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Protein

Cytochrome b6-f complex subunit 6

Gene

petL

Organism
Chlamydomonas reinhardtii (Chlamydomonas smithii)
Status
Reviewed-Annotation score: Annotation score: 4 out of 5-Experimental evidence at protein leveli

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. PetL is important for photoautotrophic growth as well as for electron transfer efficiency and stability of the cytochrome b6-f complex.UniRule annotation

GO - Molecular functioni

GO - Biological processi

Complete GO annotation...

Keywords - Biological processi

Electron transport, Photosynthesis, Transport

Enzyme and pathway databases

BioCyciCHLAMY:CHRECP068-MONOMER.
MetaCyc:CHRECP068-MONOMER.

Names & Taxonomyi

Protein namesi
Recommended name:
Cytochrome b6-f complex subunit 6UniRule annotation
Alternative name(s):
Cytochrome b6-f complex subunit PetLUniRule annotation
Cytochrome b6-f complex subunit VIUniRule annotation
Gene namesi
Name:petLUniRule annotation
Encoded oniPlastid; Chloroplast
OrganismiChlamydomonas reinhardtii (Chlamydomonas smithii)
Taxonomic identifieri3055 [NCBI]
Taxonomic lineageiEukaryotaViridiplantaeChlorophytaChlorophyceaeChlamydomonadalesChlamydomonadaceaeChlamydomonas
Proteomesi
  • UP000006906 Componenti: Chloroplast

Subcellular locationi

  • Plastidchloroplast thylakoid membrane UniRule annotation; Single-pass membrane protein UniRule annotation

Topology

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Transmembranei17 – 3721HelicalUniRule annotationAdd
BLAST

GO - Cellular componenti

Complete GO annotation...

Keywords - Cellular componenti

Chloroplast, Membrane, Plastid, Thylakoid

PTM / Processingi

Molecule processing

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Chaini1 – 4343Cytochrome b6-f complex subunit 6PRO_0000220445Add
BLAST

Post-translational modificationi

The N-terminus is blocked.

Proteomic databases

PaxDbiP50369.

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.UniRule annotation

Protein-protein interaction databases

STRINGi3055.DAA00968.

Structurei

Secondary structure

1
43
Legend: HelixTurnBeta strand
Show more details
Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Helixi13 – 3725Combined sources

3D structure databases

Select the link destinations:
PDBei
RCSB PDBi
PDBji
Links Updated
EntryMethodResolution (Å)ChainPositionsPDBsum
1Q90X-ray3.10L12-43[»]
ProteinModelPortaliP50369.
SMRiP50369. Positions 12-43.
ModBaseiSearch...
MobiDBiSearch...

Miscellaneous databases

EvolutionaryTraceiP50369.

Family & Domainsi

Sequence similaritiesi

Belongs to the PetL family.UniRule annotation

Keywords - Domaini

Transmembrane, Transmembrane helix

Family and domain databases

HAMAPiMF_00433. Cytb6_f_PetL. 1 hit.
InterProiIPR007802. Cyt_b6/f_cplx_su6.
[Graphical view]
PfamiPF05115. PetL. 1 hit.
[Graphical view]

Sequencei

Sequence statusi: Complete.

P50369-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40 
MIFDFNYIHI FMLTITSYVG LLIGALVFTL GIYLGLLKVV KLI
Length:43
Mass (Da):4,878
Last modified:July 11, 2003 - v3
Checksum:iB7E6977ED788C9F3
GO

Sequence cautioni

The sequence ACJ50155 differs from that shown. Reason: Erroneous initiation. Curated

Mass spectrometryi

Molecular mass is 3467 Da from positions 1 - 30. Determined by MALDI. 1 Publication
Molecular mass is 3918 Da from positions 5 - 39. Determined by MALDI. 1 Publication

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
U43964 Genomic DNA. Translation: AAB17716.1.
FJ423446 Genomic DNA. Translation: ACJ50155.1. Different initiation.
BK000554 Genomic DNA. Translation: DAA00968.1.
PIRiT08024.
RefSeqiNP_958424.2. NC_005353.1.

Genome annotation databases

EnsemblPlantsiDAA00968; DAA00968; DAA00968.
GeneIDi2717047.
GrameneiDAA00968; DAA00968; DAA00968.
KEGGicre:ChreCp068.

Cross-referencesi

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
U43964 Genomic DNA. Translation: AAB17716.1.
FJ423446 Genomic DNA. Translation: ACJ50155.1. Different initiation.
BK000554 Genomic DNA. Translation: DAA00968.1.
PIRiT08024.
RefSeqiNP_958424.2. NC_005353.1.

3D structure databases

Select the link destinations:
PDBei
RCSB PDBi
PDBji
Links Updated
EntryMethodResolution (Å)ChainPositionsPDBsum
1Q90X-ray3.10L12-43[»]
ProteinModelPortaliP50369.
SMRiP50369. Positions 12-43.
ModBaseiSearch...
MobiDBiSearch...

Protein-protein interaction databases

STRINGi3055.DAA00968.

Proteomic databases

PaxDbiP50369.

Protocols and materials databases

Structural Biology KnowledgebaseSearch...

Genome annotation databases

EnsemblPlantsiDAA00968; DAA00968; DAA00968.
GeneIDi2717047.
GrameneiDAA00968; DAA00968; DAA00968.
KEGGicre:ChreCp068.

Enzyme and pathway databases

BioCyciCHLAMY:CHRECP068-MONOMER.
MetaCyc:CHRECP068-MONOMER.

Miscellaneous databases

EvolutionaryTraceiP50369.

Family and domain databases

HAMAPiMF_00433. Cytb6_f_PetL. 1 hit.
InterProiIPR007802. Cyt_b6/f_cplx_su6.
[Graphical view]
PfamiPF05115. PetL. 1 hit.
[Graphical view]
ProtoNetiSearch...

Entry informationi

Entry nameiPETL_CHLRE
AccessioniPrimary (citable) accession number: P50369
Secondary accession number(s): B7U1K8
Entry historyi
Integrated into UniProtKB/Swiss-Prot: October 1, 1996
Last sequence update: July 11, 2003
Last modified: February 17, 2016
This is version 89 of the entry and version 3 of the sequence. [Complete history]
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programPlant Protein Annotation Program

Miscellaneousi

Miscellaneous

A deletion of this gene can be substituted for by a subunit IV-petL fusion. The fusion protein does not permit state transitions, although all other functions are wild-type.

Caution

Mass spectrometry indicates that the start site is probably Met-1, and not Met-12 as is thought to be the case in other organisms.Curated

Keywords - Technical termi

3D-structure, Complete proteome, Reference proteome

Documents

  1. PDB cross-references
    Index of Protein Data Bank (PDB) cross-references
  2. 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.