Identification
YMDB IDYMDB00968
NameSiroheme
SpeciesSaccharomyces cerevisiae
StrainBaker's yeast
DescriptionSiroheme is an iron-containing isobacteriochlorin, a modified tetrapyrrole similar in structure to both heme and chlorophyll. Siroheme is found as a prosthetic group of several enzymes, including sulfite and nitrite reductases, which catalyze the six-electron reductions of sulfite to sulfide and nitrite to ammonia, respectively. Siroheme biosynthesis starts by the same route as other tetrapyrroles, the synthesis of the intermediate uroporphyrinogen-III. [Biocyc PWY-5194]
Structure
Thumb
Synonyms
  • sirohaem
  • Siroheme
  • Octacarboxylate iron-tetrahydroporphyrin
CAS number52553-42-1
WeightAverage: 916.661
Monoisotopic: 916.210173513
InChI KeyDLKSSIHHLYNIKN-QIISWYHFSA-L
InChIInChI=1S/C42H46N4O16.Fe/c1-41(17-39(59)60)23(5-9-35(51)52)29-14-27-21(11-37(55)56)19(3-7-33(47)48)25(43-27)13-26-20(4-8-34(49)50)22(12-38(57)58)28(44-26)15-31-42(2,18-40(61)62)24(6-10-36(53)54)30(46-31)16-32(41)45-29;/h13-16,23-24H,3-12,17-18H2,1-2H3,(H10,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62);/q;+2/p-2/t23-,24-,41+,42+;/m1./s1
IUPAC Name3-[(4S,5S,9S,10S,11Z,16Z)-9,15,19-tris(2-carboxyethyl)-5,10,14,20-tetrakis(carboxymethyl)-5,10-dimethyl-21,23,24,25-tetraaza-22-ferrahexacyclo[9.9.3.1³,⁶.1¹³,¹⁶.0⁸,²³.0¹⁸,²¹]pentacosa-1(20),2,6(25),7,11,13(24),14,16,18-nonaen-4-yl]propanoic acid
Traditional IUPAC Name3-[(4S,5S,9S,10S,11Z,16Z)-9,15,19-tris(2-carboxyethyl)-5,10,14,20-tetrakis(carboxymethyl)-5,10-dimethyl-21,23,24,25-tetraaza-22-ferrahexacyclo[9.9.3.1³,⁶.1¹³,¹⁶.0⁸,²³.0¹⁸,²¹]pentacosa-1(20),2,6(25),7,11,13(24),14,16,18-nonaen-4-yl]propanoic acid
Chemical FormulaC42H44FeN4O16
SMILESC[C@]1(CC(O)=O)[C@H](CCC(O)=O)\C2=C\C3=C(CC(O)=O)C(CCC(O)=O)=C4\C=C5/N=C(/C=C6\N([Fe]N34)\C(=C/C1=N2)[C@@H](CCC(O)=O)[C@]6(C)CC(O)=O)C(CC(O)=O)=C5CCC(O)=O
Chemical Taxonomy
Description belongs to the class of organic compounds known as metallotetrapyrroles. These are polycyclic compounds containing a tetrapyrrole skeleton combined with a metal atom.
KingdomOrganic compounds
Super ClassOrganoheterocyclic compounds
ClassTetrapyrroles and derivatives
Sub ClassMetallotetrapyrroles
Direct ParentMetallotetrapyrroles
Alternative Parents
Substituents
  • Metallotetrapyrrole skeleton
  • Substituted pyrrole
  • Pyrrole
  • Heteroaromatic compound
  • Azacycle
  • Organic transition metal salt
  • Carboxylic acid
  • Carboxylic acid derivative
  • Hydrocarbon derivative
  • Carbonyl group
  • Organic salt
  • Organic zwitterion
  • Organic oxygen compound
  • Organooxygen compound
  • Organonitrogen compound
  • Organic nitrogen compound
  • Organic oxide
  • Organopnictogen compound
  • Aromatic heteropolycyclic compound
Molecular FrameworkAromatic heteropolycyclic compounds
External Descriptors
Physical Properties
StateNot Available
Charge0
Melting pointNot Available
Experimental Properties
PropertyValueReference
Water SolubilityNot AvailablePhysProp
LogPNot AvailablePhysProp
Predicted Properties
PropertyValueSource
Water Solubility0.13 g/LALOGPS
logP1.07ALOGPS
logS-3.8ALOGPS
pKa (Strongest Acidic)2.79ChemAxon
Physiological Charge-8ChemAxon
Number of Rings6ChemAxon
Bioavailability0ChemAxon
Rule of FiveYesChemAxon
Ghose FilterYesChemAxon
Veber's RuleYesChemAxon
MDDR-like RuleYesChemAxon
Biological Properties
Cellular Locations
  • cytoplasm
Organoleptic PropertiesNot Available
SMPDB Pathways
Sulfur metabolismPW002483 ThumbThumb?image type=greyscaleThumb?image type=simple
KEGG Pathways
Porphyrin and chlorophyll metabolismec00860 Map00860
Sulfur metabolismec00920 Map00920
SMPDB ReactionsNot Available
KEGG Reactions
Sirohydrochlorin + Iron(2+)hydron + Siroheme
Concentrations
Intracellular ConcentrationsNot Available
Extracellular ConcentrationsNot Available
Spectra
Spectra
Spectrum TypeDescriptionSplash KeyView
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, Positivesplash10-05i1-0000000090-f46f6449060cf2ca1980JSpectraViewer
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, Positivesplash10-00b9-0000000090-84962b34725f7a689488JSpectraViewer
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, Positivesplash10-01t9-0000000090-00a96804df0e7027208cJSpectraViewer
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, Negativesplash10-00xr-0000000092-0b4a42172e52e76b6f63JSpectraViewer
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, Negativesplash10-0ufr-0000000090-e9c0f647cacbe1d93a40JSpectraViewer
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, Negativesplash10-004i-0000000090-191e040b23bfd9ce6a65JSpectraViewer
MSMass Spectrum (Electron Ionization)Not AvailableJSpectraViewer
1D NMR13C NMR SpectrumNot AvailableJSpectraViewer
1D NMR1H NMR SpectrumNot AvailableJSpectraViewer
1D NMR13C NMR SpectrumNot AvailableJSpectraViewer
1D NMR1H NMR SpectrumNot AvailableJSpectraViewer
1D NMR13C NMR SpectrumNot AvailableJSpectraViewer
1D NMR1H NMR SpectrumNot AvailableJSpectraViewer
1D NMR13C NMR SpectrumNot AvailableJSpectraViewer
1D NMR1H NMR SpectrumNot AvailableJSpectraViewer
1D NMR13C NMR SpectrumNot AvailableJSpectraViewer
1D NMR1H NMR SpectrumNot AvailableJSpectraViewer
1D NMR13C NMR SpectrumNot AvailableJSpectraViewer
1D NMR1H NMR SpectrumNot AvailableJSpectraViewer
1D NMR13C NMR SpectrumNot AvailableJSpectraViewer
1D NMR1H NMR SpectrumNot AvailableJSpectraViewer
1D NMR13C NMR SpectrumNot AvailableJSpectraViewer
1D NMR1H NMR SpectrumNot AvailableJSpectraViewer
1D NMR13C NMR SpectrumNot AvailableJSpectraViewer
1D NMR1H NMR SpectrumNot AvailableJSpectraViewer
1D NMR13C NMR SpectrumNot AvailableJSpectraViewer
1D NMR1H NMR SpectrumNot AvailableJSpectraViewer
References
References:
  • UniProt Consortium (2011). "Ongoing and future developments at the Universal Protein Resource." Nucleic Acids Res 39:D214-D219.21051339
  • Scheer, M., Grote, A., Chang, A., Schomburg, I., Munaretto, C., Rother, M., Sohngen, C., Stelzer, M., Thiele, J., Schomburg, D. (2011). "BRENDA, the enzyme information system in 2011." Nucleic Acids Res 39:D670-D676.21062828
  • Herrgard, M. J., Swainston, N., Dobson, P., Dunn, W. B., Arga, K. Y., Arvas, M., Bluthgen, N., Borger, S., Costenoble, R., Heinemann, M., Hucka, M., Le Novere, N., Li, P., Liebermeister, W., Mo, M. L., Oliveira, A. P., Petranovic, D., Pettifer, S., Simeonidis, E., Smallbone, K., Spasic, I., Weichart, D., Brent, R., Broomhead, D. S., Westerhoff, H. V., Kirdar, B., Penttila, M., Klipp, E., Palsson, B. O., Sauer, U., Oliver, S. G., Mendes, P., Nielsen, J., Kell, D. B. (2008). "A consensus yeast metabolic network reconstruction obtained from a community approach to systems biology." Nat Biotechnol 26:1155-1160.18846089
  • Schubert, H. L., Raux, E., Matthews, M. A., Phillips, J. D., Wilson, K. S., Hill, C. P., Warren, M. J. (2002). "Structural diversity in metal ion chelation and the structure of uroporphyrinogen III synthase." Biochem Soc Trans 30:595-600.12196144
  • Schubert, H. L., Raux, E., Brindley, A. A., Leech, H. K., Wilson, K. S., Hill, C. P., Warren, M. J. (2002). "The structure of Saccharomyces cerevisiae Met8p, a bifunctional dehydrogenase and ferrochelatase." EMBO J 21:2068-2075.11980703
Synthesis Reference:Not Available
External Links:
ResourceLink
CHEBI ID28599
HMDB IDNot Available
Pubchem Compound ID11968291
Kegg IDC00748
ChemSpider ID24826253
FOODB IDNot Available
WikipediaSiroheme
BioCyc IDNot Available

Enzymes

General function:
Involved in binding
Specific function:
Catalyzes the conversion of precorrin-2 into siroheme. This reaction consist of the NAD-dependent oxidation of precorrin- 2 into sirohydrochlorin and its subsequent ferrochelation into siroheme
Gene Name:
MET8
Uniprot ID:
P15807
Molecular weight:
31917.40039
Reactions
Precorrin-2 + NAD(+) → sirohydrochlorin + NADH.
Siroheme + 2 H(+) → sirohydrochlorin + Fe(2+).