1MVQ

Cratylia mollis lectin (isoform 1) in complex with methyl-alpha-D-mannose

Summary for 1MVQ

• Entry DOI: 10.2210/pdb1mvq/pdb
• Descriptor: lectin, isoform 1, methyl alpha-D-mannopyranoside, CALCIUM ION, ... (5 entities in total)
• Functional Keywords: legume lectin, sugar binding protein
• Biological source: Cratylia mollis
• Total number of polymer chains: 1
• Total formula weight: 25683.20

Authors

de Souza, G.A.,Oliveira, P.S.,Trapani, S.,Correia, M.T.,Oliva, G.,Coelho, L.C.,Greene, L.J. (deposition date: 2002-09-26, release date: 2003-10-07, Last modification date: 2024-02-14)

Primary citation

De Souza, G.A.,Oliveira, P.S.,Trapani, S.,Santos, A.C.,Rosa, J.C.,Laure, H.J.,Correia, M.T.,Tavares, G.A.,Oliva, G.,Coelho, L.C.,Greene, L.J.
Amino acid sequence and tertiary structure of Cratylia mollis seed lectin
Glycobiology, 13:961-972, 2003

PubMed Abstract: Carbohydrate-protein interactions play a key role in many biological processes. Cramoll is a lectin purified from Cratylia mollis seeds that is taxonomically related to concanavalin A (Con A). Although Cramoll and Con A have the same monosaccharide specificity, they have different glycoprotein binding profiles. We report the primary structure of Cramoll, determined by Edman degradation and mass spectrometry and its 1.77 A crystallographic structure and compare it with the three-dimensional structure of Con A in an attempt to understand how differential binding can be achieved by similar or nearly identical structures. We report here that Cramoll consists of 236 residues, with 82% identity with Con A, and that its topological architecture is essentially identical to Con A, because the Calpha positional differences are below 3.5 A. Cramoll and Con A have identical binding sites for MealphaMan, Mn2+, and Ca2+. However, we observed six substitutions in a groove adjacent to the extended binding site and two in the extended binding site that may explain the differences in binding of oligosaccharides and glycoproteins between Cramoll and Con A.

PubMed: 12966038
DOI: 10.1093/glycob/cwg115

Experimental method

X-RAY DIFFRACTION (1.77 Å)