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Protein

Cytochrome c oxidase subunit 1

Gene

COI

Organism
Crithidia oncopelti
Status
Reviewed-Annotation score: Annotation score: 4 out of 5-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.

Pathwayi

Sites

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Metal bindingi64 – 641Iron (heme A axial ligand)Curated
Metal bindingi243 – 2431Copper BCurated
Metal bindingi247 – 2471Copper BCurated
Metal bindingi292 – 2921Copper BCurated
Metal bindingi293 – 2931Copper BCurated

GO - Molecular functioni

  1. cytochrome-c oxidase activity Source: UniProtKB-EC
  2. heme binding Source: InterPro
  3. iron ion binding Source: InterPro

GO - Biological processi

  1. aerobic respiration Source: InterPro
  2. oxidative phosphorylation Source: UniProtKB-UniPathway
Complete GO annotation...

Keywords - Molecular functioni

Oxidoreductase

Keywords - Biological processi

Electron transport, Respiratory chain, Transport

Keywords - Ligandi

Copper, 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 c oxidase polypeptide I
Gene namesi
Name:COI
Encoded oniMitochondrion
OrganismiCrithidia oncopelti
Taxonomic identifieri5657 [NCBI]
Taxonomic lineageiEukaryotaEuglenozoaKinetoplastidaTrypanosomatidaeStrigomonadinaeStrigomonas

Subcellular locationi

Topology

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Transmembranei18 – 3821HelicalSequence AnalysisAdd
BLAST
Transmembranei42 – 6221HelicalSequence AnalysisAdd
BLAST
Transmembranei66 – 8621HelicalSequence AnalysisAdd
BLAST
Transmembranei100 – 12021HelicalSequence AnalysisAdd
BLAST
Transmembranei148 – 16821HelicalSequence AnalysisAdd
BLAST
Transmembranei186 – 20621HelicalSequence AnalysisAdd
BLAST
Transmembranei237 – 25721HelicalSequence AnalysisAdd
BLAST
Transmembranei279 – 29921HelicalSequence AnalysisAdd
BLAST
Transmembranei305 – 32521HelicalSequence AnalysisAdd
BLAST

GO - Cellular componenti

  1. integral component of membrane Source: UniProtKB-KW
  2. mitochondrial inner membrane Source: UniProtKB-SubCell
  3. respiratory chain Source: UniProtKB-KW
Complete GO annotation...

Keywords - Cellular componenti

Membrane, Mitochondrion, Mitochondrion inner membrane

PTM / Processingi

Molecule processing

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Chaini1 – ›340›340Cytochrome c oxidase subunit 1PRO_0000183317Add
BLAST

Amino acid modifications

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Cross-linki243 ↔ 2471'-histidyl-3'-tyrosine (His-Tyr)By similarity

Structurei

3D structure databases

ProteinModelPortaliP98003.
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Sequence similaritiesi

Keywords - Domaini

Transmembrane, Transmembrane helix

Family and domain databases

Gene3Di1.20.210.10. 1 hit.
InterProiIPR000883. COX1.
IPR023615. Cyt_c_Oxase_su1_BS.
IPR023616. Cyt_c_Oxase_su1_dom.
[Graphical view]
PANTHERiPTHR10422. PTHR10422. 1 hit.
PfamiPF00115. COX1. 1 hit.
[Graphical view]
PRINTSiPR01165. CYCOXIDASEI.
SUPFAMiSSF81442. SSF81442. 1 hit.
PROSITEiPS50855. COX1. 1 hit.
PS00077. COX1_CUB. 1 hit.
[Graphical view]

Sequencei

Sequence statusi: Fragment.

P98003-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MFWISLVCLS VSHKMIGMCY LLVAILCGFL GYIYSLFIRL ELSIIGCGVL
60 70 80 90 100
FGDYQYYNVL VTTHGLVMVF AFIMPVMMGG LVNYFVPVLS GFPDMVFPRL
110 120 130 140 150
NNMSFWMFMG GFGALVSGLL TEEGMGIGWT MYPTLICVDF HSSLACDFTV
160 170 180 190 200
FAVHLLGVSS ILNSINLLGT LFCCRRKFFS FLNWTLFIWG SLITALLLII
210 220 230 240 250
TLPVLAGGVT LVLCDRNFNT SFYDVVGGGD LLLFQHLFWF FGHPEVYIII
260 270 280 290 300
IPVFGLISTM VEVLGFRCVF SSVAMIYSMI LIAILGFFVW AHHMFVVGMD
310 320 330 340
VDTRAYFGSV TVLIGLPTCI KLFNWTYSFL YTDFIIAFEA
Length:340
Mass (Da):38,174
Last modified:February 1, 1996 - v1
Checksum:i65D78B06AFD07B54
GO

Experimental Info

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Non-terminal residuei340 – 3401

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
X56015 Genomic DNA. Translation: CAA39490.1.
PIRiS34958.

Cross-referencesi

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
X56015 Genomic DNA. Translation: CAA39490.1.
PIRiS34958.

3D structure databases

ProteinModelPortaliP98003.
ModBaseiSearch...
MobiDBiSearch...

Protocols and materials databases

Structural Biology KnowledgebaseSearch...

Enzyme and pathway databases

UniPathwayiUPA00705.

Family and domain databases

Gene3Di1.20.210.10. 1 hit.
InterProiIPR000883. COX1.
IPR023615. Cyt_c_Oxase_su1_BS.
IPR023616. Cyt_c_Oxase_su1_dom.
[Graphical view]
PANTHERiPTHR10422. PTHR10422. 1 hit.
PfamiPF00115. COX1. 1 hit.
[Graphical view]
PRINTSiPR01165. CYCOXIDASEI.
SUPFAMiSSF81442. SSF81442. 1 hit.
PROSITEiPS50855. COX1. 1 hit.
PS00077. COX1_CUB. 1 hit.
[Graphical view]
ProtoNetiSearch...

Publicationsi

  1. Maslov D.A., Horvath A., Gwang K. II, Kolesnikov A.A.
    Submitted (OCT-1990) to the EMBL/GenBank/DDBJ databases
    Cited for: NUCLEOTIDE SEQUENCE [GENOMIC DNA].
    Strain: S-068.

Entry informationi

Entry nameiCOX1_CRION
AccessioniPrimary (citable) accession number: P98003
Entry historyi
Integrated into UniProtKB/Swiss-Prot: February 1, 1996
Last sequence update: February 1, 1996
Last modified: February 4, 2015
This is version 76 of the entry and version 1 of the sequence. [Complete history]
Entry statusiReviewed (UniProtKB/Swiss-Prot)

Miscellaneousi

Documents

  1. PATHWAY comments
    Index of metabolic and biosynthesis pathways
  2. SIMILARITY comments
    Index of protein domains and families

External Data

Dasty 3

Similar proteinsi

Links to similar proteins from the UniProt Reference Clusters (UniRef) at 100%, 90% and 50% sequence identity:
100%UniRef100 combines identical sequences and sub-fragments with 11 or more residues from any organism into Uniref entry.
90%UniRef90 is built by clustering UniRef100 sequences that have at least 90% sequence identity to, and 80% overlap with, the longest sequence (a.k.a seed sequence).
50%UniRef50 is built by clustering UniRef90 seed sequences that have at least 50% sequence identity to, and 80% overlap with, the longest sequence in the cluster.