1Z69

Crystal structure of methylenetetrahydromethanopterin reductase (Mer) in complex with coenzyme F420

1Z69 の概要

• エントリーDOI: 10.2210/pdb1z69/pdb
• 関連するPDBエントリー: 1EZW 1F07
• 分子名称: Coenzyme F420-dependent N(5),N(10)-methylenetetrahydromethanopterin reductase, COENZYME F420, CHLORIDE ION, ... (5 entities in total)
• 機能のキーワード: (alpha, beta)8 barrel, oxidoreductase
• 由来する生物種: Methanosarcina barkeri
• タンパク質・核酸の鎖数: 4
• 化学式量合計: 141425.33

構造登録者

Aufhammer, S.W.,Warkentin, E.,Ermler, U.,Hagemeier, C.H.,Thauer, R.K.,Shima, S. (登録日: 2005-03-22, 公開日: 2005-06-21, 最終更新日: 2023-08-23)

主引用文献

Aufhammer, S.W.,Warkentin, E.,Ermler, U.,Hagemeier, C.H.,Thauer, R.K.,Shima, S.
Crystal structure of methylenetetrahydromethanopterin reductase (Mer) in complex with coenzyme F420: Architecture of the F420/FMN binding site of enzymes within the nonprolyl cis-peptide containing bacterial luciferase family
Protein Sci., 14:1840-1849, 2005

PubMed Abstract: Methylenetetratetrahydromethanopterin reductase (Mer) is involved in CO(2) reduction to methane in methanogenic archaea and catalyses the reversible reduction of methylenetetrahydromethanopterin (methylene-H(4)MPT) to methyl-H(4)MPT with coenzyme F(420)H(2), which is a reduced 5'-deazaflavin. Mer was recently established as a TIM barrel structure containing a nonprolyl cis-peptide bond but the binding site of the substrates remained elusive. We report here on the crystal structure of Mer in complex with F(420) at 2.6 A resolution. The isoalloxazine ring is present in a pronounced butterfly conformation, being induced from the Re-face of F(420) by a bulge that contains the non-prolyl cis-peptide bond. The bindingmode of F(420) is very similar to that in F(420)-dependent alcohol dehydrogenase Adf despite the low sequence identity of 21%. Moreover, binding of F(420) to the apoenzyme was only associated with minor conformational changes of the polypeptide chain. These findings allowed us to build an improved model of FMN into its binding site in bacterial luciferase, which belongs to the same structural family as Mer and Adf and also contains a nonprolyl cis-peptide bond in an equivalent position.

PubMed: 15937276
DOI: 10.1110/ps.041289805

実験手法

X-RAY DIFFRACTION (2.61 Å)