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  • 1
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    The tyrosine kinase negative regulator c-Cbl as a RING-type, E2-dependent ubiquitin-protein ligase (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-10-09
    Description: Ubiquitination of receptor protein-tyrosine kinases (RPTKs) terminates signaling by marking active receptors for degradation. c-Cbl, an adapter protein for RPTKs, positively regulates RPTK ubiquitination in a manner dependent on its variant SRC homology 2 (SH2) and RING finger domains. Ubiquitin-protein ligases (or E3s) are the components of ubiquitination pathways that recognize target substrates and promote their ligation to ubiquitin. The c-Cbl protein acted as an E3 that can recognize tyrosine-phosphorylated substrates, such as the activated platelet-derived growth factor receptor, through its SH2 domain and that recruits and allosterically activates an E2 ubiquitin-conjugating enzyme through its RING domain. These results reveal an SH2-containing protein that functions as a ubiquitin-protein ligase and thus provide a distinct mechanism for substrate targeting in the ubiquitin system.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Joazeiro, C A -- Wing, S S -- Huang, H -- Leverson, J D -- Hunter, T -- Liu, Y C -- CA39780/CA/NCI NIH HHS/ -- R01 DK56558/DK/NIDDK NIH HHS/ -- T32CA09523/CA/NCI NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1999 Oct 8;286(5438):309-12.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉The Salk Institute, Molecular Biology and Virology Laboratory, La Jolla, CA 92037, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10514377" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Cell Line ; Humans ; Ligases/chemistry/*metabolism ; Molecular Sequence Data ; Phosphotyrosine/metabolism ; Point Mutation ; Proto-Oncogene Proteins/chemistry/genetics/*metabolism ; Proto-Oncogene Proteins c-cbl ; Receptor Protein-Tyrosine Kinases/*metabolism ; Receptor, Platelet-Derived Growth Factor beta/metabolism ; Recombinant Fusion Proteins/metabolism ; Sequence Alignment ; Signal Transduction ; *Ubiquitin-Conjugating Enzymes ; Ubiquitin-Protein Ligases ; Ubiquitins/*metabolism ; src Homology Domains
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 2
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    Ancestral developmental potential facilitates parallel evolution in ants (2012)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2012-01-10
    Description: Complex worker caste systems have contributed to the evolutionary success of advanced ant societies; however, little is known about the developmental processes underlying their origin and evolution. We combined hormonal manipulation, gene expression, and phylogenetic analyses with field observations to understand how novel worker subcastes evolve. We uncovered an ancestral developmental potential to produce a "supersoldier" subcaste that has been actualized at least two times independently in the hyperdiverse ant genus Pheidole. This potential has been retained and can be environmentally induced throughout the genus. Therefore, the retention and induction of this potential have facilitated the parallel evolution of supersoldiers through a process known as genetic accommodation. The recurrent induction of ancestral developmental potential may facilitate the adaptive and parallel evolution of phenotypes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rajakumar, Rajendhran -- San Mauro, Diego -- Dijkstra, Michiel B -- Huang, Ming H -- Wheeler, Diana E -- Hiou-Tim, Francois -- Khila, Abderrahman -- Cournoyea, Michael -- Abouheif, Ehab -- New York, N.Y. -- Science. 2012 Jan 6;335(6064):79-82. doi: 10.1126/science.1211451.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology, McGill University, 1205 Avenue Dr. Penfield, Montreal, Quebec, Canada, H3A 1B1.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/22223805" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Ants/*genetics/growth & development/physiology ; *Biological Evolution ; Environment ; Female ; Genes, Insect ; Larva/growth & development ; Male ; Methoprene/pharmacology ; Molecular Sequence Data ; Phenotype ; Phylogeny ; Selection, Genetic ; Social Behavior ; Wings, Animal/growth & development
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 3
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    A draft sequence for the genome of the domesticated silkworm (Bombyx mori) (2004)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2004-12-14
    Description: We report a draft sequence for the genome of the domesticated silkworm (Bombyx mori), covering 90.9% of all known silkworm genes. Our estimated gene count is 18,510, which exceeds the 13,379 genes reported for Drosophila melanogaster. Comparative analyses to fruitfly, mosquito, spider, and butterfly reveal both similarities and differences in gene content.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Xia, Qingyou -- Zhou, Zeyang -- Lu, Cheng -- Cheng, Daojun -- Dai, Fangyin -- Li, Bin -- Zhao, Ping -- Zha, Xingfu -- Cheng, Tingcai -- Chai, Chunli -- Pan, Guoqing -- Xu, Jinshan -- Liu, Chun -- Lin, Ying -- Qian, Jifeng -- Hou, Yong -- Wu, Zhengli -- Li, Guanrong -- Pan, Minhui -- Li, Chunfeng -- Shen, Yihong -- Lan, Xiqian -- Yuan, Lianwei -- Li, Tian -- Xu, Hanfu -- Yang, Guangwei -- Wan, Yongji -- Zhu, Yong -- Yu, Maode -- Shen, Weide -- Wu, Dayang -- Xiang, Zhonghuai -- Yu, Jun -- Wang, Jun -- Li, Ruiqiang -- Shi, Jianping -- Li, Heng -- Li, Guangyuan -- Su, Jianning -- Wang, Xiaoling -- Li, Guoqing -- Zhang, Zengjin -- Wu, Qingfa -- Li, Jun -- Zhang, Qingpeng -- Wei, Ning -- Xu, Jianzhe -- Sun, Haibo -- Dong, Le -- Liu, Dongyuan -- Zhao, Shengli -- Zhao, Xiaolan -- Meng, Qingshun -- Lan, Fengdi -- Huang, Xiangang -- Li, Yuanzhe -- Fang, Lin -- Li, Changfeng -- Li, Dawei -- Sun, Yongqiao -- Zhang, Zhenpeng -- Yang, Zheng -- Huang, Yanqing -- Xi, Yan -- Qi, Qiuhui -- He, Dandan -- Huang, Haiyan -- Zhang, Xiaowei -- Wang, Zhiqiang -- Li, Wenjie -- Cao, Yuzhu -- Yu, Yingpu -- Yu, Hong -- Li, Jinhong -- Ye, Jiehua -- Chen, Huan -- Zhou, Yan -- Liu, Bin -- Wang, Jing -- Ye, Jia -- Ji, Hai -- Li, Shengting -- Ni, Peixiang -- Zhang, Jianguo -- Zhang, Yong -- Zheng, Hongkun -- Mao, Bingyu -- Wang, Wen -- Ye, Chen -- Li, Songgang -- Wang, Jian -- Wong, Gane Ka-Shu -- Yang, Huanming -- Biology Analysis Group -- 1 P50 HG02351/HG/NHGRI NIH HHS/ -- New York, N.Y. -- Science. 2004 Dec 10;306(5703):1937-40.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Southwest Agricultural University, Chongqing Beibei, 400716, China. xiaqy@swau.cq.cn〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15591204" target="_blank"〉PubMed〈/a〉
    Keywords: Algorithms ; Animals ; Anopheles/genetics ; Body Patterning/genetics ; Bombyx/*genetics/growth & development/metabolism ; Butterflies/genetics ; Computational Biology ; DNA Transposable Elements ; Drosophila melanogaster/genetics ; Exocrine Glands/metabolism ; Expressed Sequence Tags ; Female ; Genes, Homeobox ; *Genes, Insect ; *Genome ; Immunity, Innate/genetics ; Insect Hormones/genetics ; Insect Proteins/genetics ; Male ; Molecular Sequence Data ; *Sequence Analysis, DNA ; Sequence Homology, Nucleic Acid ; Sex Determination Processes ; Spiders/genetics ; Wings, Animal/growth & development
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 4
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    53BP1 is a reader of the DNA-damage-induced H2A Lys 15 ubiquitin mark (2013)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2013-06-14
    Description: 53BP1 (also called TP53BP1) is a chromatin-associated factor that promotes immunoglobulin class switching and DNA double-strand-break (DSB) repair by non-homologous end joining. To accomplish its function in DNA repair, 53BP1 accumulates at DSB sites downstream of the RNF168 ubiquitin ligase. How ubiquitin recruits 53BP1 to break sites remains unknown as its relocalization involves recognition of histone H4 Lys 20 (H4K20) methylation by its Tudor domain. Here we elucidate how vertebrate 53BP1 is recruited to the chromatin that flanks DSB sites. We show that 53BP1 recognizes mononucleosomes containing dimethylated H4K20 (H4K20me2) and H2A ubiquitinated on Lys 15 (H2AK15ub), the latter being a product of RNF168 action on chromatin. 53BP1 binds to nucleosomes minimally as a dimer using its previously characterized methyl-lysine-binding Tudor domain and a carboxy-terminal extension, termed the ubiquitination-dependent recruitment (UDR) motif, which interacts with the epitope formed by H2AK15ub and its surrounding residues on the H2A tail. 53BP1 is therefore a bivalent histone modification reader that recognizes a histone 'code' produced by DSB signalling.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3955401/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3955401/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fradet-Turcotte, Amelie -- Canny, Marella D -- Escribano-Diaz, Cristina -- Orthwein, Alexandre -- Leung, Charles C Y -- Huang, Hao -- Landry, Marie-Claude -- Kitevski-LeBlanc, Julianne -- Noordermeer, Sylvie M -- Sicheri, Frank -- Durocher, Daniel -- 84297-1/Canadian Institutes of Health Research/Canada -- 84297-2/Canadian Institutes of Health Research/Canada -- MOP84297/Canadian Institutes of Health Research/Canada -- England -- Nature. 2013 Jul 4;499(7456):50-4. doi: 10.1038/nature12318. Epub 2013 Jun 12.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Samuel Lunenfeld Research Institute, Mount Sinai Hospital, 600 University Avenue, Toronto, Ontario M5G 1X5, Canada.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23760478" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Motifs ; Amino Acid Sequence ; Animals ; Cell Cycle Proteins/chemistry/metabolism ; Cell Line ; Chromosomal Proteins, Non-Histone/chemistry/deficiency/genetics ; DNA Breaks, Double-Stranded ; *DNA Damage ; DNA-Binding Proteins/chemistry/deficiency/genetics ; Female ; Histones/*chemistry/*metabolism ; Humans ; Intracellular Signaling Peptides and ; Proteins/chemistry/deficiency/genetics/*metabolism ; Lysine/*metabolism ; Male ; Mice ; Molecular Sequence Data ; Mutant Proteins/chemistry/metabolism ; Nuclear Proteins/chemistry/metabolism ; Nucleosomes/chemistry/metabolism ; Protein Binding ; Protein Structure, Tertiary ; Schizosaccharomyces ; Schizosaccharomyces pombe Proteins/chemistry/metabolism ; Signal Transduction ; Ubiquitin/*metabolism ; *Ubiquitination
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 5
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    The linear ubiquitin-specific deubiquitinase gumby regulates angiogenesis (2013)
    Nature Publishing Group (NPG)
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    Publication Date: 2013-05-28
    Description: A complex interaction of signalling events, including the Wnt pathway, regulates sprouting of blood vessels from pre-existing vasculature during angiogenesis. Here we show that two distinct mutations in the (uro)chordate-specific gumby (also called Fam105b) gene cause an embryonic angiogenic phenotype in gumby mice. Gumby interacts with disheveled 2 (DVL2), is expressed in canonical Wnt-responsive endothelial cells and encodes an ovarian tumour domain class of deubiquitinase that specifically cleaves linear ubiquitin linkages. A crystal structure of gumby in complex with linear diubiquitin reveals how the identified mutations adversely affect substrate binding and catalytic function in line with the severity of their angiogenic phenotypes. Gumby interacts with HOIP (also called RNF31), a key component of the linear ubiquitin assembly complex, and decreases linear ubiquitination and activation of NF-kappaB-dependent transcription. This work provides support for the biological importance of linear (de)ubiquitination in angiogenesis, craniofacial and neural development and in modulating Wnt signalling.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rivkin, Elena -- Almeida, Stephanie M -- Ceccarelli, Derek F -- Juang, Yu-Chi -- MacLean, Teresa A -- Srikumar, Tharan -- Huang, Hao -- Dunham, Wade H -- Fukumura, Ryutaro -- Xie, Gang -- Gondo, Yoichi -- Raught, Brian -- Gingras, Anne-Claude -- Sicheri, Frank -- Cordes, Sabine P -- IHO 94384/Canadian Institutes of Health Research/Canada -- MOP 111199/Canadian Institutes of Health Research/Canada -- MOP 97966/Canadian Institutes of Health Research/Canada -- MOP119289/Canadian Institutes of Health Research/Canada -- England -- Nature. 2013 Jun 20;498(7454):318-24. doi: 10.1038/nature12296. Epub 2013 May 24.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Samuel Lunenfeld Research Institute, Mt Sinai Hospital, 600 University Avenue, Toronto, Ontario M5G 1X5, Canada.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23708998" target="_blank"〉PubMed〈/a〉
    Keywords: Adaptor Proteins, Signal Transducing/metabolism ; Alleles ; Amino Acid Sequence ; Animals ; Base Sequence ; Crystallography, X-Ray ; Embryo, Mammalian/blood supply/embryology/metabolism ; Endopeptidases/*chemistry/deficiency/genetics/*metabolism ; Female ; Gene Expression Profiling ; HEK293 Cells ; Humans ; Mice ; Models, Molecular ; Molecular Sequence Data ; *Neovascularization, Physiologic/genetics ; Phenotype ; Phosphoproteins/metabolism ; Protein Conformation ; Ubiquitin/*chemistry/*metabolism ; Ubiquitin-Protein Ligases/metabolism ; *Ubiquitination ; Wnt Signaling Pathway
    Print ISSN: 0028-0836
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    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 6
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    Crystal structure of a potassium ion transporter, TrkH (2011)
    Nature Publishing Group (NPG)
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    Publication Date: 2011-02-15
    Description: The TrkH/TrkG/KtrB proteins mediate K(+) uptake in bacteria and probably evolved from simple K(+) channels by multiple gene duplications or fusions. Here we present the crystal structure of a TrkH from Vibrio parahaemolyticus. TrkH is a homodimer, and each protomer contains an ion permeation pathway. A selectivity filter, similar in architecture to those of K(+) channels but significantly shorter, is lined by backbone and side-chain oxygen atoms. Functional studies showed that TrkH is selective for permeation of K(+) and Rb(+) over smaller ions such as Na(+) or Li(+). Immediately intracellular to the selectivity filter are an intramembrane loop and an arginine residue, both highly conserved, which constrict the permeation pathway. Substituting the arginine with an alanine significantly increases the rate of K(+) flux. These results reveal the molecular basis of K(+) selectivity and suggest a novel gating mechanism for this large and important family of membrane transport proteins.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3077569/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3077569/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cao, Yu -- Jin, Xiangshu -- Huang, Hua -- Derebe, Mehabaw Getahun -- Levin, Elena J -- Kabaleeswaran, Venkataraman -- Pan, Yaping -- Punta, Marco -- Love, James -- Weng, Jun -- Quick, Matthias -- Ye, Sheng -- Kloss, Brian -- Bruni, Renato -- Martinez-Hackert, Erik -- Hendrickson, Wayne A -- Rost, Burkhard -- Javitch, Jonathan A -- Rajashankar, Kanagalaghatta R -- Jiang, Youxing -- Zhou, Ming -- DK088057/DK/NIDDK NIH HHS/ -- GM05026/GM/NIGMS NIH HHS/ -- GM05026-SUB0007/GM/NIGMS NIH HHS/ -- HL086392/HL/NHLBI NIH HHS/ -- K05 DA022413/DA/NIDA NIH HHS/ -- P30 EB009998/EB/NIBIB NIH HHS/ -- R01 DK088057/DK/NIDDK NIH HHS/ -- R01 DK088057-01/DK/NIDDK NIH HHS/ -- R01 HL086392/HL/NHLBI NIH HHS/ -- R01 HL086392-05/HL/NHLBI NIH HHS/ -- Howard Hughes Medical Institute/ -- England -- Nature. 2011 Mar 17;471(7338):336-40. doi: 10.1038/nature09731. Epub 2011 Feb 13.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Physiology & Cellular Biophysics, College of Physicians and Surgeons, Columbia University, 630 West 168th Street, New York, New York 10032, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21317882" target="_blank"〉PubMed〈/a〉
    Keywords: ATP-Binding Cassette Transporters/chemistry ; Amino Acid Sequence ; Crystallography, X-Ray ; Escherichia coli Proteins/chemistry ; Ion Channel Gating ; Ion Transport ; Models, Molecular ; Molecular Sequence Data ; Potassium/metabolism ; Potassium Channels/*chemistry/*metabolism ; Structure-Activity Relationship ; Substrate Specificity ; Vibrio parahaemolyticus/*chemistry
    Print ISSN: 0028-0836
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    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 7
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    DAXX envelops a histone H3.3-H4 dimer for H3.3-specific recognition (2012)
    Nature Publishing Group (NPG)
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    Publication Date: 2012-10-19
    Description: Histone chaperones represent a structurally and functionally diverse family of histone-binding proteins that prevent promiscuous interactions of histones before their assembly into chromatin. DAXX is a metazoan histone chaperone specific to the evolutionarily conserved histone variant H3.3. Here we report the crystal structures of the DAXX histone-binding domain with a histone H3.3-H4 dimer, including mutants within DAXX and H3.3, together with in vitro and in vivo functional studies that elucidate the principles underlying H3.3 recognition specificity. Occupying 40% of the histone surface-accessible area, DAXX wraps around the H3.3-H4 dimer, with complex formation accompanied by structural transitions in the H3.3-H4 histone fold. DAXX uses an extended alpha-helical conformation to compete with major inter-histone, DNA and ASF1 interaction sites. Our structural studies identify recognition elements that read out H3.3-specific residues, and functional studies address the contributions of Gly 90 in H3.3 and Glu 225 in DAXX to chaperone-mediated H3.3 variant recognition specificity.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4056191/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4056191/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Elsasser, Simon J -- Huang, Hongda -- Lewis, Peter W -- Chin, Jason W -- Allis, C David -- Patel, Dinshaw J -- 1S10RR022321-01/RR/NCRR NIH HHS/ -- 1S10RR027037-01/RR/NCRR NIH HHS/ -- MC_U105181009/Medical Research Council/United Kingdom -- P30 EB009998/EB/NIBIB NIH HHS/ -- P30-EB-009998/EB/NIBIB NIH HHS/ -- S10 RR022321/RR/NCRR NIH HHS/ -- S10 RR027037/RR/NCRR NIH HHS/ -- U105181009/PHS HHS/ -- UD99999908/PHS HHS/ -- Medical Research Council/United Kingdom -- England -- Nature. 2012 Nov 22;491(7425):560-5. doi: 10.1038/nature11608. Epub 2012 Oct 17.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Chromatin Biology and Epigenetics, The Rockefeller University, New York, New York 10065, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23075851" target="_blank"〉PubMed〈/a〉
    Keywords: Adaptor Proteins, Signal Transducing/chemistry/metabolism ; Amino Acid Sequence ; Binding, Competitive ; Cell Cycle Proteins/genetics/metabolism ; Crystallography, X-Ray ; DNA/chemistry/*metabolism ; Histone Chaperones/chemistry/metabolism ; Histones/*chemistry/*metabolism ; Humans ; Models, Molecular ; Molecular Sequence Data ; Nuclear Proteins/chemistry/metabolism ; Nucleosomes/chemistry/metabolism ; Protein Conformation ; Protein Multimerization ; Substrate Specificity ; Water/chemistry/metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 8
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    Solution structure of a cisplatin-induced DNA interstrand cross-link (1995)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1995-12-15
    Description: The widely used antitumor drug cis-diamminedichloroplatinum(II) (cisplatin or cis-DDP) reacts with DNA, cross-linking two purine residues through the N7 atoms, which reside in the major groove in B-form DNA. The solution structure of the short duplex [d(CAT-AGCTATG)]2 cross-linked at the GC:GC site was determined by nuclear magnetic resonance (NMR). The deoxyguanosine-bridging cis-diammineplatinum(II) lies in the minor groove, and the complementary deoxycytidines are extrahelical. The double helix is locally reversed to a left-handed form, and the helix is unwound and bent toward the minor groove. These findings were independently confirmed by results from a phase-sensitive gel electrophoresis bending assay. The NMR structure differs markedly from previously proposed models but accounts for the chemical reactivity, the unwinding, and the bending of cis-DDP interstrand cross-linked DNA and may be important in the formation and repair of these cross-links in chromatin.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Huang, H -- Zhu, L -- Reid, B R -- Drobny, G P -- Hopkins, P B -- GM32681/GM/NIGMS NIH HHS/ -- GM45804/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1995 Dec 15;270(5243):1842-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Chemistry, University of Washington, Seattle 98195, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8525382" target="_blank"〉PubMed〈/a〉
    Keywords: Antineoplastic Agents/*pharmacology ; Base Sequence ; Cisplatin/*pharmacology ; DNA/*chemistry/drug effects ; Magnetic Resonance Spectroscopy ; Models, Molecular ; Molecular Sequence Data ; *Nucleic Acid Conformation ; Solutions
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  • 9
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    The structure of a human p110alpha/p85alpha complex elucidates the effects of oncogenic PI3Kalpha mutations (2007)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 2007-12-15
    Description: PIK3CA, one of the two most frequently mutated oncogenes in human tumors, codes for p110alpha, the catalytic subunit of a phosphatidylinositol 3-kinase, isoform alpha (PI3Kalpha, p110alpha/p85). Here, we report a 3.0 angstrom resolution structure of a complex between p110alpha and a polypeptide containing the p110alpha-binding domains of p85alpha, a protein required for its enzymatic activity. The structure shows that many of the mutations occur at residues lying at the interfaces between p110alpha and p85alpha or between the kinase domain of p110alpha and other domains within the catalytic subunit. Disruptions of these interactions are likely to affect the regulation of kinase activity by p85 or the catalytic activity of the enzyme, respectively. In addition to providing new insights about the structure of PI3Kalpha, these results suggest specific mechanisms for the effect of oncogenic mutations in p110alpha and p85alpha.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Huang, Chuan-Hsiang -- Mandelker, Diana -- Schmidt-Kittler, Oleg -- Samuels, Yardena -- Velculescu, Victor E -- Kinzler, Kenneth W -- Vogelstein, Bert -- Gabelli, Sandra B -- Amzel, L Mario -- CA 43460/CA/NCI NIH HHS/ -- GM 07184/GM/NIGMS NIH HHS/ -- GM066895/GM/NIGMS NIH HHS/ -- GM07309/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2007 Dec 14;318(5857):1744-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biophysics and Biophysical Chemistry, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18079394" target="_blank"〉PubMed〈/a〉
    Keywords: Adenosine Triphosphate ; Amino Acid Sequence ; Binding Sites ; Catalytic Domain ; Crystallography, X-Ray ; Humans ; Models, Molecular ; Molecular Sequence Data ; *Mutation ; Neoplasms/*genetics ; Phosphatidylinositol 3-Kinases/*chemistry/genetics/metabolism ; Protein Conformation ; Protein Folding ; Protein Structure, Secondary ; Protein Structure, Tertiary ; Protein Subunits/chemistry/genetics/metabolism ; src Homology Domains
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 10
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    A synthetic maternal-effect selfish genetic element drives population replacement in Drosophila (2007)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2007-03-31
    Description: One proposed strategy for controlling the transmission of insect-borne pathogens uses a drive mechanism to ensure the rapid spread of transgenes conferring disease refractoriness throughout wild populations. Here, we report the creation of maternal-effect selfish genetic elements in Drosophila that drive population replacement and are resistant to recombination-mediated dissociation of drive and disease refractoriness functions. These selfish elements use microRNA-mediated silencing of a maternally expressed gene essential for embryogenesis, which is coupled with early zygotic expression of a rescuing transgene.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Chen, Chun-Hong -- Huang, Haixia -- Ward, Catherine M -- Su, Jessica T -- Schaeffer, Lorian V -- Guo, Ming -- Hay, Bruce A -- GM057422/GM/NIGMS NIH HHS/ -- GM70956/GM/NIGMS NIH HHS/ -- NS042580/NS/NINDS NIH HHS/ -- NS048396/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 2007 Apr 27;316(5824):597-600. Epub 2007 Mar 29.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Biology, Mail Code 156-29, California Institute of Technology, Pasadena, CA 91125, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17395794" target="_blank"〉PubMed〈/a〉
    Keywords: Adaptor Proteins, Signal Transducing/*genetics/physiology ; Animals ; Antigens, Differentiation/*genetics/physiology ; Crosses, Genetic ; DNA Transposable Elements ; Drosophila/embryology/*genetics/*physiology ; Drosophila Proteins/*genetics/physiology ; Embryonic Development ; Female ; Gene Expression ; *Genes, Insect ; *Genetic Engineering ; Heterozygote ; Homozygote ; Male ; MicroRNAs/genetics ; Molecular Sequence Data ; *RNA Interference ; Receptors, Immunologic/*genetics/physiology ; Recombination, Genetic ; *Repetitive Sequences, Nucleic Acid ; Transgenes ; Zygote/physiology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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