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Entry version 18 (07 Apr 2021)
Sequence version 1 (13 Apr 2016)
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Protein

Photosystem I P700 chlorophyll a apoprotein A1

Gene

psaA

Organism
Ceanothus herbaceus
Status
Unreviewed-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

PsaA and PsaB bind P700, the primary electron donor of photosystem I (PSI), as well as the electron acceptors A0, A1 and FX. PSI is a plastocyanin-ferredoxin oxidoreductase, converting photonic excitation into a charge separation, which transfers an electron from the donor P700 chlorophyll pair to the spectroscopically characterized acceptors A0, A1, FX, FA and FB in turn. Oxidized P700 is reduced on the lumenal side of the thylakoid membrane by plastocyanin.UniRule annotationARBA annotation

<p>This subsection of the <a href="http://www.uniprot.org/help/function%5Fsection">Function</a> section describes the catalytic activity of an enzyme, i.e. a chemical reaction that the enzyme catalyzes.<p><a href='/help/catalytic_activity' target='_top'>More...</a></p>Catalytic activityi

<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

Note: P700 is a chlorophyll a/chlorophyll a' dimer, A0 is one or more chlorophyll a, A1 is one or both phylloquinones and FX is a shared 4Fe-4S iron-sulfur center.UniRule annotation

Sites

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the <a href="http://www.uniprot.org/help/function%5Fsection">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 bindingi573Iron-sulfur (4Fe-4S); shared with dimeric partnerUniRule annotation1
Metal bindingi582Iron-sulfur (4Fe-4S); shared with dimeric partnerUniRule annotation1
Metal bindingi675Magnesium (chlorophyll-a' A1 axial ligand; P700 special pair)UniRule annotation1
Metal bindingi683Magnesium (chlorophyll-a A3 axial ligand)UniRule annotation1
<p>This subsection of the <a href="http://www.uniprot.org/help/function%5Fsection">Function</a> section describes the interaction between a single amino acid and another chemical entity. Priority is given to the annotation of physiological ligands.<p><a href='/help/binding' target='_top'>More...</a></p>Binding sitei691Chlorophyll-a A3UniRule annotation1
Binding sitei692Phylloquinone AUniRule 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

Molecular functionOxidoreductaseUniRule annotationARBA annotation
Biological processElectron transportUniRule annotationARBA annotation, Photosynthesis, Transport
Ligand4Fe-4SUniRule annotationARBA annotation, ChlorophyllUniRule annotationARBA annotation, Chromophore, Iron, Iron-sulfur, MagnesiumUniRule annotationARBA annotation, 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%5Fand%5Ftaxonomy%5Fsection">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:
Photosystem I P700 chlorophyll a apoprotein A1UniRule annotationARBA annotation (EC:1.97.1.12UniRule annotationARBA annotation)
Alternative name(s):
PSI-AUniRule annotation
PsaAUniRule annotationARBA annotation
<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">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:psaAUniRule annotation
<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">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; ChloroplastImported
<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">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>OrganismiCeanothus herbaceusImported
<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">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 identifieri73683 [NCBI]
<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">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 lineageiEukaryotaViridiplantaeStreptophytaEmbryophytaTracheophytaSpermatophytaMagnoliopsidaeudicotyledonsGunneridaePentapetalaerosidsfabidsRosalesRhamnaceaeRhamnaceae incertae sedisCeanothus

<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

Topology

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the <a href="http://www.uniprot.org/help/subcellular%5Flocation%5Fsection">'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>Transmembranei71 – 90HelicalSequence analysisAdd BLAST20
Transmembranei156 – 178HelicalSequence analysisAdd BLAST23
Transmembranei350 – 370HelicalSequence analysisAdd BLAST21
Transmembranei390 – 412HelicalSequence analysisAdd BLAST23
Transmembranei433 – 454HelicalSequence analysisAdd BLAST22
Transmembranei531 – 549HelicalSequence analysisAdd BLAST19
Transmembranei590 – 610HelicalSequence analysisAdd BLAST21
Transmembranei664 – 686HelicalSequence analysisAdd BLAST23
Transmembranei730 – 748HelicalSequence analysisAdd BLAST19

Keywords - Cellular componenti

ChloroplastImportedARBA annotation, Membrane, Photosystem IUniRule annotationARBA annotation, Plastid, ThylakoidUniRule annotationARBA annotation

<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%5Fsection">'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%5Fsection">'Function'</a> section).<p><a href='/help/subunit_structure' target='_top'>More...</a></p>Subunit structurei

The PsaA/B heterodimer binds the P700 chlorophyll special pair and subsequent electron acceptors. PSI consists of a core antenna complex that captures photons, and an electron transfer chain that converts photonic excitation into a charge separation. The eukaryotic PSI reaction center is composed of at least 11 subunits.

UniRule annotation

<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 PsaA/PsaB family.UniRule annotationARBA annotation

Keywords - Domaini

Transmembrane, Transmembrane helixUniRule annotationARBA annotation

Family and domain databases

Gene3D Structural and Functional Annotation of Protein Families

More...
Gene3Di
1.20.1130.10, 1 hit

HAMAP database of protein families

More...
HAMAPi
MF_00458, PSI_PsaA, 1 hit

Integrated resource of protein families, domains and functional sites

More...
InterProi
View protein in InterPro
IPR006243, PSI_PsaA
IPR001280, PSI_PsaA/B
IPR020586, PSI_PsaA/B_CS
IPR036408, PSI_PsaA/B_sf

The PANTHER Classification System

More...
PANTHERi
PTHR30128:SF61, PTHR30128:SF61, 1 hit

Pfam protein domain database

More...
Pfami
View protein in Pfam
PF00223, PsaA_PsaB, 1 hit

PIRSF; a whole-protein classification database

More...
PIRSFi
PIRSF002905, PSI_A, 1 hit

Protein Motif fingerprint database; a protein domain database

More...
PRINTSi
PR00257, PHOTSYSPSAAB

Superfamily database of structural and functional annotation

More...
SUPFAMi
SSF81558, SSF81558, 1 hit

TIGRFAMs; a protein family database

More...
TIGRFAMsi
TIGR01335, psaA, 1 hit

PROSITE; a protein domain and family database

More...
PROSITEi
View protein in PROSITE
PS00419, PHOTOSYSTEM_I_PSAAB, 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%5Flength">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%5Fsection">Sequence</a> section indicates if the <a href="http://www.uniprot.org/help/canonical%5Fand%5Fisoforms">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.

A0A110BDM1-1 [UniParc]FASTAAdd to basket
« Hide
        10         20         30         40         50
MIIRSPEPEV KILVDRDPVK TSFEEWARPG HFSRTIAKGP DTTTWIWNLH
60 70 80 90 100
ADAHDFDSHT NDLEEISRKV FSAHFGQLSI IFLWLSGMYF HGARFSNYEA
110 120 130 140 150
WLSDPTHIGP SAQVVWPIVG QEILNGDVGG GFRGIQITSG FFQIWRASGI
160 170 180 190 200
TSELQLYCTA IGALVFAGLM LFAGWFHYHK AAPKLAWFQD VESMLNHHLA
210 220 230 240 250
GLLGLGSLSW AGHQVHVSLP INQFLNAGVD PKEIPLPHEF ILNRDLLAQL
260 270 280 290 300
YPSFAEGATP FFTLNWSKYA EFLTFRGGLD PVTGGLWLTD IAHHHLAIAI
310 320 330 340 350
LFLIAGHMYR TNWGIGHGIK DILEAHKGPF TGQGHKGLYE ILTTSWHAQL
360 370 380 390 400
SINLAMLGSL TIVVAHHMYS MPPYPYLATD YGTQLSLFTH HMWIGGFLIV
410 420 430 440 450
GAAAHAAIFM VRDYDPTTRY NDLLDRVLRH RDAIISHLNW VCIFLGFHSF
460 470 480 490 500
GLYIHNDTMS ALGRPQDMFS DTAIQLQPVF AQWIQNTHAL APGATAPGAT
510 520 530 540 550
TSTSLTWGGG DLVAVGGKVA LLPIPLGTAD FLVHHIHAFT IHVTVLILLK
560 570 580 590 600
GVLFARSSRL IPDKANLGFR FPCDGPGRGG TCQVSAWDHV FLGLFWMYNA
610 620 630 640 650
ISVVIFHFSW KMQSDVWGSI SDQGVVTHIT GGNFAQSSIT INGWLRDFLW
660 670 680 690 700
AQASQVIQSY GSSLSAYGLF FLGAHFVWAF SLMFLFSGRG YWQELIESIV
710 720 730 740 750
WAHNKLKVAP ATQPRALSIV QGRAVGVTHY LLGGIATTWA FFLARIIAVG
Length:750
Mass (Da):83,117
Last modified:April 13, 2016 - 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:i249F9A734BDC7E6B
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
KT457437 Genomic DNA Translation: AMC31406.1

<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
KT457437 Genomic DNA Translation: AMC31406.1

3D structure databases

Database of comparative protein structure models

More...
ModBasei
Search...

SWISS-MODEL Interactive Workspace

More...
SWISS-MODEL-Workspacei
Submit a new modelling project...

Family and domain databases

Gene3Di1.20.1130.10, 1 hit
HAMAPiMF_00458, PSI_PsaA, 1 hit
InterProiView protein in InterPro
IPR006243, PSI_PsaA
IPR001280, PSI_PsaA/B
IPR020586, PSI_PsaA/B_CS
IPR036408, PSI_PsaA/B_sf
PANTHERiPTHR30128:SF61, PTHR30128:SF61, 1 hit
PfamiView protein in Pfam
PF00223, PsaA_PsaB, 1 hit
PIRSFiPIRSF002905, PSI_A, 1 hit
PRINTSiPR00257, PHOTSYSPSAAB
SUPFAMiSSF81558, SSF81558, 1 hit
TIGRFAMsiTIGR01335, psaA, 1 hit
PROSITEiView protein in PROSITE
PS00419, PHOTOSYSTEM_I_PSAAB, 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 nameiA0A110BDM1_9ROSA
<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: A0A110BDM1
<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%5Fand%5Fisoforms">canonical sequence</a> are also displayed.<p><a href='/help/entry_history' target='_top'>More...</a></p>Entry historyiIntegrated into UniProtKB/TrEMBL: April 13, 2016
Last sequence update: April 13, 2016
Last modified: April 7, 2021
This is version 18 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 statusiUnreviewed (UniProtKB/TrEMBL)
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