Activity of Chi Recombinational Hotspots in Salmonella Typhimurium
Overview
Authors
Affiliations
Chi sites have previously been shown to stimulate homologous recombination by the Escherichia coli RecBC pathway. To test the activity of Chi in another organism, bacteriophage lambda crosses were carried out in Salmonella typhimurium strains bearing the E. coli lambda receptor protein. Chi is active in these crosses in S. typhimurium, but is less active than in the same crosses carried out in E. coli. The lower Chi activity in S. typhimurium appears to be intrinsic to the S. typhimurium RecBC enzyme, since the Chi activity in E. coli-S. typhimurium hybrids depends on the species of origin of their RecBC enzyme. For these studies we constructed and F' factor and a pBR322-derived plasmid carrying the thyA+ recC+ recB+ argA+ region of the S. typhimurium chromosome.
A flexible RecC surface loop required for Chi hotspot control of RecBCD enzyme.
Amundsen S, Richardson A, Ha K, Smith G Genetics. 2022; 223(3).
PMID: 36521180 PMC: 9991510. DOI: 10.1093/genetics/iyac175.
Subramaniam S, Smith G Adv Genet. 2022; 109:1-37.
PMID: 36334915 PMC: 10047805. DOI: 10.1016/bs.adgen.2022.06.001.
Wang Z, Zhu S, Li C, Lyu L, Yu J, Wang D Emerg Microbes Infect. 2022; 11(1):1554-1571.
PMID: 35603550 PMC: 9176671. DOI: 10.1080/22221751.2022.2081618.
Evolution of Chi motifs in Proteobacteria.
Buton A, Bobay L G3 (Bethesda). 2021; 11(1).
PMID: 33561247 PMC: 8022716. DOI: 10.1093/g3journal/jkaa054.
Amundsen S, Sharp J, Smith G Genetics. 2016; 204(1):139-52.
PMID: 27401752 PMC: 5012381. DOI: 10.1534/genetics.116.191056.