TY  - JOUR
A1  - Grabarczyk, Daniel B.
A1  - Berks, Ben C.
T1  - Intermediates in the Sox sulfur oxidation pathway are bound to a sulfane conjugate of the carrier protein SoxYZ
JF  - PLoS ONE
N2  - The Sox pathway found in many sulfur bacteria oxidizes thiosulfate to sulfate. Pathway intermediates are covalently bound to a cysteine residue in the carrier protein SoxYZ. We have used biochemical complementation by SoxYZ-conjugates to probe the identity of the intermediates in the Sox pathway. We find that unconjugated SoxYZ and SoxYZ-S-sulfonate are unlikely to be intermediates during normal turnover in disagreement with current models. By contrast, conjugates with multiple sulfane atoms are readily metabolised by the Sox pathway. The most parsimonious interpretation of these data is that the true carrier species in the Sox pathway is a SoxYZ-S-sulfane adduct.
KW  - thiosulfates
KW  - oxidation
KW  - sulfur
KW  - cysteine
KW  - sulfides
KW  - thermodynamics
KW  - sulfates
KW  - sulfites
Y1  - 2017
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-171147
VL  - 12
IS  - 3
ER  -