Skip Header

You are using a version of browser that may not display all the features of this website. Please consider upgrading your browser.
Entry version 55 (11 Dec 2019)
Sequence version 1 (30 May 2006)
Previous versions | rss
Help videoAdd a publicationFeedback
Protein

Cytochrome b559 subunit alpha

Gene

psbE

Organism
Helianthus annuus (Common sunflower)
Status
Reviewed-Annotation score:

Annotation score:3 out of 5

<p>The annotation score provides a heuristic measure of the annotation content of a UniProtKB entry or proteome. This score <strong>cannot</strong> be used as a measure of the accuracy of the annotation as we cannot define the ‘correct annotation’ for any given protein.<p><a href='/help/annotation_score' target='_top'>More...</a></p>
-Protein inferred from homologyi <p>This indicates the type of evidence that supports the existence of the protein. Note that the ‘protein existence’ evidence does not give information on the accuracy or correctness of the sequence(s) displayed.<p><a href='/help/protein_existence' target='_top'>More...</a></p>

<p>This section provides any useful information about the protein, mostly biological knowledge.<p><a href='/help/function_section' target='_top'>More...</a></p>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 annotation

<p>This subsection of the ‘Function’ section provides information relevant to cofactors. A cofactor is any non-protein substance required for a protein to be catalytically active. Some cofactors are inorganic, such as the metal atoms zinc, iron, and copper in various oxidation states. Others, such as most vitamins, are organic.<p><a href='/help/cofactor' target='_top'>More...</a></p>Cofactori

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

Sites

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the <a href="http://www.uniprot.org/help/function_section">Function</a> section indicates at which position the protein binds a given metal ion. The nature of the metal is indicated in the ‘Description’ field.<p><a href='/help/metal' target='_top'>More...</a></p>Metal bindingi23Iron (heme axial ligand); shared with beta subunitUniRule annotation1

<p>The <a href="http://www.geneontology.org/">Gene Ontology (GO)</a> project provides a set of hierarchical controlled vocabulary split into 3 categories:<p><a href='/help/gene_ontology' target='_top'>More...</a></p>GO - Molecular functioni

GO - Biological processi

<p>UniProtKB Keywords constitute a <a href="http://www.uniprot.org/keywords">controlled vocabulary</a> with a hierarchical structure. Keywords summarise the content of a UniProtKB entry and facilitate the search for proteins of interest.<p><a href='/help/keywords' target='_top'>More...</a></p>Keywordsi

Biological processElectron transport, Photosynthesis, Transport
LigandHeme, Iron, Metal-binding

<p>This section provides information about the protein and gene name(s) and synonym(s) and about the organism that is the source of the protein sequence.<p><a href='/help/names_and_taxonomy_section' target='_top'>More...</a></p>Names & Taxonomyi

<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section provides an exhaustive list of all names of the protein, from commonly used to obsolete, to allow unambiguous identification of a protein.<p><a href='/help/protein_names' target='_top'>More...</a></p>Protein namesi
Recommended name:
Cytochrome b559 subunit alphaUniRule annotation
Alternative name(s):
PSII reaction center subunit VUniRule annotation
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section indicates the name(s) of the gene(s) that code for the protein sequence(s) described in the entry. Four distinct tokens exist: ‘Name’, ‘Synonyms’, ‘Ordered locus names’ and ‘ORF names’.<p><a href='/help/gene_name' target='_top'>More...</a></p>Gene namesi
Name:psbEUniRule annotation
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section indicates if the gene coding for the protein originates from the hydrogenosome, the mitochondrion, the nucleomorph, different plastids or a plasmid. The absence of this section means that the gene is located in one of the main chromosomal element(s).<p><a href='/help/encoded_on' target='_top'>More...</a></p>Encoded oniPlastid; Chloroplast
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section provides information on the name(s) of the organism that is the source of the protein sequence.<p><a href='/help/organism-name' target='_top'>More...</a></p>OrganismiHelianthus annuus (Common sunflower)
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section shows the unique identifier assigned by the NCBI to the source organism of the protein. This is known as the ‘taxonomic identifier’ or ‘taxid’.<p><a href='/help/taxonomic_identifier' target='_top'>More...</a></p>Taxonomic identifieri4232 [NCBI]
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section contains the taxonomic hierarchical classification lineage of the source organism. It lists the nodes as they appear top-down in the taxonomic tree, with the more general grouping listed first.<p><a href='/help/taxonomic_lineage' target='_top'>More...</a></p>Taxonomic lineageiEukaryotaViridiplantaeStreptophytaEmbryophytaTracheophytaSpermatophytaMagnoliopsidaeudicotyledonsGunneridaePentapetalaeasteridscampanulidsAsteralesAsteraceaeAsteroideaeHeliantheae allianceHeliantheaeHelianthus

<p>This section provides information on the location and the topology of the mature protein in the cell.<p><a href='/help/subcellular_location_section' target='_top'>More...</a></p>Subcellular locationi

Extracellular region or secreted Cytosol Plasma membrane Cell wall Cytoskeleton Vacuole Chloroplast Endosome Peroxisome ER Golgi apparatus Nucleus Mitochondrion Manual annotation Automatic computational assertion Graphics by Christian Stolte & Seán O’Donoghue; Source: COMPARTMENTS

Topology

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the <a href="http://www.uniprot.org/help/subcellular_location_section">'Subcellular location'</a> section describes the extent of a membrane-spanning region of the protein. It denotes the presence of both alpha-helical transmembrane regions and the membrane spanning regions of beta-barrel transmembrane proteins.<p><a href='/help/transmem' target='_top'>More...</a></p>Transmembranei21 – 35HelicalUniRule annotationAdd BLAST15

Keywords - Cellular componenti

Chloroplast, Membrane, Photosystem II, Plastid, Thylakoid

<p>This section describes post-translational modifications (PTMs) and/or processing events.<p><a href='/help/ptm_processing_section' target='_top'>More...</a></p>PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the ‘PTM / Processing’ section describes the extent of a polypeptide chain in the mature protein following processing.<p><a href='/help/chain' target='_top'>More...</a></p>ChainiPRO_00002757081 – 83Cytochrome b559 subunit alphaAdd BLAST83

<p>This section provides information on the quaternary structure of a protein and on interaction(s) with other proteins or protein complexes.<p><a href='/help/interaction_section' target='_top'>More...</a></p>Interactioni

<p>This subsection of the <a href="http://www.uniprot.org/help/interaction_section">'Interaction'</a> section provides information about the protein quaternary structure and interaction(s) with other proteins or protein complexes (with the exception of physiological receptor-ligand interactions which are annotated in the <a href="http://www.uniprot.org/help/function_section">'Function'</a> section).<p><a href='/help/subunit_structure' target='_top'>More...</a></p>Subunit structurei

Heterodimer of an alpha subunit and a beta subunit. 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 of the oxygen-evolving complex and a large number of cofactors. It forms dimeric complexes.

UniRule annotation

<p>This section provides information on the tertiary and secondary structure of a protein.<p><a href='/help/structure_section' target='_top'>More...</a></p>Structurei

3D structure databases

SWISS-MODEL Repository - a database of annotated 3D protein structure models

More...
SMRi
Q1KXU2

Database of comparative protein structure models

More...
ModBasei
Search...

<p>This section provides information on sequence similarities with other proteins and the domain(s) present in a protein.<p><a href='/help/family_and_domains_section' target='_top'>More...</a></p>Family & Domainsi

<p>This subsection of the ‘Family and domains’ section provides information about the sequence similarity with other proteins.<p><a href='/help/sequence_similarities' target='_top'>More...</a></p>Sequence similaritiesi

Belongs to the PsbE/PsbF family.UniRule annotation

Keywords - Domaini

Transmembrane, Transmembrane helix

Phylogenomic databases

KEGG Orthology (KO)

More...
KOi
K02707

Identification of Orthologs from Complete Genome Data

More...
OMAi
VRYWVIH

Database of Orthologous Groups

More...
OrthoDBi
1506855at2759

Family and domain databases

Gene3D Structural and Functional Annotation of Protein Families

More...
Gene3Di
1.20.5.860, 1 hit

HAMAP database of protein families

More...
HAMAPi
MF_00642 PSII_PsbE, 1 hit

Integrated resource of protein families, domains and functional sites

More...
InterProi
View protein in InterPro
IPR006217 PSII_cyt_b559_asu
IPR037025 PSII_cyt_b559_asu_sf
IPR006216 PSII_cyt_b559_CS
IPR013081 PSII_cyt_b559_N
IPR013082 PSII_cytb559_asu_lum

Pfam protein domain database

More...
Pfami
View protein in Pfam
PF00283 Cytochrom_B559, 1 hit
PF00284 Cytochrom_B559a, 1 hit

PIRSF; a whole-protein classification database

More...
PIRSFi
PIRSF000036 PsbE, 1 hit

TIGRFAMs; a protein family database

More...
TIGRFAMsi
TIGR01332 cyt_b559_alpha, 1 hit

PROSITE; a protein domain and family database

More...
PROSITEi
View protein in PROSITE
PS00537 CYTOCHROME_B559, 1 hit

<p>This section displays by default the canonical protein sequence and upon request all isoforms described in the entry. It also includes information pertinent to the sequence(s), including <a href="http://www.uniprot.org/help/sequence_length">length</a> and <a href="http://www.uniprot.org/help/sequences">molecular weight</a>. The information is filed in different subsections. The current subsections and their content are listed below:<p><a href='/help/sequences_section' target='_top'>More...</a></p>Sequencei

<p>This subsection of the <a href="http://www.uniprot.org/help/sequences_section">Sequence</a> section indicates if the <a href="http://www.uniprot.org/help/canonical_and_isoforms">canonical sequence</a> displayed by default in the entry is complete or not.<p><a href='/help/sequence_status' target='_top'>More...</a></p>Sequence statusi: Complete.

Q1KXU2-1 [UniParc]FASTAAdd to basket
« Hide
        10         20         30         40         50
MSGSTGERSF ADIITSIRYW VIHSITIPSL FIAGWLFVST GLAYDVFGSP
60 70 80
RPNEYFTENR QGIPLITGRF DSLEQLDEFS RSF
Length:83
Mass (Da):9,414
Last modified:May 30, 2006 - v1
<p>The checksum is a form of redundancy check that is calculated from the sequence. It is useful for tracking sequence updates.</p> <p>It should be noted that while, in theory, two different sequences could have the same checksum value, the likelihood that this would happen is extremely low.</p> <p>However UniProtKB may contain entries with identical sequences in case of multiple genes (paralogs).</p> <p>The checksum is computed as the sequence 64-bit Cyclic Redundancy Check value (CRC64) using the generator polynomial: x<sup>64</sup> + x<sup>4</sup> + x<sup>3</sup> + x + 1. The algorithm is described in the ISO 3309 standard. </p> <p class="publication">Press W.H., Flannery B.P., Teukolsky S.A. and Vetterling W.T.<br /> <strong>Cyclic redundancy and other checksums</strong><br /> <a href="http://www.nrbook.com/b/bookcpdf.php">Numerical recipes in C 2nd ed., pp896-902, Cambridge University Press (1993)</a>)</p> Checksum:iED325C8BCABACDDE
GO

Sequence databases

Select the link destinations:

EMBL nucleotide sequence database

More...
EMBLi

GenBank nucleotide sequence database

More...
GenBanki

DNA Data Bank of Japan; a nucleotide sequence database

More...
DDBJi
Links Updated
DQ383815 Genomic DNA Translation: ABD47163.1

NCBI Reference Sequences

More...
RefSeqi
YP_588134.1, NC_007977.1

Genome annotation databases

Ensembl plant genome annotation project

More...
EnsemblPlantsi
OTF84764; OTF84764; HannXRQ_CPg0580061
OTF93082; OTF93082; HannXRQ_Chr16g0529011
OTG07130; OTG07130; HannXRQ_Chr11g0326851
OTG10075; OTG10075; HannXRQ_Chr10g0283581
OTG10134; OTG10134; HannXRQ_Chr10g0284271
OTG10588; OTG10588; HannXRQ_Chr10g0289291
OTG13223; OTG13223; HannXRQ_Chr10g0318171
OTG37580; OTG37580; HannXRQ_Chr01g0020331

Database of genes from NCBI RefSeq genomes

More...
GeneIDi
4055671

Gramene; a comparative resource for plants

More...
Gramenei
OTF84764; OTF84764; HannXRQ_CPg0580061
OTF93082; OTF93082; HannXRQ_Chr16g0529011
OTG07130; OTG07130; HannXRQ_Chr11g0326851
OTG10075; OTG10075; HannXRQ_Chr10g0283581
OTG10134; OTG10134; HannXRQ_Chr10g0284271
OTG10588; OTG10588; HannXRQ_Chr10g0289291
OTG13223; OTG13223; HannXRQ_Chr10g0318171
OTG37580; OTG37580; HannXRQ_Chr01g0020331

KEGG: Kyoto Encyclopedia of Genes and Genomes

More...
KEGGi
han:4055671

<p>This section provides links to proteins that are similar to the protein sequence(s) described in this entry at different levels of sequence identity thresholds (100%, 90% and 50%) based on their membership in UniProt Reference Clusters (<a href="http://www.uniprot.org/help/uniref">UniRef</a>).<p><a href='/help/similar_proteins_section' target='_top'>More...</a></p>Similar proteinsi

<p>This section is used to point to information related to entries and found in data collections other than UniProtKB.<p><a href='/help/cross_references_section' target='_top'>More...</a></p>Cross-referencesi

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
DQ383815 Genomic DNA Translation: ABD47163.1
RefSeqiYP_588134.1, NC_007977.1

3D structure databases

SMRiQ1KXU2
ModBaseiSearch...

Genome annotation databases

EnsemblPlantsiOTF84764; OTF84764; HannXRQ_CPg0580061
OTF93082; OTF93082; HannXRQ_Chr16g0529011
OTG07130; OTG07130; HannXRQ_Chr11g0326851
OTG10075; OTG10075; HannXRQ_Chr10g0283581
OTG10134; OTG10134; HannXRQ_Chr10g0284271
OTG10588; OTG10588; HannXRQ_Chr10g0289291
OTG13223; OTG13223; HannXRQ_Chr10g0318171
OTG37580; OTG37580; HannXRQ_Chr01g0020331
GeneIDi4055671
GrameneiOTF84764; OTF84764; HannXRQ_CPg0580061
OTF93082; OTF93082; HannXRQ_Chr16g0529011
OTG07130; OTG07130; HannXRQ_Chr11g0326851
OTG10075; OTG10075; HannXRQ_Chr10g0283581
OTG10134; OTG10134; HannXRQ_Chr10g0284271
OTG10588; OTG10588; HannXRQ_Chr10g0289291
OTG13223; OTG13223; HannXRQ_Chr10g0318171
OTG37580; OTG37580; HannXRQ_Chr01g0020331
KEGGihan:4055671

Phylogenomic databases

KOiK02707
OMAiVRYWVIH
OrthoDBi1506855at2759

Family and domain databases

Gene3Di1.20.5.860, 1 hit
HAMAPiMF_00642 PSII_PsbE, 1 hit
InterProiView protein in InterPro
IPR006217 PSII_cyt_b559_asu
IPR037025 PSII_cyt_b559_asu_sf
IPR006216 PSII_cyt_b559_CS
IPR013081 PSII_cyt_b559_N
IPR013082 PSII_cytb559_asu_lum
PfamiView protein in Pfam
PF00283 Cytochrom_B559, 1 hit
PF00284 Cytochrom_B559a, 1 hit
PIRSFiPIRSF000036 PsbE, 1 hit
TIGRFAMsiTIGR01332 cyt_b559_alpha, 1 hit
PROSITEiView protein in PROSITE
PS00537 CYTOCHROME_B559, 1 hit

ProtoNet; Automatic hierarchical classification of proteins

More...
ProtoNeti
Search...

MobiDB: a database of protein disorder and mobility annotations

More...
MobiDBi
Search...

<p>This section provides general information on the entry.<p><a href='/help/entry_information_section' target='_top'>More...</a></p>Entry informationi

<p>This subsection of the ‘Entry information’ section provides a mnemonic identifier for a UniProtKB entry, but it is not a stable identifier. Each reviewed entry is assigned a unique entry name upon integration into UniProtKB/Swiss-Prot.<p><a href='/help/entry_name' target='_top'>More...</a></p>Entry nameiPSBE_HELAN
<p>This subsection of the ‘Entry information’ section provides one or more accession number(s). These are stable identifiers and should be used to cite UniProtKB entries. Upon integration into UniProtKB, each entry is assigned a unique accession number, which is called ‘Primary (citable) accession number’.<p><a href='/help/accession_numbers' target='_top'>More...</a></p>AccessioniPrimary (citable) accession number: Q1KXU2
<p>This subsection of the ‘Entry information’ section shows the date of integration of the entry into UniProtKB, the date of the last sequence update and the date of the last annotation modification (‘Last modified’). The version number for both the entry and the <a href="http://www.uniprot.org/help/canonical_and_isoforms">canonical sequence</a> are also displayed.<p><a href='/help/entry_history' target='_top'>More...</a></p>Entry historyiIntegrated into UniProtKB/Swiss-Prot: February 6, 2007
Last sequence update: May 30, 2006
Last modified: December 11, 2019
This is version 55 of the entry and version 1 of the sequence. See complete history.
<p>This subsection of the ‘Entry information’ section indicates whether the entry has been manually annotated and reviewed by UniProtKB curators or not, in other words, if the entry belongs to the Swiss-Prot section of UniProtKB (<strong>reviewed</strong>) or to the computer-annotated TrEMBL section (<strong>unreviewed</strong>).<p><a href='/help/entry_status' target='_top'>More...</a></p>Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programPlant Protein Annotation Program

<p>This section contains any relevant information that doesn’t fit in any other defined sections<p><a href='/help/miscellaneous_section' target='_top'>More...</a></p>Miscellaneousi

Documents

  1. SIMILARITY comments
    Index of protein domains and families
UniProt is an ELIXIR core data resource
Main funding by: National Institutes of Health

We'd like to inform you that we have updated our Privacy Notice to comply with Europe’s new General Data Protection Regulation (GDPR) that applies since 25 May 2018.

Do not show this banner again