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1fay

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{{STRUCTURE_1fay| PDB=1fay | SCENE= }}
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'''WINGED BEAN ACIDIC LECTIN COMPLEXED WITH METHYL-ALPHA-D-GALACTOSE (MONOCLINIC FORM)'''
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===WINGED BEAN ACIDIC LECTIN COMPLEXED WITH METHYL-ALPHA-D-GALACTOSE (MONOCLINIC FORM)===
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==Overview==
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Structures of two crystal forms of the dimeric acidic winged bean agglutinin (WBAII) complexed with methyl-alpha-D-galactose have been determined at 3.0 A and 3.3 A resolution. The subunit structure and dimerisation of the lectin are similar to those of the basic lectin from winged bean (WBAI) and the lectin from Erythrina corallodendron (EcorL). The conformation of a loop and its orientation with respect to the rest of the molecule in WBAII are, however, different from those in all the other legume lectins of known structure. This difference appears to have been caused by the formation of two strategically placed salt bridges in the former. Modelling based on the crystal structures provides a rationale for the specificity of the lectin, which is very different from that of WBAI, for the H-antigenic determinant responsible for O blood group reactivity. It also leads to a qualitative explanation for the thermodynamic data on sugar-binding to the lectin, with special emphasis on the role of a tyrosyl residue in the variable loop in the sugar-binding region in generating the carbohydrate specificity of WBAII.
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(as it appears on PubMed at http://www.pubmed.gov), where 11183779 is the PubMed ID number.
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{{ABSTRACT_PUBMED_11183779}}
==About this Structure==
==About this Structure==
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[[Category: H-antigenic specificity]]
[[Category: H-antigenic specificity]]
[[Category: Legume lectin]]
[[Category: Legume lectin]]
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Revision as of 23:58, 30 June 2008

Image:1fay.png

Template:STRUCTURE 1fay

WINGED BEAN ACIDIC LECTIN COMPLEXED WITH METHYL-ALPHA-D-GALACTOSE (MONOCLINIC FORM)

Template:ABSTRACT PUBMED 11183779

About this Structure

1FAY is a Single protein structure of sequence from Psophocarpus tetragonolobus. Full crystallographic information is available from OCA.

Reference

Carbohydrate specificity and salt-bridge mediated conformational change in acidic winged bean agglutinin., Manoj N, Srinivas VR, Surolia A, Vijayan M, Suguna K, J Mol Biol. 2000 Oct 6;302(5):1129-37. PMID:11183779

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