3nhn
From Proteopedia
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| - | + | ==Crystal structure of the SRC-family kinase HCK SH3-SH2-linker regulatory region== | |
| - | + | <StructureSection load='3nhn' size='340' side='right' caption='[[3nhn]], [[Resolution|resolution]] 2.61Å' scene=''> | |
| - | + | == Structural highlights == | |
| + | <table><tr><td colspan='2'>[[3nhn]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3NHN OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3NHN FirstGlance]. <br> | ||
| + | </td></tr><tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">HCK ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 Homo sapiens])</td></tr> | ||
| + | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Non-specific_protein-tyrosine_kinase Non-specific protein-tyrosine kinase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.7.10.2 2.7.10.2] </span></td></tr> | ||
| + | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3nhn FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3nhn OCA], [http://www.rcsb.org/pdb/explore.do?structureId=3nhn RCSB], [http://www.ebi.ac.uk/pdbsum/3nhn PDBsum]</span></td></tr> | ||
| + | </table> | ||
| + | == Disease == | ||
| + | [[http://www.uniprot.org/uniprot/HCK_HUMAN HCK_HUMAN]] Note=Aberrant activation of HCK by HIV-1 protein Nef enhances HIV-1 replication and contributes to HIV-1 pathogenicity.<ref>PMID:19114024</ref> <ref>PMID:20452982</ref> Note=Aberrant activation of HCK, e.g. by the BCR-ABL fusion protein, promotes cancer cell proliferation.<ref>PMID:19114024</ref> <ref>PMID:20452982</ref> | ||
| + | == Function == | ||
| + | [[http://www.uniprot.org/uniprot/HCK_HUMAN HCK_HUMAN]] Non-receptor tyrosine-protein kinase found in hematopoietic cells that transmits signals from cell surface receptors and plays an important role in the regulation of innate immune responses, including neutrophil, monocyte, macrophage and mast cell functions, phagocytosis, cell survival and proliferation, cell adhesion and migration. Acts downstream of receptors that bind the Fc region of immunoglobulins, such as FCGR1A and FCGR2A, but also CSF3R, PLAUR, the receptors for IFNG, IL2, IL6 and IL8, and integrins, such as ITGB1 and ITGB2. During the phagocytic process, mediates mobilization of secretory lysosomes, degranulation, and activation of NADPH oxidase to bring about the respiratory burst. Plays a role in the release of inflammatory molecules. Promotes reorganization of the actin cytoskeleton and actin polymerization, formation of podosomes and cell protrusions. Inhibits TP73-mediated transcription activation and TP73-mediated apoptosis. Phosphorylates CBL in response to activation of immunoglobulin gamma Fc region receptors. Phosphorylates ADAM15, BCR, ELMO1, FCGR2A, GAB1, GAB2, RAPGEF1, STAT5B, TP73, VAV1 and WAS.<ref>PMID:8132624</ref> <ref>PMID:7535819</ref> <ref>PMID:9406996</ref> <ref>PMID:9407116</ref> <ref>PMID:10092522</ref> <ref>PMID:10779760</ref> <ref>PMID:10973280</ref> <ref>PMID:12411494</ref> <ref>PMID:11741929</ref> <ref>PMID:11904303</ref> <ref>PMID:11896602</ref> <ref>PMID:15010462</ref> <ref>PMID:15952790</ref> <ref>PMID:15998323</ref> <ref>PMID:17535448</ref> <ref>PMID:17310994</ref> <ref>PMID:19114024</ref> <ref>PMID:19903482</ref> <ref>PMID:20452982</ref> | ||
| + | == Evolutionary Conservation == | ||
| + | [[Image:Consurf_key_small.gif|200px|right]] | ||
| + | Check<jmol> | ||
| + | <jmolCheckbox> | ||
| + | <scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/nh/3nhn_consurf.spt"</scriptWhenChecked> | ||
| + | <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked> | ||
| + | <text>to colour the structure by Evolutionary Conservation</text> | ||
| + | </jmolCheckbox> | ||
| + | </jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/chain_selection.php?pdb_ID=2ata ConSurf]. | ||
| + | <div style="clear:both"></div> | ||
| + | <div style="background-color:#fffaf0;"> | ||
| + | == Publication Abstract from PubMed == | ||
| + | Most mammalian cell types depend on multiple Src-family kinases (SFKs) to regulate diverse signaling pathways. Strict control of SFK activity is essential to normal cellular function and loss of kinase regulation contributes to several forms of cancer and other diseases. Previous X-ray crystal structures of the SFKs c-Src and Hck revealed that intramolecular association of their SH3 domains and SH2-kinase linker regions has a key role in downregulation of kinase activity. However, the amino acid sequence of the Hck linker represents a suboptimal ligand for the isolated SH3 domain, suggesting that it may form the PPII helical conformation required for SH3 docking only in the context of the intact structure. To test this hypothesis directly, we determined the crystal structure of a truncated Hck protein consisting of the SH2 and SH3 domains plus the linker. Despite the absence of the kinase domain, the structures and relative orientations of the SH2 and SH3 domains in this shorter protein were very similar to those observed in near-full-length, downregulated Hck. However, the SH2-kinase linker adopted a modified topology and failed to engage the SH3 domain. This new structure supports the idea that these non-catalytic regions work together as a ''conformational switch'' that modulates kinase activity in a manner unique to the SH3 domain and linker topologies present in the intact Hck protein. Our results also provide fresh structural insight into the facile induction of Hck activity by HIV-1 Nef and other Hck SH3-domain binding proteins, and implicate the existence of innate conformational states unique to individual Src-family members that ''fine-tune'' their sensitivities to activation by SH3-based ligands. | ||
| - | + | Crystal structure of the Src-family kinase Hck SH3-SH2-linker regulatory region supports an SH3-dominant activation mechanism.,Alvarado JJ, Betts L, Moroco JA, Smithgall TE, Yeh JI J Biol Chem. 2010 Sep 1. PMID:20810664<ref>PMID:20810664</ref> | |
| - | + | ||
| - | + | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |
| - | + | </div> | |
| - | == | + | ==See Also== |
| - | [[ | + | *[[Tyrosine kinase|Tyrosine kinase]] |
| - | + | == References == | |
| - | == | + | <references/> |
| - | + | __TOC__ | |
| + | </StructureSection> | ||
[[Category: Homo sapiens]] | [[Category: Homo sapiens]] | ||
[[Category: Non-specific protein-tyrosine kinase]] | [[Category: Non-specific protein-tyrosine kinase]] | ||
| - | [[Category: Alvarado, J J | + | [[Category: Alvarado, J J]] |
| - | [[Category: Betts, L | + | [[Category: Betts, L]] |
| - | [[Category: Moroco, J A | + | [[Category: Moroco, J A]] |
| - | [[Category: Smithgall, T E | + | [[Category: Smithgall, T E]] |
| - | [[Category: Yeh, J I | + | [[Category: Yeh, J I]] |
[[Category: Hck]] | [[Category: Hck]] | ||
[[Category: Sfk]] | [[Category: Sfk]] | ||
Revision as of 16:13, 18 December 2014
Crystal structure of the SRC-family kinase HCK SH3-SH2-linker regulatory region
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