Fast conformational exchange between the sulfur-free and persulfide-bound rhodanese domain of E. coli YgaP
- Hefei National Laboratory for Physical Sciences at the Microscale and School of Life Sciences, University of Science and Technology of China, Hefei, Anhui 230026 (China)
- High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei, Anhui 230031 (China)
Highlights: • Three dimensional solution NMR structure of YgaP rhodanese domain. • Function validation of YgaP rhodanese domain to substrate Na{sub 2}S{sub 2}O{sub 3}. • Fast exchange between the intact and persulfide-intermediate rhodanese domain. - Abstract: Rhodanese domains are abundant structural modules that catalyze the transfer of a sulfur atom from thiolsulfates to cyanide via formation of a covalent persulfide intermediate that is bound to an essential conserved cysteine residue. In this study, the three-dimensional structure of the rhodanese domain of YgaP from Escherichia coli was determined using solution NMR. A typical rhodanese domain fold was observed, as expected from the high homology with the catalytic domain of other sulfur transferases. The initial sulfur-transfer step and formation of the rhodanese persulfide intermediate were monitored by addition of sodium thiosulfate using two-dimensional {sup 1}H–{sup 15}N correlation spectroscopy. Discrete sharp signals were observed upon substrate addition, indicting fast exchange between sulfur-free and persulfide-intermediate forms. Residues exhibiting pronounced chemical shift changes were mapped to the structure, and included both substrate binding and surrounding residues.
- OSTI ID:
- 22416760
- Journal Information:
- Biochemical and Biophysical Research Communications, Journal Name: Biochemical and Biophysical Research Communications Journal Issue: 3 Vol. 452; ISSN 0006-291X; ISSN BBRCA9
- Country of Publication:
- United States
- Language:
- English
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