Abstract
PE_PGRS proteins localize in the mycobacterial cell wall and the cell wall localization of PE_PGRS33 has been shown to be attributed to its PE domain. In this study, we expressed deletion mutants of PE_PGRS30 in Mycobacterium smegmatis to characterize the role of its domains in protein localization. It was revealed that, apart from the PE domain, the C-terminal domain present in few PE_PGRS proteins carries individual cell wall localization signals. Proteinase K sensitivity assay showed that PE_PGRS30 is exposed on the mycobacterial surface through its PGRS domain. PGRS domain was also shown to be responsible for polar localization of PE_PGRS30.
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