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Protein

Cytochrome f

Gene

petA

Organism
Guillardia theta (Cryptomonas phi)
Status
Reviewed-Annotation score: Annotation score: 3 out of 5-Protein inferred from homologyi

Functioni

Component of the cytochrome b6-f complex, which mediates electron transfer between photosystem II (PSII) and photosystem I (PSI), cyclic electron flow around PSI, and state transitions.By similarity

Cofactori

hemeBy similarityNote: Binds 1 heme group covalently.By similarity

Sites

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Metal bindingi39 – 391Iron (heme axial ligand); via amino nitrogenBy similarity
Binding sitei59 – 591Heme (covalent)By similarity
Binding sitei62 – 621Heme (covalent)By similarity
Metal bindingi63 – 631Iron (heme axial ligand)By similarity

GO - Molecular functioni

GO - Biological processi

Complete GO annotation...

Keywords - Biological processi

Electron transport, Photosynthesis, Transport

Keywords - Ligandi

Heme, Iron, Metal-binding

Names & Taxonomyi

Protein namesi
Recommended name:
Cytochrome f
Gene namesi
Name:petA
Encoded oniPlastid; Chloroplast
OrganismiGuillardia theta (Cryptomonas phi)
Taxonomic identifieri55529 [NCBI]
Taxonomic lineageiEukaryotaCryptophytaPyrenomonadalesGeminigeraceaeGuillardia

Subcellular locationi

Topology

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Transmembranei287 – 30620HelicalSequence analysisAdd
BLAST

GO - Cellular componenti

Complete GO annotation...

Keywords - Cellular componenti

Chloroplast, Membrane, Plastid, Thylakoid

PTM / Processingi

Molecule processing

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Signal peptidei1 – 3838By similarityAdd
BLAST
Chaini39 – 321283Cytochrome fPRO_0000023815Add
BLAST

Interactioni

Subunit structurei

The 4 large subunits of the cytochrome b6-f complex are cytochrome b6, subunit IV (17 kDa polypeptide, petD), cytochrome f and the Rieske protein, while the 4 small subunits are PetG, PetL, PetM and PetN. The complex functions as a dimer (By similarity).By similarity

Structurei

3D structure databases

ProteinModelPortaliO78494.
SMRiO78494. Positions 39-321.
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Sequence similaritiesi

Belongs to the cytochrome f family.Curated

Keywords - Domaini

Signal, Transmembrane, Transmembrane helix

Phylogenomic databases

HOGENOMiHOG000024481.

Family and domain databases

Gene3Di1.20.5.700. 1 hit.
2.60.40.830. 2 hits.
HAMAPiMF_00610. Cytb6_f_cytF. 1 hit.
InterProiIPR024058. Cyt-f_TM.
IPR002325. Cyt_f.
IPR024094. Cyt_f_lg_dom.
IPR011054. Rudment_hybrid_motif.
[Graphical view]
PfamiPF01333. Apocytochr_F_C. 1 hit.
PF16639. Apocytochr_F_N. 1 hit.
[Graphical view]
PRINTSiPR00610. CYTOCHROMEF.
SUPFAMiSSF103431. SSF103431. 1 hit.
SSF49441. SSF49441. 2 hits.
SSF51246. SSF51246. 1 hit.
PROSITEiPS51010. CYTF. 1 hit.
[Graphical view]

Sequencei

Sequence statusi: Complete.

Sequence processingi: The displayed sequence is further processed into a mature form.

O78494-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MINLFLLKYK TAFSTFLKPF AYLSLILSVC FYSIQAQAFP VFAQQAYENP
60 70 80 90 100
REATGRIVCA NCHLAQKPVE IEVPQAVLPD TVFEAVVEVP YDLSLQQVTG
110 120 130 140 150
NGTKGPLNVG AVVILPEGFT LAPKDRISSE LKEKTKGLII TPYNEANPNI
160 170 180 190 200
LVVGPVPGKD HQKLVFPVLS PNPAENKNVH FIKYPVYVGA NRGRGQVNPT
210 220 230 240 250
GEKSNNTVYT SPIDGQIVKL EKSDNVTSFS IKSKTGDIIT VKVPFGPDIL
260 270 280 290 300
VKEGQTLVAD QQLTNDPNVG GFGQVETEIV LQSPARVKGL IAFFFTVILA
310 320
QILLVLKKKQ FEKVQLAEMN F
Length:321
Mass (Da):35,173
Last modified:November 1, 1998 - v1
Checksum:i42A1FF89FB05AE3D
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
AF041468 Genomic DNA. Translation: AAC35685.1.
RefSeqiNP_050751.1. NC_000926.1.

Genome annotation databases

GeneIDi857056.

Cross-referencesi

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
AF041468 Genomic DNA. Translation: AAC35685.1.
RefSeqiNP_050751.1. NC_000926.1.

3D structure databases

ProteinModelPortaliO78494.
SMRiO78494. Positions 39-321.
ModBaseiSearch...
MobiDBiSearch...

Protocols and materials databases

Structural Biology KnowledgebaseSearch...

Genome annotation databases

GeneIDi857056.

Phylogenomic databases

HOGENOMiHOG000024481.

Family and domain databases

Gene3Di1.20.5.700. 1 hit.
2.60.40.830. 2 hits.
HAMAPiMF_00610. Cytb6_f_cytF. 1 hit.
InterProiIPR024058. Cyt-f_TM.
IPR002325. Cyt_f.
IPR024094. Cyt_f_lg_dom.
IPR011054. Rudment_hybrid_motif.
[Graphical view]
PfamiPF01333. Apocytochr_F_C. 1 hit.
PF16639. Apocytochr_F_N. 1 hit.
[Graphical view]
PRINTSiPR00610. CYTOCHROMEF.
SUPFAMiSSF103431. SSF103431. 1 hit.
SSF49441. SSF49441. 2 hits.
SSF51246. SSF51246. 1 hit.
PROSITEiPS51010. CYTF. 1 hit.
[Graphical view]
ProtoNetiSearch...

Entry informationi

Entry nameiCYF_GUITH
AccessioniPrimary (citable) accession number: O78494
Entry historyi
Integrated into UniProtKB/Swiss-Prot: December 15, 1998
Last sequence update: November 1, 1998
Last modified: September 7, 2016
This is version 91 of the entry and version 1 of the sequence. [Complete history]
Entry statusiReviewed (UniProtKB/Swiss-Prot)

Miscellaneousi

Documents

  1. SIMILARITY comments
    Index of protein domains and families

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 one 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.