A0A1Y0B5F9 · A0A1Y0B5F9_9APIA

  • 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.

1750100200300400500600700
TypeIDPosition(s)Description
Binding site573[4Fe-4S] cluster (UniProtKB | ChEBI); ligand shared between dimeric partners
Binding site582[4Fe-4S] cluster (UniProtKB | ChEBI); ligand shared between dimeric partners
Binding site675Mg (UniProtKB | ChEBI) of chlorophyll a' A1 (UniProtKB | ChEBI); axial binding residue
Binding site683Mg (UniProtKB | ChEBI) of chlorophyll a A3 (UniProtKB | ChEBI); axial binding residue
Binding site691chlorophyll a A3 (UniProtKB | ChEBI)
Binding site692phylloquinone A (UniProtKB | ChEBI)

GO annotations

AspectTerm
Cellular Componentchloroplast
Cellular Componentphotosystem I
Cellular Componentthylakoid membrane
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
    • PsaA

Gene names

    • Name
      psaA

Encoded on

  • Plastid

Organism names

  • Taxonomic identifier
  • Organism
  • Taxonomic lineage
    Eukaryota > Viridiplantae > Streptophyta > Embryophyta > Tracheophyta > Spermatophyta > Magnoliopsida > eudicotyledons > Gunneridae > Pentapetalae > asterids > campanulids > Apiales > Apiaceae > Apioideae > Physospermopsis clade > Hansenia

Accessions

  • Primary accession
    A0A1Y0B5F9

Subcellular Location

Cellular thylakoid membrane
; Multi-pass membrane protein
Membrane
; Multi-pass membrane protein

Features

Showing features for transmembrane.

TypeIDPosition(s)Description
Transmembrane154-176Helical
Transmembrane350-370Helical
Transmembrane390-412Helical
Transmembrane433-454Helical
Transmembrane531-549Helical
Transmembrane590-610Helical
Transmembrane664-686Helical
Transmembrane730-748Helical

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
    750
  • Mass (Da)
    83,084
  • Last updated
    2017-08-30 v1
  • Checksum
    42BEF184B9A91374
MIIRSPEPEVKILVDRDHIKTSFEEWARPGHFSRTLAKGPDTTTWIWNLHADAHDFDSHTSDLEEISRKVFSAHFGQLSIIFLWLSGMYFHGARFSNYEAWLSDPTHIGPSAQVVWPIVGQEILNGDVGGGFRGIQITSGFFQIWRASGITSELQLYCTAIGALIFAALMLFAGWFHYHKAAPKLAWFQDVESMLNHHLAGLLGLGSLSWAGHQVHVSLPINQFLNAGVDPKEIPLPHEFILNRDLLAQLYPSFAEGATPLFTLNWSKYSDFLTFRGGLDPVTGGLWLTDIAHHHLAIAILFLIAGHMYKTNWGIGHGLKDILEAHKGPFTGQGHKGLYEILTTSWHAQLSLNLAMLGSLTIVVAHHMYSMPPYPYLATDYGTQLSLFTHHMWIGGFLIVGAAAHAAIFMVRDYDPTTRYNDLLDRVLRHRDAIISHLNWACIFLGFHSFGLYIHNDTMSALGRPQDMFSDTAIQLQPVFAQWIQNTHALAPGATAPGATTSTSLTWGGGDLVAVGGKVALLPIPLGTADFLVHHIHAFTIHVTVLILLKGVLFARSSRLIPDKANLGFRFPCDGPGRGGTCQVSAWDHVFLGLFWMYNAISVVIFHFSWKMQSDVWGSISDQGVVTHITGGNFAQSSITINGWLRDFLWAQASQVIQSYGSSLSAYGLFFLGAHFVWAFSLMFLFSGRGYWQELIESIVWAHNKLKVAPATQPRALSIVQGRAVGVTHYLLGGIATTWAFFLARIIAVG

Sequence databases

Nucleotide SequenceProtein SequenceMolecule TypeStatus
KX808493
EMBL· GenBank· DDBJ
ART32635.1
EMBL· GenBank· DDBJ
Genomic DNA
MK193789
EMBL· GenBank· DDBJ
QBX96437.1
EMBL· GenBank· DDBJ
Genomic DNA
MK193794
EMBL· GenBank· DDBJ
QBX96862.1
EMBL· GenBank· DDBJ
Genomic DNA
MK193795
EMBL· GenBank· DDBJ
QBX96947.1
EMBL· GenBank· DDBJ
Genomic DNA
MK193798
EMBL· GenBank· DDBJ
QBX97202.1
EMBL· GenBank· DDBJ
Genomic DNA
MK193799
EMBL· GenBank· DDBJ
QBX97287.1
EMBL· GenBank· DDBJ
Genomic DNA
MK193800
EMBL· GenBank· DDBJ
QBX97372.1
EMBL· GenBank· DDBJ
Genomic DNA
MG197728
EMBL· GenBank· DDBJ
QHV37284.1
EMBL· GenBank· DDBJ
Genomic DNA
MG197729
EMBL· GenBank· DDBJ
QHV37369.1
EMBL· GenBank· DDBJ
Genomic DNA
MG197730
EMBL· GenBank· DDBJ
QHV37454.1
EMBL· GenBank· DDBJ
Genomic DNA
MT843762
EMBL· GenBank· DDBJ
QPG23913.1
EMBL· GenBank· DDBJ
Genomic DNA

Similar Proteins

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