Systematic functional analysis of the Com pilus in Streptococcus sanguinis: a minimalistic type 4 filament dedicated to DNA uptake in monoderm bacteria

Autor: Jeremy Mom, Iman Chouikha, Odile Valette, Laetitia Pieulle, Vladimir Pelicic

Publikováno v: mBio, Vol 15, Iss 1 (2024)

ABSTRACTType 4 filaments (T4F) are a superfamily of versatile nanomachines, ubiquitous in prokaryotes, which use conserved multi-protein machineries to assemble and operate filamentous polymers of type 4 pilins. In the best-studied T4F, these machine

Externí odkaz: https://doaj.org/article/e68e8adab94f428b86b388069b07b0d2

Biochemical Function, Molecular Structure and Evolution of an Atypical Thioredoxin Reductase from Desulfovibrio vulgaris

Autor: Odile Valette, Tam T. T. Tran, Christine Cavazza, Elodie Caudeville, Gaël Brasseur, Alain Dolla, Emmanuel Talla, Laetitia Pieulle

Publikováno v: Frontiers in Microbiology, Vol 8 (2017)

Thioredoxin reductase (TR) regulates the intracellular redox environment by reducing thioredoxin (Trx). In anaerobes, recent findings indicate that the Trx redox network is implicated in the global redox regulation of metabolism but also actively par

Externí odkaz: https://doaj.org/article/cda172533480455293bbce9acc48ce1d

Glutamate optimizes enzymatic activity under high hydrostatic pressure in Desulfovibrio species: effects on the ubiquitous thioredoxin system

Autor: H. Gaussier, Corinne Sebban-Kreuzer, Alain Dolla, Olivier Bornet, Nathalie Pradel, E. Champaud, Christian Tamburini, Laetitia Pieulle, Marc Garel, Matthieu Nouailler, Edwige B. Garcin

Publikováno v: Extremophiles
Extremophiles, Springer Verlag, In press
Extremophiles, 2021, 25, pp.385-392. ⟨10.1007/s00792-021-01236-x⟩
HAL
Extremophiles, Springer Verlag, 2021, 25 (4), pp.385-392. ⟨10.1007/s00792-021-01236-x⟩

International audience; In piezophilic microorganisms, enzymes are optimized to perform under high hydrostatic pressure. The two major reported mechanisms responsible for such adaptation in bacterial species are changes in amino acids in the protein

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b0f7e66b19c94e85adc1a9d10687fa93
https://doi.org/10.1007/s00792-021-01236-x

An oxygen reduction chain in the hyperthermophilic anaerobe Thermotoga maritima highlights horizontal gene transfer between Thermococcales and Thermotogales

Autor: Laetitia Pieulle, Céline Brochier-Armanet, Andrei L. Brioukhanov, Alain Dolla, Gaël Brasseur, Bernard Ollivier, Céline Le Fourn

Publikováno v: Environmental Microbiology. 13:2132-2145

The hyperthermophile Thermotoga maritima, although strictly anaerobic, is able to grow in the presence of low amounts of O(2). Here, we show that this bacterium consumes O(2) via a three-partner chain involving an NADH oxidoreductase (NRO), a rubredo

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::10296ea0da8239006368fafdc1e1b04c
https://doi.org/10.1111/j.1462-2920.2011.02439.x

Structure and electron transfer mechanism of pyruvate:ferredoxin oxidoreductase

Autor: Juan C. Fontecilla-Camps, Laetitia Pieulle, M.H. Charon, Anne Volbeda, Eric Chabrière

Publikováno v: Current Opinion in Structural Biology. 9:663-669

The first crystal structure of pyruvate:ferredoxin oxidoreductase to be determined has provided significant new information on its structural organization and redox chemistry. Spectroscopic analyses of a radical reaction intermediate have shed more l

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::79ce8343099b541fe041c8490445e1d9
https://doi.org/10.1016/s0959-440x(99)00027-5