1SB2 image
Entry Detail
PDB ID:
1SB2
Keywords:
Title:
High resolution Structure determination of rhodocetin
Biological Source:
Source Organism:
PDB Version:
Deposition Date:
2004-02-10
Release Date:
2005-02-01
Method Details:
Experimental Method:
Resolution:
1.90 Å
R-Value Free:
0.23
R-Value Work:
0.18
R-Value Observed:
0.19
Space Group:
P 21 21 21
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Rhodocetin alpha subunit
Chain IDs:A
Chain Length:133
Number of Molecules:1
Biological Source:Calloselasma rhodostoma
Polymer Type:polypeptide(L)
Description:Rhodocetin beta subunit
Chain IDs:B
Chain Length:129
Number of Molecules:1
Biological Source:Calloselasma rhodostoma
Primary Citation
Structure of rhodocetin reveals noncovalently bound heterodimer interface
Protein Sci. 14 169 175 (2005)
PMID: 15576563 DOI: 10.1110/ps.04945605

Abstact

Rhodocetin is a unique heterodimer consisting of alpha- and beta-subunits of 133 and 129 residues, respectively. The molecule, purified from the crude venom of the Malayan pit viper, Calloselasma rhodostoma, functions as an inhibitor of collagen-induced aggregation. Rhodocetin has been shown to have activity only when present as a dimer. The dimer is formed without an intersubunit disulfide bridge, unlike all the other Ca(2+)-dependent lectin-like proteins. We report here the 1.9 A resolution structure of rhodocetin, which reveals the compensatory interactions that occur in the absence of the disulfide bridge to preserve activity.

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