Mitochondrial complex II of plants

subunit composition, assembly, and function in respiration and signaling

verfasst von

Shaobai Huang, Hans Peter Braun, Ryan M.R. Gawryluk, A. Harvey Millar

Abstract

Complex II [succinate dehydrogenase (succinate-ubiquinone oxidoreductase); EC 1.3.5.1; SDH] is the only enzyme shared by both the electron transport chain and the tricarboxylic acid (TCA) cycle in mitochondria. Complex II in plants is considered unusual because of its accessory subunits (SDH5–SDH8), in addition to the catalytic subunits of SDH found in all eukaryotes (SDH1–SDH4). Here, we review compositional and phylogenetic analysis and biochemical dissection studies to both clarify the presence and propose a role for these subunits. We also consider the wider functional and phylogenetic evidence for SDH assembly factors and the reports from plants on the control of SDH1 flavination and SDH1–SDH2 interaction. Plant complex II has been shown to influence stomatal opening, the plant defense response and reactive oxygen species-dependent stress responses. Signaling molecules such as salicyclic acid (SA) and nitric oxide (NO) are also reported to interact with the ubiquinone (UQ) binding site of SDH, influencing signaling transduction in plants. Future directions for SDH research in plants and the specific roles of its different subunits and assembly factors are suggested, including the potential for reverse electron transport to explain the succinate-dependent production of reactive oxygen species in plants and new avenues to explore the evolution of plant mitochondrial complex II and its utility.

Organisationseinheit(en)

Institut für Pflanzengenetik

Externe Organisation(en)

University of Western Australia
University of Victoria BC

Typ

Übersichtsarbeit

Journal

Plant Journal

Band

98

Seiten

405-417

Anzahl der Seiten

13

ISSN

0960-7412

Publikationsdatum

29.04.2019

Publikationsstatus

Veröffentlicht

Peer-reviewed

Ja

ASJC Scopus Sachgebiete

Genetik, Pflanzenkunde, Zellbiologie

Elektronische Version(en)

https://rss.onlinelibrary.wiley.com/doi/am-pdf/10.1111/tpj.14227 (Zugang: Offen)
https://doi.org/10.1111/tpj.14227 (Zugang: Offen)