2X9Q image
Entry Detail
PDB ID:
2X9Q
Keywords:
LIGASE
Title:
Structure of the Mycobacterium tuberculosis protein, Rv2275, demonstrates that cyclodipeptide synthetases are related to type I tRNA-Synthetases.
Biological Source:
Source Organism:
MYCOBACTERIUM TUBERCULOSIS
Host Organism:
ESCHERICHIA COLI
PDB Version:
Deposition Date:
2010-03-23
Release Date:
2010-09-22
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
2.02 Å
R-Value Free:
0.21
R-Value Work:
0.17
R-Value Observed:
0.18
Space Group:
P 21 21 21
2X9Q validation report
Macromolecular Entities
Protein Blast
Polymer Type:polypeptide(L)
Description:CYCLODIPEPTIDE SYNTHETASE
Chain IDs:A, B
Chain Length:289
Number of Molecules:2
Biological Source:MYCOBACTERIUM TUBERCULOSIS
UniProt ID:P9WPF9 Pfam ID:PF16715 EC:2.3.2.21
Modified Residue
Compound ID Chain ID Parent Comp ID Details 2D Image
MSE A MET SELENOMETHIONINE
Primary Citation
The Structure and Mechanism of the Mycobacterium Tuberculosis Cyclodityrosine Synthetase.
Nat.Chem.Biol. 6 797 ? (2010)
PMID: 20852636 DOI: 10.1038/NCHEMBIO.440

Abstact

The Mycobacterium tuberculosis enzyme Rv2275 catalyzes the formation of cyclo(L-Tyr-L-Tyr) using two molecules of Tyr-tRNA(Tyr) as substrates. The three-dimensional (3D) structure of Rv2275 was determined to 2.0-Å resolution, revealing that Rv2275 is structurally related to the class Ic aminoacyl-tRNA synthetase family of enzymes. Mutagenesis and radioactive labeling suggests a covalent intermediate in which L-tyrosine is transferred from Tyr-tRNA(Tyr) to an active site serine (Ser88) by transesterification with Glu233 serving as a critical base, catalyzing dipeptide bond formation.

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Primary Citation of related structures
2X9Q