1wb6: Difference between revisions
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==Overview== | ==Overview== | ||
Feruloyl esterases play a key role in the degradation of the intricate | 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. | ||
==About this Structure== | ==About this Structure== | ||
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[[Category: Endo-1,4-beta-xylanase]] | [[Category: Endo-1,4-beta-xylanase]] | ||
[[Category: Single protein]] | [[Category: Single protein]] | ||
[[Category: Davies, G | [[Category: Davies, G J.]] | ||
[[Category: Fontes, C.]] | [[Category: Fontes, C.]] | ||
[[Category: Prates, J | [[Category: Prates, J A.]] | ||
[[Category: Tarbouriech, N.]] | [[Category: Tarbouriech, N.]] | ||
[[Category: ACT]] | [[Category: ACT]] | ||
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[[Category: xylanase]] | [[Category: xylanase]] | ||
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 15:42:24 2008'' | ||
Revision as of 16:42, 21 February 2008
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S954A MUTANT OF THE FERULOYL ESTERASE MODULE FROM CLOSTRIDIUM THERMOCELLUM COMPLEXED WITH VANILLATE
OverviewOverview
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.
About this StructureAbout this Structure
1WB6 is a Single protein structure of sequence from Clostridium thermocellum with , , and as ligands. Active as Endo-1,4-beta-xylanase, with EC number 3.2.1.8 Known structural/functional Site: . Full crystallographic information is available from OCA.
ReferenceReference
Molecular determinants of substrate specificity in the feruloyl esterase module of xylanase 10B from Clostridium thermocellum., Tarbouriech N, Prates JA, Fontes CM, Davies GJ, Acta Crystallogr D Biol Crystallogr. 2005 Feb;61(Pt 2):194-7. Epub 2005, Jan 19. PMID:15681871
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