5HXP image
Deposition Date 2016-01-31
Release Date 2017-04-05
Last Version Date 2023-11-08
Entry Detail
PDB ID:
5HXP
Keywords:
Title:
Crystal Structure of Z,Z-Farnesyl Diphosphate Synthase (D71M, E75A and H103Y Mutants) Complexed with IPP
Biological Source:
Source Organism:
Host Organism:
Method Details:
Experimental Method:
Resolution:
1.95 Å
R-Value Free:
0.24
R-Value Work:
0.19
R-Value Observed:
0.20
Space Group:
P 21 21 21
Macromolecular Entities
Polymer Type:polypeptide(L)
Molecule:(2Z,6Z)-farnesyl diphosphate synthase, chloroplastic
Gene (Uniprot):ZFPS
Mutations:E75A, H103Y
Chain IDs:A, B (auth: C)
Chain Length:233
Number of Molecules:2
Biological Source:Solanum habrochaites
Primary Citation
Crystal Structure and Potential Head-to-Middle Condensation Function of aZ,Z-Farnesyl Diphosphate Synthase.
Acs Omega 2 930 936 (2017)
PMID: 30023621 DOI: 10.1021/acsomega.6b00562

Abstact

Plants produce a wide variety of secondary metabolites in response to adverse environmental factors. Z,Z-Farnesyl diphosphate (Z,Z-FPP), synthesized by Z,Z-farnesyl diphosphate synthase (zFPS), supports the formation of phytochemicals in wild tomatoes. Here, the crystal structure of N-terminal truncated zFPS (ΔzFPS) was determined. Irregular products including lavandulyl diphosphate and an unknown compound were surprisingly found. Apart from the truncated N-terminus as a functional regulator, structure-based analysis and mutagenesis assays revealed a residue H103 in ΔzFPS as one of the key elements to this irregular function. A series of substrate-enzyme complex structures were obtained from ΔzFPS-H103Y by co-crystallizing with isopentenyl diphosphate, dimethylallyl thiolodiphosphate, or both. Various substrate-binding modes were revealed. The catalytic mechanisms of both the head-to-tail and head-to-middle reactions in ΔzFPS were proposed. Functional switch between the two mechanisms in this enzyme and the essential role played by the flexible C-terminus were elucidated as well.

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Primary Citation of related structures