Enzymes
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Reaction participants Show >> << Hide
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Namehelp_outline
[DsrC protein]-dithiol
Identifier
RHEA-COMP:11723
Reactive part
help_outline
- Name help_outline L-cysteine residue Identifier CHEBI:29950 Charge 0 Formula C3H5NOS Positionhelp_outline C1 SMILEShelp_outline C(=O)(*)[C@@H](N*)CS 2D coordinates Mol file for the small molecule Search links Involved in 127 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline L-cysteine residue Identifier CHEBI:29950 Charge 0 Formula C3H5NOS Positionhelp_outline C2 SMILEShelp_outline C(=O)(*)[C@@H](N*)CS 2D coordinates Mol file for the small molecule Search links Involved in 127 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline a quinone Identifier CHEBI:132124 Charge 0 Formula C6O2R4 SMILEShelp_outline O=C1C(*)=C(*)C(=O)C(*)=C1* 2D coordinates Mol file for the small molecule Search links Involved in 130 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline hydrogen sulfide Identifier CHEBI:29919 (CAS: 15035-72-0) help_outline Charge -1 Formula HS InChIKeyhelp_outline RWSOTUBLDIXVET-UHFFFAOYSA-M SMILEShelp_outline [S-][H] 2D coordinates Mol file for the small molecule Search links Involved in 56 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline H+ Identifier CHEBI:15378 Charge 1 Formula H InChIKeyhelp_outline GPRLSGONYQIRFK-UHFFFAOYSA-N SMILEShelp_outline [H+] 2D coordinates Mol file for the small molecule Search links Involved in 9,717 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
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Namehelp_outline
[DsrC protein]-trisulfide
Identifier
RHEA-COMP:19152
Reactive part
help_outline
- Name help_outline di-L-cysteinyl-trisulfide residue Identifier CHEBI:229579 Charge 0 Formula C6H8N2O2S3 SMILEShelp_outline C(C(N*)CSSSCC(C(=O)*)N*)(=O)* 2D coordinates Mol file for the small molecule Search links Involved in 2 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline a quinol Identifier CHEBI:24646 Charge 0 Formula C6H2O2R4 SMILEShelp_outline OC1=C(*)C(*)=C(O)C(*)=C1* 2D coordinates Mol file for the small molecule Search links Involved in 249 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
Cross-references
| RHEA:78839 | RHEA:78840 | RHEA:78841 | RHEA:78842 | |
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| Reaction direction help_outline | undefined | left-to-right | right-to-left | bidirectional |
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Publications
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A protein trisulfide couples dissimilatory sulfate reduction to energy conservation.
Santos A.A., Venceslau S.S., Grein F., Leavitt W.D., Dahl C., Johnston D.T., Pereira I.A.
Microbial sulfate reduction has governed Earth's biogeochemical sulfur cycle for at least 2.5 billion years. However, the enzymatic mechanisms behind this pathway are incompletely understood, particularly for the reduction of sulfite-a key intermediate in the pathway. This critical reaction is per ... >> More
Microbial sulfate reduction has governed Earth's biogeochemical sulfur cycle for at least 2.5 billion years. However, the enzymatic mechanisms behind this pathway are incompletely understood, particularly for the reduction of sulfite-a key intermediate in the pathway. This critical reaction is performed by DsrAB, a widespread enzyme also involved in other dissimilatory sulfur metabolisms. Using in vitro assays with an archaeal DsrAB, supported with genetic experiments in a bacterial system, we show that the product of sulfite reduction by DsrAB is a protein-based trisulfide, in which a sulfite-derived sulfur is bridging two conserved cysteines of DsrC. Physiological studies also reveal that sulfate reduction rates are determined by cellular levels of DsrC. Dissimilatory sulfate reduction couples the four-electron reduction of the DsrC trisulfide to energy conservation. << Less