Skip Header

You are using a version of browser that may not display all the features of this website. Please consider upgrading your browser.
Basket 0
(max 400 entries)x

Your basket is currently empty.

Select item(s) and click on "Add to basket" to create your own collection here
(400 entries max)

A2CC72

- PSAB_PROM3

UniProt

A2CC72 - PSAB_PROM3

Protein

Photosystem I P700 chlorophyll a apoprotein A2

Gene

psaB

Organism
Prochlorococcus marinus (strain MIT 9303)
Status
Reviewed - Annotation score: 3 out of 5- Protein inferred from homologyi
    • BLAST
    • Align
    • Format
    • Add to basket
    • History
      Entry version 56 (01 Oct 2014)
      Sequence version 1 (20 Feb 2007)
      Previous versions | rss
    • Help video
    • Feedback
    • Comment

    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 bindingi574 – 5741Iron-sulfur (4Fe-4S); shared with dimeric partnerUniRule annotation
    Metal bindingi583 – 5831Iron-sulfur (4Fe-4S); shared with dimeric partnerUniRule annotation
    Metal bindingi669 – 6691Magnesium (divinyl chlorophyll-a B1 axial ligand; P700 special pair)UniRule annotation
    Metal bindingi677 – 6771Magnesium (divinyl chlorophyll-a B3 axial ligand)UniRule annotation
    Binding sitei685 – 6851Divinyl chlorophyll-a B3UniRule annotation
    Binding sitei686 – 6861Phylloquinone 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

    BioCyciPMAR59922:GH54-2455-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:P9303_23471
    OrganismiProchlorococcus marinus (strain MIT 9303)
    Taxonomic identifieri59922 [NCBI]
    Taxonomic lineageiBacteriaCyanobacteriaProchloralesProchlorococcaceaeProchlorococcus
    ProteomesiUP000002274: 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 – 749749Photosystem I P700 chlorophyll a apoprotein A2PRO_0000300018Add
    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

    STRINGi59922.P9303_23471.

    Structurei

    3D structure databases

    ProteinModelPortaliA2CC72.
    SMRiA2CC72. Positions 2-748.
    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
    Transmembranei343 – 36624Helical; Name=VUniRule annotationAdd
    BLAST
    Transmembranei382 – 40827Helical; Name=VIUniRule annotationAdd
    BLAST
    Transmembranei430 – 45223Helical; Name=VIIUniRule annotationAdd
    BLAST
    Transmembranei532 – 55019Helical; Name=VIIIUniRule annotationAdd
    BLAST
    Transmembranei590 – 61122Helical; Name=IXUniRule annotationAdd
    BLAST
    Transmembranei658 – 68023Helical; Name=XUniRule annotationAdd
    BLAST
    Transmembranei722 – 74221Helical; 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.

    A2CC72-1 [UniParc]FASTAAdd to Basket

    « Hide

    MATKFPSFSQ GLAQDPTTRR IWYGIATAHD FESHDGMTEE RLYQKLFSTH    50
    FGHLAVIGLW VAGNLFHIAW QGNFEQWVAD PQNVQPIAHA IWDPHFGQGI 100
    SDALTQAGAS RPVNICYSGL YHWWYTIGMR TNTELYQGAI FIDILVAWLL 150
    FGGWLHLQPK FRPSLAWFKN AEAMMNHHLA VLFGFTNIAW TGHLVHVAIP 200
    ESRGQHVGWD NFLTVLPHPE GLTPFFTGNW GAYAQNPDSL NHAFGTSEGA 250
    GTAILTFLGG VHPQSGALWL TDISHHHIAI GVFMIIGGHM YRNSFGIGHT 300
    FKEITDGHNT SHPNDPHKDG FREKIGHYGL SHTGITDTIN NSLHFQLGLA 350
    LACLGTAASL VAHHMGALPS YAFIAQDYTT QAALYTHHQY IAIFLMCGAF 400
    SHGAIFFVRD YDPEANKDNV LARVLETKEA LISHLSWVCM LLGFHTLALY 450
    LHNDVVIAFG TPEKQILVEP IFAQFIQAAS GKVMYGLDVL LANANSAPSL 500
    AAAGMPGDHY WMDLINASPE VSNFMPIGPG DFLVHHGIAL GLHTTALILI 550
    KGALDARGSK LMPDKKDFGY AFACDGPGRG GTCDISAWDS TYMAIFWALN 600
    TIAWATYYWH WKHLAAWQGN MAQFNESSTH LMGWFRDYLW INSSQIINGY 650
    NPFGINNLSP WAYMFLAGHL VWATGFMFLI SWRGYWQELI ETLVWAHQRS 700
    PIANLVGWRD KPVALSIVQA RLVGVTHFAV GNIFTFGAFV IASTASKFG 749
    Length:749
    Mass (Da):83,151
    Last modified:February 20, 2007 - v1
    Checksum:i6C0AE61033501E0C
    GO

    Sequence databases

    Select the link destinations:
    EMBL
    GenBank
    DDBJ
    Links Updated
    CP000554 Genomic DNA. Translation: ABM79082.1.
    RefSeqiYP_001018347.1. NC_008820.1.

    Genome annotation databases

    EnsemblBacteriaiABM79082; ABM79082; P9303_23471.
    GeneIDi4778124.
    KEGGipmf:P9303_23471.
    PATRICi23002255. VBIProMar17757_2418.

    Cross-referencesi

    Sequence databases

    Select the link destinations:
    EMBL
    GenBank
    DDBJ
    Links Updated
    CP000554 Genomic DNA. Translation: ABM79082.1 .
    RefSeqi YP_001018347.1. NC_008820.1.

    3D structure databases

    ProteinModelPortali A2CC72.
    SMRi A2CC72. Positions 2-748.
    ModBasei Search...
    MobiDBi Search...

    Protein-protein interaction databases

    STRINGi 59922.P9303_23471.

    Protocols and materials databases

    Structural Biology Knowledgebase Search...

    Genome annotation databases

    EnsemblBacteriai ABM79082 ; ABM79082 ; P9303_23471 .
    GeneIDi 4778124.
    KEGGi pmf:P9303_23471.
    PATRICi 23002255. VBIProMar17757_2418.

    Phylogenomic databases

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

    Enzyme and pathway databases

    BioCyci PMAR59922:GH54-2455-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 9303.

    Entry informationi

    Entry nameiPSAB_PROM3
    AccessioniPrimary (citable) accession number: A2CC72
    Entry historyi
    Integrated into UniProtKB/Swiss-Prot: September 11, 2007
    Last sequence update: February 20, 2007
    Last modified: October 1, 2014
    This is version 56 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