)n at nucleotides 126 to 162 (exon 2) Male infertility, testicular cancer



Idiopathic sporadic Parkinson
Deletion / Addition of trinucleotide unit. Although initial reports implicated deletion or addition of a trinucleotide unit in male infertility several recent reports refute this notion.



Increase frequency of non-10/11 (CAG) variant in Parkinson disease (PD)
Rovio et al., 2001 reported 88% of both Finnish and ethnically mixed populations carry the predominant allel of 10 CAG repeats. Nowak et al., 2005 reported 11% healthy Polish men (n=55) were heterozygous, and 26% of testicular cancer patients (n=49) were heterozygous for the CAG repeats ≠10. With no clinical differences in tumor pathology.


Luoma, 2007: found in 10% PD patients compared with 3.5-4.3% spouse/population controls.
(Rovio et al., 2001)
(Jensen et al., 2004; Ropp and Copeland, 1996)
(Aknin-Seifer et al., 2005; Brusco et al., 2006; Harris et al., 2006; Krausz et al., 2004; Malyarchuk et al., 2005; Nowak et al., 2005)





(Luoma et al., 2007)
Q43R 128 a→g Idiopathic sporadic Parkinson (Luoma et al., 2007)
Q49E 145 c→g Neutral polymorphism <1 % in control populations (Luoma et al., 2007)
S64L 191 c→t Neutral polymorphism Found in cis with R232H in ar Charcot-Marie-Tooth 30.6% of control population (90/294 control alleles) (Harrower et al, 2008)
Q68X 202 c→t (exon 2) Alpers Found in trans w/ A467T (Wong et al., 2008)
L83P 248 t→c (exon 2) Alpers Compound heterozygous with G888S in 10 yr old (Bao et al., 2007) (Wong et al., 2008)
G888S 2662 g→a (exon 17) Alpers Compound heterozygous with L83P in 10 yr old (Bao et al., 2007)
(Wong et al., 2008)
H110Y 328 c→t (exon 2) Heterozygous, hypotonia, failure to thrive, short stature, respiratory failure (Wong et al., 2008)
A143V 427 g→c (exon 2) Alpers Sarzi et al. 2007 reported 2% (n=50) of patients with multiple respiratory chain deficiency with a 35% decrease of mtDNA (Sarzi et al. 2007)
R193Q 578 g→a (exon 2) Neutral polymorphism 0.6% of 450 individuals (GeneSNPs, 2004)
C224Y 671 g→a (exon 3) Alpers Sarzi et al. 2007 reported 2% (n=50) of patients with multiple respiratory chain deficiency with a 35% decrease of mtDNA (Sarzi et al. 2007)
R227W 679 c→t (exon 3) PEO
Alpers, Severe childhood multi-system disorder
Sporadic / unknown. Found as compund with T251I. Also found as compound w/ S1176L In Alpers found as compound with A467T. In severe childhood multi-system disorder found as compound with D1184N Augostino et al. reported 1 out of 27 (3.7%)patients w/ sporadic PEO.
De Vries et al., 2006 identified 3 (14.28%) children out of 21 that were known to have a mitochondrial disorder
(Agostino et al., 2003) (de Vries et al., 2006; Lamantea and Zeviani, 2004)
R227P 680 g→c (exon 3) Severe childhood multi-system disorder Compound heterozygous with A467T De Vries et al. , 2006 identified 1 (4.76%) child out of 21 that were known to have a mitochondrial disorder (de Vries et al., 2006)
R232G 694 c→g (exon 3) Infantile hepatocerebral






Alpers
Found as compound with T251I and P587L






Found in trans w/ [T251I and P587L]
Ferrari et al., 2005 reported 1 in 9 (11.11%) children with a combination of progressive neurological and hepatic failure, with an allelic frequency of <0.14% (0 out of 350) in the control group. (Ferrari et al., 2005)







(Ashley et al., 2008)
R232H 695 g→a (exon 3) Alpers



Charcot-Marie Tooth disease, (CMT) (profound cerebellar ataxia)
Found as compound in trans with W748S - E1143G


Found in cis with the S64L SNP and in trans with G737R
Not found in 200 control alleles



Not detected in 282 control alleles
(Kollberg et al., 2006)



(Harrower et al, 2008)
W235stop 705 g→a (exon 3) Severe childhood multi-system disorder Found as compound heterozygote with A467T (de Vries et al., 2006)
P241L 722 c→t Neutral polymorphism <1 % in control populations (Luoma et al., 2007)
L244P 731 t→c (exon 3) Alpers Found as compound with W748S Ferrari et al., 2005 reported 1 in 9 (11.11%) children with a combination of progressive neurological and hepatic failure, with an allelic frequency of <0.14% (0 out of 350) in the control group (Ferrari et al., 2005)
T251I 752 c→t (exon 3) PEO
Infantile hepatocerebral syndrome








Alpers






PEO
ar in PEO, Found as compound with R309L, or 2354G insertion, or G848S in PEO.
Frequently found in cis with P587L and compound in trans with N864S, R807P, H932Y, V1106I, or R709stop. Found as compound with R227W
In Infantile hepatocerebral found in cis with P587L and compound with R232G


Found in trans w/ G848S and in cis w/ P587L. Also found in cis w/P587L and in trans w/R853Q in myocerebrohepato-pathy patient. Also found as a hetero. Mutation with ataxia, ptosis, and neuropathy. Found in trans w/ R232G and cis w/ P587L.

Found in cis w/ P587L, with both mutations on each allel. A 2nd pt found to have P587L in trans and A467T in cis.
Ferrari et al., 2005 reported 1 in 9 (11.11%) children with a combination of progressive neurological and hepatic failure, with a heterozygous frequency of 1% of Italian controls.

Horvath et al., 2006 reported a 1.11% (5 out of 450) allelic frequency in Italian controls and always with P587L Van Goethem, 2003: Not found in 280 control chromosomes
(Lamantea et al., 2002)
(Agostino et al., 2003; Di Fonzo et al., 2003; Lamantea and Zeviani, 2004; Van Goethem et al., 2003c)
(Ferrari et al., 2005; Gonzalez - Vioque et al., 2006)
(Horvath et al., 2006; Kollberg et al., 2005)


(Wong et al., 2008)

(Ashley et al., 2008)




(Stewart et al., 2008)
G268A 803 g→c (exon 3) PEO Sporadic / unknown
Found as compound in trans with A467T
Di Fonzo 2003: Not found in 100 DNA samples from healthy Italians
Gonzalez - Vioque 2006: Not detected in 100 control subjects
(Del Bo et al., 2003)
(Baruffini et al., 2006; Di Fonzo et al., 2003; Gonzalez - Vioque et al., 2006)
H277C 829,830 ca→tg (exon 3) Alpers Found in trans w/T851A (Ashley et al., 2008)
L304R 911 t→g (exon 4) PEO
Ataxia - neuropathy




Alpers
ar
Compound in trans with A467T
Found as homozygous or compound in trans with W748S - E1143G in SCAE, ataxi-neuropathy

Found homozygous in one pt.
(Van Goethem et al., 2001) reported 0 out of 229 control Individuals (<0.4%) (Naimi et al., 2006; Stuart et al., 2006; Van Goethem et al., 2001)



(Ashley et al., 2008)
S305R 915 c→g (exon 4) Alpers? heterozygous (Wong et al., 2008)
Q308H 924 g→c (exon 4) PEO ar Compound with T914P-F1164I Horvath et al., 2006 reported 0 out of 200 (0%) allelic frequency in Italian controls (Horvath et al., 2006)
R309L 926 g→t (exon 4) PEO ar
Compound with T251I
Not found in 100 DNA samples (Lamantea et al., 2002)
R309H 926 g→a (exon 4) Alpers Compound in trans with R627Q Horvath et al., 2006 reported 10% (1 out of 10) patients with encephalopathy and liver failure (Horvath et al., 2006)
W312R 934 t→c (exon 4) PEO +/-
dysphagia/myopathy
Sporadic or ar
Found in trans with R574W.
Not found in 250 control individuals (Agostino et al., 2003)
(Horvath et al., 2006)
P324S 970 t→g (exon 4) Neutral polymorphism 0.6% of 450 individuals (GeneSNPs, 2004)
T326fsX387 975-976 ins c (exon 4) Alpers Found in trans with A467T (Naimi et al., 2006)
W347_L356 del 1039-1068 del (exon 5) Alpers 10 amino acid del found in trans w/A467T (Ashley et al., 2008)
R374X 1120 c→t (STOP) (exon 5) Alpers Found in trans w/A467T. (Ashley et al., 2008)
G380D 1139 g→a (exon 5) PEO Sporadic mutation found in trans with A467T Not found in 300 healthy French control chromosomes (Naimi et al., 2006)
L392V 1174 c→g Neutral polymorphism


Heterozygous with muscle weakness & optic atrophy
<1 % in control populations (Luoma et al., 2007)


(Wong et al., 2008)
R417T 1250 g→c (exon 6&7 junction) Alpers Found in trans w/A467T (Ashley et al., 2008)
C418R 1252 t→c Alpers? Found in trans w/A467T. (Ashley et al., 2008)
L424GfsX28 (CT)deletion - 452stop 1270-1271 del ct (exon 7) PEO


Alpers
Sporadic / unknown Compound with G431V

Found in trans with A467T
Not found in a control series of 250 individuals (Agostino et al., 2003)


(Wong et al., 2008)
L428P 1283 t→c (exon 7) Alpers Sarzi et al. 2007 reported 2% (n=50) of patients with multiple respiratory chain deficiency with a 35% decrease of mtDNA were found with the mutation L428P. 19% (9 out of 50) had various mutations in POLG. (Sarzi et al. 2007)
M430L 1279 a→t (exon 7) PEO with Parkinsonism ar, Compound (in trans) heterozygous with W918R Absent in 200 control alleles (Invernizzi et al., 2008)
G431V 1292 g→t (exon 7) PEO Sporadic / unknown
Compound with L424 CT deletion
Not found in a control series of 250 individuals (Agostino et al., 2003)
S433C 1298 c→g (exon 7) PEO- ataxia, peripheral neuropathy Sporadic, Found in trans with E1143G Hudson, 2006: Not detected in 200 controls (Hudson et al., 2006a)
(Horvath et al., 2006)
T452stop 1356 t→g (exon 7) PEO Sporadic Not detected in 200 controls. (Hudson et al., 2006a)
L463F 1389 g→t (exon 7) PEO ar, Found as compound in trans with S511N None found in 192 ethnically matched control chromosomes nor in 108 patients with PEO and 140 cases of sporadic PD (Hudson et al., 2006b)
A467T 1399 g→a (exon 7) PEO, SANDO, MERRF, Ataia-Neuropathy, ataxia - myopathy, Alpers, severe childhood multi-system disorder



























Alpers w/ valporate induced hepatic failure

Alpers, Ataxia Neuropathy, and arPEO+



Alpers









Alpers, PEO
Most commonly found disease mutation in POLG and appears to be recessive, this mutation disrupts subunit interaction and lowers DNA binding and catalytic efficiency of polymerase.
ar in PEO, Found as compound with L304R or R3P, or G268A in PEO. Found as compound with R627W in SANDO. Found as compound with S1104C.
Found in compound het with E873stop or as compound het with W1020stop in Alpers. Found as a homozygous mutation in Alpers and ataxia.
Found as compound in trans with R627Q, Q1236H, and W748S - E1143G in ataxia - neuropathy.
Found as compound in trans in Alpers with R574W, G848S, A957P, E1143G + W748S, or 3482+2T to C. Found as homozygous mutation in PEO patient with ptosis and sensorimotor neuropathy. In severe childhood multi-system disorder this mutation found as homozygous or compound with R227W, G848S, A957P, W235stop, or R227P

Found in cis w/T885s and in trans w/Q879H and E1143G.

Found in trans w/ L886P, Q68X, Q715X, T849H, T914P, L83P, G888S, R1138C, c.2480+1, c. 2157+5, G737R, and L424G

Found in trans w/ [R852C and G11D], and, found in trans w/ T914P in 2 additional pts. In trans w/E873X. In trans w/ W347_L356 del. In trans w/G848S. In trans w/L966R. In trans w/R374X. In trans w/ R417T. In trans w/C418R. One pt, found as a homozygous mutation.

Found in trans w/L605R, and in a 2nd pt in trans w/ W748S. Also, found as a homozygous mutation. Found in trans w/ T251I and P587L. Also found in trans w/ G11D and R852C. Also found in trans w/G848S.

Van Goethem, 2003: 0.6% in Belgium population, 0.69% in British population, and 1% in Norway population (Van Goethem et al., 2001)
(Agostino et al., 2003; Chan et al., 2005a; Chan et al., 2005b; Di Fonzo et al., 2003; Ferrari et al., 2005; Naviaux and Nguyen, 2004; Naviaux and Nguyen, 2005; Van Goethem et al., 2004; Van Goethem et al., 2003a; Van Goethem et al., 2003b)
(Gonzalez - Vioque et al., 2006; Luoma et al., 2005; Nguyen et al., 2005; Stuart et al., 2006; Winterthun et al., 2005)
(Horvath et al., 2006)
( Kollberg et al., 2006; Naimi et al., 2006; Tzoulis et al., 2006)








(McFarland et al., 2008)


(Wong et al., 2008)




(Ashley et al, 2008)








(Stewart et al., 2008)
N468D 1402 a→g (exon 7) PEO ar Luoma, 2004: None noted in screening of 1640 healthy Finnish control chromosomes. (Luoma et al., 2004; Wanrooij et al., 2004)
Q497H 1491 g→c (exon 8) ataxia - neuropathy


Alpers, Ataxia Neuropathy
Found allelic (cis) with W748S + E1143G

In cis with G848S and in trans with W748S-E1143G. also found in trans w/ A467T.
1 in 97 found in healthy controls and 1 in 99 found mtDNA disease patients (Winterthun et al., 2005)


(Wong et al., 2008)
S511N 1532 g→a (exon 8) PEO ad None found in 192 ethnically matched control chromosomes nor in 108 patients with PEO and 140 cases of sporadic PD (Hudson et al., 2006b)
G517V 1550 g→t (exon 7) ataxia - neuropathy



Myopathy and micro-cephaly

adPEO
ad



Found in trans w/ D1196N and R1128H

Heterozygous, short-stature, Leigh-like disease, neuropathy, stroke, dystonia, chorea, diabetes, myoclonus, Sideroblastic anemia, splenmegaly, Pearson Syndrome to KSS
Horvath et al., 2006 reported 1 out of 672 allelic frequency in German controls (Horvath et al., 2006)



(Wong et al., 2008)



(Wong et al., 2008)
R546C 1636 c→t (exon 9) Neutral polymorphism 1% 1.1% of 450 individuals (GeneSNPs, 2004)
K561M 1882 a→t (exon 9) Dysmorphy, hypotonia, coloboma, heart failure, and liver insufficiency Compound heterozygosity in cis with W748S Sarzi et al. 2007 reported 2% (n=50) of patients with multiple respiratory chain deficiency with a 35% decrease of mtDNA were found with the mutation K561M in cis with W748S. (Sarzi et al., 2007)
R562Q 1685 g→a (exon 9) PEO sporadic Not found in 100 DNA samples from healthy Italians (Di Fonzo et al., 2003)
H569Q 1707 c→(a or g) (exon 9) ? Homozygous (Ashley et al., 2008)
R574W 1720 c→t (exon 10) PEO + myopathy / dysphagia
Alpers
ar, Compound in trans with W312R in PEO or in trans with A467T in Alpers Horvath et al., 2006 reported 0 out of 200 (0%) allelic frequency in Italian controls Kollberg, 2006: Not found in 200 control alleles (Horvath et al., 2006; Kollberg et al., 2006)
R579W 1735 c→t (exon 10) PEO Sporadic / unknown
Compound with A889T
Not detected in 120 healthy control alleles (Filosto et al., 2003)
P587L 1760 c→t (exon 10) PEO
Infantile hepatocerebral









Alpers





Alpers
ar PEO Found in cis with T251I and compound with N864S, or R807P, H932Y, G848S, or R709stop. In Infantile hepatocerebral found in cis with T251I and compound with R232G. Found in trans with R853W in PEO



Found in cis w/ T251I and in trans w/ G848S, also found as a hetero. Mutation with ataxia, ptosis, and neuropathy


Found in trans w/R232G and in cis w/T251I. Also, in cis w/P589L and in trans w/W748S.

Found in cis with T251I with both mutations on each allel. Also, found in cis w/A467T and in trans w/T251I.
Filosto, 2003: not detected in 120 healthy control alleles. Di Fonzo 2003: Not found in 100 DNA samples from healthy Italians Van Goethem, 2003: Not found in 280 control chromosomes Ferrari et al., 2005 reported 1 in 9 (11.11%) children with a combiniation of progressive neurological and hepatic failure, with a heterozygous frequency of 1% of Italian controls. (Van Goethem et al., 2003c)
(Di Fonzo et al., 2003; Filosto et al., 2003)
(Lamantea and Zeviani, 2004)
(Ferrari et al., 2005; Gonzalez - Vioque et al., 2006; Kollberg et al., 2005)



(Wong et al., 2008)




(Ashley et al., 2008)



(Stewart et al., 2008)
P589L 1766 c→t (exon 10) Alpers? Found in cis w/P587L and in trans w/W748S. (Ashley et al., 2008)
R597W 1789 c→t (exon 10) PEO with ataxia Homozygous (Stewart et al., 2008)
M603L 1807 a→t (exon 10) PEO with ptosis Found as compound in trans with T251I-P587L Gonzalez - Vioque 2006: Not detected in 100 control subjects (Gonzalez - Vioque et al., 2006)
L605R 1814_1815 tt→gc (exon 10) Alpers Found in trans w/ A467T. Mitochondria depletion in liver (Stewart et al., 2008)
R617C 1849 c→t (exon 10) Heterozygous with muscle weakness, exercise intolerance, hearing loss, arhythmia (Wong et al., 2008)
R627W 1879 c→t (exon 10) PEO, SANDO


Alpers
Ar Found in trans with A467T


Found in trans w/T914P
Van Goethem, 2003: absent in 612 Belgian controls. (Van Goethem et al., 2003a) (Horvath et al., 2006)

(Ashley et al., 2008)
R627Q 1880 g→a (exon 10) ataxia - myopathy Alpers PEO - ataxia - nueropathy



MELAS





Ataxia Neurpoathy
Found in cis with Q1236H and in trans with A467T
Found in compound in trans with R309H or R1096H in Alpers.
Found in cis with Q1236H and in trans with L965stop - E1143G in PEO
Found w/ G848S; heterozygous mutation; w/ mitochondrial myopathy, encephalopathy, lactic acidosis, and stroke-like episodes.

Found in cis w/ G11D and in trans w/ R852C.
(Luoma et al., 2005)
(Horvath et al., 2006)



(Deschauer et al., 2007)





(Wong et al., 2008)
P648R 1943 c→g (exon 10) PEO + myopathy
SANDO
ar, Found as either homozygous mutation or as compound in trans with R1096C in PEO.
Compound with R807C in SANDO.
Horvath et al., 2006 reported 0 out of 200 (0%) allelic frequency in Italian controls (Gago et al., 2006; Horvath et al., 2006)
E662K 1984 g→a (exon 11) Neutral polymorphism 2.8% of 450 individuals (GeneSNPs, 2004)
R709stop 2125 c→t (exon 12) PEO Sporadic
Found as compound with T251I-P587L
Di Fonzo 2003: Not found in 100 DNA samples from healthy Italians (Del Bo et al., 2003)
(Di Fonzo et al., 2003)
Q715X 2143 c→t (exon 12) Alpers Found in trans w/ A467T (Wong et al., 2008)
c. 2157+5_+6 2157 gc→ ag (exon 12) Alpers Found in trans with A467T, most likely a splice site mutation. (Wong et al., 2008)
R722H 2165 g→a(exon 13) Neutral polymorphism <1 % in control populations (Luoma et al., 2007)
G737R 2209 g→c (exon 13) Alpers
Parkinsonism



Charcot-Marie Tooth disease, (CMT) (profound cerebellar ataxia) arPEO+ and Myocerebrohepatopathy (MCHS)
Found as compound in trans with A767D Parkinsonism in compound in trans with R853W


Found in trans with the S64L-G737R in CMT
Found in trans w/ A467T. In trans w/ E1143G-R943C in MCHS. Found as a heterozygous mutation.
Horvath et al., 2006 reported 2 out of 666 allelic frequency in German controls


Found in 2/666 (0.3%) of control alleles
(Horvath et al., 2006)
(Davidzon et al., 2006)



(Harrower et al, 2008)
(Wong et al., 2008)
(Wong et al., 2008)
G746S 2236 g→a(exon 13) Ataxia, PEO Found in cis w/ E1143G, and in trans G848S 1in 454 alleles (Stewart et al., 2008)
W748S 2243 g→c (exon 13) ataxia - neuropathy, Alpers













Alpers, Ataxia Neuropathy, and arPEO+

Alpers


Alpers



PEO and Alpers
Usually found in cis with E1143G. Compound w/ 3630insC, also found as compound with L244P, G848S, and Y1210fs1216stop in Alpers. Found in compound with Q497H, L304R, or A467T in SCAE. Homozygous W748S +E1143G in ataxia - neuropathy and multiple respiratory chain deficiency.

Found in trans w/ G848S, and in cis w/ Q479H-E1143G. Also found in trans w/ A467T. arPEO+ as a compound w/ E1143G

Homozygous, juvenile onset


Found in trans w/ [R852C and G11D], and found in 2 additional pts in trans w/T914P.

Found homozygous in one pt. Found in trans w/ G848S. Found in trans w/[P587L and P589L].

Found in trans w/ A467T. In a 2nd pt., found in cis w/ E1143G and in trans w/ G11D and R852C.
Sarzi, et al. 2007 reported 2% (n=50) of patients with multiple respiratory chain deficiency with a 35% decrease of mtDNA were found with the mutation W748S with E1143G.

1% of Norwegians and 0.8% of Finns

Winterthun, 2005: 1 in 97 found in healthy controls and 1 in 99 found mtDNA disease patients
(Van Goethem et al., 2004)
(Davidzon et al., 2005; Ferrari et al., 2005)
(Hakonen et al., 2005; Nguyen et al., 2005; Winterthun et al., 2005)
(Horvath et al., 2006; Naimi et al., 2006; Tzoulis et al., 2006; Chan et al., 2006)
(Sarzi, et al. 2007)




(Wong et al., 2008)


(Uusimaa et al., 2008)


(Ashley et al., 2008)



(Stewart et al., 2008)
F749S 2246 t→c (exon 13) Alpers Found as compound with A467T Not found in 300 control chromosomes (Nguyen et al., 2006)
G763R 2287 g→c (exon 14) PEO, SANDO ar, Found as a homozygous mutation in PEO-SANDO Not found in 500 ethnically-matched control chromosomes (Santoro et al., 2006)
A767D 2300 c→a (exon 14) Alpers Found as compound in trans with G737R Not found in 678 alleles of German descent (Horvath et al., 2006)
2354Gins at G785 2354 ins g STOP @ CODON 806 (exon 14) PEO ar Compound with T251I Absent in 100 control DNA samples (Lamantea et al., 2002)
R807P 2420 g→c (exon 14) PEO Sporadic Compound with T251I-P587L Di Fonzo 2003: Not found in 100 DNA samples from healthy Italians (Del Bo et al., 2003)
(Di Fonzo et al., 2003)
R807C 2419 c→t (exon 14) SANDO Compound with P648R Not found in 200 ethnically matched control chromosomes (Gago et al., 2006)
c. 2480+1 2480+1 g→a splice (exon 15) Alpers Found in trans w/ W748S-E1143G (Wong et al., 2008)
IVS15 - 9 - c.2485del 12bp 2485 del 12bp (exon 16) Alpers Splice site mutation
3'exon15/intron junction, Found in trans with A467T
1 found in 666 German controls alleles (Horvath et al., 2006)
Y831C 2492 a→g (exon 16) Most likely a neutral polymorphism, but found in PEO and parkinsonism. Ad in PEO and Parkinsonism. Found in high percentage in healthy controls in three studies.







Heterozygous, hypotonia, Autism, neuropathy, ataxia, hearing loss, short stature, muscle weakness, fatigue
Mancuso 2004: Not seen in 120 control subjects Stopinska 2006: present in the Polish population at a frequency of 2.25%. Tiangyou 2006: Found at the same frequency in age-matched controls. Luoma 2007: Found in <1% of healthy controls (Barthelemy et al., 2002; Mancuso et al., 2004b)
(Stopinska et al., 2006; Tiangyou et al., 2006)
(Luoma et al., 2007)



(Wong et al., 2008)
G848S 2542 g→a (exon 16) PEO, Alpers




MELAS




Alpers



Alpers


PEO and Ataxia
ar
Compound with T251I and P587L.
Found as compound in Alpers with A467T, W748S and E1143G

Found w/ R627Q; heterozygous mutation; w/ mitochondrial myopathy, encephalopathy, lactic acidosis, and stroke-like episodes.

Found in trans with A467T, Q497H, W748S, and E1143G. Also found in trans w/ T251I-P587L

Found in trans w/W748S, and in a 2nd pt in trans w/A467T.

In trans w/ G746S and E1143G. Also found in trans w/ A467T.
Lamantea, 2002: absent in 100 control DNA samples (Lamantea et al., 2002)
(Ferrari et al., 2005)
(Davidzon et al., 2005; Kollberg et al., 2005; Nguyen et al., 2005)
(de Vries et al., 2006; Horvath et al., 2006; Kollberg et al., 2006)
(Deschauer et al., 2007)

(Wong et al., 2008)



(Ashley et al., 2008)


(Stewart et al., 2008)
T849H 2544 (insertion of c with fs868X) (exon 16) Alpers Found in trans with A467T and in cis with Q1236H (Wong et al., 2008)
T851A 2551 a→g (exon 16) Alpers

Alpers
Found in trans w/R1047W.

Found in trans w/H277C.
Not found in over 100 control alleles (Wiltshire et al., 2006)

(Ashley et al., 2008)
R852C 2554 c→t (exon 16) Alpers

Ataxia Neuropathy

Alpers



Alpers
Compound with A467T

Found in trans w/ G11D-R627Q

Found in cis w/G11D and in trans w/W748S, and in a 2nd pt found in cis w/G11D and in trans w/A467T.

Found in cis w/G11D and in trans w/ A467T. In a 2nd pt., found in cis w/G11D and in trans w/ W748S and E1143G.
Not found in 300 control chromosomes (Nguyen et al., 2006)

(Wong et al., 2008)

(Ashley et al., 2008)



(Stewart et al., 2008)
R853W 2557 c→t (exon 16) PEO with ptosis
Parkinsonism
Found as compound in trans with P587L Parkinsonism in compound in trans with G737R Gonzalez - Vioque 2006: Not detected in 100 control subjects (Gonzalez - Vioque et al., 2006)
(Davidzon et al., 2006)
R853Q 2558 g→a (exon 16) Myocerebrohepatopathy In trans with T251I-P587L (Wong et al., 2008)
V855A 2564 t→c (exon 16) Heterozygous with muscle weakness. (Wong et al., 2008)
A862T 2584 g→a (exon 16) Ataxia Neuropathy

PEO+
Compound heterozygous with R964C

In trans w/R1047W
(Wong et al., 2008)

(Stewart et al., 2008)
N864S 2591 a→g (exon 16) PEO Found as compound with T251I-P587L Not found in 280 control chromosomes (Van Goethem et al., 2003c)
E873stop 2617 g→t (exon 17) Alpers



Alpers
Found in trans with A467T



Found in trans w/A467T.
Not found in 40 alleles from non-Alpers mitochondrial disease patients (Chan et al., 2005b; Naviaux and Nguyen, 2004; Naviaux and Nguyen, 2005)


(Ashley et al., 2008)
Q879H 2637 g→t (exon 17) Alpers


Alpers w/ valproate-induced hepatic failure
Found in cis with E1143G and in trans with A467T-T885S

Found in cis w/ A467T and T885S, and in trans w/ E1143
Horvath et al., 2006 reported 0 out of 192 (0%) allelic frequency in British controls (Horvath et al., 2006)


(McFarland et al., 2008)
T885S 2653 a→t (exon 17) Alpers


Alpers w/ valproate-induced hepatic failure
Found in cis with A467T and in trans with Q879H-E1143G

Found in cis with A467T, and in trans w/Q879H and E1143G
Horvath et al., 2006 reported 0 out of 192 (0%) allelic frequency in British controls


(Horvath et al., 2006)


(McFarland et al., 2008)
L886P 2657 t→c (exon 17) Alpers Found in trans w/ A467T (Wong et al., 2008)
A889T 2665 g→a (exon 17) PEO Sporadic / unknown
Compound with R579W
Compound with E1143G
Filosto, 2003: not detected in 120 healthy control alleles (Filosto et al., 2003)
(Hisama et al., 2005)
T914P 2740 a→c (exon 18) Alpers, Encephalopathy, PEO


Alpers

adPEO


Alpers
Compound in trans with A467T. In PEO-myopathy found in cis with F1164I and in trans with Q308H

Found in trans w/A467T

Heterozygous, Ptosis, exercise intolerance, fatigue, ragged red fibers

Found in trans w/R1096C, and in a 2nd pt found in trans w/R627W. Also found in trans w/A467T in 2 other pts. Found in 2 additional pts in trans w/W748S.
Not found in 664 German controls or 200 Italian controls. (Nguyen et al., 2006)
(Horvath et al., 2006)
(Naimi et al., 2006)

(Wong et al., 2008)

(Wong et al., 2008)


(Ashley et al., 2008)
W918R 2752 t→c(exon 18) PEO with Parkinsonism Compound (in trans) heterozygous with M430L Absent in 200 control alleles (Invernizzi et al., 2008)
G923D 2768 g→a (exon 18) PEO ad Lamantea, 2002: Not found in a control group of 100 DNA samples from unrelated Italians (Lamantea et al., 2002)
(Graziewicz et al., 2004; Stuart et al., 2006)
H932Y 2794 c→t (exon 18) PEO, SANDO ar
Found as compound with T251I-P587L
Found as compound with G1051R
Mancuso 2004: not seen in 120 control subjects. Di Fonzo 2003: Not found in 100 DNA samples from healthy Italians (Di Fonzo et al., 2003)
(Mancuso et al., 2004a)
R943C 2827 c→t (exon 18) Myocerebrohepatopathy In cis w/ E1143G and in trans w/G737R (Wong et al., 2008)
R943H 2828 g→a (exon 18) PEO ad Lamantea, 2002: Not found in a control group of 100 DNA samples from unrelated Italians (Lamantea et al., 2002)
(Graziewicz et al., 2004; Stuart et al., 2006)
R953C 2857 c→t (exon 18) PEO ad Luoma, 2004: None noted in screening of 1640 healthy Finnish control chromosomes. (Luoma et al., 2004)
Y955C 2864 a→g (exon 18) PEO +/-
Parkinsonism
Premature ovarian failure Alzheimer's disease
ad
Most severe autosomal dominant mutation in POLG, drastically lowers polymerase catalysis, promotes stalling and errors in replication.






Found as a heterozygous mutation w/ hearing loss, failure to thrive, generalized ETC complex defiency
Lamantea, 2002: Not found in a control group of 100 DNA samples from unrelated Italians


Luoma, 2004: None noted in screening of 1640 healthy Finnish control chromosomes.
(Van Goethem et al., 2001) (Lamantea et al., 2002) (Graziewicz et al., 2004; Luoma et al., 2004; Pagnamenta et al., 2006; Ponamarev et al., 2002; Stuart et al., 2006) (Baruffini et al., 2006; Kollberg et al., 2005; Lewis et al., 2007; Melberg et al., 2005)

(Wong et al., 2008)
A957S 2869 g→t (exon 18) PEO ad PEO Lamantea, 2002: Not found in a control group of 100 DNA samples from unrelated Italians Ferrari, 2005: absent in 200 consecutive control individuals from Northern continental Europe as well as 350 Italian controls (Lamantea et al., 2002)
(Ferrari et al., 2005; Graziewicz et al., 2004; Stuart et al., 2006)
A957P 2869 g→c (exon 18) Alpers Found in Alpers as a compound with A467T (de Vries et al., 2006; Ferrari et al., 2005)
F961S 2882 t → c PEO ad PEO (Adachi et al., 2002)
R964C 2890 c → t (exon 18) Mitochondrial toxicity susceptibility to NRTIs


Ataxia Neuropathy
Found in a HIV1 patient with hyperlactatemia following 1 yr of d4T and 3TC anti-viral treatment

Found in trans w/ A862T, and found as a heterozygous mutation w/ ataxia and hypotonia
Not found in 26 Thai HIV-1–infected individuals, or 110 healthy volunteers (Yamanaka et al., 2007)



(Wong et al., 2008)
L83P 248 t → c Alpers Compound heterozygous with G888S in 10 yr old (Bao et al., 2007)
L965stop 2894 t→g (exon 18) PEO ar, found in cis with E1143G and in trans with R627Q-Q1236H (Horvath et al., 2006)
L966R 2897 t→g (exon 18) Alpers


Alpers
Compound with A467T


In trans w/A467T.
Not found in 300 control chromosomes (Nguyen et al., 2006)


(Ashley et al., 2008)
W1020stop 3057 g→a (exon 19) Alpers Compound with A467T (Nguyen et al., 2005)
R1047Q 3140 g→a (exon 20) PEO Sporadic / unknown Not found in 250 control individuals (Agostino et al., 2003)
R1047W 3140 g→a (exon 20) Alpers

PEO
Compound in trans with T851A

In trans w/ A862T
Not found in over 100 control alleles (Wiltshire et al., 2006)

(Stewart et al., 2008)
G1051R 3151 g→c (exon 20) PEO, SANDO ar
Found as compound with H932Y
not seen in 120 control subjects. (Mancuso et al., 2004a)
G1076V 3227 g→t (exon 20) PEO Sporadic / unknown Not detected in 120 healthy control alleles (Filosto et al., 2003)
I1079L 3235 a→c (exon 20) adPEO Heterozygous Hearing loss, ptosis (Wong et al., 2008)
S1095R 3285 c→g (exon 21) adPEO Hearing loss, ptosis, Muscle weakness, optic atrophy (Wong et al., 2008)
R1096C 3286 c→t (exon 21) PEO
Alpers



Alpers

Alpers
Sporadic or ar in PEO Found in trans with P648R in PEO-myopathy. Found as homozygous mutation with Q1236H in Alpers

Found as compound w/ Q1236H

Found in trans w/T914P, and homozygous in a 2nd pt.
Agostino 2003: Not found in 250 individuals (Agostino et al., 2003)
(Horvath et al., 2006)



(Wong et al., 2008)

(Ashley et al., 2008)
R1096H 3287 g→a (exon 21) Alpers Found as a compound in trans with R627Q (Horvath et al., 2006)
S1104C 3311 c→g (exon 21) PEO Sporadic / unknown Found as compound with A467T Not found in 250 individuals (Agostino et al., 2003)
A1105T 3313 g→a (exon 21) PEO Ad Luoma, 2004: None noted in screening of 1640 healthy Finnish control chromosomes. (Luoma et al., 2004; Wanrooij et al., 2004)
V1106I 3316 g→a (exon 21) PEO ar, found in trans with T251I-P587L Not found in 500 Italian controls. (Horvath et al., 2006)
R1128H 3383g→a (exon 21) Microcephaly Heterozygous, found w/ G517V (Wong et al., 2008)
R1138C 3412 c→t (exon 21) arPEO+ Found in trans w/ A467T (Wong et al., 2008)
R1142W 3424 c→t (exon 21) Neutral polymorphism 0.6% of 450 individuals (GeneSNPs, 2004)
E1143G 3428 a→g (exon 21) Neutral polymorphism but may modulate disease mutations








Alpers with valproate-induced hepatic failure

Alpers, Ataxia Neuropathy, and arPEO+ Myocerbrohepato- Pathy (MCHS)


PEO and Ataxia
Has also been found in PEO and ataxia-neuropathy patients. Found in adPEO in cis with A889T Found in ataxia-neuropathy in cis with W748S and in compound with G848S or A467T. Found in cis with W748S in Alpers and in compound with L244P, G848S, M1163R or Y1210fs1216stop. Homozygous W748S +E1143G in ataxia-neuropathy and multiple respiratory chain deficiency.

Found in cis w/ T885S and A467T, and in trans w/ Q879H


Found in trans w/ G848S, and in cis w/Q497H-W748S. Also found in trans w/ A467T, and in cis w/ Q497H-W748S. Also in cis w/ E1143 and in trans w/ G737R in MCHS.

Found in cis w/ G746S and in trans w/ G848S. In a 2nd pt., found in cis w/W748S and in trans w/ G11D and R852C.
SNP at 3.7% of 450 individuals of European descent. Not found in Asian or African populations
Sarzi, et al. 2007 reported 2% (n=50) of patients with multiple respiratory chain deficiency with a 35% decrease of mtDNA were found with the mutation W748S with E1143G.
(GeneSNPs, 2004) (Di Fonzo et al., 2003; Van Goethem et al., 2004) (Hisama et al., 2005) (Ferrari et al., 2005) (Davidzon et al., 2005; Nguyen et al., 2005; Winterthun et al., 2005) (Chan et al., 2006; Horvath et al., 2006; Kollberg et al., 2006) (Sarzi, et al. 2007)

(McFarland et al., 2008)



(Wong et al., 2008)





(Stewart et al., 2008)
R1146C 3436 c→t (exon 21) Neutral polymorphism Also found in one patient with muscle atrophy 0.6% of 450 individuals (GeneSNPs, 2004; Gonzalez-Vioque et al., 2006)
3482 +2T to C 3482 +2t’s splice at intron 21 (exon 21) Alpers Exon21/Intron21 splice site mutation at a.a. 1161. Found in trans with A467T Horvath 2006, not found in 666 German controls. (Ferrari et al., 2005) (Horvath et al., 2006)
M1163R 3488 t→g (exon 22) Alpers Found as compound in trans with W748S - E1143G Not found in 200 control alleles (Kollberg et al., 2006)
F1164I 3490 t→a (exon 22) PEO Ar, found in cis with T914P and in trans with Q308H Not found in 200 Italian controls (Horvath et al., 2006)
L1173fs stop 3518 ins gact, fs in exon 22 (exon 22) Alpers Compound with A467T Not found in 300 control chromosomes (Nguyen et al., 2006)
S1176L 3527 c→t (exon 22) PEO ar
Found as compound w/ R227W
Lamantea, 2002: Not found in a control group of 100 DNA samples from unrelated Italians (Lamantea et al., 2002)
(Lamantea and Zeviani, 2004)
D1184N 3550 g→a (exon 22) PEO and tetraparesis
Severe childhood multi-system disorder
Compound in trans with N468D
In severe childhood multi-system disorder found as compound with R227W
Gonzalez - Vioque 2006: Not detected in 100 control subjects (Gonzalez - Vioque et al., 2006; de Vries et al., 2006)
R1187W 3559 c→t (exon 22) ? Found in a patient with mitochondrial depletion syndrome and T cell immunodeficiency.
Pathogenesis unclear.
Not detected in 100 Turkish control alleles (Reichenbach et al., 2006)
K1191N 3573 g→t (exon 22) Alpers Compound in trans with A467T Not found in 664 German controls (Horvath et al., 2006)
K1191R 3572 a→g (exon 22) Myocerebrohepatopathy In trans with T251I-P587L (Wong et al., 2008)
D1196N 3586 g→a (exon 22) Myopathy In trans w/ G517V (Wong et al., 2008)
G1205A 3614 g→ c (exon 22) Heterozygous w/ Retinitis pigmentosa, hearing loss, failure to thrive (Wong et al., 2008)
Y1210fs1216stop 3630 ins c (exon 22) Alpers Compound in trans with W748S - E1143G, Mutation causes frameshift to stop at a.a. 1225 (Ferrari et al., 2005)
S1230F 3689 c→t Neutral polymorphism <1 % in control populations (Luoma et al., 2007)
Q1236H 3708 g→t (exon 22) Neutral polymorphism



Alpers
Has also been found in PEO patients, and in ataxia - myopathy in cis with R627Q and in trans with A467T

Found in trans with A467T, and in cis w/ T849H. Also found as a compound w/ R1096C.
4.0% of 450 individuals (GeneSNPs, 2004)
(Di Fonzo et al., 2003)
(Luoma et al., 2005)

(Wong et al., 2008)


diagram of POLG mutations

Visual overview of the POLG mutations. Download larger view.

R3P G11D G11D P18S ±Glu at aa 43-55 Q43R Q49E,S64L Q68X L83P G888S H110Y A143V R193Q C224Y R227W R227P R232G R232H R232H W235stop P241L L244P T251I T251I G268A H277C L304R L304R S305R Q308H R309L R309H W312R P324S T326fsX387 W347_L356 del R374X G380D L392V R417T C418R L424GfsX28 (CT)deletion - 452stop L428P M430L G431V S433C T452stop L463F A467T A467T N468D Q497H Q497H S511N G517V R546C K561M R562Q H569Q R574W R574W R579W P587L P587L P589L R597W M603L L605R R617C R627W R627W R627W R627Q R627Q R627Q P648R P648R E662K R709stop Q715X c. 2157+5_+6 R722H G737R G737R G737R G746S W748S W748S W748S F749S G763R G763R A767D 2354Gins at G785 R807P R807C c. 2480+1 IVS15 - 9 - c.2485del 12bp Y831C Y831C G848S G848S T849H T851A R852C R852C R853W R853Q V855A A862T N864S E873stop Q879H T885S L886P A889T T914P W918R G923D H932Y H932Y R943C R943H R953C Y955C A957S A957P F961S R964C R964C L83P L965stop L966R W1020stop R1047Q R1047W G1051R G1051R G1076V I1079L S1095R R1096C R1096C R1096H S1104C A1105T V1106I R1128H R1138C E1143G E1143G R1142W,R1146C,E1143G 3482 +2T to C M1163R F1164I L1173fs stop S1176L D1184N D1184N R1187W K1191N K1191R D1196N G1205A Y1210fs1216stop S1230F,Q1236H
USA.gov Department of Health & Human Services National Institutes of Health
This page URL: http://tools.niehs.nih.gov/polg/index.cfm
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Last Reviewed: 7 April 2006