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A0ZZ34

- PSAB_GOSBA

UniProt

A0ZZ34 - PSAB_GOSBA

Protein

Photosystem I P700 chlorophyll a apoprotein A2

Gene

psaB

Organism
Gossypium barbadense (Sea-island cotton) (Egyptian cotton)
Status
Reviewed - Annotation score: 4 out of 5- Protein inferred from homologyi
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    • History
      Entry version 38 (01 Oct 2014)
      Sequence version 1 (23 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-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 annotation

    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 bindingi559 – 5591Iron-sulfur (4Fe-4S); shared with dimeric partnerUniRule annotation
    Metal bindingi568 – 5681Iron-sulfur (4Fe-4S); shared with dimeric partnerUniRule annotation
    Metal bindingi654 – 6541Magnesium (chlorophyll-a B1 axial ligand; P700 special pair)UniRule annotation
    Metal bindingi662 – 6621Magnesium (chlorophyll-a B3 axial ligand)UniRule annotation
    Binding sitei670 – 6701Chlorophyll-a B3UniRule annotation
    Binding sitei671 – 6711Phylloquinone 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

    Names & Taxonomyi

    Protein namesi
    Recommended name:
    Photosystem I P700 chlorophyll a apoprotein A2UniRule annotation (EC:1.97.1.12UniRule annotation)
    Alternative name(s):
    PSI-BUniRule annotation
    PsaBUniRule annotation
    Gene namesi
    Name:psaBUniRule annotation
    Encoded oniPlastid; Chloroplast
    OrganismiGossypium barbadense (Sea-island cotton) (Egyptian cotton)
    Taxonomic identifieri3634 [NCBI]
    Taxonomic lineageiEukaryotaViridiplantaeStreptophytaEmbryophytaTracheophytaSpermatophytaMagnoliophytaeudicotyledonsGunneridaePentapetalaerosidsmalvidsMalvalesMalvaceaeMalvoideaeGossypium

    Subcellular locationi

    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 – 734734Photosystem I P700 chlorophyll a apoprotein A2PRO_0000277115Add
    BLAST

    Proteomic databases

    PRIDEiA0ZZ34.

    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

    ProteinModelPortaliA0ZZ34.
    SMRiA0ZZ34. Positions 2-733.
    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
    Transmembranei330 – 35324Helical; Name=VUniRule annotationAdd
    BLAST
    Transmembranei369 – 39527Helical; Name=VIUniRule annotationAdd
    BLAST
    Transmembranei417 – 43923Helical; Name=VIIUniRule annotationAdd
    BLAST
    Transmembranei517 – 53519Helical; Name=VIIIUniRule annotationAdd
    BLAST
    Transmembranei575 – 59622Helical; Name=IXUniRule annotationAdd
    BLAST
    Transmembranei643 – 66523Helical; Name=XUniRule annotationAdd
    BLAST
    Transmembranei707 – 72721Helical; 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_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.

    A0ZZ34-1 [UniParc]FASTAAdd to Basket

    « Hide

    MALRFPRFSQ GLAQDPTTRR IWFGIATAHD FESHDDITEE RLYQNIFASH    50
    FGQLAIIFLW TSGNLFHVAW QGNFEAWVQD PLHVRPIAHA IWDPHFGQPA 100
    VEAFTRGGAP GPVNIAYSGV YQWWYTIGLR TNEDLYTGAL FLLFLSALSL 150
    IAGWLHLQPK WKPSVSWFKN AESRLNHHLS GLFGVSSLAW TGHLVHVAIP 200
    GSRGEYVRWN NFLDVLPHPQ GLGPFFSGQW NLYAQNPDSS SHLFGTSQGS 250
    GTAILTLLGG FHPQTQSLWL TDIAHHHLAI AILFLIAGHM YRTNFGIGHS 300
    IKDLLEAHIP PGGRLGRGHK GLYDTINNSI HFQLGLALAS LGVITSLVAQ 350
    HMYSLPAYAF IAQDFTTQAA LYTHHQYIAG FIMTGAFAHG AIFFIRDYNP 400
    EQNEDNVLAR MLDHKEAIIS HLSWASLFLG FHTLGLYVHN DVMLAFGTPE 450
    KQILIEPIFA QWIQSAHGKT SYGFDVLLSS TNGPAFNAGR SIWLPGWLNA 500
    VNENSNSLFL TIGPGDFLVH HAIALGLHTT TLILVKGALD ARGSKLMPDK 550
    KDFGYSFPCD GPGRGGTCDI SAWDAFYLAV FWMLNTIGWV TFYWHWKHIT 600
    LWQGNVSQFN ESSTYLMGWL RDYLWLNSSQ LINGYNPFGM NSLSVWAWMF 650
    LFGHLVWATG FMFLISWRGY WQELIETLAW AHERTPLANL IRWRDKPVAL 700
    SIVQARLVGL AHFSVGYIFT FAAFLIASTS GKFG 734
    Length:734
    Mass (Da):82,388
    Last modified:January 23, 2007 - v1
    Checksum:i82BEC221B89E9812
    GO

    Sequence databases

    Select the link destinations:
    EMBL
    GenBank
    DDBJ
    Links Updated
    AP009123 Genomic DNA. Translation: BAF41246.1.
    RefSeqiYP_913186.1. NC_008641.1.

    Genome annotation databases

    GeneIDi4575212.

    Cross-referencesi

    Sequence databases

    Select the link destinations:
    EMBL
    GenBank
    DDBJ
    Links Updated
    AP009123 Genomic DNA. Translation: BAF41246.1 .
    RefSeqi YP_913186.1. NC_008641.1.

    3D structure databases

    ProteinModelPortali A0ZZ34.
    SMRi A0ZZ34. Positions 2-733.
    ModBasei Search...
    MobiDBi Search...

    Proteomic databases

    PRIDEi A0ZZ34.

    Protocols and materials databases

    Structural Biology Knowledgebase Search...

    Genome annotation databases

    GeneIDi 4575212.

    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. "Complete nucleotide sequence of the cotton (Gossypium barbadense L.) chloroplast genome with a comparative analysis of sequences among 9 dicot plants."
      Ibrahim R.I.H., Azuma J., Sakamoto M.
      Genes Genet. Syst. 81:311-321(2006) [PubMed] [Europe PMC] [Abstract]
      Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].

    Entry informationi

    Entry nameiPSAB_GOSBA
    AccessioniPrimary (citable) accession number: A0ZZ34
    Entry historyi
    Integrated into UniProtKB/Swiss-Prot: February 6, 2007
    Last sequence update: January 23, 2007
    Last modified: October 1, 2014
    This is version 38 of the entry and version 1 of the sequence. [Complete history]
    Entry statusiReviewed (UniProtKB/Swiss-Prot)
    Annotation programPlant Protein Annotation Program

    Miscellaneousi

    Documents

    1. SIMILARITY comments
      Index of protein domains and families

    External Data

    Dasty 3