Abstract
Sequence analysis of β-1,3-xylanase (TxyA) from a marine bacterium, Alcaligenes sp. strain XY-234 implied that an xylan-binding module belonging to carbohydrate-binding module family 31 (TxyA-CBM) is separated from a catalytic module belonging to glycosyl hydrolase family 26 (TxyA-CM) by a putative glycine-rich linker [Okazaki, F., et al. (2002) J. Bacteriol. 184: 2399–2403]. In order to reveal the role of these structural features of TxyA, two modules, TxyA-CBM and TxyA-CM, were constructed, and those modules and full-length TxyA were characterized by thermodynamic studies. TxyA-CBM and TxyA-CM showed full reversible folding from denaturant-induced unfolded forms, exhibited higher thermodynamic stabilities. The conformational stability of both truncated modules is industrially desirable, as well as aiding the understanding of the enzymatic characterization of the two modules of β-1,3-xylanase separated by a long linker.
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Abbreviations
- CBM:
-
carbohydrate-binding module
- CM:
-
catalytic module
- Gdn-HCl:
-
guanidine hydrochloride
- TX:
-
β-1,3-xylan
- TxyA:
-
β-1,3-xylanase from a marine bacterium, Alcaligenes sp. strain XY-234.
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Okazaki, F., Shiraki, K., Tamaru, Y. et al. The First Thermodynamic Characterization of β-1,3-Xylanase from a Marine Bacterium. Protein J 24, 413–421 (2005). https://doi.org/10.1007/s10930-005-7637-8
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DOI: https://doi.org/10.1007/s10930-005-7637-8