1cdp: Difference between revisions
No edit summary |
No edit summary |
||
| Line 4: | Line 4: | ||
|PDB= 1cdp |SIZE=350|CAPTION= <scene name='initialview01'>1cdp</scene>, resolution 1.6Å | |PDB= 1cdp |SIZE=350|CAPTION= <scene name='initialview01'>1cdp</scene>, resolution 1.6Å | ||
|SITE= | |SITE= | ||
|LIGAND= <scene name='pdbligand= | |LIGAND= <scene name='pdbligand=ACE:ACETYL+GROUP'>ACE</scene>, <scene name='pdbligand=CD:CADMIUM+ION'>CD</scene> | ||
|ACTIVITY= | |ACTIVITY= | ||
|GENE= | |GENE= | ||
|DOMAIN= | |||
|RELATEDENTRY= | |||
|RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1cdp FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1cdp OCA], [http://www.ebi.ac.uk/pdbsum/1cdp PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1cdp RCSB]</span> | |||
}} | }} | ||
| Line 25: | Line 28: | ||
[[Category: Kretsinger, R H.]] | [[Category: Kretsinger, R H.]] | ||
[[Category: Swain, A L.]] | [[Category: Swain, A L.]] | ||
[[Category: calcium binding]] | [[Category: calcium binding]] | ||
''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 19:19:38 2008'' | ||
Revision as of 19:19, 30 March 2008
| |||||||
| , resolution 1.6Å | |||||||
|---|---|---|---|---|---|---|---|
| Ligands: | , | ||||||
| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
RESTRAINED LEAST SQUARES REFINEMENT OF NATIVE (CALCIUM) AND CADMIUM-SUBSTITUTED CARP PARVALBUMIN USING X-RAY CRYSTALLOGRAPHIC DATA AT 1.6-ANGSTROMS RESOLUTION
OverviewOverview
Carp parvalbumin coordinates calcium through one carbonyl oxygen atom and the oxygen-containing side chains of 5 amino acid residues, or 4 residues and a water molecule, in a helix-loop-helix structural motif. Other calcium-binding proteins, including calmodulin and troponin C, also possess this unique calcium-binding design, which is designated EF-hand or calmodulin fold. Parvalbumin has two such sites, labeled CD and EF. Each of the calcium-binding sites of refined structures of proteins belonging to this group has a 7-oxygen coordination sphere except those of the structure of parvalbumin as it was reported in 1975. This structure had been refined at 1.9 A using difference Fourier techniques on film data. The CD site appeared to be 6-coordinate and the EF site 8-coordinate. Results of NMR experiments using 113Cd-substituted parvalbumin, however, indicate that the sites are similar to one another with coordination number greater than 6. To resolve the inconsistency between crystallographic and NMR results, 1.6 A area detector data was collected for native and cadmium-substituted parvalbumin; the structures have been refined to R factors of 18.7% and 16.4%, respectively, with acceptable geometry and low errors in atomic coordinates. Differences between the parvalbumin structure described in 1975 and the present structure are addressed, including the discovery of 7-coordination for both the CD and EF sites.
About this StructureAbout this Structure
1CDP is a Single protein structure of sequence from Cyprinus carpio. Full crystallographic information is available from OCA.
ReferenceReference
Restrained least squares refinement of native (calcium) and cadmium-substituted carp parvalbumin using X-ray crystallographic data at 1.6-A resolution., Swain AL, Kretsinger RH, Amma EL, J Biol Chem. 1989 Oct 5;264(28):16620-8. PMID:2777802
Page seeded by OCA on Sun Mar 30 19:19:38 2008