Skip to Main content Skip to Navigation
Journal articles

Same but different: Comparison of two system-specific molecular chaperones for the maturation of formate dehydrogenases

Abstract : The maturation of bacterial molybdoenzymes is a complex process leading to the insertion of the bulky bis-molybdopterin guanine dinucleotide (bis-MGD) cofactor into the apo-enzyme. Most molybdoenzymes were shown to contain a specific chaperone for the insertion of the bis-MGD cofactor. Formate dehydrogenases (FDH) together with their molecular chaperone partner seem to display an exception to this specificity rule, since the chaperone FdhD has been proven to be involved in the maturation of all three FDH enzymes present in Escherichia coli. Multiple roles have been suggested for FdhD-like chaperones in the past, including the involvement in a sulfur transfer reaction from the L-cysteine desulfurase IscS to bis-MGD by the action of two cysteine residues present in a conserved CXXC motif of the chaperones. However, in this study we show by phylogenetic analyses that the CXXC motif is not conserved among FdhD-like chaperones. We compared in detail the FdhD-like homo-logues from Rhodobacter capsulatus and E. coli and show that their roles in the maturation of FDH enzymes from different subgroups can be exchanged. We reveal that bis-MGD-binding is a common characteristic of FdhD-like proteins and that the cofactor is bound with a sulfido-ligand at the molybdenum atom to the chaperone. Generally, we reveal that the cysteine residues in the motif CXXC of the chaperone are not essential for the production of active FDH enzymes.
Complete list of metadatas

Cited literature [58 references]  Display  Hide  Download

https://hal-amu.archives-ouvertes.fr/hal-01927954
Contributor : Laure Azzopardi <>
Submitted on : Tuesday, November 20, 2018 - 11:25:07 AM
Last modification on : Wednesday, November 20, 2019 - 11:00:41 AM

File

PLOS ONE ZSCHWANHOLD 2018 03.p...
Publication funded by an institution

Licence


Distributed under a Creative Commons Attribution 4.0 International License

Identifiers

Collections

Citation

Nadine Schwanhold, Chantal Iobbi-Nivol, Angelika Lehmann, Silke Leimkuhler. Same but different: Comparison of two system-specific molecular chaperones for the maturation of formate dehydrogenases. PLoS ONE, Public Library of Science, 2018, 13 (11), ⟨10.1371/journal.pone.0201935⟩. ⟨hal-01927954⟩

Share

Metrics

Record views

90

Files downloads

167