Serveur d'exploration cluster fer-soufre

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SufT is required for growth of Mycobacterium smegmatis under iron limiting conditions.

Identifieur interne : 000029 ( Main/Exploration ); précédent : 000028; suivant : 000030

SufT is required for growth of Mycobacterium smegmatis under iron limiting conditions.

Auteurs : Tsaone Tamuhla [Afrique du Sud] ; Lydia Joubert [États-Unis, Afrique du Sud] ; Danicke Willemse [États-Unis, Afrique du Sud] ; Monique J. Williams [Afrique du Sud]

Source :

RBID : pubmed:31860439

Descripteurs français

English descriptors

Abstract

Iron-sulphur (FeS) clusters are versatile cofactors required for a range of biological processes within cells. Due to the reactive nature of the constituent molecules, assembly and delivery of these cofactors requires a multi-protein machinery in vivo. In prokaryotes, SufT homologues are proposed to function in the maturation and transfer of FeS clusters to apo-proteins. This study used targeted gene deletion to investigate the role of SufT in the physiology of mycobacteria, using Mycobacterium smegmatis as a model organism. Deletion of the sufT gene in M. smegmatis had no impact on growth under standard culture conditions and did not significantly alter activity of the FeS cluster dependent enzymes succinate dehydrogenase (SDH) and aconitase (ACN). Furthermore, the ΔsufT mutant was no more sensitive than the wild-type strain to the redox cycler 2,3-dimethoxy-1,4-naphthoquinone (DMNQ), or the anti-tuberculosis drugs isoniazid, clofazimine or rifampicin. In contrast, the ΔsufT mutant displayed a growth defect under iron limiting conditions, and an increased requirement for iron during biofilm formation. This data suggests that SufT is an accessory factor in FeS cluster biogenesis in mycobacteria which is required under conditions of iron limitation.

DOI: 10.1099/mic.0.000881
PubMed: 31860439


Affiliations:


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Le document en format XML

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under iron limiting conditions.</title>
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<keywords scheme="KwdEn" xml:lang="en">
<term>Aconitate Hydratase (metabolism)</term>
<term>Bacterial Proteins (genetics)</term>
<term>Biofilms (MeSH)</term>
<term>Coenzymes (genetics)</term>
<term>Gene Deletion (MeSH)</term>
<term>Iron (metabolism)</term>
<term>Iron-Sulfur Proteins (biosynthesis)</term>
<term>Iron-Sulfur Proteins (genetics)</term>
<term>Iron-Sulfur Proteins (metabolism)</term>
<term>Mycobacterium smegmatis (genetics)</term>
<term>Mycobacterium smegmatis (metabolism)</term>
<term>Succinate Dehydrogenase (metabolism)</term>
</keywords>
<keywords scheme="KwdFr" xml:lang="fr">
<term>Aconitate hydratase (métabolisme)</term>
<term>Biofilms (MeSH)</term>
<term>Coenzymes (génétique)</term>
<term>Délétion de gène (MeSH)</term>
<term>Fer (métabolisme)</term>
<term>Ferrosulfoprotéines (biosynthèse)</term>
<term>Ferrosulfoprotéines (génétique)</term>
<term>Ferrosulfoprotéines (métabolisme)</term>
<term>Mycobacterium smegmatis (génétique)</term>
<term>Mycobacterium smegmatis (métabolisme)</term>
<term>Protéines bactériennes (génétique)</term>
<term>Succinate Dehydrogenase (métabolisme)</term>
</keywords>
<keywords scheme="MESH" type="chemical" qualifier="biosynthesis" xml:lang="en">
<term>Iron-Sulfur Proteins</term>
</keywords>
<keywords scheme="MESH" type="chemical" qualifier="genetics" xml:lang="en">
<term>Bacterial Proteins</term>
<term>Coenzymes</term>
<term>Iron-Sulfur Proteins</term>
</keywords>
<keywords scheme="MESH" type="chemical" qualifier="metabolism" xml:lang="en">
<term>Aconitate Hydratase</term>
<term>Iron</term>
<term>Iron-Sulfur Proteins</term>
<term>Succinate Dehydrogenase</term>
</keywords>
<keywords scheme="MESH" qualifier="biosynthèse" xml:lang="fr">
<term>Ferrosulfoprotéines</term>
</keywords>
<keywords scheme="MESH" qualifier="genetics" xml:lang="en">
<term>Mycobacterium smegmatis</term>
</keywords>
<keywords scheme="MESH" qualifier="génétique" xml:lang="fr">
<term>Coenzymes</term>
<term>Ferrosulfoprotéines</term>
<term>Mycobacterium smegmatis</term>
<term>Protéines bactériennes</term>
</keywords>
<keywords scheme="MESH" qualifier="metabolism" xml:lang="en">
<term>Mycobacterium smegmatis</term>
</keywords>
<keywords scheme="MESH" qualifier="métabolisme" xml:lang="fr">
<term>Aconitate hydratase</term>
<term>Fer</term>
<term>Ferrosulfoprotéines</term>
<term>Mycobacterium smegmatis</term>
<term>Succinate Dehydrogenase</term>
</keywords>
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<term>Biofilms</term>
<term>Gene Deletion</term>
</keywords>
<keywords scheme="MESH" xml:lang="fr">
<term>Biofilms</term>
<term>Délétion de gène</term>
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<div type="abstract" xml:lang="en">Iron-sulphur (FeS) clusters are versatile cofactors required for a range of biological processes within cells. Due to the reactive nature of the constituent molecules, assembly and delivery of these cofactors requires a multi-protein machinery
<i>in vivo</i>
. In prokaryotes, SufT homologues are proposed to function in the maturation and transfer of FeS clusters to apo-proteins. This study used targeted gene deletion to investigate the role of SufT in the physiology of mycobacteria, using
<i>Mycobacterium smegmatis</i>
as a model organism. Deletion of the
<i>sufT</i>
gene in
<i>M. smegmatis</i>
had no impact on growth under standard culture conditions and did not significantly alter activity of the FeS cluster dependent enzymes succinate dehydrogenase (SDH) and aconitase (ACN). Furthermore, the Δ
<i>sufT</i>
mutant was no more sensitive than the wild-type strain to the redox cycler 2,3-dimethoxy-1,4-naphthoquinone (DMNQ), or the anti-tuberculosis drugs isoniazid, clofazimine or rifampicin. In contrast, the Δ
<i>sufT</i>
mutant displayed a growth defect under iron limiting conditions, and an increased requirement for iron during biofilm formation. This data suggests that SufT is an accessory factor in FeS cluster biogenesis in mycobacteria which is required under conditions of iron limitation.</div>
</front>
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<AbstractText>Iron-sulphur (FeS) clusters are versatile cofactors required for a range of biological processes within cells. Due to the reactive nature of the constituent molecules, assembly and delivery of these cofactors requires a multi-protein machinery
<i>in vivo</i>
. In prokaryotes, SufT homologues are proposed to function in the maturation and transfer of FeS clusters to apo-proteins. This study used targeted gene deletion to investigate the role of SufT in the physiology of mycobacteria, using
<i>Mycobacterium smegmatis</i>
as a model organism. Deletion of the
<i>sufT</i>
gene in
<i>M. smegmatis</i>
had no impact on growth under standard culture conditions and did not significantly alter activity of the FeS cluster dependent enzymes succinate dehydrogenase (SDH) and aconitase (ACN). Furthermore, the Δ
<i>sufT</i>
mutant was no more sensitive than the wild-type strain to the redox cycler 2,3-dimethoxy-1,4-naphthoquinone (DMNQ), or the anti-tuberculosis drugs isoniazid, clofazimine or rifampicin. In contrast, the Δ
<i>sufT</i>
mutant displayed a growth defect under iron limiting conditions, and an increased requirement for iron during biofilm formation. This data suggests that SufT is an accessory factor in FeS cluster biogenesis in mycobacteria which is required under conditions of iron limitation.</AbstractText>
</Abstract>
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<Affiliation>Present address: Department of Integrative Biomedical Sciences, Division of Computational Biology, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa.</Affiliation>
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<AffiliationInfo>
<Affiliation>DST-NRF Centre of Excellence for Biomedical Tuberculosis Research; South African Medical Research Council Centre for Tuberculosis Research; Division of Molecular Biology and Human Genetics, Faculty of Medicine and Health Sciences, Stellenbosch University, Cape Town, South Africa.</Affiliation>
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<Affiliation>Central Analytical Facilties, Microbiology Department, Stellenbosch University, Stellenbosch, South Africa.</Affiliation>
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<Affiliation>DST-NRF Centre of Excellence for Biomedical Tuberculosis Research; South African Medical Research Council Centre for Tuberculosis Research; Division of Molecular Biology and Human Genetics, Faculty of Medicine and Health Sciences, Stellenbosch University, Cape Town, South Africa.</Affiliation>
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<MeshHeading>
<DescriptorName UI="D000154" MajorTopicYN="N">Aconitate Hydratase</DescriptorName>
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<QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName>
</MeshHeading>
<MeshHeading>
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