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3EH3

Structure of the reduced form of cytochrome ba3 oxidase from Thermus thermophilus

Functional Information from GO Data
ChainGOidnamespacecontents
A0004129molecular_functioncytochrome-c oxidase activity
A0005886cellular_componentplasma membrane
A0006119biological_processoxidative phosphorylation
A0006811biological_processmonoatomic ion transport
A0009060biological_processaerobic respiration
A0016020cellular_componentmembrane
A0020037molecular_functionheme binding
A0046872molecular_functionmetal ion binding
A1902600biological_processproton transmembrane transport
B0004129molecular_functioncytochrome-c oxidase activity
B0005507molecular_functioncopper ion binding
B0005886cellular_componentplasma membrane
B0016020cellular_componentmembrane
B0046872molecular_functionmetal ion binding
B1902600biological_processproton transmembrane transport
C0004129molecular_functioncytochrome-c oxidase activity
C0005886cellular_componentplasma membrane
C0006811biological_processmonoatomic ion transport
C1902600biological_processproton transmembrane transport
Functional Information from PDB Data
site_idAC1
Number of Residues3
DetailsBINDING SITE FOR RESIDUE CU1 A 803
ChainResidue
AHIS233
AHIS282
AHIS283

site_idAC2
Number of Residues20
DetailsBINDING SITE FOR RESIDUE HEM A 800
ChainResidue
AASN76
AALA77
ALEU132
ATYR133
APHE385
AHIS386
AVAL389
AALA390
ATHR394
AMET435
AARG449
AARG450
AALA451
ALEU477
AGLY39
AGLN42
ATYR46
ATYR65
ALEU69
AHIS72

site_idAC3
Number of Residues29
DetailsBINDING SITE FOR RESIDUE HAS A 801
ChainResidue
ATYR133
ATRP229
AVAL236
ATYR237
ATRP239
ALEU240
AHIS282
ASER309
ALEU310
AALA313
AVAL316
ATRP335
AILE336
AVAL350
ALEU353
ALEU354
APHE356
AGLY360
AASN366
AALA367
AASP372
AHIS376
AVAL381
AHIS384
APHE385
AGLN388
AVAL389
AARG449
CLEU15

site_idAC4
Number of Residues6
DetailsBINDING SITE FOR RESIDUE CUA B 802
ChainResidue
BHIS114
BCYS149
BGLN151
BCYS153
BHIS157
BMET160

Functional Information from PROSITE/UniProt
site_idPS00077
Number of Residues55
DetailsCOX1_CUB Heme-copper oxidase catalytic subunit, copper B binding region signature. WWTGHPiVyfwllpayaiiytilpkqaggrlvsdpmarlafllflllstpvgf..HH
ChainResidueDetails
ATRP229-HIS283

site_idPS00078
Number of Residues49
DetailsCOX2 CO II and nitrous oxide reductase dinuclear copper centers signature. ViHgfhvegtninvevlpgevstvrytfkrpgeyrii......CnqyCglgHqnM
ChainResidueDetails
BVAL112-MET160

Functional Information from SwissProt/UniProt
site_idSWS_FT_FI1
Number of Residues260
DetailsTransmembrane: {"description":"Helical","evidences":[{"evidenceCode":"ECO:0000255"}]}
ChainResidueDetails

site_idSWS_FT_FI2
Number of Residues3
DetailsBinding site: {"description":"axial binding residue","evidences":[{"evidenceCode":"ECO:0000305"}]}
ChainResidueDetails

site_idSWS_FT_FI3
Number of Residues6
DetailsBinding site: {}
ChainResidueDetails

site_idSWS_FT_FI4
Number of Residues2
DetailsBinding site: {"evidences":[{"evidenceCode":"ECO:0000305"}]}
ChainResidueDetails

site_idSWS_FT_FI5
Number of Residues2
DetailsCross-link: {"description":"1'-histidyl-3'-tyrosine (His-Tyr)"}
ChainResidueDetails

site_idSWS_FT_FI6
Number of Residues64
DetailsTransmembrane: {"description":"Helical"}
ChainResidueDetails

site_idSWS_FT_FI7
Number of Residues129
DetailsTopological domain: {"description":"Periplasmic"}
ChainResidueDetails

Catalytic Information from CSA
site_idCSA1
Number of Residues7
DetailsAnnotated By Reference To The Literature 1ehk
ChainResidueDetails
AHIS384
AARG449
ATYR237
AHIS386
APHE385
AHIS233
AARG450

site_idCSA2
Number of Residues2
DetailsAnnotated By Reference To The Literature 1ehk
ChainResidueDetails
BPHE86
BPHE88

site_idMCSA1
Number of Residues2
DetailsM-CSA 735
ChainResidueDetails
BPHE86electron shuttle
BPHE88electron shuttle
AHIS384electron shuttle
APHE385electron shuttle
AHIS386electron shuttle
AARG449electron shuttle
AARG450electron shuttle

243083

PDB entries from 2025-10-15

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