cytoplasmic sulfurtransferases in the purple sulfur bacterium allochromatium vinosum evidence for sulfur transfer from dsrefh to dsrc紫色硫细菌的细胞质sulfurtransferases allochromatium vinosum硫转移从dsrefh dsrc的证据.pdfVIP

Cytoplasmic Sulfurtransferases in the Purple Sulfur Bacterium Allochromatium vinosum: Evidence for Sulfur Transfer from DsrEFH to DsrC 1 2 3 3 ˆ 2 Yvonne Stockdreher , Sofia S. Venceslau , Michaele Josten , Hans-Georg Sahl , Ines A. C. Pereira , Christiane Dahl1* ¨ ¨ ´ ´ 1 Institut fur Mikrobiologie and Biotechnologie, Rheinische Friedrich-Wilhelms-Universitat Bonn, Bonn, Germany, 2 Instituto de Tecnologia Quımica e Biologica, ´ ¨ Universidade Nova de Lisboa, Avenida da Republica, Oeiras, Portugal, 3 Institut fur Medizinische Mikrobiologie, Immunologie and Parasitologie, Abteilung ¨ Pharmazeutische Mikrobiologie, Rheinische Friedrich-Wilhelms-Universitat Bonn, Bonn, Germany Abstract While the importance of sulfur transfer reactions is well established for a number of biosynthetic pathways, evidence has only started to emerge that sulfurtransferases may also be major players in sulfur-based microbial energy metabolism. Among the first organisms studied in this regard is the phototrophic purple sulfur bacterium Allochromatium vinosum. During the oxidation of reduced sulfur species to sulfate this Gammaproteobacterium accumulates sulfur globules. Low molecular weight organic persulfides have been proposed as carrier molecules transferring sulfur from the periplasmic sulfur glob