Restrained least squares refinement of native (calcium) and cadmium-substituted carp parvalbumin using X-ray crystallographic data at 1.6-A resolution.Swain, A.L., Kretsinger, R.H., Amma, E.L.
(1989) J.Biol.Chem. 264: 16620-16628
- PubMed: 2777802
- Primary Citation of Related Structures:
- PubMed Abstract:
- Carp Muscle Calcium-Binding Protein, I.Characterization of the Tryptic Peptides and the Complete Amino Acid Sequence of Component B
Coffee, C.J.,Bradshaw, R.A.
(1973) J.Biol.Chem. 248: 3305
- The Coordination Polyhedron of Ca2+,Cd2+ in Parvalbumin
Swain, A.L.,Amma, E.L.
(1989) Inorg.Chim.Acta. 163: 5
- Carp Muscle Calcium-Binding Protein, III.Phase Refinement Using the Tangent Formula
Hendrickson, W.A.,Karle, J.
(1973) J.Biol.Chem. 248: 3327
- Troponin and Parvalbumin Calcium Binding Regions Predicted in Myosin Light Chain and T4 Lysozyme
Tufty, R.M.,Kretsinger, R.H.
(1975) Science 187: 167
- Structure of a Calcium Binding Carp Myogen
Nockolds, C.E.,Kretsinger, R.H.,Coffee, C.J.,Bradshaw, R.A.
(1972) Proc.Natl.Acad.Sci.USA 69: 581
- Gene Triplication Deduced from the Tertiary Structure of a Muscle Calcium Binding Protein
(1972) Nature New Biol. 240: 85
- Carp Muscle Calcium-Binding Protein, II.Structure Determination and General Description
Kretsinger, R.H.,Nockolds, C.E.
(1973) J.Biol.Chem. 248: 3313
- Calcium Binding Proteins and Natural Membranes
(1974) Perspectives in Membrane Biology --: 229
- The Structure of a Calcium-Binding Protein from Carp Muscle
Kretsinger, R.H.,Nockolds, C.E.,Coffee, C.J.,Bradshaw, R.A.
(1972) Cold Spring Harbor Symp.Quant.Biol. 36: 217
- Gene Duplication in Carp Muscle Calcium Binding Protein
(1972) Nature New Biol. 240: 83
- Terbium Replacement of Calcium in Carp Muscle Calcium-Binding Parvalbumin,an X-Ray Crystallographic Study
Moews, P.C.,Kretsinger, R.H.
(1975) J.Mol.Biol. 91: 229
- The Coordination of Calcium Ions by Carp Muscle Calcium-Binding Proteins A,B,and C
Coffee, C.J.,Bradshaw, R.A.,Kretsinger, R.H.
(1974) Adv.Exp.Med.Biol. 48: 211
- Refinement of the Structure of Carp Muscle Calcium-Binding Parvalbumin by Model Building and Difference Fourier Analysis
Moews, P.C.,Kretsinger, R.H.
(1975) J.Mol.Biol. 91: 201
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, includin ...
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.
Department of Chemistry, University of South Carolina, Columbia 29208.