1m45: Difference between revisions
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|GENE= MLC1 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=4932 Saccharomyces cerevisiae]) | |GENE= MLC1 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=4932 Saccharomyces cerevisiae]) | ||
|DOMAIN= | |||
|RELATEDENTRY=[[1m46|1M46]] | |||
|RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1m45 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1m45 OCA], [http://www.ebi.ac.uk/pdbsum/1m45 PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1m45 RCSB]</span> | |||
}} | }} | ||
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[[Category: protein-peptide complex]] | [[Category: protein-peptide complex]] | ||
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Mar 30 22:10:57 2008'' | ||
Revision as of 22:10, 30 March 2008
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| , resolution 1.650Å | |||||||
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| Gene: | MLC1 (Saccharomyces cerevisiae) | ||||||
| Related: | 1M46
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| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
CRYSTAL STRUCTURE OF MLC1P BOUND TO IQ2 OF MYO2P, A CLASS V MYOSIN
OverviewOverview
IQ motifs are widespread in nature. Mlc1p is a calmodulin-like myosin light chain that binds to IQ motifs of a class V myosin, Myo2p, and an IQGAP-related protein, Iqg1p, playing a role in polarized growth and cytokinesis in Saccharomyces cerevisiae. The crystal structures of Mlc1p bound to IQ2 and IQ4 of Myo2p differ dramatically. When bound to IQ2, Mlc1p adopts a compact conformation in which both the N- and C-lobes interact with the IQ motif. However, in the complex with IQ4, the N-lobe no longer interacts with the IQ motif, resulting in an extended conformation of Mlc1p. The two light chain structures relate to two distinct subfamilies of IQ motifs, one of which does not interact with the N-lobes of calmodulin-like light chains. The correlation between light chain structure and IQ sequence is demonstrated further by sedimentation velocity analysis of complexes of Mlc1p with IQ motifs from Myo2p and Iqg1p. The resulting 'free' N-lobes of myosin light chains in the extended conformation could mediate the formation of ternary complexes during protein localization and/or partner recruitment.
About this StructureAbout this Structure
1M45 is a Protein complex structure of sequences from Saccharomyces cerevisiae. Full crystallographic information is available from OCA.
ReferenceReference
Two distinct myosin light chain structures are induced by specific variations within the bound IQ motifs-functional implications., Terrak M, Wu G, Stafford WF, Lu RC, Dominguez R, EMBO J. 2003 Feb 3;22(3):362-71. PMID:12554638
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