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A0T0L9

- PSAA_PHATC

UniProt

A0T0L9 - PSAA_PHATC

Protein

Photosystem I P700 chlorophyll a apoprotein A1

Gene

psaA

Organism
Phaeodactylum tricornutum (strain CCAP 1055/1)
Status
Reviewed - Annotation score: 4 out of 5- Protein inferred from homologyi
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    • History
      Entry version 44 (01 Oct 2014)
      Sequence version 1 (09 Jan 2007)
      Previous versions | rss
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    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/cytochrome c6-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 or cytochrome c6.

    Catalytic activityi

    Reduced plastocyanin + oxidized ferredoxin + light = oxidized plastocyanin + reduced ferredoxin.UniRule annotation

    Cofactori

    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)LengthDescriptionGraphical viewFeature identifierActions
    Metal bindingi575 – 5751Iron-sulfur (4Fe-4S); shared with dimeric partnerUniRule annotation
    Metal bindingi584 – 5841Iron-sulfur (4Fe-4S); shared with dimeric partnerUniRule annotation
    Metal bindingi677 – 6771Magnesium (chlorophyll-a' A1 axial ligand; P700 special pair)UniRule annotation
    Metal bindingi685 – 6851Magnesium (chlorophyll-a A3 axial ligand)UniRule annotation
    Binding sitei693 – 6931Chlorophyll-a A3UniRule annotation
    Binding sitei694 – 6941Phylloquinone AUniRule annotation

    GO - Molecular functioni

    1. 4 iron, 4 sulfur cluster binding Source: UniProtKB-KW
    2. chlorophyll binding Source: UniProtKB-KW
    3. electron carrier activity Source: UniProtKB-HAMAP
    4. magnesium ion binding Source: UniProtKB-HAMAP
    5. oxidoreductase activity Source: UniProtKB-KW

    GO - Biological processi

    1. photosynthesis Source: UniProtKB-HAMAP
    2. protein-chromophore linkage Source: UniProtKB-KW

    Keywords - Molecular functioni

    Oxidoreductase

    Keywords - Biological processi

    Electron transport, Photosynthesis, Transport

    Keywords - Ligandi

    4Fe-4S, Chlorophyll, Chromophore, Iron, Iron-sulfur, Magnesium, Metal-binding

    Names & Taxonomyi

    Protein namesi
    Recommended name:
    Photosystem I P700 chlorophyll a apoprotein A1UniRule annotation (EC:1.97.1.12UniRule annotation)
    Alternative name(s):
    PSI-AUniRule annotation
    PsaAUniRule annotation
    Gene namesi
    Name:psaAUniRule annotation
    Encoded oniPlastid; Chloroplast
    OrganismiPhaeodactylum tricornutum (strain CCAP 1055/1)
    Taxonomic identifieri556484 [NCBI]
    Taxonomic lineageiEukaryotaStramenopilesBacillariophytaBacillariophyceaeBacillariophycidaeNaviculalesPhaeodactylaceaePhaeodactylum
    ProteomesiUP000000759: Chloroplast

    Subcellular locationi

    Plastidchloroplast thylakoid membrane UniRule annotation; Multi-pass membrane protein UniRule annotation

    GO - Cellular componenti

    1. chloroplast thylakoid membrane Source: UniProtKB-SubCell
    2. integral component of membrane Source: UniProtKB-KW
    3. photosystem I Source: UniProtKB-KW

    Keywords - Cellular componenti

    Chloroplast, Membrane, Photosystem I, Plastid, Thylakoid

    PTM / Processingi

    Molecule processing

    Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
    Chaini1 – 752752Photosystem I P700 chlorophyll a apoprotein A1PRO_0000275971Add
    BLAST

    Interactioni

    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

    Structurei

    3D structure databases

    ProteinModelPortaliA0T0L9.
    SMRiA0T0L9. Positions 14-751.
    ModBaseiSearch...
    MobiDBiSearch...

    Transmembrane

    Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
    Transmembranei73 – 9624Helical; Name=IUniRule annotationAdd
    BLAST
    Transmembranei159 – 18224Helical; Name=IIUniRule annotationAdd
    BLAST
    Transmembranei198 – 22225Helical; Name=IIIUniRule annotationAdd
    BLAST
    Transmembranei294 – 31219Helical; Name=IVUniRule annotationAdd
    BLAST
    Transmembranei349 – 37224Helical; Name=VUniRule annotationAdd
    BLAST
    Transmembranei388 – 41427Helical; Name=VIUniRule annotationAdd
    BLAST
    Transmembranei436 – 45823Helical; Name=VIIUniRule annotationAdd
    BLAST
    Transmembranei533 – 55119Helical; Name=VIIIUniRule annotationAdd
    BLAST
    Transmembranei591 – 61222Helical; Name=IXUniRule annotationAdd
    BLAST
    Transmembranei666 – 68823Helical; Name=XUniRule annotationAdd
    BLAST
    Transmembranei726 – 74621Helical; Name=XIUniRule annotationAdd
    BLAST

    Family & Domainsi

    Sequence similaritiesi

    Belongs to the PsaA/PsaB family.UniRule annotation

    Keywords - Domaini

    Transmembrane, Transmembrane helix

    Family and domain databases

    Gene3Di1.20.1130.10. 1 hit.
    HAMAPiMF_00458. PSI_PsaA.
    InterProiIPR006243. PSI_PsaA.
    IPR001280. PSI_PsaA/B.
    IPR020586. PSI_PsaA/B_CS.
    [Graphical view]
    PfamiPF00223. PsaA_PsaB. 1 hit.
    [Graphical view]
    PIRSFiPIRSF002905. PSI_A. 1 hit.
    PRINTSiPR00257. PHOTSYSPSAAB.
    SUPFAMiSSF81558. SSF81558. 1 hit.
    TIGRFAMsiTIGR01335. psaA. 1 hit.
    PROSITEiPS00419. PHOTOSYSTEM_I_PSAAB. 1 hit.
    [Graphical view]

    Sequencei

    Sequence statusi: Complete.

    A0T0L9-1 [UniParc]FASTAAdd to Basket

    « Hide

    MAISSTDRRS KNVQIFVEKD AVETSFAKWA QPGHFSRTLA KGPKTTTWIW    50
    NLHADAHDFD SQTSSLEEVS RKIFSAHFGQ LSVIFLWISG MHFHGAYFSN 100
    YSAWLTDPVN IKQSSQVVWP IVGQEILNGD VGGNFQGIQT TSGWFQMWRA 150
    EGITSEVELY WIAIGGLAMS AIMLFAGWFH YHKAAPKLEW FQNAESMMNH 200
    HLAGLLGLGC LSWSGHQIHV ALPINKLLDA GVAPQEIPLP HEFLINRELM 250
    SQLYPSFSKG LAPFFSGHWG EYSDFLTFKG GLNPVTGGLW LSDIAHHHLA 300
    LAVLFIFAGH MYRTNWGIGH SMKEILEAHK GPFTGEGHKG LYEILTTSWH 350
    AQLAINLAMM GSLSIIVAHH MYAMPPYPYI ATDYATQLSL FTHHMWIGGF 400
    CVTGGAAHAA IFMVRDYTPA NNYNNLLDRV LRHRDSIIAH LNWVCIFLGC 450
    HAFGFYIHND TMRALGRPQD MFSDKAIQLQ PIFAQWIQNI HLLAPGTTAP 500
    NALATTSYAF GGEVVEVGGK IAMMPIQLGT ADFMVHHIHA FTIHVTVLIL 550
    LKGVLYARSS KLIPDKANLG FRFPCDGPGR GGTCQSSSWD HVFLGLFWMY 600
    NSISVVIFHF SWKMQSDVWG TISPDGSISH ITGGNFAKGA ITINGWLRDF 650
    LWSQASQVIQ SYGSAASAYG LIFLGAHFIW AFSLMFLFSG RGYWQELIES 700
    IVWAHNKLNF APAIQPRALS ITQGRAVGLA HYLLGGIGTT WAFFLARAVS 750
    IS 752
    Length:752
    Mass (Da):83,596
    Last modified:January 9, 2007 - v1
    Checksum:iA2FEB64333F4C252
    GO

    Sequence databases

    Select the link destinations:
    EMBL
    GenBank
    DDBJ
    Links Updated
    EF067920 Genomic DNA. Translation: ABK20582.1.
    RefSeqiYP_874359.1. NC_008588.1.

    Genome annotation databases

    GeneIDi4524636.

    Cross-referencesi

    Sequence databases

    Select the link destinations:
    EMBL
    GenBank
    DDBJ
    Links Updated
    EF067920 Genomic DNA. Translation: ABK20582.1 .
    RefSeqi YP_874359.1. NC_008588.1.

    3D structure databases

    ProteinModelPortali A0T0L9.
    SMRi A0T0L9. Positions 14-751.
    ModBasei Search...
    MobiDBi Search...

    Protocols and materials databases

    Structural Biology Knowledgebase Search...

    Genome annotation databases

    GeneIDi 4524636.

    Family and domain databases

    Gene3Di 1.20.1130.10. 1 hit.
    HAMAPi MF_00458. PSI_PsaA.
    InterProi IPR006243. PSI_PsaA.
    IPR001280. PSI_PsaA/B.
    IPR020586. PSI_PsaA/B_CS.
    [Graphical view ]
    Pfami PF00223. PsaA_PsaB. 1 hit.
    [Graphical view ]
    PIRSFi PIRSF002905. PSI_A. 1 hit.
    PRINTSi PR00257. PHOTSYSPSAAB.
    SUPFAMi SSF81558. SSF81558. 1 hit.
    TIGRFAMsi TIGR01335. psaA. 1 hit.
    PROSITEi PS00419. PHOTOSYSTEM_I_PSAAB. 1 hit.
    [Graphical view ]
    ProtoNeti Search...

    Publicationsi

    1. "Chloroplast genomes of the diatoms Phaeodactylum tricornutum and Thalassiosira pseudonana: comparison with other plastid genomes of the red lineage."
      Oudot-Le Secq M.-P., Grimwood J., Shapiro H., Armbrust E.V., Bowler C., Green B.R.
      Mol. Genet. Genomics 277:427-439(2007) [PubMed] [Europe PMC] [Abstract]
      Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
      Strain: CCAP 1055/1.

    Entry informationi

    Entry nameiPSAA_PHATC
    AccessioniPrimary (citable) accession number: A0T0L9
    Entry historyi
    Integrated into UniProtKB/Swiss-Prot: February 6, 2007
    Last sequence update: January 9, 2007
    Last modified: October 1, 2014
    This is version 44 of the entry and version 1 of the sequence. [Complete history]
    Entry statusiReviewed (UniProtKB/Swiss-Prot)

    Miscellaneousi

    Keywords - Technical termi

    Complete proteome, Reference proteome

    Documents

    1. SIMILARITY comments
      Index of protein domains and families

    External Data

    Dasty 3