2P72 image
Entry Detail
PDB ID:
2P72
Keywords:
Title:
crystal structure of a glycosyltransferase involved in the glycosylation of the major capsid of PBCV-1
Biological Source:
PDB Version:
Deposition Date:
2007-03-19
Release Date:
2007-08-21
Method Details:
Experimental Method:
Resolution:
2.00 Å
R-Value Free:
0.23
R-Value Work:
0.20
R-Value Observed:
0.20
Space Group:
C 1 2 1
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Putative glycosyltransferase (Mannosyltransferase) involved in glycosylating the PBCV-1 major capsid protein
Chain IDs:A, B
Chain Length:213
Number of Molecules:2
Biological Source:Paramecium bursaria Chlorella virus 1
Primary Citation
Structure and function of a chlorella virus-encoded glycosyltransferase.
Structure 15 1031 1039 (2007)
PMID: 17850743 DOI: 10.1016/j.str.2007.07.006

Abstact

Paramecium bursaria chlorella virus-1 encodes at least five putative glycosyltransferases that are probably involved in the synthesis of the glycan components of the viral major capsid protein. The 1.6 A crystal structure of one of these glycosyltransferases (A64R) has a mixed alpha/beta fold containing a central, six-stranded beta sheet flanked by alpha helices. Crystal structures of A64R, complexed with UDP, CMP, or GDP, established that only UDP bound to A64R in the presence of Mn(2+), consistent with its high structural similarity to glycosyltransferases which utilize UDP as the sugar carrier. The structure of the complex of A64R, UDP-glucose, and Mn(2+) showed that the largest conformational change occurred when hydrogen bonds were formed with the ligands. Unlike UDP-glucose, UDP-galactose and UDP-GlcNAc did not bind to A64R, suggesting a selective binding of UDP-glucose. Thus, UDP-glucose is most likely the sugar donor for A64R, consistent with glucose occurring in the virus major capsid protein glycans.

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