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Conformational change of a unique sequence in a fungal galectin from Agrocybe cylindracea controls glycan ligand-binding specificity.
- Source :
-
FEBS letters [FEBS Lett] 2013 Nov 15; Vol. 587 (22), pp. 3620-5. Date of Electronic Publication: 2013 Sep 10. - Publication Year :
- 2013
-
Abstract
- A fungal galectin from Agrocybe cylindracea (ACG) exhibits broad binding specificity for β-galactose-containing glycans. We determined the crystal structures of wild-type ACG and the N46A mutant, with and without glycan ligands. From these structures and a saccharide-binding analysis of the N46A mutant, we revealed that a conformational change of a unique insertion sequence containing Asn46 provides two binding modes for ACG, and thereby confers broad binding specificity. We propose that the unique sequence provides these two distinct glycan-binding modes by an induced-fit mechanism.<br /> (Copyright © 2013 Federation of European Biochemical Societies. Published by Elsevier B.V. All rights reserved.)
- Subjects :
- Amino Acid Sequence
Amino Acid Substitution
Crystallography, X-Ray
Fungal Proteins genetics
Galectins genetics
Hydrogen Bonding
Lactose
Ligands
Models, Molecular
Molecular Sequence Data
Protein Binding
Protein Structure, Secondary
Protein Structure, Tertiary
Agrocybe
Fungal Proteins chemistry
Galectins chemistry
Subjects
Details
- Language :
- English
- ISSN :
- 1873-3468
- Volume :
- 587
- Issue :
- 22
- Database :
- MEDLINE
- Journal :
- FEBS letters
- Publication Type :
- Academic Journal
- Accession number :
- 24036446
- Full Text :
- https://doi.org/10.1016/j.febslet.2013.08.046