scholarly journals The Type IV Secretion System of Sinorhizobium meliloti Strain 1021 Is Required for Conjugation but Not for Intracellular Symbiosis

2006 ◽  
Vol 189 (5) ◽  
pp. 2133-2138 ◽  
Author(s):  
Kathryn M. Jones ◽  
Javier Lloret ◽  
Joseph R. Daniele ◽  
Graham C. Walker
Keyword(s):  
Sinorhizobium Meliloti ◽  
Secretion System ◽  
Type Iv Secretion ◽  
Type Iv Secretion System ◽  
Intracellular Pathogens ◽  
Animal Host ◽  
Intracellular Symbiont ◽  
Type Iv ◽  
Meliloti Strain ◽  
Host Invasion

ABSTRACT The type IV secretion system (T4SS) of the plant intracellular symbiont Sinorhizobium meliloti 1021 is required for conjugal transfer of DNA. However, it is not required for host invasion and persistence, unlike the T4SSs of closely related mammalian intracellular pathogens. A comparison of the requirement for a bacterial T4SS in plant versus animal host invasion suggests an important difference in the intracellular niches occupied by these bacteria.

Widespread occurrence of Sinorhizobium meliloti strains with a type IV secretion system

Symbiosis ◽  
2018 ◽  
Vol 75 (2) ◽  
pp. 81-91 ◽  
Author(s):  
Yuanyuan Cao ◽  
Susan S. Miller ◽  
Melinda R. Dornbusch ◽  
Sarah S. Castle ◽  
Peter Lenz ◽  
...  
Keyword(s):  
Sinorhizobium Meliloti ◽  
Secretion System ◽  
Type Iv Secretion ◽  
Type Iv Secretion System ◽  
Widespread Occurrence ◽  
Type Iv

scholarly journals pSymA-Dependent Mobilization of the Sinorhizobium meliloti pSymB Megaplasmid

2010 ◽  
Vol 192 (23) ◽  
pp. 6309-6312 ◽  
Author(s):  
Helena Blanca-Ordóñez ◽  
Juan J. Oliva-García ◽  
Daniel Pérez-Mendoza ◽  
María J. Soto ◽  
José Olivares ◽  
...  
Keyword(s):  
Sinorhizobium Meliloti ◽  
Transcriptional Repressor ◽  
Secretion System ◽  
Type Iv Secretion ◽  
Conjugal Transfer ◽  
Type Iv Secretion System ◽  
Type Iv ◽  
Bacterial Fitness

ABSTRACT Sinorhizobium meliloti 1021 carries two megaplasmids, pSymA of 1,354 kb and pSymB of 1,683 kb, which are essential in establishing symbiosis with its legume hosts and important for bacterial fitness in the rhizosphere. We have previously shown that pSymA is self-transmissible and that its conjugal functions are regulated by the transcriptional repressor RctA. Here, we show conjugal transfer of pSymB as an in trans mobilization event that requires the type IV secretion system encoded by pSymA. pSymB carries a functional oriT and an adjacent relaxase gene, traA2, that is also transcriptionally repressed by rctA. Both symbiotic megaplasmids would require the relaxase genes in cis with their respective oriTs to achieve the highest transfer efficiencies.

scholarly journals Genes for the Type IV Secretion System in an Intracellular Symbiont, Wolbachia, a Causative Agent of Various Sexual Alterations in Arthropods

2000 ◽  
Vol 182 (22) ◽  
pp. 6529-6531 ◽  
Author(s):  
Shinji Masui ◽  
Tetsuhiko Sasaki ◽  
Hajime Ishikawa
Keyword(s):  
Causative Agent ◽  
Pathogenic Bacteria ◽  
Secretion System ◽  
Type Iv Secretion ◽  
Type Iv Secretion System ◽  
Intracellular Bacteria ◽  
Intracellular Symbiont ◽  
Type Iv ◽  
Essential Components ◽  
Genes Encoding

ABSTRACT Wolbachia species are intracellular bacteria known to cause reproductive abnormalities in their hosts. In this study, we identified Wolbachia genes encoding homologs to the type IV secretion system by which many pathogenic bacteria secrete macromolecules. The genes identified encoded most of the essential components of the secretion system and were cotranscribed as an operon.

High prevalence of functional type IV secretion system for CagA protein in Japanese clinical Helicobacter pylori

2001 ◽  
Vol 120 (5) ◽  
pp. A652-A653
Author(s):  
Y HIRATA ◽  
S MAEDA ◽  
Y MITUNO ◽  
M AKANUMA ◽  
T KAWABE ◽  
...  
Keyword(s):  
Helicobacter Pylori ◽  
Secretion System ◽  
Type Iv Secretion ◽  
Type Iv Secretion System ◽  
Functional Type ◽  
Caga Protein ◽  
Type Iv ◽  
High Prevalence

scholarly journals 814 – Helicobacter Pylori Induces Aberrant Lrig1 Stem Cell Activity Within the Stomach in a Cag Type Iv Secretion System-Dependent Manner

2019 ◽  
Vol 156 (6) ◽  
pp. S-171-S-172 ◽  
Author(s):  
Lydia Wroblewski ◽  
Eunyoung Choi ◽  
Christine Petersen ◽  
Alberto Delgado ◽  
M. Blanca Piazuelo ◽  
...  
Keyword(s):  
Helicobacter Pylori ◽  
Stem Cell ◽  
Cell Activity ◽  
Secretion System ◽  
Type Iv Secretion ◽  
Type Iv Secretion System ◽  
Dependent Manner ◽  
Type Iv ◽  
Stem Cell Activity
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