Aerobic and anaerobic Mg-protoporphyrin monomethyl ester cyclases in purple bacteria: a strategy adopted to bypass the repressive oxygen control system

S Ouchane, AS Steunou, M Picaud, C Astier - Journal of Biological …, 2004 - ASBMB
Two different mechanisms for Mg-protoporphyrin monomethyl ester (MgPMe) cyclization are
shown to coexist in Rubrivivax gelatinosus and are proposed to be conserved in all …

Rubrivivax gelatinosus acsF (Previously orf358) Codes for a Conserved, Putative Binuclear-Iron-Cluster-Containing Protein Involved in Aerobic Oxidative Cyclization …

V Pinta, M Picaud, F Reiss-Husson… - Journal of …, 2002 - Am Soc Microbiol
This study describes the characterization of orf358, an open reading frame of previously
unidentified function, in the purple bacterium Rubrivivax gelatinosus. A strain in which …

c-Type Cytochrome Assembly Is a Key Target of Copper Toxicity within the Bacterial Periplasm

A Durand, A Azzouzi, ML Bourbon, AS Steunou… - MBio, 2015 - Am Soc Microbiol
In the absence of a tight control of copper entrance into cells, bacteria have evolved different
systems to control copper concentration within the cytoplasm and the periplasm. Central to …

Coproporphyrin III excretion identifies the anaerobic coproporphyrinogen III oxidase HemN as a copper target in the Cu+‐ATPase mutant copA− of R ubrivivax …

A Azzouzi, AS Steunou, A Durand… - Molecular …, 2013 - Wiley Online Library
Two genes encoding structurally similar C opper P1B‐type ATPases can be identified in
several genomes. Notwithstanding the high sequence and structural similarities these …

Additive effects of metal excess and superoxide, a highly toxic mixture in bacteria

AS Steunou, M Babot, ML Bourbon… - Microbial …, 2020 - Wiley Online Library
Heavy metal contamination is a serious environmental problem. Understanding the toxicity
mechanisms may allow to lower concentration of metals in the metal‐based antimicrobial …

Expression of Alternative Nitrogenases in Rhodopseudomonas palustris Is Enhanced Using an Optimized Genetic Toolset for Rapid, Markerless Modifications

JP du Toit, DJ Lea-Smith, A Git, JRD Hervey… - ACS Synthetic …, 2021 - ACS Publications
The phototrophic bacterium Rhodopseudomonas palustris is emerging as a promising
biotechnological chassis organism, due to its resilience to a range of harsh conditions, a …

A periplasmic cupredoxin with a green CuT1. 5 center is involved in bacterial copper tolerance

A Durand, M Fouesnard, ML Bourbon, AS Steunou… - Metallomics, 2021 - academic.oup.com
The importance of copper resistance pathways in pathogenic bacteria is now well
recognized, since macrophages use copper to fight bacterial infections. Additionally …

Cadmium and copper cross-tolerance. Cu+ Alleviates Cd2+ toxicity, and both cations target heme and chlorophyll biosynthesis pathway in Rubrivivax gelatinosus

AS Steunou, A Durand, ML Bourbon, M Babot… - Frontiers in …, 2020 - frontiersin.org
Cadmium, although not redox active is highly toxic. Yet, the underlying mechanisms driving
toxicity are still to be characterized. In this study, we took advantage of the purple bacterium …

Pleiotropic effects of puf interposon mutagenesis on carotenoid biosynthesis in Rubrivivax gelatinosus: a new gene organization in purple bacteria

S Ouchane, M Picaud, C Vernotte, C Astier - Journal of Biological …, 1997 - ASBMB
Rubrivivax gelatinosus mutants affected in the carotenoid biosynthesis pathways were
created by interposon mutagenesis within the puf operon. Genetic and biochemical analysis …

[HTML][HTML] Photooxidative stress stimulates illegitimate recombination and mutability in carotenoid‐less mutants of Rubrivivax gelatinosus

S Ouchane, M Picaud, C Vernotte, C Astier - The EMBO Journal, 1997 - embopress.org
Carotenoids are essential to protection against photooxidative damage in photosynthetic
and non‐photosynthetic organisms. In a previous study, we reported the disruption of crtD …