16 January, 2009
Volume 33, Issue 1

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Volume 33, Issue 1

On the cover: The image shows a confocal section through a yeast cell expressing Tgl4-GFP (in green) that localizes on the surface of lipid droplets (visualized by staining with Nile red). Tgl4 is a major yeast triacylglycerol lipase that is activated by phosphorylation by cyclin-dependent kinase. Lipolysis-derived metabolites are required to facilitate G1/S transition of the yeast cell cycle. For details, see Kurat et al. (p. 53).

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Featured Animation

The rotating structure of the complex of Seh1 and Nup85 solved by Debler et al. in the December 26 issue. This complex, along with a complex of Sec13 and Nup145C, is proposed to assemble into a repetitive "fence-like" coat around the nuclear pore that shares properties with the COPII coats of vesicles in the secretory pathway.


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Endowment for Scholars
Biomedical Research
The University of Texas Southwestern Medical Center

UT Southwestern is pleased to announce the continuation of the Endowed Program for Scholars in Biomedical Research. The Program, which is fully funded from private endowment, will provide at least $1,000,000 over four years to support the research activities of each new Assistant Professor (tenure track) appointed to the Program; five will be appointed annually. For more information visit click here.

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Molecular Mechanisms @ Cell Press


Trends in Biochemical Sciences
The exosome: a multipurpose RNA-decay machine
Manfred Schmid and Torben Heick Jensen

Trends in Genetics
Insights into the connection between cancer and alternative splicing
Eddo Kim, Amir Goren, and Gil Ast

Trends in Genetics
Widespread and subtle: alternative splicing at short-distance tandem sites
Michael Hiller and Matthias Platzer

Trends in Neurosciences
RNA editing, DNA recoding and the evolution of human cognition
John S. Mattick and Mark F. Mehler


Current Issue

Volume 33 Issue 1: January 15, 2008
Next issue: January 29, 2009

Included in this issue:

PKC phosphorylation of TRAF2 in TNFα-induced NF-κB signaling
PNRC2 links nonsense-mediated decay to decapping
Suppression of HIV-1 Nef translation by a Sam68 mutant
Trafficking of bacterial transcription regulators
β-TrCP and RSK 1/2-mediated BimEL degradation inhibits apoptosis
MRN and Ctp1 in topoisomerase release from DNA

Click here for the complete Table of Contents.

Featured Articles

The Featured Articles are freely available to all readers

Global Map of SUMO Function
Using a systems approach that combines genetic and biochemical analyses, Makhnevych et al. link the SUMO system to a broad range of biological processes, providing a useful resource for the SUMO field.
A Bax Isoform Regulated by the Proteasome
Bax is a key regulator of apoptosis. Fu et al. report that Baxβ is a primate-specific isoform that encodes a proapoptotic protein regulated by a mechanism distinct from the well-studied Baxα protein. Moreover, Baxβ synergizes with Baxα to promote apoptosis.

Featured Review

The Featured Review is freely available to all readers

Protein Arginine Methylation in Mammals: Who, What, and Why
Mark Bedford and Steven Clark

Posttranslational modifications can affect nearly all facets of cellular signaling pathways. The PRMT family of enzymes, together with their binding partners, directs protein arginine methylation. In this Review, Mark Bedford and Steven Clark provide an update on the regulatory mechanisms and cellular effects of arginine methylation in mammals.

Featured Topic

RNA processing is often essential for converting primary transcripts to mature, functional RNAs. It regulates RNA biogenesis, stability, and translation efficiency and contributes to the potential diversity of a genome through alternative splicing and RNA editing. The following selection of reviews and articles highlight the diversity of RNA-processing mechanisms and the functional impact of RNA-processing events.

The Control of mRNA Decapping and P-Body Formation
*FREE REVIEW*
Tobias M. Franks and Jens Lykke-Andersen

“Nought May Endure but Mutability”: Spliceosome Dynamics and the Regulation of Splicing
*FREE REVIEW*
Duncan J. Smith, Charles C. Query, and Maria M. Konarska

Alternative splicing resulting in nonsense-mediated mRNA decay: what is the meaning of nonsense?
*FREE TiBS REVIEW*
Nicholas J. McGlincy and Christopher W.J. Smith

A Genetic Interaction Map of RNA-Processing Factors Reveals Links between Sem1/Dss1-Containing Complexes and mRNA Export and Splicing
Gwendolyn M. Wilmes, Megan Bergkessel, Sourav Bandyopadhyay, Michael Shales, Hannes Braberg, Gerard Cagney, Sean R. Collins, Gregg B. Whitworth, Tracy L. Kress, Jonathan S. Weissman, et al.

Cotranscriptional Recruitment of the mRNA Export Factor Yra1 by Direct Interaction with the 3′ End Processing Factor Pcf11
Sara Ann Johnson, Gabrielle Cubberley, and David L. Bentley

Nuclear mRNA Surveillance in THO/sub2 Mutants Is Triggered by Inefficient Polyadenylation
Cyril Saguez, Manfred Schmid, Jens Raabjerg Olesen, Mohamed Abd El-Hady Ghazy, Xiangping Qu, Mathias Bach Poulsen, Tommy Nasser, Claire Moore, and Torben Heick Jensen

Lin28 Mediates the Terminal Uridylation of let-7 Precursor MicroRNA
Inha Heo, Chirlmin Joo, Jun Cho, Minju Ha, Jinju Han, and V. Narry Kim

A Human snoRNA with MicroRNA-Like Functions
Christine Ender, Azra Krek, Marc R. Friedländer, Michaela Beitzinger, Lasse Weinmann, Wei Chen, Sébastien Pfeffer, Nikolaus Rajewsky, and Gunter Meister

A Conformational Rearrangement in the Spliceosome Sets the Stage for Prp22-Dependent mRNA Release
Beate Schwer

RBM5/Luca-15/H37 Regulates Fas Alternative Splice Site Pairing after Exon Definition
Sophie Bonnal, Concepción Martínez, Patrik Förch, Angela Bachi, Matthias Wilm, and Juan Valcárcel

Guide RNA-Binding Complex from Mitochondria of Trypanosomatids
James Weng, Inna Aphasizheva, Ronald D. Etheridge, Lan Huang, Xiaorong Wang, Arnold M. Falick, and Ruslan Aphasizhev

Widespread Impact of Nonsense-Mediated mRNA Decay on the Yeast Intronome
Shakir Sayani, Michael Janis, Chrissie Young Lee, Isabelle Toesca, and Guillaume F. Chanfreau

Efficiency of the Pioneer Round of Translation Affects the Cellular Site of Nonsense-Mediated mRNA Decay
Hanae Sato, Nao Hosoda, and Lynne E. Maquat


For additional reviews on this topic, please see Molecular Mechanisms @ Cell Press.

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