Mobilization of sulfane sulfur from cysteine desulfurases to the Azotobacter vinelandii sulfurtransferase RhdA.
Mobilization of the L-cysteine sulfur for the persulfuration of the rhodanese of Azotobacter vinelandii, RhdA, can be mediated by the A. vinelandii cysteine desulfurases, IscS and NifS. The amount of cysteine was higher in mutant strains lacking rhdA (MV474) than in wild type. The diazotrophic growth of MV474 was impaired. Taking into account the functional results about rhodanese-like proteins and RhdA itself, it is suggested that RhdA-dependent modulation of L-cysteine levels must deal with a redox-related process.
Cartini
Francesca
F
Dipartimento di Scienze Molecolari Agroalimentari, Università degli Studi di Milano, Milan, Italy.
Remelli
William
W
Dos Santos
Patricia C
PC
Papenbrock
Jutta
J
Pagani
Silvia
S
Forlani
Fabio
F
D016948:Azotobacter vinelandii / Q000201:enzymology* / Q000254:growth & development / Q000378:metabolism; D013437:Carbon-Sulfur Lyases / Q000737:chemistry / Q000378:metabolism*; D003545:Cysteine / Q000032:analysis / Q000378:metabolism; D010084:Oxidation-Reduction; D013457:Sulfur Compounds / Q000737:chemistry / Q000378:metabolism*; D013466:Sulfurtransferases / Q000737:chemistry / Q000378:metabolism*
D013457:Sulfur Compounds; D013466:Sulfurtransferases; D013437:Carbon-Sulfur Lyases; C080546:cysteine desulfurase; D003545:Cysteine