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).
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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The Featured Articles are freely available to all readers
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. |
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. |
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. | |
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. |