KEGG   PATHWAY: mop00920Help
Entry
mop00920                    Pathway                                

Name
Sulfur metabolism - Mesorhizobium opportunistum
Description
Sulfur is an essential element for life and the metabolism of organic sulfur compounds plays an important role in the global sulfur cycle. Sulfur occurs in various oxidation states ranging from +6 in sulfate to -2 in sulfide (H2S). Sulfate reduction can occur in both an energy consuming assimilatory pathway and an energy producing dissimilatory pathway. The assimilatory pathway, which is found in a wide range of organisms, produces reduced sulfur compounds for the biosynthesis of S-containing amino acids and does not lead to direct excretion of sulfide. In the dissimilatory pathway, which is restricted to obligatory anaerobic bacterial and archaeal lineages, sulfate (or sulfur) is the terminal electron acceptor of the respiratory chain producing large quantities of inorganic sulfide. Both pathways start from the activation of sulfate by reaction with ATP to form adenylyl sulfate (APS). In the assimilatory pathway [MD:M00176] APS is converted to 3'-phosphoadenylyl sulfate (PAPS) and then reduced to sulfite, and sulfite is further reduced to sulfide by the assimilatory sulfite reductase. In the dissimilatory pathway [MD:M00596] APS is directly reduced to sulfite, and sulfite is further reduced to sulfide by the dissimilatory sulfite reductase. The capacity for oxidation of sulfur is quite widespread among bacteria and archaea, comprising phototrophs and chemolithoautotrophs. The SOX (sulfur-oxidation) system [MD:M00595] is a well-known sulfur oxidation pathway and is found in both photosynthetic and non-photosynthetic sulfur-oxidizing bacteria. Green sulfur bacteria and purple sulfur bacteria carry out anoxygenic photosynthesis with reduced sulfur compounds such as sulfide and elemental sulfur, as well as thiosulfate (in some species with the SOX system), as the electron donor for photoautotrophic growth. In some chemolithoautotrophic sulfur oxidizers (such as Thiobacillus denitrificans), it has been suggested that dissimilatory sulfur reduction enzymes operate in the reverse direction, forming a sulfur oxidation pathway from sulfite to APS and then to sulfate.
Class
Metabolism; Energy metabolism
BRITE hierarchy
Pathway map
Sulfur metabolism
mop00920

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GO: 
Organism
Mesorhizobium opportunistum [GN:mop]
Gene
sulfate ABC transporter periplasmic sulfate-binding protein; K02048 sulfate transport system substrate-binding protein [KO:K02048]
sulfate ABC transporter periplasmic sulfate-binding protein; K02048 sulfate transport system substrate-binding protein [KO:K02048]
sulfate ABC transporter periplasmic sulfate-binding protein; K02048 sulfate transport system substrate-binding protein [KO:K02048]
sulfate ABC transporter inner membrane subunit CysT; K02046 sulfate transport system permease protein [KO:K02046]
sulfate ABC transporter inner membrane subunit CysT; K02046 sulfate transport system permease protein [KO:K02046]
sulfate ABC transporter inner membrane subunit CysW; K02047 sulfate transport system permease protein [KO:K02047]
sulfate ABC transporter inner membrane subunit CysW; K02047 sulfate transport system permease protein [KO:K02047]
sulfate ABC transporter ATPase; K02045 sulfate transport system ATP-binding protein [EC:3.6.3.25] [KO:K02045] [EC:3.6.3.25]
sulfate ABC transporter ATPase; K02045 sulfate transport system ATP-binding protein [EC:3.6.3.25] [KO:K02045] [EC:3.6.3.25]
taurine ABC transporter periplasmic binding protein; K15551 taurine transport system substrate-binding protein [KO:K15551]
binding-protein-dependent transport systems inner membrane component; K15552 taurine transport system permease protein [KO:K15552]
ABC transporter; K10831 taurine transport system ATP-binding protein [EC:3.6.3.36] [KO:K10831] [EC:3.6.3.36]
NMT1/THI5 like domain-containing protein; K15553 sulfonate transport system substrate-binding protein [KO:K15553]
binding-protein-dependent transport systems inner membrane component; K15554 sulfonate transport system permease protein [KO:K15554]
ABC transporter; K15555 sulfonate transport system ATP-binding protein [EC:3.6.3.-] [KO:K15555] [EC:3.6.3.-]
hypothetical protein; K04091 alkanesulfonate monooxygenase [EC:1.14.14.5] [KO:K04091] [EC:1.14.14.5]
alkanesulfonate monooxygenase; K04091 alkanesulfonate monooxygenase [EC:1.14.14.5] [KO:K04091] [EC:1.14.14.5]
sulfate adenylyltransferase; K00955 bifunctional enzyme CysN/CysC [EC:2.7.7.4 2.7.1.25] [KO:K00955] [EC:2.7.1.25 2.7.7.4]
sulfate adenylyltransferase; K00955 bifunctional enzyme CysN/CysC [EC:2.7.7.4 2.7.1.25] [KO:K00955] [EC:2.7.1.25 2.7.7.4]
sulfate adenylyltransferase; K00957 sulfate adenylyltransferase subunit 2 [EC:2.7.7.4] [KO:K00957] [EC:2.7.7.4]
sulfate adenylyltransferase; K00957 sulfate adenylyltransferase subunit 2 [EC:2.7.7.4] [KO:K00957] [EC:2.7.7.4]
3'(2'); K01082 3'(2'), 5'-bisphosphate nucleotidase [EC:3.1.3.7] [KO:K01082] [EC:3.1.3.7]
phosphoadenosine phosphosulfate reductase; K00390 phosphoadenosine phosphosulfate reductase [EC:1.8.4.8] [KO:K00390] [EC:1.8.4.8]
cytochrome c class I; K08738 cytochrome c [KO:K08738]
cytochrome c class I; K08738 cytochrome c [KO:K08738]
nitrite and sulfite reductase 4Fe-4S region; K00381 sulfite reductase (NADPH) hemoprotein beta-component [EC:1.8.1.2] [KO:K00381] [EC:1.8.1.2]
Rhodanese domain-containing protein; K01011 thiosulfate/3-mercaptopyruvate sulfurtransferase [EC:2.8.1.1 2.8.1.2] [KO:K01011] [EC:2.8.1.2 2.8.1.1]
serine O-acetyltransferase; K00640 serine O-acetyltransferase [EC:2.3.1.30] [KO:K00640] [EC:2.3.1.30]
cysteine synthase A; K01738 cysteine synthase A [EC:2.5.1.47] [KO:K01738] [EC:2.5.1.47]
cysteine synthase A; K01738 cysteine synthase A [EC:2.5.1.47] [KO:K01738] [EC:2.5.1.47]
Pyridoxal-5'-phosphate-dependent protein beta subunit; K01738 cysteine synthase A [EC:2.5.1.47] [KO:K01738] [EC:2.5.1.47]
Pyridoxal-5'-phosphate-dependent protein beta subunit; K01738 cysteine synthase A [EC:2.5.1.47] [KO:K01738] [EC:2.5.1.47]
Pyridoxal-5'-phosphate-dependent protein beta subunit; K01738 cysteine synthase A [EC:2.5.1.47] [KO:K01738] [EC:2.5.1.47]
O-succinylhomoserine sulfhydrylase; K10764 O-succinylhomoserine sulfhydrylase [EC:2.5.1.-] [KO:K10764] [EC:2.5.1.-]
luciferase-like protein; K17228 FMNH2-dependent dimethyl sulfone monooxygenase [KO:K17228]
Compound
C00033  
Acetate
C00042  
Succinate
C00053  
3'-Phosphoadenylyl sulfate
C00054  
Adenosine 3',5'-bisphosphate
C00059  
Sulfate
C00065  
L-Serine
C00087  
Sulfur
C00094  
Sulfite
C00097  
L-Cysteine
C00155  
L-Homocysteine
C00224  
Adenylyl sulfate
C00245  
Taurine
C00263  
L-Homoserine
C00283  
Hydrogen sulfide
C00320  
Thiosulfate
C00409  
Methanethiol
C00580  
Dimethyl sulfide
C00979  
O-Acetyl-L-serine
C01118  
O-Succinyl-L-homoserine
C01861  
Trithionate
C02084  
Tetrathionate
C03920  
2-(Methylthio)ethanesulfonate
C04022  
S,S-Dimethyl-beta-propiothetin
C08276  
3-(Methylthio)propionic acid
C11142  
Dimethyl sulfone
C11143  
Dimethyl sulfoxide
C11145  
Methanesulfonic acid
C15521  
Alkanesulfonate
C19692  
Polysulfide
Reference
  Authors
Grein F, Ramos AR, Venceslau SS, Pereira IA
  Title
Unifying concepts in anaerobic respiration: Insights from dissimilatory sulfur metabolism.
  Journal
Biochim Biophys Acta 1827:145-60 (2013)
Reference
  Authors
Fauque GD, Barton LL
  Title
Hemoproteins in dissimilatory sulfate- and sulfur-reducing prokaryotes.
  Journal
Adv Microb Physiol 60:1-90 (2012)
Reference
  Authors
Sakurai H, Ogawa T, Shiga M, Inoue K
  Title
Inorganic sulfur oxidizing system in green sulfur bacteria.
  Journal
Photosynth Res 104:163-76 (2010)
Reference
  Authors
Falkenby LG, Szymanska M, Holkenbrink C, Habicht KS, Andersen JS, Miller M, Frigaard NU
  Title
Quantitative proteomics of Chlorobaculum tepidum: insights into the sulfur metabolism of a phototrophic green sulfur bacterium.
  Journal
FEMS Microbiol Lett 323:142-50 (2011)
Reference
  Authors
Gregersen LH, Bryant DA, Frigaard NU
  Title
Mechanisms and evolution of oxidative sulfur metabolism in green sulfur bacteria.
  Journal
Front Microbiol 2:116 (2011)
Reference
  Authors
Beller HR, Chain PS, Letain TE, Chakicherla A, Larimer FW, Richardson PM, Coleman MA, Wood AP, Kelly DP.
  Title
The genome sequence of the obligately chemolithoautotrophic, facultatively anaerobic bacterium Thiobacillus denitrificans.
  Journal
J Bacteriol 188:1473-88 (2006)
Reference
PMID:9695921
  Authors
Pott AS, Dahl C
  Title
Sirohaem sulfite reductase and other proteins encoded by genes at the dsr locus of Chromatium vinosum are involved in the oxidation of intracellular sulfur.
  Journal
Microbiology 144 ( Pt 7):1881-94 (1998)
Reference
  Authors
Frigaard NU, Dahl C
  Title
Sulfur metabolism in phototrophic sulfur bacteria.
  Journal
Adv Microb Physiol 54:103-200 (2009)
KO pathway
 

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