During FeS cluster biogenesis, ferredoxin and frataxin use overlapping binding sites on yeast cysteine desulfurase Nfs1.
Binding Sites
Carbon-Sulfur Lyases
/ genetics
Ferredoxins
/ metabolism
Iron-Binding Proteins
/ metabolism
Iron-Sulfur Proteins
/ metabolism
Mitochondrial Proteins
/ metabolism
Saccharomyces cerevisiae
/ enzymology
Saccharomyces cerevisiae Proteins
/ metabolism
Sulfurtransferases
/ metabolism
Frataxin
iron–sulfur protein
mitochondria
protein complex
protein evolution
protein–protein interactions
Journal
The Journal of biological chemistry
ISSN: 1083-351X
Titre abrégé: J Biol Chem
Pays: United States
ID NLM: 2985121R
Informations de publication
Date de publication:
02 2022
02 2022
Historique:
received:
02
12
2021
accepted:
04
01
2022
pubmed:
14
1
2022
medline:
29
4
2022
entrez:
13
1
2022
Statut:
ppublish
Résumé
In mitochondria, cysteine desulfurase (Nfs1) plays a central role in the biosynthesis of iron-sulfur (FeS) clusters, cofactors critical for activity of many cellular proteins. Nfs1 functions both as a sulfur donor for cluster assembly and as a binding platform for other proteins functioning in the process. These include not only the dedicated scaffold protein (Isu1) on which FeS clusters are synthesized but also accessory FeS cluster biogenesis proteins frataxin (Yfh1) and ferredoxin (Yah1). Yfh1 has been shown to activate cysteine desulfurase enzymatic activity, whereas Yah1 supplies electrons for the persulfide reduction. While Yfh1 interaction with Nfs1 is well understood, the Yah1-Nfs1 interaction is not. Here, based on the results of biochemical experiments involving purified WT and variant proteins, we report that in Saccharomyces cerevisiae, Yah1 and Yfh1 share an evolutionary conserved interaction site on Nfs1. Consistent with this notion, Yah1 and Yfh1 can each displace the other from Nfs1 but are inefficient competitors when a variant with an altered interaction site is used. Thus, the binding mode of Yah1 and Yfh1 interacting with Nfs1 in mitochondria of S. cerevisiae resembles the mutually exclusive binding of ferredoxin and frataxin with cysteine desulfurase reported for the bacterial FeS cluster assembly system. Our findings are consistent with the generally accepted scenario that the mitochondrial FeS cluster assembly system was inherited from bacterial ancestors of mitochondria.
Identifiants
pubmed: 35026224
pii: S0021-9258(22)00010-2
doi: 10.1016/j.jbc.2022.101570
pmc: PMC8888459
pii:
doi:
Substances chimiques
Ferredoxins
0
Iron-Binding Proteins
0
Iron-Sulfur Proteins
0
Mitochondrial Proteins
0
Saccharomyces cerevisiae Proteins
0
Sulfurtransferases
EC 2.8.1.-
NFS1 protein, S cerevisiae
EC 2.8.1.7
Carbon-Sulfur Lyases
EC 4.4.-
cysteine desulfurase
EC 4.4.1.-
Types de publication
Journal Article
Research Support, N.I.H., Extramural
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
101570Subventions
Organisme : NIGMS NIH HHS
ID : R35 GM127009
Pays : United States
Informations de copyright
Copyright © 2022 The Authors. Published by Elsevier Inc. All rights reserved.
Déclaration de conflit d'intérêts
Conflict of interest The authors declare that they have no conflicts of interests with the content of this article.
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