Antioxidative system of Deinococcus radiodurans
Publication date: Available online 19 November 2019Source: Research in MicrobiologyAuthor(s): Hui-zhou Qi, Wu-zhou Wangi, Jun-yan He, Yun Ma, Fang-zhu Xiao, Shu-ya HeAbstractDeinococcus radiodurans is famous for its extreme resistance to various stresses such as ionizing radiation (IR), desiccation and oxidative stress. The underlying mechanism of exceptional resistance of this robust bacterium still remained unclear. However, the antioxidative system of D. radiodurans has been considered to be the determinant factor for its unparalleled resistance and protects the proteome during stress, then the DNA repair system and met...
Source: Research in Microbiology - November 21, 2019 Category: Microbiology Source Type: research
Original sequence divergence among Pseudomonas putida CadRs drive specificity
Publication date: Available online 12 November 2019Source: Research in MicrobiologyAuthor(s): Julien Cayron, Géraldine Effantin, Elsa Prudent, Agnès RodrigueSummaryBacteria, especially those living in soils, are in constant contact with metals. Transition metals like Fe or Zn, are required for proper growth. Some other metals like Cd or Hg are only toxic. Several systems exist to detoxify cells when these metals are present in concentrations harmful to biological systems. The expression of these systems is under control of specialized regulatory proteins able to detect metals and to regulate cognate detoxifying systems. ...
Source: Research in Microbiology - November 12, 2019 Category: Microbiology Source Type: research
Between Computational Predictions and High-Throughput Transcriptional Profiling: in Depth Expression Analysis of the OppB Trans-Membrane Subunit of E. coli OppABCDF Oligopeptide Transporter
Publication date: Available online 5 November 2019Source: Research in MicrobiologyAuthor(s): Irina S. Masulis, Natalia A. Sukharycheva, Sergey S. Kiselev, Zaira Sh. Andreeva, Olga N. OzolineAbstractBacterial oligopeptide transporters encoded by arrays of opp genes are implicated in a wide variety of physiological functions including nutrient acquisition, cell-to-cell communication, host-pathogen interaction. Combining the five opp genes in one oppABCDF operon of E. coli assumes unified principle of their transcriptional regulation, which should provide a comparable amounts of translated products. This, however, contradicts...
Source: Research in Microbiology - November 6, 2019 Category: Microbiology Source Type: research
Bacterial ABC transporters of iron containing compounds
Publication date: Available online 1 November 2019Source: Research in MicrobiologyAuthor(s): Philippe DelepelaireAbstractIron acquisition is an essential aspect of cell physiology for most bacteria. Although much is known about how bacteria initially recognize the various iron sources they can encounter, whether siderophore, heme, host iron/heme binding proteins, much less is known about how the iron containing compounds (Fe2+, Fe3+, Fe3+-siderophore complex or heme) are transported across the cytoplasmic membrane. This last transport step is powered by specific ABC (ATP-Binding-Cassette) transporters, made up of a substra...
Source: Research in Microbiology - November 1, 2019 Category: Microbiology Source Type: research
Contrasting Arsenic biogeochemical cycling in two Moroccan alkaline pit lakes
Publication date: Available online 1 November 2019Source: Research in MicrobiologyAuthor(s): Marina Héry, Angélique Desoeuvre, El Mehdi Benyassine, Odile Bruneel, Sophie Delpoux, Eléonore Resongles, Abdelilah Dekayir, Corinne CasiotAbstractPit lakes resulting from the flooding of abandoned mines represent a valuable freshwater reserve. However, water contamination by toxic elements, including arsenic, compromises their use for freshwater supply. For a better management of these reserves, our aim was to gain insight into arsenic cycling in two Moroccan alkaline pit lakes. We first showed that dimethylarsenic dominated in...
Source: Research in Microbiology - November 1, 2019 Category: Microbiology Source Type: research
Type VI secretion system is not required for virulence on rice but for inter-bacterial competition in Xanthomonas oryzae pv. oryzicola
In this study, we identified two phylogenetically distinct T6SS clusters, T6SS1 and T6SS2, in a newly sequenced Chinese strain GX01 of Xanthomonas oryzea pv. oryzicola (Xoc) which causes bacterial leaf streak (BLS) of rice (Oryza sativa L.). Mutational assays demonstrated that T6SS1 and T6SS2 are not required for the virulence of Xoc GX01 on rice. Nevertheless, we found that T6SS2, but not T6SS1, played an important role in bacterial killing. Transcription and secretion analysis revealed that hcp2 gene is actively expressed and that Hcp2 protein is secreted via T6SS. Moreover, several candidate T6SS effectors were predicte...
Source: Research in Microbiology - October 31, 2019 Category: Microbiology Source Type: research
ABC Systems: structural and functional variations on a common theme
Publication date: Available online 25 October 2019Source: Research in MicrobiologyAuthor(s): Grégory Boel, Cédric Orelle, Jean-Michel Jault, Elie Dassa (Source: Research in Microbiology)
Source: Research in Microbiology - October 25, 2019 Category: Microbiology Source Type: research
Type III effectors xopN and avrBS2 contribute to the virulence of Xanthomonas oryzae pv. oryzicola strain GX01
Publication date: Available online 24 October 2019Source: Research in MicrobiologyAuthor(s): Zhou-Xiang Liao, Jian-Yuan Li, Xiu-Yu Mo, Zhe Ni, Wei Jiang, Yong-Qiang He, Sheng HuangAbstractXanthomonas oryzae pv. oryzicola (Xoc) depends on its type III secretion system (T3SS) to translocate type III secreted effectors (T3SEs), including transcription activator-like effectors (TALEs) and non-transcription activator-like effectors (non-TALEs), into host cells. T3SEs can promote the colonization of Xoc and contribute to virulence by manipulating host cell physiology. We annotated 25 genes encoding non-TALEs in Xoc strain GX01, ...
Source: Research in Microbiology - October 25, 2019 Category: Microbiology Source Type: research
Genome insights of mercury methylation among Desulfovibrio and Pseudodesulfovibrio strains
Publication date: Available online 23 October 2019Source: Research in MicrobiologyAuthor(s): Marisol Goni-Urriza, Christophe Klopp, Magali Ranchou-Peyruse, Anthony Ranchou-Peyruse, Mathilde Monperrus, Bahia Khalfaoui-Hassani, Rémy GuyoneaudAbstractMercury methylation converts inorganic mercury into the toxic methylmercury, and the consequences of this transformation are worrisome for human health and the environment. This process is performed by anaerobic microorganisms, such as several strains related to Pseudodesulfovibrio and Desulfovibrio genera. In order to provide new insights into the molecular mechanisms of mercur...
Source: Research in Microbiology - October 23, 2019 Category: Microbiology Source Type: research
Editorial board
Publication date: September–October 2019Source: Research in Microbiology, Volume 170, Issues 6–7Author(s): (Source: Research in Microbiology)
Source: Research in Microbiology - October 19, 2019 Category: Microbiology Source Type: research
Structure and gene cluster of the capsular polysaccharide of multidrug resistant carbapenemase OXA-48-producing Klebsiella pneumoniae strain KPB536 of the genetic line ST147
Publication date: Available online 10 October 2019Source: Research in MicrobiologyAuthor(s): Nikolay V. Volozhantsev, Anna M. Shpirt, Angelina A. Kislichkina, Alexander S. Shashkov, Vladimir V. Verevkin, Nadezhda K. Fursova, Yuriy A. KnirelAbstractThe Gram-negative opportunistic pathogen Klebsiella pneumoniae is a significant cause of community-acquired and healthcare-associated infections for which multidrug resistance is a concern worldwide. A major virulence determinant of K. pneumoniae is a polysaccharide capsule (CPS) which forms a barrier around the bacterial cell wall, providing protection from environmental pressur...
Source: Research in Microbiology - October 11, 2019 Category: Microbiology Source Type: research
In situ metabolic activities of uncultivated Ferrovum sp. CARN8 evidenced by metatranscriptomic analysis
Publication date: Available online 10 October 2019Source: Research in MicrobiologyAuthor(s): Frédéric Plewniak, Sandrine Koechler, Denis Le Paslier, Marina Héry, Odile Bruneel, Philippe N. BertinAbstractAmongst iron-oxidizing bacteria playing a key role in the natural attenuation of arsenic in acid mine drainages (AMDs), members of the Ferrovum genus were identified in mine effluent or water treatment plants, and were shown to dominate biogenic precipitates in field pilot experiments. In order to address the question of the in situ activity of the uncultivated Ferrovum sp. CARN8 strain in the Carnoulès AMD, we assemble...
Source: Research in Microbiology - October 10, 2019 Category: Microbiology Source Type: research
Erratum to “Description of Klebsiella africanensis sp. nov., Klebsiella variicola subsp. tropicalensis subsp. nov. and Klebsiella variicola subsp. variicola subsp. nov.” [Res Microbiol 170 (3) (2019) 165–170]
Publication date: Available online 5 October 2019Source: Research in MicrobiologyAuthor(s): Carla Rodrigues, Virginie Passet, Andriniaina Rakotondrasoa, Thierno Abdoulaye Diallo, Alexis Criscuolo, Sylvain Brisse (Source: Research in Microbiology)
Source: Research in Microbiology - October 6, 2019 Category: Microbiology Source Type: research
Symmetric dimethylation on histone H4R3 associates with histone deacetylation to maintain properly polarized cell growth
Publication date: Available online 28 September 2019Source: Research in MicrobiologyAuthor(s): Ruxin Duan, Hong-Yeoul Ryu, Seong Hoon AhnAbstractYeast Hsl7 is recognized as a homolog of human arginine methyltransferase 5 (PRMT5) and shows type II PRMT activity by forming symmetric dimethylarginine residues on histones. Previously, we reported that Hsl7 is responsible for in vivo symmetric dimethylation on histone H4 arginine 3 (H4R3me2s) in a transcriptionally repressed state, possibly in association with histone deacetylation by Rpd3. Here, we investigated the function of Hsl7 during cell cycle progression. We found that ...
Source: Research in Microbiology - September 28, 2019 Category: Microbiology Source Type: research
ABC-F proteins in mRNA translation and antibiotic resistance
Publication date: Available online 26 September 2019Source: Research in MicrobiologyAuthor(s): Farés Ousalem, Shikha Singh, Olivier Chesneau, John F. Hunt, Grégory BoëlAbstractThe ATP binding cassette protein superfamily comprises ATPase enzymes which are, for the most part, involved in transmembrane transport. Within this superfamily however, some protein families have other functions unrelated to transport. One example is the ABC-F family, which comprises an extremely diverse set of cytoplasmic proteins. All of the proteins in the ABC-F family characterized to date act on the ribosome and are translation factors. Thei...
Source: Research in Microbiology - September 27, 2019 Category: Microbiology Source Type: research
