1n41: Difference between revisions
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|PDB= 1n41 |SIZE=350|CAPTION= <scene name='initialview01'>1n41</scene>, resolution 2.1Å | |PDB= 1n41 |SIZE=350|CAPTION= <scene name='initialview01'>1n41</scene>, resolution 2.1Å | ||
|SITE= | |SITE= | ||
|LIGAND= <scene name='pdbligand=CA:CALCIUM+ION'>CA</scene> | |LIGAND= <scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene> | ||
|ACTIVITY= | |ACTIVITY= | ||
|GENE= | |GENE= | ||
|DOMAIN= | |||
|RELATEDENTRY= | |||
|RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1n41 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1n41 OCA], [http://www.ebi.ac.uk/pdbsum/1n41 PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1n41 RCSB]</span> | |||
}} | }} | ||
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[[Category: Mo, Y D.]] | [[Category: Mo, Y D.]] | ||
[[Category: Seaton, B A.]] | [[Category: Seaton, B A.]] | ||
[[Category: calcium]] | [[Category: calcium]] | ||
[[Category: phospholipid membrane binding protein]] | [[Category: phospholipid membrane binding protein]] | ||
''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 22:25:03 2008'' | ||
Revision as of 22:25, 30 March 2008
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| , resolution 2.1Å | |||||||
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| Ligands: | , | ||||||
| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
Crystal Structure of Annexin V K27E Mutant
OverviewOverview
Annexin V is an abundant eukaryotic protein that binds phospholipid membranes in a Ca(2+)-dependent manner. In the present studies, site-directed mutagenesis was combined with x-ray crystallography and solution liposome binding assays to probe the functional role of a cluster of interfacial basic residues in annexin V. Four mutants were investigated: R23E, K27E, R61E, and R149E. All four mutants exhibited a significant reduction in adsorption to phospholipid membranes relative to the wild-type protein, and the R23E mutation was the most deleterious. Crystal structures of wild-type and mutant proteins were similar except for local changes in salt bridges involving basic cluster residues. The combined data indicate that Arg(23) is a major determinant for interfacial phospholipid binding and participates in an intermolecular salt bridge that is key for trimer formation on the membrane surface. Together, crystallographic and solution data provide evidence that the interfacial basic cluster is a locus where trimerization is synergistically coupled to membrane phospholipid binding.
About this StructureAbout this Structure
1N41 is a Single protein structure of sequence from Rattus norvegicus. Full crystallographic information is available from OCA.
ReferenceReference
Interfacial basic cluster in annexin V couples phospholipid binding and trimer formation on membrane surfaces., Mo Y, Campos B, Mealy TR, Commodore L, Head JF, Dedman JR, Seaton BA, J Biol Chem. 2003 Jan 24;278(4):2437-43. Epub 2002 Oct 24. PMID:12401794
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