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1XK3

NADPH- and Ascorbate-Supported Heme Oxygenase Reactions are Distinct. Regiospecificity of Heme Cleavage by the R183E Mutant

Functional Information from GO Data
ChainGOidnamespacecontents
A0004392molecular_functionheme oxygenase (decyclizing) activity
A0006788biological_processheme oxidation
B0004392molecular_functionheme oxygenase (decyclizing) activity
B0006788biological_processheme oxidation
Functional Information from PDB Data
site_idAC1
Number of Residues16
DetailsBINDING SITE FOR RESIDUE HEM A 300
ChainResidue
ALYS18
ALEU147
ALYS179
APHE207
AASN210
APHE214
ANO400
AHOH454
AHIS25
AMET34
AGLN38
ATYR134
ATHR135
AARG136
AGLY139
ASER142

site_idAC2
Number of Residues15
DetailsBINDING SITE FOR RESIDUE HEM B 300
ChainResidue
BLYS18
BHIS25
BGLU29
BMET34
BGLN38
BTYR134
BTHR135
BARG136
BGLY139
BLEU147
BGLU183
BPHE207
BASN210
BPHE214
BHOH371

site_idAC3
Number of Residues3
DetailsBINDING SITE FOR RESIDUE NO A 400
ChainResidue
AGLY139
AHEM300
AHOH418

Functional Information from PROSITE/UniProt
site_idPS00593
Number of Residues11
DetailsHEME_OXYGENASE Heme oxygenase signature. LVAHAYTRYLG
ChainResidueDetails
ALEU129-GLY139

Functional Information from SwissProt/UniProt
site_idSWS_FT_FI1
Number of Residues6
DetailsBinding site: {"evidences":[{"source":"PubMed","id":"12842469","evidenceCode":"ECO:0000269"},{"source":"PDB","id":"1OZW","evidenceCode":"ECO:0007744"}]}
ChainResidueDetails

site_idSWS_FT_FI2
Number of Residues2
DetailsBinding site: {"description":"axial binding residue","evidences":[{"source":"PubMed","id":"12842469","evidenceCode":"ECO:0000269"},{"source":"PDB","id":"1OZW","evidenceCode":"ECO:0007744"}]}
ChainResidueDetails

site_idSWS_FT_FI3
Number of Residues2
DetailsSite: {"description":"Important for catalytic activity","evidences":[{"source":"PubMed","id":"11121422","evidenceCode":"ECO:0000269"}]}
ChainResidueDetails

Catalytic Information from CSA
site_idCSA1
Number of Residues7
DetailsAnnotated By Reference To The Literature 1dve
ChainResidueDetails
AARG136
ATYR58
ATHR135
AASP140
AGLY143
AHIS25
AGLY139

site_idCSA2
Number of Residues7
DetailsAnnotated By Reference To The Literature 1dve
ChainResidueDetails
BARG136
BTYR58
BTHR135
BASP140
BGLY143
BHIS25
BGLY139

site_idCSA3
Number of Residues2
DetailsAnnotated By Reference To The Literature 1dve
ChainResidueDetails
AASP140
AGLY144

site_idCSA4
Number of Residues2
DetailsAnnotated By Reference To The Literature 1dve
ChainResidueDetails
BASP140
BGLY144

243083

PDB entries from 2025-10-15

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