3A52 image
Deposition Date 2009-07-24
Release Date 2010-04-14
Last Version Date 2024-03-13
Entry Detail
PDB ID:
3A52
Keywords:
Title:
Crystal structure of cold-active alkailne phosphatase from psychrophile Shewanella sp.
Biological Source:
Source Organism:
Shewanella (Taxon ID: 177958)
Host Organism:
Method Details:
Experimental Method:
Resolution:
2.20 Å
R-Value Free:
0.24
R-Value Work:
0.18
Space Group:
P 1 21 1
Macromolecular Entities
Polymer Type:polypeptide(L)
Molecule:Cold-active alkaline phosphatase
Gene (Uniprot):scap
Chain IDs:A, B
Chain Length:400
Number of Molecules:2
Biological Source:Shewanella
Primary Citation
Crystal structure of cold-active alkaline phosphatase from the psychrophile Shewanella sp.
Biosci.Biotechnol.Biochem. 74 69 74 (2010)
PMID: 20057143 DOI: 10.1271/bbb.90563

Abstact

The crystal structure of a cold-active alkaline phosphatase from a psychrophile, Shewanella sp. (SCAP), was solved at 2.2 A. A refined model showed a homodimer with six metal-ligand sites. The arrangement of the catalytic residues resembled those of alkaline phosphatases (APs), suggesting that the reaction mechanism of SCAP was fundamentally identical to those of other APs. SCAP had two distinct structural features: (i) a loop with Arg122 that bound to the phosphate moiety of the substrate suffered no constraints from the linkage to other secondary structures, and (ii) Mg3-ligand His109 was considered to undergo repulsive effect with neighboring Trp228. The local flexibility led by these features might be an important factor in the high catalytic efficiency of SCAP at low temperatures.

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Primary Citation of related structures