%A Ranjana Tripathi
%A Vikas Kaithwas
%A Chetna Dureja
%A Saumya Raychaudhuri
%O Copyright of this article belongs to Elsevier.
%J Gene
%T Alanine-scanning mutagenesis of WH2 domains of VopF reveals residues important for conferring lethality in a Saccharomyces cerevisiae model.
%X VopF, the type III effector molecule, has been implicated in the pathogenesis of non-O1, non-O139 strains of Vibrio cholerae. It is a protein of 530 amino acids, comprises of one formin homology 1-like (FH1-like) domain and three WASP homology 2 (WH2) domains. Previous works have demonstrated that WH2 domains are crucial for VopF function as a modulator of cellular actin homeostasis. Furthermore, domain deletion analysis also suggests that VopF variant constituted with only WH2 domain 3 is more efficient in restricting the growth of budding yeast than its congeners containing either only domain 1 or domain 2. Interestingly, a good degree of sequence diversity is present within each WH2 domain of VopF. In order to ascertain the importance of different amino acids in each WH2 domain, a systemic alanine scanning mutagenesis was employed. Using a yeast model system, the alanine derivatives of each amino acid of WH2 domain 1 and 3 of VopF were examined for growth restricting activity. Taken together, our mutagenesis results reveal the identification of critical residues of WH2 domain 1 and 3 of VopF.
%N 1
%K ype III effector proteinVibrio cholerae
%P 116-23
%V 525
%D 2013
%I Elsevier Science Ltd
%L open2118