A0A1J0PKF8 · A0A1J0PKF8_PINMU

  • Protein
    Photosystem I P700 chlorophyll a apoprotein A1
  • Gene
    psaA
  • Status
    UniProtKB unreviewed (TrEMBL)
  • Amino acids
  • Protein existence
    Inferred from homology
  • Annotation score
    3/5

Function

function

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.

Catalytic activity

Features

Showing features for binding site.

1754100200300400500600700
TypeIDPosition(s)Description
Binding site577[4Fe-4S] cluster (UniProtKB | ChEBI); ligand shared between dimeric partners
Binding site586[4Fe-4S] cluster (UniProtKB | ChEBI); ligand shared between dimeric partners
Binding site679Mg (UniProtKB | ChEBI) of chlorophyll a' A1 (UniProtKB | ChEBI); axial binding residue
Binding site687Mg (UniProtKB | ChEBI) of chlorophyll a A3 (UniProtKB | ChEBI); axial binding residue
Binding site695chlorophyll a A3 (UniProtKB | ChEBI)
Binding site696phylloquinone A (UniProtKB | ChEBI)

GO annotations

all annotationsall molecular functionnucleotide bindingmolecular_functionnucleic acid bindingdna bindingchromatin bindingdna-binding transcription factor activityrna bindingcytoskeletal motor activitycatalytic activitynuclease activitysignaling receptor bindingstructural molecule activitytransporter activitybindingprotein bindingtranslation factor activity, rna bindinglipid bindingkinase activitytransferase activityhydrolase activityoxygen bindingenzyme regulator activitycarbohydrate bindingsignaling receptor activitytranslation regulator activitytranscription regulator activityother molecular functionall biological processcarbohydrate metabolic processgeneration of precursor metabolites and energynucleobase-containing compound metabolic processdna metabolic processtranslationlipid metabolic processtransportresponse to stresscell cyclecell communicationsignal transductioncell-cell signalingmulticellular organism developmentcircadian rhythmbiological_processmetabolic processcatabolic processbiosynthetic processresponse to light stimulusresponse to external stimulustropismresponse to biotic stimulusresponse to abiotic stimulusresponse to endogenous stimulusembryo developmentpost-embryonic developmentfruit ripeningabscissionpollinationflower developmentcellular processprogrammed cell deathphotosynthesiscellular component organizationcell growthprotein metabolic processcellular homeostasissecondary metabolic processreproductive processcell differentiationprotein modification processgrowthepigenetic regulation of gene expressionresponse to chemicalanatomical structure developmentregulation of molecular functionother biological processall cellular componentcellular_componentextracellular regioncell wallintracellular anatomical structurenucleusnuclear envelopenucleoplasmnucleoluscytoplasmmitochondrionlysosomeendosomevacuoleperoxisomeendoplasmic reticulumgolgi apparatuscytosolribosomecytoskeletonplasma membranechloroplastplastidthylakoidmembraneexternal encapsulating structureother cellular component
Cell color indicative of number of GO terms
AspectTerm
Cellular Componentchloroplast thylakoid membrane
Cellular Componentphotosystem I
Molecular Function4 iron, 4 sulfur cluster binding
Molecular Functionchlorophyll binding
Molecular Functionelectron transfer activity
Molecular Functionmagnesium ion binding
Molecular Functionoxidoreductase activity
Biological Processphotosynthesis

Keywords

Enzyme and pathway databases

Names & Taxonomy

Protein names

  • Recommended name
    Photosystem I P700 chlorophyll a apoprotein A1
  • EC number
  • Alternative names
    • PSI-A
    • PsaA

Gene names

    • Name
      psaA

Encoded on

  • Chloroplast

Organism names

  • Taxonomic identifier
  • Strain
    • B37
  • Taxonomic lineage
    Eukaryota > Viridiplantae > Streptophyta > Embryophyta > Tracheophyta > Spermatophyta > Pinopsida > Pinidae > Conifers I > Pinales > Pinaceae > Pinus > Pinus subgen. Pinus

Accessions

  • Primary accession
    A0A1J0PKF8

Subcellular Location

Membrane
; Multi-pass membrane protein
Plastid, chloroplast thylakoid membrane
; Multi-pass membrane protein

Features

Showing features for transmembrane.

TypeIDPosition(s)Description
Transmembrane75-94Helical
Transmembrane160-182Helical
Transmembrane354-374Helical
Transmembrane394-416Helical
Transmembrane437-458Helical
Transmembrane535-553Helical
Transmembrane594-614Helical
Transmembrane668-690Helical
Transmembrane731-752Helical

Keywords

Interaction

Subunit

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.

Family & Domains

Sequence similarities

Belongs to the PsaA/PsaB family.

Keywords

Family and domain databases

Sequence

  • Sequence status
    Complete
  • Length
    754
  • Mass (Da)
    83,816
  • Last updated
    2017-02-15 v1
  • Checksum
    E7B08C760B4345D9
MNFFRPQETEVKKVKVVVDIDPVKTSFEKWAKPGHFSRTLAKGPDTTTWIWNLHADAHDFDSHTNNLEDISRKVFSAHFGQLAIIFIWLSGMYYHGARFSNYEAWLADPTHIKPSAQIVWPIVGQEILNGDVGGGFRGIQITSGFFQIWRASGITSELQLYCTAIGALIFAALMLFAGWFHYHKAAPKLVWFQEVESMLNHHLAGLLGLGSLSWAGHQIHVSLPINQLLDAGVDPKEIPLPHEFIFNRDLLAELYPSFAKGVTPFLTLNWSEYSDFLTFRGGLNPVTGGLWLTDTAHHHLAIAVLFLIAGHMYKTNWRIGHNLKDLLEAHKGPFTGEGHKGLYEILTTSWHAQLAVNLAMLGSLTIVVAHHMYSMPPYPYLATDYGTQLSLFTHHMWIGGFIIVGAAAHAAIFMVRDYDPTTQYNNLLDRVLRHRDAIVSHLNWVCIFLGFHSFGLYIHNDTMSALGRPQDMFSDTAIQLQPIFAQWIQNTHASAPGSTAPGATASTSLTWGGGDLVTVGSKVALLPIPLGTADFLVHHIHAFTIHVTVLILLKGVLFARSSRLIPDKANLGFRFPCDGPGRGGTCQVSAWDHVFLGLFWMYNAISVVIFHFSWKMQSDVWGNISDQGVVTHITGGNFAQSSITINGWLRDFLWAQASQVIQSYGSSLSAYGLLFLGAHFVWAFSLMFLFSGRGYWQELIESIVWAHNKLKVAPAIQPRALSIVQGRAVGVAHYLLGGIVTTWAFFLARIIAIG

Sequence databases

Nucleotide SequenceProtein SequenceMolecule TypeStatus
KX833097
EMBL· GenBank· DDBJ
APD52011.1
EMBL· GenBank· DDBJ
Genomic DNA
MZ333465
EMBL· GenBank· DDBJ
QXJ42517.1
EMBL· GenBank· DDBJ
Genomic DNA

Similar Proteins

Disclaimer

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