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Protein

Cytochrome b559 subunit alpha

Gene

psbE

Organism
Thermosynechococcus elongatus (strain BP-1)
Status
Reviewed-Annotation score: Annotation score: 5 out of 5-Experimental evidence at protein leveli

Functioni

This b-type cytochrome is tightly associated with the reaction center of photosystem II (PSII). PSII is a light-driven water:plastoquinone oxidoreductase that uses light energy to abstract electrons from H2O, generating O2 and a proton gradient subsequently used for ATP formation. It consists of a core antenna complex that captures photons, and an electron transfer chain that converts photonic excitation into a charge separation.UniRule annotation3 Publications

Cofactori

heme bUniRule annotation12 PublicationsNote: With its partner (PsbF) binds heme. PSII binds additional chlorophylls, carotenoids and specific lipids.UniRule annotation12 Publications

Sites

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Metal bindingi23Iron (heme axial ligand); shared with beta subunit8 PublicationsUniRule annotation2 Publications1

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 b559 subunit alphaUniRule annotation
Alternative name(s):
PSII reaction center subunit VUniRule annotation
Gene namesi
Name:psbEUniRule annotation
Ordered Locus Names:tsr1541
OrganismiThermosynechococcus elongatus (strain BP-1)
Taxonomic identifieri197221 [NCBI]
Taxonomic lineageiBacteriaCyanobacteriaSynechococcalesSynechococcaceaeThermosynechococcus
Proteomesi
  • UP000000440 Componenti: Chromosome

Subcellular locationi

Topology

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Topological domaini2 – 19Cytoplasmic1 PublicationAdd BLAST18
Transmembranei20 – 35Helical1 PublicationAdd BLAST16
Topological domaini36 – 84Lumenal1 PublicationAdd BLAST49

GO - Cellular componenti

Complete GO annotation...

Keywords - Cellular componenti

Membrane, Photosystem II, Thylakoid

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Initiator methionineiRemoved3 Publications
ChainiPRO_00002003432 – 84Cytochrome b559 subunit alphaAdd BLAST83

Interactioni

Subunit structurei

Heterodimer of an alpha subunit and a beta subunit. Cyanobacterial PSII is composed of 1 copy each of membrane proteins PsbA, PsbB, PsbC, PsbD, PsbE, PsbF, PsbH, PsbI, PsbJ, PsbK, PsbL, PsbM, PsbT, PsbX, PsbY, PsbZ, Ycf12, at least 3 peripheral proteins PsbO, PsbU, PsbV and a large number of cofactors. It forms dimeric complexes.UniRule annotation12 Publications

Protein-protein interaction databases

DIPiDIP-48491N.
STRINGi197221.tsr1541.

Structurei

Secondary structure

184
Legend: HelixTurnBeta strandPDB Structure known for this area
Show more details
Feature keyPosition(s)DescriptionActionsGraphical viewLength
Helixi10 – 13Combined sources4
Helixi17 – 39Combined sources23
Helixi42 – 47Combined sources6
Beta strandi54 – 56Combined sources3
Beta strandi69 – 71Combined sources3
Helixi72 – 81Combined sources10

3D structure databases

Select the link destinations:
PDBei
RCSB PDBi
PDBji
Links Updated
PDB entryMethodResolution (Å)ChainPositionsPDBsum
1S5LX-ray3.50E/e1-84[»]
1W5CX-ray3.20E/K1-84[»]
2AXTX-ray3.00E/e1-84[»]
3KZIX-ray3.60E2-84[»]
4FBYX-ray6.56E/R2-84[»]
4IXQX-ray5.70E/e1-84[»]
4IXRX-ray5.90E/e1-84[»]
4PBUX-ray5.00E/e4-84[»]
4PJ0X-ray2.44E/e1-84[»]
4RVYX-ray5.50E/e4-84[»]
4TNHX-ray4.90E/e1-84[»]
4TNIX-ray4.60E/e1-84[»]
4TNJX-ray4.50E/e1-84[»]
4TNKX-ray5.20E/e1-84[»]
4V62X-ray2.90AE/BE1-84[»]
4V82X-ray3.20AE/BE1-84[»]
5E7CX-ray4.50E/e4-84[»]
ProteinModelPortaliQ8DIP0.
SMRiQ8DIP0.
ModBaseiSearch...
MobiDBiSearch...

Miscellaneous databases

EvolutionaryTraceiQ8DIP0.

Family & Domainsi

Sequence similaritiesi

Belongs to the PsbE/PsbF family.UniRule annotation

Keywords - Domaini

Transmembrane, Transmembrane helix

Phylogenomic databases

eggNOGiENOG4105NT3. Bacteria.
ENOG4111X01. LUCA.
HOGENOMiHOG000254797.
KOiK02707.
OMAiVRYWVIH.
OrthoDBiPOG091H14HV.

Family and domain databases

HAMAPiMF_00642. PSII_PsbE. 1 hit.
InterProiIPR006217. PSII_cyt_b559_asu.
IPR006216. PSII_cyt_b559_CS.
IPR013081. PSII_cyt_b559_N.
IPR013082. PSII_cytb559_asu_lum.
[Graphical view]
PfamiPF00283. Cytochrom_B559. 1 hit.
PF00284. Cytochrom_B559a. 1 hit.
[Graphical view]
PIRSFiPIRSF000036. PsbE. 1 hit.
TIGRFAMsiTIGR01332. cyt_b559_alpha. 1 hit.
PROSITEiPS00537. CYTOCHROME_B559. 1 hit.
[Graphical view]

Sequencei

Sequence statusi: Complete.

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

Q8DIP0-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MAGTTGERPF SDIITSVRYW VIHSITIPAL FIAGWLFVST GLAYDVFGTP
60 70 80
RPDSYYAQEQ RSIPLVTDRF EAKQQVETFL EQLK
Length:84
Mass (Da):9,573
Last modified:January 23, 2007 - v3
Checksum:i19C7A074624D937F
GO

Mass spectrometryi

Molecular mass is 9446±6 Da from positions 2 - 84. Determined by MALDI. 1 Publication
Molecular mass is 9440 Da from positions 2 - 84. Determined by MALDI. 1 Publication

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
BA000039 Genomic DNA. Translation: BAC09093.1.
RefSeqiNP_682331.1. NC_004113.1.
WP_011057381.1. NC_004113.1.

Genome annotation databases

EnsemblBacteriaiBAC09093; BAC09093; BAC09093.
GeneIDi1011075.
KEGGitel:tsr1541.
PATRICi23928446. VBITheElo119873_1617.

Cross-referencesi

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
BA000039 Genomic DNA. Translation: BAC09093.1.
RefSeqiNP_682331.1. NC_004113.1.
WP_011057381.1. NC_004113.1.

3D structure databases

Select the link destinations:
PDBei
RCSB PDBi
PDBji
Links Updated
PDB entryMethodResolution (Å)ChainPositionsPDBsum
1S5LX-ray3.50E/e1-84[»]
1W5CX-ray3.20E/K1-84[»]
2AXTX-ray3.00E/e1-84[»]
3KZIX-ray3.60E2-84[»]
4FBYX-ray6.56E/R2-84[»]
4IXQX-ray5.70E/e1-84[»]
4IXRX-ray5.90E/e1-84[»]
4PBUX-ray5.00E/e4-84[»]
4PJ0X-ray2.44E/e1-84[»]
4RVYX-ray5.50E/e4-84[»]
4TNHX-ray4.90E/e1-84[»]
4TNIX-ray4.60E/e1-84[»]
4TNJX-ray4.50E/e1-84[»]
4TNKX-ray5.20E/e1-84[»]
4V62X-ray2.90AE/BE1-84[»]
4V82X-ray3.20AE/BE1-84[»]
5E7CX-ray4.50E/e4-84[»]
ProteinModelPortaliQ8DIP0.
SMRiQ8DIP0.
ModBaseiSearch...
MobiDBiSearch...

Protein-protein interaction databases

DIPiDIP-48491N.
STRINGi197221.tsr1541.

Protocols and materials databases

Structural Biology KnowledgebaseSearch...

Genome annotation databases

EnsemblBacteriaiBAC09093; BAC09093; BAC09093.
GeneIDi1011075.
KEGGitel:tsr1541.
PATRICi23928446. VBITheElo119873_1617.

Phylogenomic databases

eggNOGiENOG4105NT3. Bacteria.
ENOG4111X01. LUCA.
HOGENOMiHOG000254797.
KOiK02707.
OMAiVRYWVIH.
OrthoDBiPOG091H14HV.

Miscellaneous databases

EvolutionaryTraceiQ8DIP0.

Family and domain databases

HAMAPiMF_00642. PSII_PsbE. 1 hit.
InterProiIPR006217. PSII_cyt_b559_asu.
IPR006216. PSII_cyt_b559_CS.
IPR013081. PSII_cyt_b559_N.
IPR013082. PSII_cytb559_asu_lum.
[Graphical view]
PfamiPF00283. Cytochrom_B559. 1 hit.
PF00284. Cytochrom_B559a. 1 hit.
[Graphical view]
PIRSFiPIRSF000036. PsbE. 1 hit.
TIGRFAMsiTIGR01332. cyt_b559_alpha. 1 hit.
PROSITEiPS00537. CYTOCHROME_B559. 1 hit.
[Graphical view]
ProtoNetiSearch...

Entry informationi

Entry nameiPSBE_THEEB
AccessioniPrimary (citable) accession number: Q8DIP0
Entry historyi
Integrated into UniProtKB/Swiss-Prot: May 30, 2003
Last sequence update: January 23, 2007
Last modified: November 2, 2016
This is version 109 of the entry and version 3 of the sequence. [Complete history]
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programProkaryotic Protein Annotation Program

Miscellaneousi

Keywords - Technical termi

3D-structure, Complete proteome, Direct protein sequencing, 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.