1h8e

From Proteopedia

Revision as of 13:27, 30 October 2007

(ADP.ALF4)2(ADP.SO4) BOVINE F1-ATPASE (ALL THREE CATALYTIC SITES OCCUPIED)

Overview

The crystal structure of a novel aluminium fluoride inhibited form of, bovine mitochondrial F(1)-ATPase has been determined at 2 A resolution. In, contrast to all previously determined structures of the bovine enzyme, all, three catalytic sites are occupied by nucleotide. The subunit that did not, bind nucleotide in previous structures binds ADP and sulfate (mimicking, phosphate), and adopts a "half-closed" conformation. This structure, probably represents the posthydrolysis, pre-product release step on the, catalytic pathway. A catalytic scheme for hydrolysis (and synthesis) at, physiological rates and a mechanism for the ATP-driven rotation of the, gamma subunit are proposed based on the crystal structures of the bovine, enzyme.

About this Structure

1H8E is a [Protein complex] structure of sequences from [Bos taurus] with MG, ALF, SO4, ADP and GOL as [ligands]. Active as [Transferred entry: 3.6.3.14], with EC number [3.6.1.34]. Structure known Active Sites: AC1, AC2, AC3, AC4, AC5, AC6, AC7, AC8, AC9, BC1, BC2, BC3, BC4, BC5, BC6, CAT and PLP. Full crystallographic information is available from [OCA].

Reference

Structure of bovine mitochondrial F(1)-ATPase with nucleotide bound to all three catalytic sites: implications for the mechanism of rotary catalysis., Menz RI, Walker JE, Leslie AG, Cell. 2001 Aug 10;106(3):331-41. PMID:11509182

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