Deakin University
Browse

File(s) under permanent embargo

Detection of endogenous phosphatidylinositol 4,5-bisphosphate in phytophthora cinnamomi

journal contribution
posted on 2018-08-01, 00:00 authored by Jeffory Howard, Peter BeechPeter Beech, Damien CallahanDamien Callahan
Plant diseases caused by Phytophthora species are serious threats to agriculture and the natural environment. Genome sequencing has revealed the lack of a gene for canonical phospholipase C (PLC), an enzyme that was hitherto thought to be ubiquitous in eukaryotes. PLC acts in the hydrolysis of phosphatidylinositol 4,5-bisphosphate (PtdIns-4,5-P2 ), a membrane-bound phospholipid critical for signal initiation in many cellular processes. Previous studies have not provided evidence of endogenous PtdIns-4,5-P2 in Phytophthora and, in the absence of canonical PLC, argued for redundancy or loss in the PLC pathway in Phytophthora. Using liquid chromatography mass spectrometry, we have detected endogenous PtdIns-4,5-P2 in Phytophthora cinnamomi. This is the first identification of the phospholipid in the genus, and is significant because it indicates that the signal transduction pathway of the PLC product, inositol 1,4,5-trisphosphate (IP3 ), may have been retained in Phytophthora incorporating an as-yet unidentified homolog or analog of PLC.

History

Journal

Lipids

Volume

53

Issue

8

Pagination

835 - 839

Publisher

Wiley

Location

Chichester, Eng.

eISSN

1558-9307

Language

eng

Publication classification

C Journal article; C1 Refereed article in a scholarly journal

Copyright notice

2018, AOCS