1DMS

STRUCTURE OF DMSO REDUCTASE

1DMS の概要

• エントリーDOI: 10.2210/pdb1dms/pdb
• 分子名称: DMSO REDUCTASE, 2-AMINO-5,6-DIMERCAPTO-7-METHYL-3,7,8A,9-TETRAHYDRO-8-OXA-1,3,9,10-TETRAAZA-ANTHRACEN-4-ONE GUANOSINE DINUCLEOTIDE, MOLYBDENUM (IV)OXIDE, ... (4 entities in total)
• 機能のキーワード: dmso reductase, molydopterin, reductase
• 由来する生物種: Rhodobacter capsulatus
• タンパク質・核酸の鎖数: 1
• 化学式量合計: 86685.89

構造登録者

Schneider, F.,Loewe, J.,Huber, R.,Schindelin, H.,Kisker, C.,Knaeblein, J. (登録日: 1996-09-03, 公開日: 1998-07-01, 最終更新日: 2024-02-07)

主引用文献

Schneider, F.,Lowe, J.,Huber, R.,Schindelin, H.,Kisker, C.,Knablein, J.
Crystal structure of dimethyl sulfoxide reductase from Rhodobacter capsulatus at 1.88 A resolution.
J.Mol.Biol., 263:53-69, 1996

PubMed Abstract: The periplasmic dimethyl sulfoxide reductase (DMSOR) from the photosynthetic purple bacterium Rhodobacter capsulatus functions as the terminal electron acceptor in its respiratory chain. The enzyme catalyzes the reduction of highly oxidized substrates like dimethyl sulfoxide to dimethyl sulfide. At a molybdenum redox center, two single electrons are transferred from cytochrome C556 to the substrate dimethyl sulfoxide, generating dimethyl sulfide and (with two protons) water. The enzyme was purified and crystallized in space group P4(1)2(1)2 with unit cell dimensions of a = b = 80.7 A and c = 229.2 A. The crystals diffract beyond 1.8 A with synchrotron radiation. The three-dimensional structure was solved by a combination of multiple isomorphous replacement and molecular replacement techniques. The atomic model was refined to an R-factor of 0.169 for 57,394 independent reflections. The spherical protein consists of four domains with a funnel-like cavity that leads to the freely accessible metal-ion redox center. The bis(molybdopterin guanine dinucleotide) molybdenum cofactor (1541 Da) of the single chain protein (85,033 Da) has the molybdenum ion bound to the cis-dithiolene group of only one molybdopterin guanine dinucleotide molecule. Three additional ligands, two oxo groups and the oxygen of a serine side-chain, are bound to the molybdenum ion. The second molybdopterin system is not part of the ligand sphere of the metal center with its sulfur atoms at distances of 3.5 A and 3.8 A away. It might be involved in electron shuttling from the protein surface to the molybdenum center.

PubMed: 8890912
DOI: 10.1006/jmbi.1996.0555

実験手法

X-RAY DIFFRACTION (1.88 Å)