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Information on EC 1.14.14.18 - heme oxygenase (biliverdin-producing)

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IUBMB Comments
This mammalian enzyme participates in the degradation of heme. 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 enzyme requires NAD(P)H and EC 1.6.2.4, NADPH---hemoprotein reductase. cf. EC 1.14.15.20, heme oxygenase (biliverdin-producing, ferredoxin).
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UNIPROT: O69002
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Word Map
The enzyme appears in viruses and cellular organisms
Synonyms
heme oxygenase-1, heme oxygenase, hmox1, heme oxygenase 1, haem oxygenase, hsp32, heme oxygenase-2, hmox2, heme oxygenase 2, hmox1a, more
SYNONYM
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
biliverdin-producing heme oxygenase
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haem oxygenase
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ORP33 proteins
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oxygenase, heme (decyclizing)
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proteins, specific or class, ORP33 (oxygen-regulated protein 33,000-mol.-wt.)
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REACTION TYPE
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
redox reaction
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oxidation
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reduction
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SYSTEMATIC NAME
IUBMB Comments
protoheme,NADPH-hemoprotein reductase:oxygen oxidoreductase (alpha-methene-oxidizing, hydroxylating)
This mammalian enzyme participates in the degradation of heme. 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 [4]. The third oxygen molecule provides the oxygen atom that converts the alpha-carbon to CO. The enzyme requires NAD(P)H and EC 1.6.2.4, NADPH---hemoprotein reductase. cf. EC 1.14.15.20, heme oxygenase (biliverdin-producing, ferredoxin).
CAS REGISTRY NUMBER
COMMENTARY hide
9059-22-7
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SUBSTRATE
PRODUCT                       
REACTION DIAGRAM
ORGANISM
UNIPROT
COMMENTARY
(Substrate) hide
LITERATURE
(Substrate)
COMMENTARY
(Product) hide
LITERATURE
(Product)
Reversibility
r=reversible
ir=irreversible
?=not specified
protoheme + [reduced NADPH-hemoprotein reductase] + O2
biliverdin IXbeta + biliverdin IXdelta + Fe2+ + CO + [oxidized NADPH-hemoprotein reductase] + H2O
show the reaction diagram
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?
COFACTOR
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
IMAGE
heme
sprectrum shows a Soret band at 407 nm
INHIBITOR
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
IMAGE
(E)-2-(4-isopropylbenzylidene)hydrazinecarboximidamide
compound shows a binding affinity of 5.7 microM and an MIC50 of 52.3 microg/ml against Pseudomonas aeruginosa PAO1 and increased activity against clinical isolates of Pseudomonas aeruginosa
ORGANISM
COMMENTARY hide
LITERATURE
UNIPROT
SEQUENCE DB
SOURCE
GENERAL INFORMATION
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
evolution
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Pseudomonas strains exhibit four possible enzyme compositions: (I) BphO, (II) PigA, (III) BphO and PigA and (IV) two PigAs. In Pseudomonas aeruginosa PAO1, PigA is encoded in a cluster together with proteins involved in iron utilization while BphO is functionally and genetically coupled to the phytochrome BphP
physiological function
UNIPROT
ENTRY NAME
ORGANISM
NO. OF AA
NO. OF TRANSM. HELICES
MOLECULAR WEIGHT[Da]
SOURCE
SEQUENCE
LOCALIZATION PREDICTION?
O69002_PSEAI
198
0
21954
TrEMBL
other Location (Reliability: 2), other Location (Reliability: 1)
CRYSTALLIZATION (Commentary)
ORGANISM
UNIPROT
LITERATURE
molecular docking of inhibitor (E)-2-(4-isopropylbenzylidene)hydrazinecarboximidamide to HemO on the back site and the heme site
PROTEIN VARIANTS
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
H26A/K34A/K132A
mutant does not interact with holo-PhuS and shows no enzymatic activity
N19K/K34A/F117Y/K132A
change in regioselectivity, product is biliverdin IXalpha
TEMPERATURE STABILITY
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
54 - 56
melting temperature, wild-type and mutants H26A/K34A/K132A and N19K/K34A/F117Y/K132A
REF.
AUTHORS
TITLE
JOURNAL
VOL.
PAGES
YEAR
ORGANISM (UNIPROT)
PUBMED ID
SOURCE
Mourino, S.; Giardina, B.; Reyes-Caballero, H.; Wilks, A.
Metabolite-driven regulation of heme uptake by the biliverdin IXbeta/delta-selective heme oxygenase (HemO) of Pseudomonas aeruginosa
J. Biol. Chem.
291
20503-20515
2016
Pseudomonas aeruginosa (O69002), Pseudomonas aeruginosa
Manually annotated by BRENDA team
Heinzl, G.A.; Huang, W.; Yu, W.; Giardina, B.J.; Zhou, Y.; MacKerell, A.D.; Wilks, A.; Xue, F.
Iminoguanidines as allosteric inhibitors of the iron-regulated heme oxygenase (HemO) of Pseudomonas aeruginosa
J. Med. Chem.
59
6929-6942
2016
Pseudomonas aeruginosa (O69002), Pseudomonas aeruginosa
Manually annotated by BRENDA team