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R. sphaeroides Δirr -Fe vs. R. sphaeroides Δirr +Fe under microaerobic conditions

ABSTRACT: Transcriptional profiling of R. sphaeroides Δirr under iron limitation (-Fe) compared to control R. sphaeroides Δirr under normal growth conditions (+Fe).

ORGANISM(S): Cereibacter sphaeroides 2.4.1

PROVIDER: GSE33533 | GEO | 2011/11/09

SECONDARY ACCESSION(S): PRJNA154271

REPOSITORIES: GEO

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R. sphaeroides Δirr -Fe vs. R. sphaeroides Δirr +Fe under microaerobic conditions

Project description:Transcriptional profiling of R. sphaeroides Δirr under iron limitation (-Fe) compared to control R. sphaeroides Δirr under normal growth conditions (+Fe). Two strain experiment under normal iron (+Fe) and iron limitation (-Fe) conditions. 6 Biological replicates, independently grown and harvested at OD660=0,4; 1-3 pooled in replicate 1, 4-6 pooled in replicate 2

2011-11-09 | E-GEOD-33533 | biostudies-arrayexpress

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2011-11-09 | GSE33534 | GEO

R. sphaeroides Δirr vs. R. sphaeroides 2.4.1 under microaerobic conditions

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2011-11-09 | E-GEOD-33534 | biostudies-arrayexpress

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E. coli monothiol glutaredoxin GrxD replenishes Fe-S clusters to the essential ErpA A-type carrier under low iron stress  

Project description:Iron-sulfur (Fe-S) clusters are required for essential biological pathways, including respiration and isoprenoid biosynthesis. Complex Fe-S cluster biogenesis systems have evolved to maintain an adequate supply of this critical protein cofactor. In Escherichia coli, two Fe-S biosynthetic systems, the “housekeeping” Isc and “stress responsive” Suf pathways, interface with a network of cluster trafficking proteins, such as ErpA, IscA, SufA, and NfuA. GrxD, a Fe-S cluster-binding monothiol glutaredoxin, also participates in Fe-S protein biogenesis in both prokaryotes and eukaryotes. Previous studies in E. coli showed that the ∆grxD mutation causes sensitivity to iron depletion, spotlighting a critical role for GrxD under conditions that disrupt Fe-S homeostasis. Here, we utilized a global chemoproteomic mass spectrometry (MS) approach to analyse the contribution of GrxD to the Fe-S proteome. Our results demonstrate that 1) GrxD is required for biogenesis of a specific subset of Fe-S proteins under iron-depleted conditions, 2) GrxD is required for cluster delivery to ErpA under iron limitation, 3) GrxD is functionally distinct from other Fe-S trafficking proteins and, 4) GrxD Fe-S cluster binding is responsive to iron limitation. All these results lead to the proposal that GrxD is required to maintain Fe-S cluster delivery to the essential trafficking protein ErpA during iron limitation conditions.

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Transcriptional profiling of R. sphaeroides Δirr

Project description:This SuperSeries is composed of the following subset Series: GSE33533: R. sphaeroides Δirr -Fe vs. R. sphaeroides Δirr +Fe under microaerobic conditions GSE33534: R. sphaeroides Δirr vs. R. sphaeroides 2.4.1 under microaerobic conditions Refer to individual Series

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