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NiceZyme View of ENZYME: EC 1.14.99.3

Official Name
Heme oxygenase.
Alternative Name(s)
Heme oxidase.
Heme oxygenase (decyclizing).
Reaction catalysed
Heme + 3 AH(2) + 3 O(2) <=> biliverdin + Fe(2+) + CO + 3 A + 3 H(2)O
Comment(s)
  • Requires NAD(P)H and EC 1.6.2.4.
  • The terminal oxygen atoms that are incorporated into the carbonyl groups of pyrrole rings A and B of biliverdin are derived from two separate oxygen molecules.
  • The third oxygen molecule provides the oxygen atom that converts the alpha-carbon to CO.
  • The central iron is kept in the reduced state by NAD(P)H.
Cross-references
Biochemical Pathways; map number(s)K5 ; L5
PROSITEPDOC00512
BRENDA1.14.99.3
PUMA21.14.99.3
PRIAM enzyme-specific profiles1.14.99.3
KEGG Ligand Database for Enzyme Nomenclature1.14.99.3
IUBMB Enzyme Nomenclature1.14.99.3
IntEnz1.14.99.3
MEDLINEFind literature relating to 1.14.99.3
MetaCyc1.14.99.3
UniProtKB/Swiss-Prot
Q5E9F2, HMOX1_BOVIN;  P14791, HMOX1_CHICK;  P09601, HMOX1_HUMAN;  
P14901, HMOX1_MOUSE;  P32394, HMOX1_PIG;  Q5R7E3, HMOX1_PONAB;  
P06762, HMOX1_RAT;  P30519, HMOX2_HUMAN;  Q2PG53, HMOX2_MACFA;  
O70252, HMOX2_MOUSE;  P43242, HMOX2_RABIT;  P23711, HMOX2_RAT;  
O70453, HMOX3_RAT;  O73688, HMOX_FUGRU;  P71119, HMUO_CORDI;  
P72849, HO1_SYNY3;  P74133, HO2_SYNY3;  O78497, HO_GUITH;  
P51271, HO_PORPU;  Q1XDL5, HO_PORYE;  O19998, HO_RHOVL;  
A0RJE3, ISDG_BACAH;  Q81L50, ISDG_BACAN;  Q72ZK2, ISDG_BACC1;  
Q812Q3, ISDG_BACCR;  Q633Q1, ISDG_BACCZ;  Q9K7R6, ISDG_BACHD;  
Q6HCY5, ISDG_BACHK;  Q5WCF2, ISDG_BACSK;  Q7AP29, ISDG_LISIN;  
Q723G7, ISDG_LISMF;  Q92EH3, ISDG_LISMO;  A0AFT8, ISDG_LISW6;  
A7WXE5, ISDG_STAA1;  Q2FHU5, ISDG_STAA3;  Q2FZE2, ISDG_STAA8;  
Q2YX89, ISDG_STAAB;  Q5HGU8, ISDG_STAAC;  Q99UW8, ISDG_STAAM;  
Q7A649, ISDG_STAAN;  Q6GHV0, ISDG_STAAR;  Q6GA79, ISDG_STAAS;  
A8Z1R5, ISDG_STAAT;  Q8NX62, ISDG_STAAW;  Q5HM56, ISDG_STAEQ;  
Q8CRK4, ISDG_STAES;  Q4L849, ISDG_STAHJ;  Q49ZB8, ISDG_STAS1;  
Q2FK96, ISDI_STAA3;  Q2G1J2, ISDI_STAA8;  Q5HJK5, ISDI_STAAC;  
Q99X56, ISDI_STAAM;  Q7A827, ISDI_STAAN;  Q6GKE0, ISDI_STAAR;  
Q6GCW1, ISDI_STAAS;  Q7A1Y8, ISDI_STAAW;  

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