ISDA

Deposition Date 2005-07-06

Release Date 2006-06-13

Last Version Date 2024-03-13

Entry Detail

PDB ID:

2CYF

Keywords:

METAL BINDING PROTEIN

Title:

The Crystal Structure of Canavalia Maritima Lectin (ConM) in Complex with Trehalose and Maltose

Biological Source:

Source Organism:

Canavalia maritima (Taxon ID: 3825)

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

1.80 Å

R-Value Free:

0.23

R-Value Work:

0.18

R-Value Observed:

0.19

Space Group:

P 21 21 2

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Macromolecular Entities

Structures with similar UniProt ID

Protein Blast

Polymer Type:polypeptide(L)
Molecule:Lectin
Chain IDs:A, B (auth: C)
Chain Length:237
Number of Molecules:2
Biological Source:Canavalia maritima

UniProt ID:P55915 Pfam ID:PF00139

Ligand Molecules

Peptide-like Molecules

PRD_900001

Primary Citation

Crystal structure of a lectin from Canavalia maritima (ConM) in complex with trehalose and maltose reveals relevant mutation in ConA-like lectins

Delatorre, P, Rocha, B.A.M, Gadelha, C.A.A, Santi-Gadelha, T, Cajazeiras, J.B, Souza, E.P, Nascimento, K.S, Freire, V.N, Sampaio, A.H, Azevedo Jr, W.F, Cavada, B.S.Show

J.Struct.Biol. 154 280 286 (2006)

PMID: 16677825 DOI: 10.1016/j.jsb.2006.03.011

Abstact

The crystal structure of Canavalia maritima lectin (ConM) complexed with trehalose and maltose revealed relevant point mutations in ConA-like lectins. ConM with the disaccharides and other ConA-like lectins complexed with carbohydrates demonstrated significant differences in the position of H-bonds. The main difference in the ConM structure is the replacement of Pro202 by Ser202, a residue that promotes the approximation of Tyr12 to the carbohydrate-binding site. The O-6' of the second glucose ring in maltose interacts with Tyr12, while in trehalose the interaction is established by the O-2' and Tyr12, explaining the higher affinity of ConM for disaccharides compared to monosaccharides.

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Primary Citation of related structures