Phylloquinone, what can we learn from plants?
The plant plasma membrane contains redox proteins able to mediate a trans-membrane electron flow. This electron flow might be responsible for the generation of the active oxygen species observed as a reaction to pathogen attack or stress. Vitamin K1 could be identified as a possible lipid soluble electron carrier in plant plasma membrane preparations. Such a function would be analogous to coenzyme Q in animal plasma membranes. What we are going to outline in this contribution is a concept of how the electron transport system of the plant plasma membrane could interact with quinones, thus contributing to the metabolism of free radicals in plants.
Lochner
K
K
Biozentrum Klein Flottbek, University of Hamburg, Ohnhorstrasse 18, D-22609 Hamburg, Germany.
Döring
O
O
Böttger
M
M
D000818:Animals; D002462:Cell Membrane / Q000737:chemistry / Q000378:metabolism; D004579:Electron Transport; D005609:Free Radicals / Q000378:metabolism; D010944:Plants / Q000737:chemistry* / Q000648:ultrastructure; D017382:Reactive Oxygen Species / Q000378:metabolism; D016897:Respiratory Burst; D014451:Ubiquinone / Q000378:metabolism; D010837:Vitamin K 1 / Q000032:analysis / Q000378:metabolism*
D005609:Free Radicals; D017382:Reactive Oxygen Species; D014451:Ubiquinone; D010837:Vitamin K 1