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A2C4V3

- PSAA_PROM1

UniProt

A2C4V3 - PSAA_PROM1

Protein

Photosystem I P700 chlorophyll a apoprotein A1

Gene

psaA

Organism
Prochlorococcus marinus (strain NATL1A)
Status
Reviewed - Annotation score: 3 out of 5- Protein inferred from homologyi
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    • History
      Entry version 58 (01 Oct 2014)
      Sequence version 1 (20 Feb 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.UniRule annotation

    Catalytic activityi

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

    Cofactori

    PSI electron transfer chain: 5 divinyl chlorophyll a, 1 divinyl chlorophyll a', 2 phylloquinones and 3 4Fe-4S clusters. PSI core antenna: 90 divinyl chlorophyll a, 22 carotenoids, 3 phospholipids and 1 galactolipid. P700 is a divinyl chlorophyll a/divinyl chlorophyll a' dimer, A0 is one or more divinyl 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 bindingi601 – 6011Iron-sulfur (4Fe-4S); shared with dimeric partnerUniRule annotation
    Metal bindingi610 – 6101Iron-sulfur (4Fe-4S); shared with dimeric partnerUniRule annotation
    Metal bindingi693 – 6931Magnesium (divinyl chlorophyll-a' A1 axial ligand; P700 special pair)UniRule annotation
    Metal bindingi701 – 7011Magnesium (divinyl chlorophyll-a A3 axial ligand)UniRule annotation
    Binding sitei709 – 7091Divinyl chlorophyll-a A3UniRule annotation
    Binding sitei710 – 7101Phylloquinone 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

    Enzyme and pathway databases

    BioCyciPMAR167555:GI3K-1998-MONOMER.

    Names & Taxonomyi

    Protein namesi
    Recommended name:
    Photosystem I P700 chlorophyll a apoprotein A1UniRule annotation (EC:1.97.1.12UniRule annotation)
    Alternative name(s):
    PsaAUniRule annotation
    Gene namesi
    Name:psaAUniRule annotation
    Ordered Locus Names:NATL1_19571
    OrganismiProchlorococcus marinus (strain NATL1A)
    Taxonomic identifieri167555 [NCBI]
    Taxonomic lineageiBacteriaCyanobacteriaProchloralesProchlorococcaceaeProchlorococcus
    ProteomesiUP000002592: Chromosome

    Subcellular locationi

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

    GO - Cellular componenti

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

    Keywords - Cellular componenti

    Membrane, Photosystem I, Thylakoid

    PTM / Processingi

    Molecule processing

    Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
    Chaini1 – 768768Photosystem I P700 chlorophyll a apoprotein A1PRO_0000294204Add
    BLAST

    Interactioni

    Subunit structurei

    The PsaA/B heterodimer binds the P700 divinyl 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 cyanobacterial PSI reaction center is composed of one copy each of PsaA,B,C,D,E,F,I,J,K,L,M and X, and forms trimeric complexes.UniRule annotation

    Protein-protein interaction databases

    STRINGi167555.NATL1_19571.

    Structurei

    3D structure databases

    ProteinModelPortaliA2C4V3.
    SMRiA2C4V3. Positions 20-768.
    ModBaseiSearch...
    MobiDBiSearch...

    Transmembrane

    Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
    Transmembranei76 – 9924Helical; Name=IUniRule annotationAdd
    BLAST
    Transmembranei162 – 18524Helical; Name=IIUniRule annotationAdd
    BLAST
    Transmembranei201 – 22525Helical; Name=IIIUniRule annotationAdd
    BLAST
    Transmembranei310 – 32819Helical; Name=IVUniRule annotationAdd
    BLAST
    Transmembranei369 – 39224Helical; Name=VUniRule annotationAdd
    BLAST
    Transmembranei408 – 43427Helical; Name=VIUniRule annotationAdd
    BLAST
    Transmembranei456 – 47823Helical; Name=VIIUniRule annotationAdd
    BLAST
    Transmembranei559 – 57719Helical; Name=VIIIUniRule annotationAdd
    BLAST
    Transmembranei617 – 63822Helical; Name=IXUniRule annotationAdd
    BLAST
    Transmembranei682 – 70423Helical; Name=XUniRule annotationAdd
    BLAST
    Transmembranei742 – 76221Helical; Name=XIUniRule annotationAdd
    BLAST

    Family & Domainsi

    Sequence similaritiesi

    Belongs to the PsaA/PsaB family.UniRule annotation

    Keywords - Domaini

    Transmembrane, Transmembrane helix

    Phylogenomic databases

    eggNOGiNOG05023.
    HOGENOMiHOG000276868.
    KOiK02689.
    OMAiTWAFFHA.
    OrthoDBiEOG60W7PS.

    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.

    A2C4V3-1 [UniParc]FASTAAdd to Basket

    « Hide

    MTISPPEKEQ KKEPVLDKPI ETDAIPVDFS KLDKPGFWSK SLAKGPKTTT    50
    WIWNLHADAH DFDTHVGDLQ ETSRKVFSAH FGHLAVIFIW MSAAFFHGAR 100
    FSNYSGWLSD PTHVKPGAQV VWPIVGQEML NADLGGNYHG IQITSGIFQM 150
    WRGWGITNET ELMALAIGAL LMAAIMLHGG IYHYHKAAPK LDWFRNLESM 200
    LNHHIAGLVG LGSIAWAGHC IHIGAPTAAL MDAIDAGKPL IIDGIPIASI 250
    ADMPLPHELC NPAIASQIFP GLAGRTVENF FTTNWWAFSD FLTFKGGLNP 300
    VTGSLWMTDI SHHHLAFGVL AVLGGHLYRT MFGIGHSLKE ILDNHAGDPI 350
    LFPAPNGHKG IYEFLANSWH AQLGLNLAMI GSLSIIISHH MYAMPPYPYL 400
    SIDYPTVLGL FTHHMWIGGL FIVGAAAHAG IAMIRDYDPA VHIDNVLDRI 450
    LKARDALISH LNWACMFLGF HSFGLYIHND VMRALGRPAD MFSDTGIQLQ 500
    PVFAQWIQNI HNSAAGSTTL AGANVNLQPG LVSEVFNGSV SQVGGKIGIA 550
    PIPLGTADFM IHHIHAFTIH VTLLILLKGV LFARSSRLIP DKANLGFRFP 600
    CDGPGRGGTC QVSSWDHVFL GLFWMYNGLS VVIFHFSWKM QSDVWGLTGG 650
    NFAQSSITIN GWLRDFLWAQ SSQVLTSYGQ PISMYGLMFL GAHFVWAFSL 700
    MFLFSGRGYW QELFESIIWA HNKLNLAPTI QPRALSITQG RAVGAAHFLL 750
    GGIATTWAFF HARLIGLG 768
    Length:768
    Mass (Da):84,390
    Last modified:February 20, 2007 - v1
    Checksum:i5F51B544D4E4471E
    GO

    Sequence databases

    Select the link destinations:
    EMBL
    GenBank
    DDBJ
    Links Updated
    CP000553 Genomic DNA. Translation: ABM76513.1.
    RefSeqiWP_011824482.1. NC_008819.1.
    YP_001015777.1. NC_008819.1.

    Genome annotation databases

    EnsemblBacteriaiABM76513; ABM76513; NATL1_19571.
    GeneIDi4779260.
    KEGGipme:NATL1_19571.
    PATRICi23021569. VBIProMar31285_1998.

    Cross-referencesi

    Sequence databases

    Select the link destinations:
    EMBL
    GenBank
    DDBJ
    Links Updated
    CP000553 Genomic DNA. Translation: ABM76513.1 .
    RefSeqi WP_011824482.1. NC_008819.1.
    YP_001015777.1. NC_008819.1.

    3D structure databases

    ProteinModelPortali A2C4V3.
    SMRi A2C4V3. Positions 20-768.
    ModBasei Search...
    MobiDBi Search...

    Protein-protein interaction databases

    STRINGi 167555.NATL1_19571.

    Protocols and materials databases

    Structural Biology Knowledgebase Search...

    Genome annotation databases

    EnsemblBacteriai ABM76513 ; ABM76513 ; NATL1_19571 .
    GeneIDi 4779260.
    KEGGi pme:NATL1_19571.
    PATRICi 23021569. VBIProMar31285_1998.

    Phylogenomic databases

    eggNOGi NOG05023.
    HOGENOMi HOG000276868.
    KOi K02689.
    OMAi TWAFFHA.
    OrthoDBi EOG60W7PS.

    Enzyme and pathway databases

    BioCyci PMAR167555:GI3K-1998-MONOMER.

    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. Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
      Strain: NATL1A.

    Entry informationi

    Entry nameiPSAA_PROM1
    AccessioniPrimary (citable) accession number: A2C4V3
    Entry historyi
    Integrated into UniProtKB/Swiss-Prot: July 10, 2007
    Last sequence update: February 20, 2007
    Last modified: October 1, 2014
    This is version 58 of the entry and version 1 of the sequence. [Complete history]
    Entry statusiReviewed (UniProtKB/Swiss-Prot)
    Annotation programProkaryotic Protein Annotation Program

    Miscellaneousi

    Keywords - Technical termi

    Complete proteome

    Documents

    1. SIMILARITY comments
      Index of protein domains and families

    External Data

    Dasty 3