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- W2002085195 abstract "HslVU in E. coli is a new type of ATP-dependent protease consisting of two heat shock proteins: the HslU ATPase and the HslV peptidase that has two repeated Thr residues at its N terminus, like certain beta-type subunit of the 20S proteasomes. To gain an insight into the catalytic mechanism of HslV, site-directed mutagenesis was performed to replace each of the Thr residues with Ser or Val and to delete the first or both Thr. Also each of the five internal Ser residues in HslV were replaced with Ala. The results obtained by the mutational analysis revealed that the N-terminal Thr acts as the active site nucleophile and that certain Ser residues, particularly Ser124 and Ser172, also contribute to the peptide hydrolysis by the HslVU protease. The mutational studies also revealed that both Thr, Ser103, and Ser172, but not Ser124, are involved in the interaction of HslV with HslU and hence in the activation of HslU ATPase as well as in the HslVU complex formation." @default.
- W2002085195 created "2016-06-24" @default.
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- W2002085195 date "1997-07-21" @default.
- W2002085195 modified "2023-09-26" @default.
- W2002085195 title "Mutagenesis of two N-terminal Thr and five Ser residues in HslV, the proteolytic component of the ATP-dependent HslVU protease" @default.
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- W2002085195 doi "https://doi.org/10.1016/s0014-5793(97)00742-4" @default.
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