1f8s

From Proteopedia

---

Revision as of 12:35, 20 November 2007

proteopedia linkproteopedia link

spinqualitylabelsall models 1f8s, resolution 2.00Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image

CRYSTAL STRUCTURE OF L-AMINO ACID OXIDASE FROM CALLOSELASMA RHODOSTOMA, COMPLEXED WITH THREE MOLECULES OF O-AMINOBENZOATE.

Overview

The structure of L-amino acid oxidase (LAAO) from Calloselasma rhodostoma, has been determined to 2.0 A resolution in the presence of two ligands:, citrate and o-aminobenzoate (AB). The protomer consists of three domains:, an FAD-binding domain, a substrate-binding domain and a helical domain., The interface between the substrate-binding and helical domains forms a 25, A long funnel, which provides access to the active site. Three AB, molecules are visible within the funnel of the LAAO-AB complex; their, orientations suggest the trajectory of the substrate to the active site., The innermost AB molecule makes hydrogen bond contacts with the active, site residues, Arg90 and Gly464, and the aromatic portion of the ligand is, situated in a hydrophobic pocket. These contacts are proposed to mimic, those of the natural substrate. Comparison of LAAO with the structure of, mammalian D-amino acid oxidase reveals significant differences in their, modes of substrate entry. Furthermore, a mirror-symmetrical relationship, between the two substrate-binding sites is observed which facilitates, enantiomeric selectivity while preserving a common arrangement of the, atoms involved in catalysis.

About this Structure

1F8S is a Single protein structure of sequence from Calloselasma rhodostoma with NAG, BE2 and FAD as ligands. Active as L-amino-acid oxidase, with EC number 1.4.3.2 Full crystallographic information is available from OCA.

Reference

The structure of L-amino acid oxidase reveals the substrate trajectory into an enantiomerically conserved active site., Pawelek PD, Cheah J, Coulombe R, Macheroux P, Ghisla S, Vrielink A, EMBO J. 2000 Aug 15;19(16):4204-15. PMID:10944103

Page seeded by OCA on Tue Nov 20 14:42:50 2007