Part:BBa_K4028001

Profile

Name: ike2

Base Pairs: 447bp

Origin: Pseudomonas putida KT2440, genome

Properties: Immunity effector in type VI secretion system

Usage and Biology

BBa_K4028001 is a coding sequence of ike2, an immunity protein in Pseudomonas putida KT2440. Ike2 is used for protecting bacteria from type VI secretion system (T6SS).

A wide range of Gram-negative bacteria have been shown to have antibacterial T6SSs, including opportunistic pathogens such as Pseudomonas aeruginosa,[4] obligate commensal species that inhabit the human gut (Bacteroides spp.),[5] and plant-associated bacteria such as Agrobacterium tumefaciens.[6] Under natural conditions, bacterial cells encoding T6SS transport effect factors with cytotoxic or antibacterial effects (amidase, glycoside hydrolyase, lipase, etc.) to recipient cells through physical contact, thus inhibiting the growth of recipient cells. Meanwhile, the bacteria encoding T6SS can translate and produce corresponding immune protein (ike2) to counteract the damage caused by toxic effector factors.[1,2,3]

Figure1. Principle diagram of T6SS.

References

1. Bingle, l.E.H. et al. (2008). Type VI secretion: a beginner’s guide. Current opinion in microbiology. 11:3-8.

2. Silverman, J. M. et al. (2012). Structure and regulation of the type VI secretion system. 66:453-472.

3. Hernandez, R. E. et al. (2020). Type VI secretion system effector protein: Effective weapons for bacterial competitiveness. Cellular microbiology. 22:e13241.

4. Hood RD, . et al (January 2010). "A type VI secretion system ofPseudomonas aeruginosa targets a toxin to bacteria". Cell Host & Microbe. 7 (1): 25–37. doi:10.1016/j.chom.2009.12.007. PMC 2831478. PMID 20114026.

5. Russell AB, . et al (August 2014). "A type VI secretion-related pathway in Bacteroidetes mediates interbacterial antagonism". Cell Host & Microbe. 16 (2): 227–236. doi:10.1016/j.chom.2014.07.007. PMC 4136423. PMID 25070807.

6. Ma LS, . et al (July 2014). "Agrobacterium tumefaciens deploys a superfamily of type VI secretion DNase effectors as weapons for interbacterial competition in planta". Cell Host & Microbe. 16 (1): 94–104. doi:10.1016/j.chom.2014.06.002. PMC 4096383. PMID 24981331.