5H6B

Crystal structure of a thermostable lipase from Marine Streptomyces

5H6B の概要

• エントリーDOI: 10.2210/pdb5h6b/pdb
• 関連するPDBエントリー: 5H6G
• 分子名称: Putative secreted lipase, ZINC ION, ACETATE ION, ... (5 entities in total)
• 機能のキーワード: lipase, thermostability, marine, hydrolase
• 由来する生物種: Streptomyces sp. W007
• タンパク質・核酸の鎖数: 1
• 化学式量合計: 28579.69

構造登録者

Hou, S.,Zhao, Z.,Liu, J. (登録日: 2016-11-11, 公開日: 2017-09-20, 最終更新日: 2024-11-20)

主引用文献

Zhao, Z.,Hou, S.,Lan, D.,Wang, X.,Liu, J.,Khan, F.I.,Wang, Y.
Crystal structure of a lipase from Streptomyces sp. strain W007 - implications for thermostability and regiospecificity
FEBS J., 284:3506-3519, 2017

PubMed Abstract: MAS1 from marine Streptomyces sp. strain W007 belongs to the bacterial lipase I.7 subfamily and is characterized as a thermostable and nonregiospecific lipase. To shed light on the catalytic mechanism of MAS1, we determined its crystal structure with closed conformation in two crystal forms at 2.3 Å resolution. MAS1 adopts the canonical α/β hydrolase core fold with its catalytic triad being formed by S109, D200 and H232. Structural analysis and biochemical assays revealed that disulfide bonds and salt bridges play a vital role in the thermostability of MAS1. In addition, we discovered that the replacement of H108 with a tryptophan converts MAS1 from a nonregiospecific to an sn-1,3-specific lipase, suggesting the functional importance of the second position from the conserved pentapeptide motif in defining the regiospecificity of MAS1. Our present study provides insights into the molecular basis for the thermostability and regiospecificity of MAS1, and it may aid in the rational design of thermostable or regiospecific lipases for potential industrial applications.

PubMed: 28857479
DOI: 10.1111/febs.14211

実験手法

X-RAY DIFFRACTION (2.3 Å)