1qlg

From Proteopedia

Revision as of 13:56, 30 October 2007

CRYSTAL STRUCTURE OF PHYTASE WITH MAGNESIUM FROM BACILLUS AMYLOLIQUEFACIENS

Overview

Phytases hydrolyze phytic acid to less phosphorylated myo-inositol, derivatives and inorganic phosphate. A thermostable phytase is of great, value in applications for improving phosphate and metal ion availability, in animal feed, and thereby reducing phosphate pollution to the, environment. Here, we report a new folding architecture of a six-bladed, propeller for phosphatase activity revealed by the 2.1 A crystal, structures of a novel, thermostable phytase determined in both the, partially and fully Ca2+-loaded states. Binding of two calcium ions to, high-affinity calcium binding sites results in a dramatic increase in, thermostability (by as much as approximately 30 degrees C in melting, temperature) by joining loop segments remote in the amino acid sequence., Binding of three ... [(full description)]

About this Structure

1QLG is a [Single protein] structure of sequence from [Bacillus amyloliquefaciens] with CA and MG as [ligands]. Active as [3-phytase], with EC number [3.1.3.8]. Structure known Active Site: MG. Full crystallographic information is available from [OCA].

Reference

Crystal structures of a novel, thermostable phytase in partially and fully calcium-loaded states., Ha NC, Oh BC, Shin S, Kim HJ, Oh TK, Kim YO, Choi KY, Oh BH, Nat Struct Biol. 2000 Feb;7(2):147-53. PMID:10655618

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