A0A8E4BZM8 · A0A8E4BZM8_9CHLO

  • Protein
    Photosystem II D2 protein
  • Gene
    psbD
  • Status
    UniProtKB unreviewed (TrEMBL)
  • Amino acids
  • Protein existence
    Inferred from homology
  • Annotation score
    3/5

Function

function

Photosystem II (PSII) is a light-driven water:plastoquinone oxidoreductase that uses light energy to abstract electrons from H2O, generating O2 and a proton gradient subsequently used for ATP formation. It consists of a core antenna complex that captures photons, and an electron transfer chain that converts photonic excitation into a charge separation. The D1/D2 (PsbA/PsbD) reaction center heterodimer binds P680, the primary electron donor of PSII as well as several subsequent electron acceptors. D2 is needed for assembly of a stable PSII complex.

Miscellaneous

2 of the reaction center chlorophylls (ChlD1 and ChlD2) are entirely coordinated by water.

Catalytic activity

Features

Showing features for binding site.

135250100150200250300350
TypeIDPosition(s)Description
Binding site117Mg (UniProtKB | ChEBI) of chlorophyll a ChlzD2 (UniProtKB | ChEBI); axial binding residue
Binding site129pheophytin a D2 (UniProtKB | ChEBI)
Binding site142pheophytin a D2 (UniProtKB | ChEBI)
Binding site197Mg (UniProtKB | ChEBI) of chlorophyll a PD2 (UniProtKB | ChEBI); axial binding residue
Binding site214Fe cation (UniProtKB | ChEBI); ligand shared with heterodimeric partner
Binding site214a plastoquinone Q(A) (UniProtKB | ChEBI)
Binding site261a plastoquinone Q(A) (UniProtKB | ChEBI)
Binding site268Fe cation (UniProtKB | ChEBI); ligand shared with heterodimeric partner

GO annotations

AspectTerm
Cellular Componentchloroplast thylakoid membrane
Cellular Componentphotosystem II
Molecular Functionchlorophyll binding
Molecular Functionelectron transporter, transferring electrons within the cyclic electron transport pathway of photosynthesis activity
Molecular Functioniron ion binding
Molecular Functionoxidoreductase activity
Biological Processphotosynthetic electron transport in photosystem II

Keywords

Enzyme and pathway databases

Names & Taxonomy

Protein names

  • Recommended name
    Photosystem II D2 protein
  • EC number
  • Short names
    PSII D2 protein
  • Alternative names
    • Photosystem Q(A) protein

Gene names

    • Name
      psbD

Encoded on

  • Chloroplast

Organism names

  • Taxonomic identifier
  • Organism
  • Strain
    • 311 I
  • Taxonomic lineage
    Eukaryota > Viridiplantae > Chlorophyta > core chlorophytes > Trebouxiophyceae > Trebouxiophyceae incertae sedis > Coccomyxaceae > Medakamo

Accessions

  • Primary accession
    A0A8E4BZM8

Subcellular Location

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

Features

Showing features for transmembrane.

TypeIDPosition(s)Description
Transmembrane27-49Helical
Transmembrane110-128Helical
Transmembrane140-160Helical
Transmembrane166-184Helical
Transmembrane196-216Helical
Transmembrane266-291Helical

Keywords

PTM/Processing

Keywords

Interaction

Subunit

PSII is composed of 1 copy each of membrane proteins PsbA, PsbB, PsbC, PsbD, PsbE, PsbF, PsbH, PsbI, PsbJ, PsbK, PsbL, PsbM, PsbT, PsbX, PsbY, PsbZ, Psb30/Ycf12, at least 3 peripheral proteins of the oxygen-evolving complex and a large number of cofactors. It forms dimeric complexes.

Family & Domains

Sequence similarities

Belongs to the reaction center PufL/M/PsbA/D family.

Keywords

Family and domain databases

Sequence

  • Sequence status
    Complete
  • Length
    352
  • Mass (Da)
    39,505
  • Last updated
    2022-01-19 v1
  • Checksum
    22BE4E6B78F10832
MTIAIGKPQEKRTWFDEVDDWLRRERFVFVGWSGLLLLPNAYFALGGWFTGTTFVTSWYTHGLASSYLEGCNFLSAAVSTPANSMGHSLLLLWGPEAQGDFTRWCQLGGLWTFVALHGAFALIGFMLRQFELARSVKIRPYNAIAFSAPIAVFVSVFLIYPLGQSGWFFAPSFGVAAIFRFILFFQGFHNWTLNPFHMMGVAGVLGAALLCAIHGATVENTLFEDGDGANTFRAFNPTQAEETYSMVTANRFWSQIFGVAFSNKRWLHFFMLFVPVTGLWMSAIGVVGLALNLRAYDFVSQEIRAAEDPEFETFYTKNILLNEGIRAWMAAQDQPHEKLVFPEEVLPRGNAL

Sequence databases

Nucleotide SequenceProtein SequenceMolecule TypeStatus
LC604816
EMBL· GenBank· DDBJ
BCT02567.1
EMBL· GenBank· DDBJ
Genomic DNA

Similar Proteins

Disclaimer

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