1WB4

S954A mutant of the feruloyl esterase module from clostridium thermocellum complexed with sinapinate

1WB4 の概要

• エントリーDOI: 10.2210/pdb1wb4/pdb
• 関連するPDBエントリー: 1DYO 1GKK 1GKL 1H6X 1H6Y 1OHZ 1WB5 1WB6
• 分子名称: ENDO-1,4-BETA-XYLANASE Y, SINAPINATE, GLYCEROL, ... (6 entities in total)
• 機能のキーワード: esterase family 1, ferulic acid, glycosidase, hydrolase, xylan degradation, xylanase
• 由来する生物種: CLOSTRIDIUM THERMOCELLUM
• タンパク質・核酸の鎖数: 2
• 化学式量合計: 70641.56

構造登録者

Tarbouriech, N.,Prates, J.A.,Fontes, C.,Davies, G.J. (登録日: 2004-10-30, 公開日: 2005-02-02, 最終更新日: 2023-12-13)

主引用文献

Tarbouriech, N.,Prates, J.A.,Fontes, C.,Davies, G.J.
Molecular Determinants of Substrate Specificity in the Feruloyl Esterase Module of Xylanase 10B from Clostridium Thermocellum
Acta Crystallogr.,Sect.D, 61:194-, 2005

PubMed Abstract: Feruloyl esterases play a key role in the degradation of the intricate structure of the plant cell wall by hydrolysing the ferulate ester groups involved in the cross-linking between hemicelluloses and between hemicellulose and lignin. The structure of the feruloyl esterase module of Clostridium thermocellum cellulosomal xylanase 10B has been reported previously. It displays the alpha/beta hydrolase fold with a classical Ser-His-Asp catalytic triad. Here, the structures of a Ser-Ala mutant of this feruloyl esterase in complexes with methyl syringate, methyl sinapinate and methyl vanillate are described. Substrate binding is accompanied by subtle conformational changes at amino acids Trp982, Met955, Asn1023 and Ile1019 in the ligand-binding cavity. The structural determinants, particularly the m-methoxy substituent, governing the substrate specificity of Xyn10B feruloyl esterase are rationalized.

PubMed: 15681871
DOI: 10.1107/S0907444904029695

実験手法

X-RAY DIFFRACTION (1.4 Å)