A0A1Z1G5L3 · A0A1Z1G5L3_ANEPI

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

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 Componentmitochondrion
Cellular Componentphotosystem I
Molecular Function4 iron, 4 sulfur cluster binding
Molecular Functionchlorophyll binding
Molecular Functionmetal ion binding
Molecular Functionoxidoreductase activity
Biological Processphotosynthesis

Keywords

Enzyme and pathway databases

Names & Taxonomy

Protein names

  • Recommended name
    photosystem I
  • EC number

Gene names

    • Name
      psaB

Encoded on

  • Mitochondrion

Organism names

Accessions

  • Primary accession
    A0A1Z1G5L3

Subcellular Location

Membrane
; Multi-pass membrane protein

Features

Showing features for transmembrane.

TypeIDPosition(s)Description
Transmembrane135-157Helical
Transmembrane178-199Helical
Transmembrane334-355Helical
Transmembrane375-396Helical
Transmembrane417-438Helical
Transmembrane517-539Helical
Transmembrane575-596Helical
Transmembrane645-665Helical
Transmembrane707-727Helical

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
    734
  • Mass (Da)
    82,617
  • Last updated
    2017-09-27 v1
  • Checksum
    67CD1B11CCC61556
MASRFPRFSQGLSQDPTTRRIWFGIATAHDFESHDDMTEERLYQKVFASHFGQLAIIFLWTSGNLFHVAWQGNFEIWVQDPLHVRPIAHAIWDPHFGQPAVEAFTRGGASGPVNIAYSGVYQWWYTIGLRTNQDLYNGALFLVFLSSLCLLAGWLHLQPKWEPRVSWFKNAESRLNHHLAGLFGVSSLAWTGHLVHIAIPESRGGHVRWNNFLTALPHPQGLGPFFTGQWNIYAQNVDSSDHFFGTSRGAGTAILTFIGGFHPQTQSLWLTDMAHHHLAIAVIFIIAGHMYRTNFGIGHSIKEILETHTPPGGRLGRGHKGLYDTINNSLHFQLGLALASLGVITSLVAQHMYSLPPYAFLAQDFTTQAALYTHHQYIAGFIMTGAFAHGAIFFIRDYDPERNRDNVLARMLEHKEAIISHLSWASLFLGFHTLGLYVHNDAMLAFGTPEKQILIEPVFAQWIQSTHGKAFYGFDVLLSSPSSPASNAGQSIWLPGWLDAINDSSNSLFLTIGPGDFLVHHAIALGLHTTTLILVKGALDARGSKLMPDKKEFGYSFPCDGPGRGGTCDISAWDAFYLAVFWMLNTIGWVTFYWHWKHITLWQGNVAQFNESSTYLMGWLRDYLWLNSSQLINGYNPFGMNSLSVWAWMFLFGHLVWATGFMFLISWRGYWQELIETLAWAHERTPLANLVRWKDKPVALSIVQARLVGLAHFSVGYIFTYAAFLIASTSGRFG

Sequence databases

Nucleotide SequenceProtein SequenceMolecule TypeStatus
KY242382
EMBL· GenBank· DDBJ
ARV78145.1
EMBL· GenBank· DDBJ
Genomic DNA
KY242384
EMBL· GenBank· DDBJ
ARV78287.1
EMBL· GenBank· DDBJ
Genomic DNA

Similar Proteins

Disclaimer

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