Enzymatic properties of α-galactosidase from Trichoderma reesei in the hydrolysis of galactooligosaccharides. Shabalin, K.; Kulminskaya, A.; Savel'ev, A.; Shishlyannikov, S.; and Neustroev, K. Enzyme and Microbial Technology, 30(2):231-239, 2002. cited By 26
Enzymatic properties of α-galactosidase from Trichoderma reesei in the hydrolysis of galactooligosaccharides [link]Paper  doi  abstract   bibtex   
Enzymatic properties of the α-galactosidase (α-galactoside galactohydrolase, EC 3.2.1.22) from Trichoderma reesei in the hydrolysis of natural galactooligosaccharides and α-O-methyl D-galactopyranoside have been investigated in a wide range of substrate concentrations. The hydrolyses of α-O-methyl D-galactopyranoside and melibiose were inhibited by substrate at concentrations higher than 100 mM while in the hydrolysis of raffinose and stachyose such an effect was not observed. It was shown by 1H and 13C NMR spectroscopy and HPLC techniques that inhibition by the excess of α-O-methyl D-galactopyranoside or melibiose strongly correlated with formation of transglycosylation products. The product of autocondensation reaction with α-O-methyl D-galactopyranoside as substrate was found to be α-O-methyl galactopyranosyl-1,6-D-galactopyranoside. The stereochemical course of stachyose hydrolysis has been determined. The enzyme catalyses the hydrolysis with retention of anomeric configuration and is assumed to operate via a double displacement mechanism. Simultaneous hydrolysis of stachyose and raffinose effected by the α-D-galactosidase was studied by direct 1H NMR measurements. Cleavage of the terminal galactose residue of stachyose was found to be the rate-limiting step. Formation constants of enzyme-substrate complex for stachyose and raffinose were calculated. The suggested model can be used for simulating the two-substrate system and predicting the extent of stachyose hydrolysis. © 2002 Elsevier Science Inc. All rights reserved.
@ARTICLE{Shabalin2002231,
author={Shabalin, K.A. and Kulminskaya, A.A. and Savel'ev, A.N. and Shishlyannikov, S.M. and Neustroev, K.N.},
title={Enzymatic properties of α-galactosidase from Trichoderma reesei in the hydrolysis of galactooligosaccharides},
journal={Enzyme and Microbial Technology},
year={2002},
volume={30},
number={2},
pages={231-239},
doi={10.1016/S0141-0229(01)00482-3},
note={cited By 26},
url={https://www.scopus.com/inward/record.uri?eid=2-s2.0-0037074922&doi=10.1016%2fS0141-0229%2801%2900482-3&partnerID=40&md5=6f935b6c0dccc7b33e46c5b4635baff4},
affiliation={Molecular and Radiation Biophysics Division, Petersburg Nuclear Physics Institute, Gatchina, St.Petersburg, 188300, Russian Federation; St. Petersburg Technical University, Department of Biophysics, 29 Polytechnicheskaya str., St. Petersburg, 195251, Russian Federation},
abstract={Enzymatic properties of the α-galactosidase (α-galactoside galactohydrolase, EC 3.2.1.22) from Trichoderma reesei in the hydrolysis of natural galactooligosaccharides and α-O-methyl D-galactopyranoside have been investigated in a wide range of substrate concentrations. The hydrolyses of α-O-methyl D-galactopyranoside and melibiose were inhibited by substrate at concentrations higher than 100 mM while in the hydrolysis of raffinose and stachyose such an effect was not observed. It was shown by 1H and 13C NMR spectroscopy and HPLC techniques that inhibition by the excess of α-O-methyl D-galactopyranoside or melibiose strongly correlated with formation of transglycosylation products. The product of autocondensation reaction with α-O-methyl D-galactopyranoside as substrate was found to be α-O-methyl galactopyranosyl-1,6-D-galactopyranoside. The stereochemical course of stachyose hydrolysis has been determined. The enzyme catalyses the hydrolysis with retention of anomeric configuration and is assumed to operate via a double displacement mechanism. Simultaneous hydrolysis of stachyose and raffinose effected by the α-D-galactosidase was studied by direct 1H NMR measurements. Cleavage of the terminal galactose residue of stachyose was found to be the rate-limiting step. Formation constants of enzyme-substrate complex for stachyose and raffinose were calculated. The suggested model can be used for simulating the two-substrate system and predicting the extent of stachyose hydrolysis. © 2002 Elsevier Science Inc. All rights reserved.},
author_keywords={α-galactoside;  Stachyose;  Transglycosylation;  Trichoderma reesei},
}
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