Alto NM~Dixon JE, 2006

Pubmed ID 16413487
Title Identification of a bacterial type III effector family with G protein mimicry functions.
Authors Neal M Alto, Feng Shao, Cheri S Lazar, Renee L Brost, Gordon Chua, Seema Mattoo, Stephen A McMahon, Partho Ghosh, Timothy R Hughes, Charles Boone, Jack E Dixon
Abstract Many bacterial pathogens use the type III secretion system to inject "effector" proteins into host cells. Here, we report the identification of a 24 member effector protein family found in pathogens including Salmonella, Shigella, and enteropathogenic E. coli. Members of this family subvert host cell function by mimicking the signaling properties of Ras-like GTPases. The effector IpgB2 stimulates cellular responses analogous to GTP-active RhoA, whereas IpgB1 and Map function as the active forms of Rac1 and Cdc42, respectively. These effectors do not bind guanine nucleotides or have sequences corresponding the conserved GTPase domain, suggesting that they are functional but not structural mimics. However, several of these effectors harbor intracellular targeting sequences that contribute to their signaling specificities. The activities of IpgB2, IpgB1, and Map are dependent on an invariant WxxxE motif found in numerous effectors leading to the speculation that they all function by a similar molecular mechanism.
Citation Cell 2006; 124:133-45
Data abstract Deletion collection was assayed for growth with expression of pathogenic protein IpgB2 (from Shigella flexneri).


Download the list of datasets
Paper Phenotype Condition Medium Collection Tested mutants Data Details
Alto NM~Dixon JE, 2006 growth (colony size) IpgB2 effector protein SC - Ura, Gal [2%] hap a (post-SGA) 4,293 Discrete

Curation history

Tested strains

Nov. 13, 2014 Loaded.


Nov. 13, 2014 Loaded.