4lzx: Difference between revisions
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==Complex of IQCG and Ca2+-free CaM== | ==Complex of IQCG and Ca2+-free CaM== | ||
<StructureSection load='4lzx' size='340' side='right' caption='[[4lzx]], [[Resolution|resolution]] 1.50Å' scene=''> | <StructureSection load='4lzx' size='340' side='right'caption='[[4lzx]], [[Resolution|resolution]] 1.50Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[4lzx]] is a 2 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4LZX OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4LZX FirstGlance]. <br> | <table><tr><td colspan='2'>[[4lzx]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Human Human]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4LZX OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4LZX FirstGlance]. <br> | ||
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr> | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr> | ||
<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[4m1l|4m1l]]</td></tr> | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[4m1l|4m1l]]</td></tr> | ||
<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">CALM1, CALM, CAM, CAM1, CALM2, CAM2, CAMB, CALM3, CALML2, CAM3, CAMC, CAMIII ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 HUMAN]), IQCG ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 HUMAN])</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=4lzx FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4lzx OCA], [http://pdbe.org/4lzx PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4lzx RCSB], [http://www.ebi.ac.uk/pdbsum/4lzx PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=4lzx ProSAT]</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=4lzx FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4lzx OCA], [http://pdbe.org/4lzx PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4lzx RCSB], [http://www.ebi.ac.uk/pdbsum/4lzx PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=4lzx ProSAT]</span></td></tr> | ||
</table> | </table> | ||
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__TOC__ | __TOC__ | ||
</StructureSection> | </StructureSection> | ||
[[Category: Human]] | |||
[[Category: Large Structures]] | |||
[[Category: Chen, L T]] | [[Category: Chen, L T]] | ||
[[Category: Chen, S]] | [[Category: Chen, S]] | ||
Revision as of 11:34, 3 April 2019
Complex of IQCG and Ca2+-free CaMComplex of IQCG and Ca2+-free CaM
Structural highlights
Publication Abstract from PubMedWe previously reported a fusion protein NUP98-IQCG in an acute leukaemia, which functions as an aberrant regulator of transcriptional expression, yet the structure and function of IQCG have not been characterized. Here we use zebrafish to investigate the role of iqcg in haematopoietic development, and find that the numbers of haematopoietic stem cells and multilineage-differentiated cells are reduced in iqcg-deficient embryos. Mechanistically, IQCG binds to calmodulin (CaM) and acts as a molecule upstream of CaM-dependent kinase IV (CaMKIV). Crystal structures of complexes between CaM and IQ domain of IQCG reveal dual CaM-binding footprints in this motif, and provide a structural basis for a higher CaM-IQCG affinity when deprived of calcium. The results collectively allow us to understand IQCG-mediated calcium signalling in haematopoiesis, and propose a model in which IQCG stores CaM at low cytoplasmic calcium concentrations, and releases CaM to activate CaMKIV when calcium level rises. Functional and molecular features of the calmodulin-interacting protein IQCG required for haematopoiesis in zebrafish.,Chen LT, Liang WX, Chen S, Li RK, Tan JL, Xu PF, Luo LF, Wang L, Yu SH, Meng G, Li KK, Liu TX, Chen Z, Chen SJ Nat Commun. 2014 May 2;5:3811. doi: 10.1038/ncomms4811. PMID:24787902[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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