3WJO image
Entry Detail
PDB ID:
3WJO
Keywords:
TRANSFERASE
Title:
Crystal structure of Octaprenyl Pyrophosphate synthase from Escherichia coli with isopentenyl pyrophosphate (IPP)
Biological Source:
Source Organism:
Escherichia coli
Host Organism:
Escherichia coli
PDB Version:
Deposition Date:
2013-10-12
Release Date:
2014-06-18
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
2.45 Å
R-Value Free:
0.27
R-Value Work:
0.22
Space Group:
P 21 21 2
3WJO validation report
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Octaprenyl diphosphate synthase
Chain IDs:A, B
Chain Length:337
Number of Molecules:2
Biological Source:Escherichia coli
Ligand Molecules
IPE
Primary Citation
Crystal structures of ligand-bound octaprenyl pyrophosphate synthase from Escherichia coli reveal the catalytic and chain-length determining mechanisms.
Proteins 83 37 45 (2015)
PMID: 24895191 DOI: 10.1002/prot.24618

Abstact

Octaprenyl pyrophosphate synthase (OPPs) catalyzes consecutive condensation reactions of one allylic substrate farnesyl pyrophosphate (FPP) and five homoallylic substrate isopentenyl pyrophosphate (IPP) molecules to form a C40 long-chain product OPP, which serves as a side chain of ubiquinone and menaquinone. OPPs belongs to the trans-prenyltransferase class of proteins. The structures of OPPs from Escherichia coli were solved in the apo-form as well as in complexes with IPP and a FPP thio-analog, FsPP, at resolutions of 2.2-2.6 Å, and revealed the detailed interactions between the ligands and enzyme. At the bottom of the active-site tunnel, M123 and M135 act in concert to form a wall which determines the final chain length. These results represent the first ligand-bound crystal structures of a long-chain trans-prenyltransferase and provide new information on the mechanisms of catalysis and product chain elongation.

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Primary Citation of related structures
3WJK
3WJN