Record Information
Version1.0
StatusDetected and Quantified
Creation Date2021-11-17 23:38:18 UTC
Update Date2024-04-30 19:40:56 UTC
Metabolite IDMMDBc0029705
Metabolite Identification
Common NameHeme
DescriptionHeme B or haem B (also known as protoheme IX) is the most abundant heme in nature. E. coli is known to produce 4 different hemes: protoheme IX (heme B), heme C, heme D, and siroheme. A heme or haem is a prosthetic group that consists of an iron atom contained in the center of a large heterocyclic organic ring called a porphyrin. Not all porphyrins contain iron, but a substantial fraction of porphyrin-containing metalloproteins have heme as their prosthetic subunit; these are known as hemoproteins. Generally, heme B is attached to the surrounding protein matrix (known as the apoprotein) through a single coordination bond between the heme iron and an amino-acid side-chain. When oxygen is bound the iron becomes hexacoordinated. Since the iron in heme B containing proteins is bound to the four nitrogens of the porphyrin (forming a plane) and a single electron donating atom of the protein, the iron is often in a pentacoordinate state.
Structure
Synonyms
ValueSource
(protoporphyrinato)IronHMDB
FerrohemeHMDB
Ferroheme bHMDB
FerroprotohemeHMDB
FerroprotoporphyrinHMDB
Ferroprotoporphyrin IXHMDB
Ferrous protohemeHMDB
Ferrous protoheme IXHMDB
HaemHMDB
HemHMDB
Iron protoporphyrinHMDB
Iron protoporphyrin IXHMDB
Iron(II) protoporphyrin IXHMDB
ProtoferrohemeHMDB
ProtohaemHMDB
ProtohemeHMDB
Protoheme IXHMDB
Reduced hematinHMDB
Molecular FormulaC34H32FeN4O4
Average Mass616.487
Monoisotopic Mass616.177297665
IUPAC Name(1R)-15,19-bis(2-carboxyethyl)-5,10-diethenyl-4,9,14,20-tetramethyl-2λ⁵,22,23λ⁵,25-tetraaza-1-ferraoctacyclo[11.9.1.1¹,⁸.1³,²¹.0²,⁶.0¹⁶,²³.0¹⁸,²².0¹¹,²⁵]pentacosa-2,4,6,8,10,12,14,16(23),17,19,21(24)-undecaene-2,23-bis(ylium)
Traditional NameHeme
CAS Registry Number14875-96-8
SMILES
CC1=C(CCC(O)=O)C2=CC3=[N+]4C(=CC5=C(C=C)C(C)=C6C=C7C(C=C)=C(C)C8=[N+]7[Fe@]4(N2C1=C8)N56)C(C)=C3CCC(O)=O
InChI Identifier
InChI=1S/C34H34N4O4.Fe/c1-7-21-17(3)25-13-26-19(5)23(9-11-33(39)40)31(37-26)16-32-24(10-12-34(41)42)20(6)28(38-32)15-30-22(8-2)18(4)27(36-30)14-29(21)35-25;/h7-8,13-16H,1-2,9-12H2,3-6H3,(H4,35,36,37,38,39,40,41,42);/q;+4/p-2/b25-13-,26-13-,27-14-,28-15-,29-14-,30-15-,31-16-,32-16-;
InChI KeyYHLKGEDAGPGZPN-RGGAHWMASA-L