Title

Comparison of glycosylation patterns of phytase from Aspergillus niger(A. Ficuum) NRRL 3135 and recombinant phytase

Authors

Authors

T. Panchal;R. J. Wodzinski

Comments

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Abbreviated Journal Title

Prep. Biochem. Biotechnol.

Keywords

GLYCOPROTEIN; Biochemical Research Methods; Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology

Abstract

The glycosylation patterns of phytase (E C 3.1.3.8) from Aspergillus niger NRRL 3135 with recombinant phytase from A. niger van Tieghem were compared. The following characteristics were studied: size of the whole molecule, type of linkage (N-linked or O-linked oligosaccharide), profile (number of different types of oligosaccharides present), monosaccharide composition, their order, and configuration. The molecular weights of both glycoproteins, after deglycosylation, was approximately 55 kDa as determined by SDS-PAGE. Both glycoproteins were about 35.29% glycosylated (calculations were made on the basis of 85 kDa molecular weight before deglycosylation). Only N-linked oligosaccharides were present. When N-linked oligosaccharides were released and labeled, the same profile was obtained for both glycoproteins. Mannose residues were detected after digestion by combinations of various exoglycosidases. N-acetylneuraminic acid, galactose, and N-acetylglucosamine residues were not detected. Released mannose residues were (alpha 1-2,3,6) linked. The trisaccharide core structure was nonfucosylated for all the oligosaccharides released from both glycoproteins. The only major difference found between the two glycoproteins was the migration pattern of oligosaccharide bands on gel after digestion with alpha-mannosidases. The structure of N-linked oligosaccharides ranged from (Man)(5)(GlcNAc)(2) to (Man)(10) (GlcNAc)(2).

Journal Title

Preparative Biochemistry & Biotechnology

Volume

28

Issue/Number

3

Publication Date

1-1-1998

Document Type

Article

Language

English

First Page

201

Last Page

217

WOS Identifier

WOS:000075731900001

ISSN

1082-6068

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