ISDA: 1AJ5

Deposition Date 1997-05-15

Release Date 1998-05-20

Last Version Date 2024-02-07

Entry Detail

PDB ID:

1AJ5

Keywords:

CALCIUM-BINDING PROTEIN

Title:

CALPAIN DOMAIN VI APO

Biological Source:

Source Organism:

Rattus norvegicus (Taxon ID: 10116)

Host Organism:

Escherichia coli BL21(DE3)

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

2.30 Å

R-Value Free:

0.30

R-Value Work:

0.22

R-Value Observed:

0.22

Space Group:

C 2 2 21

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Macromolecular Entities

Structures with similar UniProt ID

Protein Blast

Polymer Type:polypeptide(L)
Molecule:CALPAIN
Gene (Uniprot):Capns1
Chain IDs:A, B
Chain Length:173
Number of Molecules:2
Biological Source:Rattus norvegicus

UniProt ID:Q64537 Pfam ID:PF13833 EC:3.4.22.B24

Primary Citation

Structure of a calpain Ca(2+)-binding domain reveals a novel EF-hand and Ca(2+)-induced conformational changes.

Blanchard, H, Grochulski, P, Li, Y, Arthur, J.S, Davies, P.L, Elce, J.S, Cygler, M, Blanchard, H, Li, Y, Cygler, M, Kay, C.M, Arthur, J.S, Davies, P.L, Elce, J.S, Graham-Siegenthaler, K, Gauthier, S, Davies, P.L, Elce, J.S.Show

Nat.Struct.Biol. 4 532 538 (1997)

PMID: 9228945 DOI: 10.1038/nsb0797-532

Abstact

The crystal structure of a Ca(2+)-binding domain (dVI) of rat m-calpain has been determined at 2.3 A resolution, both with and without bound Ca2+. The structures reveal a unique fold incorporating five EF-hand motifs per monomer, three of which bind calcium at physiological calcium concentrations, with one showing a novel EF-hand coordination pattern. This investigation gives us a first view of the calcium-induced conformational changes, and consequently an insight into the mechanism of calcium induced activation in calpain. The crystal structures reveal a dVI homodimer which provides a preliminary model for the subunit dimerization in calpain.

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Primary Citation of related structures

Abstact

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