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Updated: May 2, 2026

Profiling Thiol Redox Proteome Using Isotope Tagging Mass Spectrometry
Published on: March 24, 2012
Eukaryotic genomes contain a [2Fez.sbnd;2S] ferredoxin isoform with a conserved C-terminal sequence motif
1FB Biologie/Parasitologie, Philipps-Universität Marburg, Germany. seeber@mailer.uni-marburg.de
Abstract:
Apicomplexan protists contain a single mitochondrial [2Fe-2S] ferredoxin sequence (mtFd) with a highly conserved C-terminal motif, VDGxxpxPH, that distinguishes it from other mtFd, which have heterogeneous C-termini. This isoform of mtFd, called 'type II ferredoxin', is widespread in eukaryotes, some species having two isoforms and others possessing only one. Because of the known modulating role of the C-terminus of type I mtFd during association with itself and other interacting proteins, the presence of a conserved C-terminus in type II mtFd suggests it evolved either as a means for optimized homodimerization or to allow interaction with a highly conserved partner(s) that is yet to be defined.
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