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Protein

Cytochrome c oxidase subunit 1

Gene

ctaD

Organism
Thermosynechococcus vulcanus (Synechococcus vulcanus)
Status
Reviewed-Annotation score: -Protein inferred from homologyi

Functioni

Cytochrome c oxidase is the component of the respiratory chain that catalyzes the reduction of oxygen to water. Subunits 1-3 form the functional core of the enzyme complex. CO I is the catalytic subunit of the enzyme. Electrons originating in cytochrome c are transferred via the copper A center of subunit 2 and heme A of subunit 1 to the bimetallic center formed by heme A3 and copper B.

Catalytic activityi

4 ferrocytochrome c + O2 + 4 H+ = 4 ferricytochrome c + 2 H2O.

Cofactori

Protein has several cofactor binding sites:
  • Cu2+Note: Binds 1 copper B ion per subunit.
  • hemeNote: Binds 2 heme groups per subunit.

Pathwayi: oxidative phosphorylation

This protein is involved in the pathway oxidative phosphorylation, which is part of Energy metabolism.
View all proteins of this organism that are known to be involved in the pathway oxidative phosphorylation and in Energy metabolism.

Sites

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Metal bindingi82Iron (heme A axial ligand)Curated1
Metal bindingi258Copper BCurated1
Metal bindingi262Copper BCurated1
Metal bindingi307Copper BCurated1
Metal bindingi308Copper BCurated1
Metal bindingi393Iron (heme A3 axial ligand)Curated1
Metal bindingi395Iron (heme A axial ligand)Curated1

GO - Molecular functioni

GO - Biological processi

Keywordsi

Molecular functionOxidoreductase
Biological processElectron transport, Respiratory chain, Transport
LigandCopper, Heme, Iron, Metal-binding

Enzyme and pathway databases

UniPathwayiUPA00705

Names & Taxonomyi

Protein namesi
Recommended name:
Cytochrome c oxidase subunit 1 (EC:1.9.3.1)
Alternative name(s):
Cytochrome aa3 subunit 1
Cytochrome c oxidase polypeptide I
Oxidase aa(3) subunit 1
Gene namesi
Name:ctaD
OrganismiThermosynechococcus vulcanus (Synechococcus vulcanus)
Taxonomic identifieri32053 [NCBI]
Taxonomic lineageiBacteriaCyanobacteriaSynechococcalesSynechococcaceaeThermosynechococcus

Subcellular locationi

Topology

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Transmembranei35 – 55HelicalSequence analysisAdd BLAST21
Transmembranei85 – 105HelicalSequence analysisAdd BLAST21
Transmembranei120 – 140HelicalSequence analysisAdd BLAST21
Transmembranei164 – 184HelicalSequence analysisAdd BLAST21
Transmembranei211 – 231HelicalSequence analysisAdd BLAST21
Transmembranei252 – 272HelicalSequence analysisAdd BLAST21
Transmembranei284 – 304HelicalSequence analysisAdd BLAST21
Transmembranei321 – 341HelicalSequence analysisAdd BLAST21
Transmembranei355 – 375HelicalSequence analysisAdd BLAST21
Transmembranei390 – 410HelicalSequence analysisAdd BLAST21
Transmembranei426 – 446HelicalSequence analysisAdd BLAST21
Transmembranei470 – 490HelicalSequence analysisAdd BLAST21

GO - Cellular componenti

Keywords - Cellular componenti

Cell membrane, Membrane

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
ChainiPRO_00001834601 – 552Cytochrome c oxidase subunit 1Add BLAST552

Amino acid modifications

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Cross-linki258 ↔ 2621'-histidyl-3'-tyrosine (His-Tyr)By similarity

Structurei

3D structure databases

ProteinModelPortaliP50676
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Sequence similaritiesi

Keywords - Domaini

Transmembrane, Transmembrane helix

Family and domain databases

Gene3Di1.20.210.10, 1 hit
InterProiView protein in InterPro
IPR023616 Cyt_c_oxase-like_su1_dom
IPR036927 Cyt_c_oxase-like_su1_sf
IPR000883 Cyt_C_Oxase_1
IPR023615 Cyt_c_Oxase_su1_BS
IPR014241 Cyt_c_oxidase_su1_bac
PANTHERiPTHR10422 PTHR10422, 1 hit
PfamiView protein in Pfam
PF00115 COX1, 1 hit
PRINTSiPR01165 CYCOXIDASEI
SUPFAMiSSF81442 SSF81442, 1 hit
TIGRFAMsiTIGR02891 CtaD_CoxA, 1 hit
PROSITEiView protein in PROSITE
PS50855 COX1, 1 hit
PS00077 COX1_CUB, 1 hit

Sequencei

Sequence statusi: Complete.

P50676-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MAQAQLPLDT PLSLPEHPKA WKWYDYFTFN VDHKVIGIQY LVTAFIFYLI
60 70 80 90 100
GGLMAVAMRT ELATADSDFL DPNLYNAFLT NHGTIMIFLW VVPAAIGGFG
110 120 130 140 150
NYLVPLMIGA RDMAFPRLNA LAFWLNPPAG ALLLASFLFG GAQAGWTSYP
160 170 180 190 200
PLSTITATTA QSMWILAIIL VGTSSILGSV NFIVTIWKMK VPSMRWNQLP
210 220 230 240 250
LFCWAMLATS LLALVSTPVL AAGLILLLFD INFGTSFYKP DAGGNVVIYQ
260 270 280 290 300
HLFWFYSHPA VYLMILPIFG IMSEVIPVHA RKPIFGYQAI AYSSLAICCV
310 320 330 340 350
GLFVWVHHMF TSGTPPWMRM FFTISTLIVA VPTGVKIFSW VATLWGGKIR
360 370 380 390 400
LNSAMLFAIG LMSMFVLGGL SGVTLGTAPV DIHVHDTYYV VAHFHYVLFG
410 420 430 440 450
GSVFGLYAGI YHWFPKMTGR LLDERLGILH FVLTLIGTNW TFLPMHELGL
460 470 480 490 500
KGMPRRVAMY DPQFEPVNLI CTIGAFVLAF SIIPFLINII WSWNKGKIAG
510 520 530 540 550
DNPWGGLTLE WTTSSPPLIE NWEVLPVVTK GPYDYGIERR QESTDEDHDE

QE
Length:552
Mass (Da):61,521
Last modified:October 1, 1996 - v1
Checksum:iEC6FDF34497CD061
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
D16254 Genomic DNA Translation: BAA41041.1

Similar proteinsi

Entry informationi

Entry nameiCOX1_THEVL
AccessioniPrimary (citable) accession number: P50676
Entry historyiIntegrated into UniProtKB/Swiss-Prot: October 1, 1996
Last sequence update: October 1, 1996
Last modified: May 23, 2018
This is version 97 of the entry and version 1 of the sequence. See complete history.
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programProkaryotic Protein Annotation Program

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