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3KS0

Crystal structure of the heme domain of flavocytochrome b2 in complex with Fab B2B4

Functional Information from GO Data
ChainGOidnamespacecontents
A0020037molecular_functionheme binding
B0020037molecular_functionheme binding
Functional Information from PDB Data
site_idAC1
Number of Residues17
DetailsBINDING SITE FOR RESIDUE HEM A 101
ChainResidue
AILE29
AILE71
ATYR74
AILE75
AHOH276
KSER52
KTYR53
LLYS152
LGLY155
APHE39
AHIS43
APRO44
AVAL49
AVAL58
APHE62
ALEU65
AHIS66

site_idAC2
Number of Residues20
DetailsBINDING SITE FOR RESIDUE HEM B 101
ChainResidue
BILE29
BPHE39
BHIS43
BPRO44
BGLY45
BVAL49
BVAL58
BPHE62
BLEU65
BHIS66
BTYR74
BILE75
BHOH325
HTYR33
HSER52
HTYR53
HGLY54
HSER56
JLYS152
JGLY155

Functional Information from PROSITE/UniProt
site_idPS00191
Number of Residues8
DetailsCYTOCHROME_B5_1 Cytochrome b5 family, heme-binding domain signature. FLPNHPGG
ChainResidueDetails
APHE39-GLY46

site_idPS00290
Number of Residues7
DetailsIG_MHC Immunoglobulins and major histocompatibility complex proteins signature. YSCQVTH
ChainResidueDetails
LTYR194-HIS200

Functional Information from SwissProt/UniProt
site_idSWS_FT_FI1
Number of Residues154
DetailsDomain: {"description":"Cytochrome b5 heme-binding","evidences":[{"source":"PROSITE-ProRule","id":"PRU00279","evidenceCode":"ECO:0000255"}]}
ChainResidueDetails

site_idSWS_FT_FI2
Number of Residues4
DetailsBinding site: {"description":"axial binding residue","evidences":[{"source":"PubMed","id":"11914072","evidenceCode":"ECO:0000269"},{"source":"PubMed","id":"2329585","evidenceCode":"ECO:0000269"},{"source":"PDB","id":"1FCB","evidenceCode":"ECO:0007744"},{"source":"PDB","id":"1KBI","evidenceCode":"ECO:0007744"}]}
ChainResidueDetails

site_idSWS_FT_FI3
Number of Residues2
DetailsBinding site: {"evidences":[{"source":"PubMed","id":"11914072","evidenceCode":"ECO:0000269"},{"source":"PubMed","id":"2329585","evidenceCode":"ECO:0000269"},{"source":"PDB","id":"1FCB","evidenceCode":"ECO:0007744"},{"source":"PDB","id":"1KBI","evidenceCode":"ECO:0007744"}]}
ChainResidueDetails

Catalytic Information from CSA
site_idMCSA1
Number of Residues
DetailsM-CSA 102
ChainResidueDetails

site_idMCSA2
Number of Residues
DetailsM-CSA 102
ChainResidueDetails

246031

PDB entries from 2025-12-10

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