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    PSBO2 photosystem II subunit O-2 [ Arabidopsis thaliana (thale cress) ]

    Gene ID: 824246, updated on 18-Sep-2024

    Summary

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    Official Symbol
    PSBO2
    Official Full Name
    photosystem II subunit O-2
    Primary source
    TAIR:AT3G50820
    Locus tag
    AT3G50820
    See related
    Araport:AT3G50820
    Gene type
    protein coding
    RefSeq status
    REVIEWED
    Organism
    Arabidopsis thaliana (ecotype: Columbia)
    Lineage
    Eukaryota; Viridiplantae; Streptophyta; Embryophyta; Tracheophyta; Spermatophyta; Magnoliopsida; eudicotyledons; Gunneridae; Pentapetalae; rosids; malvids; Brassicales; Brassicaceae; Camelineae; Arabidopsis
    Also known as
    MSP-2; OEC33; OXYGEN EVOLVING COMPLEX SUBUNIT 33 KDA; photosystem II subunit O-2; PHOTOSYSTEM II SUBUNIT O-2; PSBO; PSBO-2
    Summary
    Encodes a protein which is an extrinsic subunit of photosystem II and which has been proposed to play a central role in stabilization of the catalytic manganese cluster. In <i>Arabidopsis thaliana</i> the PsbO proteins are encoded by two genes: <i>psbO1</i> and <i>psbO2</i>. PsbO2 is the minor isoform in the wild-type. Mutants defective in this gene have been shown to be affected in the dephosphorylation of the D1 protein of PSII.
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    Genomic context

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    See PSBO2 in Genome Data Viewer
    Location:
    chromosome: 3
    Exon count:
    3
    Sequence:
    Chromosome: 3; NC_003074.8 (18890874..18892508, complement)

    Chromosome 3 - NC_003074.8Genomic Context describing neighboring genes Neighboring gene PLATZ transcription factor family protein Neighboring gene Uncharacterized protein family (UPF0497) Neighboring gene ncRNA Neighboring gene ncRNA

    Genomic regions, transcripts, and products

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    Genomic Sequence:
    NC_003074.8

    Go to nucleotide: Graphics FASTA GenBank

    Bibliography

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    GeneRIFs: Gene References Into Functions

    What's a GeneRIF?
    1. The irradiance response of photosynthetic oxygen evolution showed that low PsbO plants had a reduced quantum yield, but matched the oxygen evolution rates of wildtype plants at saturating irradiance.
      Title: Antisense reductions in the PsbO protein of photosystem II leads to decreased quantum yield but similar maximal photosynthetic rates.
    2. The presence of only the PsbO1 isoform in the psbo2 mutant did not induce any significant differences in the performance of PSII under standard growth conditions as compared to wild type.
      Title: Comparison of the electron transport properties of the psbo1 and psbo2 mutants of Arabidopsis thaliana.
    3. PsbO2 has a threefold higher GTPase activity than PsbO1.
      Title: Towards understanding the functional difference between the two PsbO isoforms in Arabidopsis thaliana--insights from phenotypic analyses of psbo knockout mutants.
    4. Results characterize the functional differences between PsbO1 and PsbO2, and show that PsbO1 is the major isoform in wild-type plants.
      Title: Functional dissection of two Arabidopsis PsbO proteins: PsbO1 and PsbO2.
    5. amount of photosystem II reaction centers was compromised in plants that exhibited low amounts of the manganese-stabilizing proteins
      Title: The manganese-stabilizing protein is required for photosystem II assembly/stability and photoautotrophy in higher plants.
    6. interaction of PsbO2 with PSII regulates the turnover of the D1 protein
      Title: The Arabidopsis PsbO2 protein regulates dephosphorylation and turnover of the photosystem II reaction centre D1 protein.
    Submit: New GeneRIF Correction

    Interactions

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    Products Interactant Other Gene Complex Source Pubs Description

    General gene information

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    NM_114942.3

    Gene Ontology Provided by TAIR

    Function Evidence Code Pubs
    enables mRNA binding IDA
    Inferred from Direct Assay
    more info
    		 PubMed 
    enables oxygen evolving activity IEA
    Inferred from Electronic Annotation
    more info
    		  
    enables oxygen evolving activity ISS
    Inferred from Sequence or Structural Similarity
    more info
    		 PubMed 
    enables poly(U) RNA binding IDA
    Inferred from Direct Assay
    more info
    		 PubMed 
    enables protein binding IPI
    Inferred from Physical Interaction
    more info
    		 PubMed 
    Process Evidence Code Pubs
    acts_upstream_of_or_within photoinhibition IMP
    Inferred from Mutant Phenotype
    more info
    		 PubMed 
    acts_upstream_of_or_within photosynthesis, light reaction ISS
    Inferred from Sequence or Structural Similarity
    more info
    		 PubMed 
    acts_upstream_of_or_within photosystem II assembly IMP
    Inferred from Mutant Phenotype
    more info
    		 PubMed 
    acts_upstream_of_or_within photosystem II stabilization IMP
    Inferred from Mutant Phenotype
    more info
    		 PubMed 
    Component Evidence Code Pubs
    located_in chloroplast HDA PubMed 
    located_in chloroplast ISM
    Inferred from Sequence Model
    more info
    		  
    located_in chloroplast stroma HDA PubMed 
    located_in chloroplast thylakoid HDA PubMed 
    located_in chloroplast thylakoid lumen HDA PubMed 
    located_in chloroplast thylakoid membrane HDA PubMed 
    located_in cytosol HDA PubMed 
    part_of photosystem II oxygen evolving complex IEA
    Inferred from Electronic Annotation
    more info
    		  
    located_in plastoglobule HDA PubMed 
    located_in thylakoid HDA PubMed 
    located_in thylakoid IDA
    Inferred from Direct Assay
    more info
    		 PubMed 
    located_in thylakoid lumen HDA PubMed 

    General protein information

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    Preferred Names
    photosystem II subunit O-2
    NP_190651.1
    • photosystem II subunit O-2 (PSBO2); FUNCTIONS IN: oxygen evolving activity, poly(U) RNA binding; INVOLVED IN: photosynthesis, light reaction, photoinhibition, photosystem II assembly, photosystem II stabilization, regulation of protein amino acid dephosphorylation; LOCATED IN: in 9 components; EXPRESSED IN: 24 plant structures; EXPRESSED DURING: 14 growth stages; CONTAINS InterPro DOMAIN/s: Photosystem II manganese-stabilising protein PsbO (InterPro:IPR002628); BEST Arabidopsis thaliana protein match is: PS II oxygen-evolving complex 1 (TAIR:AT5G66570.1); Has 534 Blast hits to 532 proteins in 148 species: Archae - 0; Bacteria - 144; Metazoa - 1; Fungi - 0; Plants - 207; Viruses - 0; Other Eukaryotes - 182 (source: NCBI BLink).

    NCBI Reference Sequences (RefSeq)

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    Genome Annotation

    The following sections contain reference sequences that belong to a specific genome build. Explain

    Reference assembly

    Genomic

    1. NC_003074.8 Reference assembly

      Range
      18890874..18892508 complement
      Download
      GenBank, FASTA, Sequence Viewer (Graphics)

    mRNA and Protein(s)

    1. NM_114942.3 → NP_190651.1  photosystem II subunit O-2 [Arabidopsis thaliana]

      See identical proteins and their annotated locations for NP_190651.1

      Status: REVIEWED

      UniProtKB/Swiss-Prot
      Q9S841
      UniProtKB/TrEMBL
      A0A178VBH5, A0A654FGK8
      Conserved Domains (1) summary
      PLN00037
      Location:19 → 331
      PLN00037; photosystem II oxygen-evolving enhancer protein 1; Provisional
    Nucleotide Protein
    Heading Accession and Version
    Protein Accession Links
    GenPept Link UniProtKB Link
    Q9S841.1

    Gene LinkOut

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