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TABLE OF CONTENTS
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December 2017 Volume 24, Issue 12 |
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| News and Views Review Perspective Articles | |
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News and Views | Top |
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Perspective | Top |
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The ribosome moves: RNA mechanics and translocation pp1021 - 1027 Harry F Noller, Laura Lancaster, Jie Zhou and Srividya Mohan doi:10.1038/nsmb.3505 The mechanics and mechanisms of ribosomal translocation, including the conformational rearrangements in the ribosome and the roles of EF-G and tRNAs, are discussed in this Perspective by Mohan, Noller and colleagues. |
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Articles | Top |
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Molecular analysis of PRC2 recruitment to DNA in chromatin and its inhibition by RNA pp1028 - 1038 Xueyin Wang, Richard D Paucek, Anne R Gooding, Zachary Z Brown, Eva J Ge et al. doi:10.1038/nsmb.3487 Biochemical reconstitution of PRC2 interactions with chromatinized templates demonstrates that protein-free linker DNA dominates the PRC2-nucleosome interaction, while RNA inhibits binding. |
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DNA binding by PHF1 prolongs PRC2 residence time on chromatin and thereby promotes H3K27 methylation pp1039 - 1047 Jeongyoon Choi, Andreas Linus Bachmann, Katharina Tauscher, Christian Benda, Beat Fierz et al. doi:10.1038/nsmb.3488 The DNA-binding activity of the winged-helix domain of PHF1 stabilizes PRC2 on chromatin, thereby permitting efficient H3K27 trimethylation. |
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Histone propionylation is a mark of active chromatin pp1048 - 1056 Adam F Kebede, Anna Nieborak, Lara Zorro Shahidian, Stephanie Le Gras, Florian Richter et al. doi:10.1038/nsmb.3490 Histone H3 lysine 14 is propionylated and butyrylated in vivo in a metabolic-state-dependent manner and these modifications promote high levels of transcription. |
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Short poly(A) tails are a conserved feature of highly expressed genes pp1057 - 1063 Sarah Azoubel Lima, Laura B Chipman, Angela L Nicholson, Ying-Hsin Chen, Brian A Yee et al. doi:10.1038/nsmb.3499 Although deadenylation induces translational inhibition and mRNA decay, well-expressed transcripts are now shown to possess short, well-defined poly(A) tails, suggesting that pruned tails may be ideal for protective and translational functions. See also: News and Views by Castellano & Bazzini |
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Dissecting the telomere-inner nuclear membrane interface formed in meiosis pp1064 - 1072 Devon F Pendlebury, Yasuhiro Fujiwara, Valerie M Tesmer, Eric M Smith, Hiroki Shibuya et al. doi:10.1038/nsmb.3493 Structural and functional analyses of human TRF1 in complex with meiosis-specific protein TERB1 reveal the basis for telomere tethering to the inner nuclear membrane and offer insight into the mechanism of dissociation in late pachytene. |
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Telomeric TERB1-TRF1 interaction is crucial for male meiosis pp1073 - 1080 Juanjuan Long, Chenhui Huang, Yanyan Chen, Ying Zhang, Shaohua Shi et al. doi:10.1038/nsmb.3496 Disrupting the interaction between telomere protein TRF1 with meiosis-specific protein TERB1 impairs the pairing of X and Y chromosomes via their telomere-adjacent pseudoautosomal regions in pachytene, leading to spermatocyte apoptosis and male infertility in mice. |
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Dynamic regulation of CD28 conformation and signaling by charged lipids and ions pp1081 - 1092 Wei Yang, Weiling Pan, Shuokai Chen, Nicola Trendel, Shutan Jiang et al. doi:10.1038/nsmb.3489 CD28 signaling motifs are sequestered within the membrane via interactions with phospholipids. TCR activation increases the local Ca2+ concentration, which disrupts CD28-lipid interactions. |
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A consensus model of human apolipoprotein A-I in its monomeric and lipid-free state pp1093 - 1099 John T Melchior, Ryan G Walker, Allison L Cooke, Jamie Morris, Mark Castleberry et al. doi:10.1038/nsmb.3501 Apolipoprotein A-I (apoA-I) is the scaffold protein that is essential for the assembly and function of HDL particles. A structural model for monomeric, lipid-free apoA-I, based on previous and new data, is now presented. |
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Molecular basis of lipid-linked oligosaccharide recognition and processing by bacterial oligosaccharyltransferase pp1100 - 1106 Maja Napiorkowska, Jeremy Boilevin, Tina Sovdat, Tamis Darbre, Jean-Louis Reymond et al. doi:10.1038/nsmb.3491 The crystal structure of the single-subunit oligosaccharyltransferase PglB in complex with acceptor peptide and a synthetic lipid-linked oligosaccharide analog reveals a key intermediate in the reaction mechanism. See also: News and Views by Shrimal et al. |
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Preribosomes escaping from the nucleus are caught during translation by cytoplasmic quality control pp1107 - 1115 Anshuk Sarkar, Matthias Thoms, Clara Barrio-Garcia, Emma Thomson, Dirk Flemming et al. doi:10.1038/nsmb.3495 Abnormal pre-60S particles are able to escape nuclear quality control and join mature 40S subunits to catalyze cytoplasmic protein synthesis, but the resulting translation defects trigger the cytoplasmic surveillance machineries RQC and the Ski-exosome. |
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The helicase domain of Polθ counteracts RPA to promote alt-NHEJ pp1116 - 1123 Pedro A Mateos-Gomez, Tatiana Kent, Sarah K Deng, Shane McDevitt, Ekaterina Kashkina et al. doi:10.1038/nsmb.3494 Biochemical and cellular analyses reveal that the helicase activity of DNA polymerase theta (Polθ) antagonizes RPA to promote DNA strand annealing and double-strand break repair via alt-NHEJ in mouse ES cells. See also: News and Views by Campbell & Li |
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Extrachromosomal telomere repeat DNA is linked to ALT development via cGAS-STING DNA sensing pathway pp1124 - 1131 Yi-An Chen, Yi-Ling Shen, Hsuan-Yu Hsia, Yee-Peng Tiang, Tzu-Ling Sung et al. doi:10.1038/nsmb.3498 The cGAS-STING cytoplasmic-DNA-sensing pathway is activated by accumulation of extrachromosomal telomere repeats, and this proliferation-inhibition mechanism is defective in ALT cancer cells. |
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Programming asynchronous replication in stem cells pp1132 - 1138 Hagit Masika, Marganit Farago, Merav Hecht, Reba Condiotti, Kirill Makedonski et al. doi:10.1038/nsmb.3503 Asynchronous replication-timing patterns undergo programmed switching between maternal and paternal alleles in embryonic and adult stem cells. |
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TFIIH generates a six-base-pair open complex during RNAP II transcription initiation and start-site scanning pp1139 - 1145 Eric J Tomko, James Fishburn, Steven Hahn and Eric A Galburt doi:10.1038/nsmb.3500 During transcription initiation, Ssl2, the dsDNA translocase of TFIIH, opens a 6-bp DNA bubble, suggesting a two-step model wherein Ssl2 triggers a 6-bp open complex that RNA polymerase II expands via NTP-dependent RNA transcription. |
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Cryo-EM structures of the human endolysosomal TRPML3 channel in three distinct states pp1146 - 1154 Xiaoyuan Zhou, Minghui Li, Deyuan Su, Qi Jia, Huan Li et al. doi:10.1038/nsmb.3502 Cryo-EM analyses of human TRPML3 reveal this channel in three different states—closed, agonist-activated and low-pH-inhibited—and suggest mechanisms for regulation. |
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Encoding optical control in LCK kinase to quantitatively investigate its activity in live cells pp1155 - 1163 Ardiyanto Liaunardy-Jopeace, Ben L Murton, Mohan Mahesh, Jason W Chin and John R James doi:10.1038/nsmb.3492 Engineering an LCK mutant, in which an active-site lysine is replaced by a photocaged equivalent via genetic code expansion, allows quantitation of phosphorylation kinetics in situ and provides insights into LCK activation dynamics. |
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npj Molecular Phenomics is an online-only, open access journal that provides a forum for cutting-edge scientific advances in the emerging field of phenomics, the study of the physical and chemical characteristics of an individual in quantitative terms. Part of the Nature Partner Journals series, npj Molecular Phenomics is published in partnership with Fudan University. The journal is now open for submissions. Find out more >>> | | |
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