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A2BYP8

- PSAB_PROM5

UniProt

A2BYP8 - PSAB_PROM5

Protein

Photosystem I P700 chlorophyll a apoprotein A2

Gene

psaB

Organism
Prochlorococcus marinus (strain MIT 9515)
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 bindingi567 – 5671Iron-sulfur (4Fe-4S); shared with dimeric partnerUniRule annotation
    Metal bindingi576 – 5761Iron-sulfur (4Fe-4S); shared with dimeric partnerUniRule annotation
    Metal bindingi662 – 6621Magnesium (divinyl chlorophyll-a B1 axial ligand; P700 special pair)UniRule annotation
    Metal bindingi670 – 6701Magnesium (divinyl chlorophyll-a B3 axial ligand)UniRule annotation
    Binding sitei678 – 6781Divinyl chlorophyll-a B3UniRule annotation
    Binding sitei679 – 6791Phylloquinone BUniRule 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

    BioCyciPMAR167542:GI3N-1750-MONOMER.

    Names & Taxonomyi

    Protein namesi
    Recommended name:
    Photosystem I P700 chlorophyll a apoprotein A2UniRule annotation (EC:1.97.1.12UniRule annotation)
    Alternative name(s):
    PsaBUniRule annotation
    Gene namesi
    Name:psaBUniRule annotation
    Ordered Locus Names:P9515_17021
    OrganismiProchlorococcus marinus (strain MIT 9515)
    Taxonomic identifieri167542 [NCBI]
    Taxonomic lineageiBacteriaCyanobacteriaProchloralesProchlorococcaceaeProchlorococcus
    ProteomesiUP000001589: 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 – 742742Photosystem I P700 chlorophyll a apoprotein A2PRO_0000300020Add
    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

    STRINGi167542.P9515_17021.

    Structurei

    3D structure databases

    ProteinModelPortaliA2BYP8.
    SMRiA2BYP8. Positions 2-741.
    ModBaseiSearch...
    MobiDBiSearch...

    Transmembrane

    Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
    Transmembranei46 – 6924Helical; Name=IUniRule annotationAdd
    BLAST
    Transmembranei135 – 15824Helical; Name=IIUniRule annotationAdd
    BLAST
    Transmembranei175 – 19925Helical; Name=IIIUniRule annotationAdd
    BLAST
    Transmembranei273 – 29119Helical; Name=IVUniRule annotationAdd
    BLAST
    Transmembranei336 – 35924Helical; Name=VUniRule annotationAdd
    BLAST
    Transmembranei375 – 40127Helical; Name=VIUniRule annotationAdd
    BLAST
    Transmembranei423 – 44523Helical; Name=VIIUniRule annotationAdd
    BLAST
    Transmembranei525 – 54319Helical; Name=VIIIUniRule annotationAdd
    BLAST
    Transmembranei583 – 60422Helical; Name=IXUniRule annotationAdd
    BLAST
    Transmembranei651 – 67323Helical; Name=XUniRule annotationAdd
    BLAST
    Transmembranei715 – 73521Helical; Name=XIUniRule annotationAdd
    BLAST

    Family & Domainsi

    Sequence similaritiesi

    Belongs to the PsaA/PsaB family.UniRule annotation

    Keywords - Domaini

    Transmembrane, Transmembrane helix

    Phylogenomic databases

    eggNOGiNOG04867.
    HOGENOMiHOG000276868.
    KOiK02690.
    OMAiAQFNESS.
    OrthoDBiEOG60W7PS.

    Family and domain databases

    Gene3Di1.20.1130.10. 1 hit.
    HAMAPiMF_00482. PSI_PsaB.
    InterProiIPR001280. PSI_PsaA/B.
    IPR020586. PSI_PsaA/B_CS.
    IPR006244. PSI_PsaB.
    [Graphical view]
    PfamiPF00223. PsaA_PsaB. 1 hit.
    [Graphical view]
    PIRSFiPIRSF002905. PSI_A. 1 hit.
    PRINTSiPR00257. PHOTSYSPSAAB.
    SUPFAMiSSF81558. SSF81558. 1 hit.
    TIGRFAMsiTIGR01336. psaB. 1 hit.
    PROSITEiPS00419. PHOTOSYSTEM_I_PSAAB. 1 hit.
    [Graphical view]

    Sequencei

    Sequence statusi: Complete.

    A2BYP8-1 [UniParc]FASTAAdd to Basket

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    MATKFPAFNQ GLAQDPTTRR IWYGIATAHD FESHDGMTEE KLYQKLFSTH    50
    FGHLAIIALW VAGNLFHIAW QGNFEQFVLD PTHVRPIAHA IWDPHFGSGI 100
    TEAMTQAGAD GPVNIAYSGL YHWWYTIGMR TNEQLFQASI FMSILACWTL 150
    FAGWLHLQPK FRPSLAWFKN NESRLNHHLA VLFGFSSIAW TGHLVHVAIP 200
    ESRGIHVGWD NWLTVLPHPA GLTPFFTLNW GAYAQNPDSL EQVFGTAEGA 250
    GTAIFTFLGG LHPQSEALWL TDIAHHHIAI GTVFIIAGHM YRNTFGIGHS 300
    LKEITEAHNT RHPLDPHKGS FGINHDGLYE TVTNSLHFQL GLALAALGVA 350
    TSLVAQHMGA LPSYAFIARD YTTQSALYTH HQYIAMFLMV GAFAHGAIFF 400
    VRDYDPELNK DNVLARVLGT KEALISHLSW VTMILGFHTL GIYVHNDVVV 450
    AFGNPEKQIL IEPVFAQFVQ AAQGKMMYGF NALLSDPTSA ASVAANSLPG 500
    NHYWMDLINR QDALSAFLPI GPADFLVHHA IALGLHTTAL ILIKGALDAR 550
    GTKLIPDKKD LGYAFPCDGP GRGGTCDSSS WDAMYLAMFW ALNLIAWVTF 600
    YWHWKHLAIW QGNVAQFNES GTYLMGWFRD YLWLNSAQLI NGYNPFGVNS 650
    LSVWAWMFLF GHLVWATGFM FLISWRGYWQ ELIETLVWAH QRTPIANLVG 700
    WRDKPVALSI VQARLVGLAH FTIGNILTFG AFVIASTSGK FG 742
    Length:742
    Mass (Da):82,725
    Last modified:February 20, 2007 - v1
    Checksum:iAE4A8A399874CA7C
    GO

    Sequence databases

    Select the link destinations:
    EMBL
    GenBank
    DDBJ
    Links Updated
    CP000552 Genomic DNA. Translation: ABM72909.1.
    RefSeqiWP_011821001.1. NC_008817.1.
    YP_001012016.1. NC_008817.1.

    Genome annotation databases

    EnsemblBacteriaiABM72909; ABM72909; P9515_17021.
    GeneIDi4720211.
    KEGGipmc:P9515_17021.
    PATRICi23017076. VBIProMar113831_1750.

    Cross-referencesi

    Sequence databases

    Select the link destinations:
    EMBL
    GenBank
    DDBJ
    Links Updated
    CP000552 Genomic DNA. Translation: ABM72909.1 .
    RefSeqi WP_011821001.1. NC_008817.1.
    YP_001012016.1. NC_008817.1.

    3D structure databases

    ProteinModelPortali A2BYP8.
    SMRi A2BYP8. Positions 2-741.
    ModBasei Search...
    MobiDBi Search...

    Protein-protein interaction databases

    STRINGi 167542.P9515_17021.

    Protocols and materials databases

    Structural Biology Knowledgebase Search...

    Genome annotation databases

    EnsemblBacteriai ABM72909 ; ABM72909 ; P9515_17021 .
    GeneIDi 4720211.
    KEGGi pmc:P9515_17021.
    PATRICi 23017076. VBIProMar113831_1750.

    Phylogenomic databases

    eggNOGi NOG04867.
    HOGENOMi HOG000276868.
    KOi K02690.
    OMAi AQFNESS.
    OrthoDBi EOG60W7PS.

    Enzyme and pathway databases

    BioCyci PMAR167542:GI3N-1750-MONOMER.

    Family and domain databases

    Gene3Di 1.20.1130.10. 1 hit.
    HAMAPi MF_00482. PSI_PsaB.
    InterProi IPR001280. PSI_PsaA/B.
    IPR020586. PSI_PsaA/B_CS.
    IPR006244. PSI_PsaB.
    [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 TIGR01336. psaB. 1 hit.
    PROSITEi PS00419. PHOTOSYSTEM_I_PSAAB. 1 hit.
    [Graphical view ]
    ProtoNeti Search...

    Publicationsi

    1. Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
      Strain: MIT 9515.

    Entry informationi

    Entry nameiPSAB_PROM5
    AccessioniPrimary (citable) accession number: A2BYP8
    Entry historyi
    Integrated into UniProtKB/Swiss-Prot: September 11, 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