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    PSAG photosystem I subunit G [ Arabidopsis thaliana (thale cress) ]

    Gene ID: 842016, updated on 18-Sep-2024

    Summary

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    Official Symbol
    PSAG
    Official Full Name
    photosystem I subunit G
    Primary source
    TAIR:AT1G55670
    Locus tag
    AT1G55670
    See related
    Araport:AT1G55670
    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
    photosystem I subunit G; PSI-G
    Summary
    Encodes subunit G of photosystem I, an 11-kDa membrane protein that plays an important role in electron transport between plastocyanin and PSI and is involved in the stability of the PSI complex. PSI-G subunit is bound to PSI-B and is in contact with Lhca1. The protein inserts into thylakoids by a direct or ''spontaneous'' pathway that does not involve the activities of any known chloroplast protein-targeting machinery. PSI-G appears to be directly or indirectly involved in the interaction between Photosystem I and plastocyanin.
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    Genomic context

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    See PSAG in Genome Data Viewer
    Location:
    chromosome: 1
    Exon count:
    1
    Sequence:
    Chromosome: 1; NC_003070.9 (20802670..20803449, complement)

    Chromosome 1 - NC_003070.9Genomic Context describing neighboring genes Neighboring gene HMG (high mobility group) box protein with ARID/BRIGHT DNA-binding domain-containing protein Neighboring gene ncRNA Neighboring gene FBD, F-box and Leucine Rich Repeat domains containing protein Neighboring gene uncharacterized protein Neighboring gene uncharacterized protein Neighboring gene Transducin/WD40 repeat-like superfamily protein

    Genomic regions, transcripts, and products

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    Genomic Sequence:
    NC_003070.9

    Go to nucleotide: Graphics FASTA GenBank

    Bibliography

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    Related articles in PubMed

    1. The properties of the positively charged loop region in PSI-G are essential for its "spontaneous" insertion into thylakoids and rapid assembly into the photosystem I complex. Zygadlo A, et al. J Biol Chem, 2006 Apr 14. PMID 16478728
    2. Photosystem I activity is increased in the absence of the PSI-G subunit. Jensen PE, et al. J Biol Chem, 2002 Jan 25. PMID 11707465
    3. Single and double knockouts of the genes for photosystem I subunits G, K, and H of Arabidopsis. Effects on photosystem I composition, photosynthetic electron flow, and state transitions. Varotto C, et al. Plant Physiol, 2002 Jun. PMID 12068106, Free PMC Article
    4. Photosystem I lacking the PSI-G subunit has a higher affinity for plastocyanin and is sensitive to photodamage. Zygadlo A, et al. Biochim Biophys Acta, 2005 Jun 30. PMID 15953472
    5. Insertion of the plant photosystem I subunit G into the thylakoid membrane. Rosgaard L, et al. FEBS J, 2005 Aug. PMID 16045770

    See all (18) citations in PubMed

    GeneRIFs: Gene References Into Functions

    What's a GeneRIF?
    1. the loop region of PSI-G is important for proper integration into the PSI core
      Title: Insertion of the plant photosystem I subunit G into the thylakoid membrane.
    Submit: New GeneRIF Correction

    Pathways from PubChem

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    Interactions

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    Products Interactant Other Gene Complex Source Pubs Description

    General gene information

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    Homology

    NM_104443.2

    Gene Ontology Provided by TAIR

    Function Evidence Code Pubs
    enables molecular_function ND
    No biological Data available
    more info
    		  
    Process Evidence Code Pubs
    acts_upstream_of_or_within photosynthesis IMP
    Inferred from Mutant Phenotype
    more info
    		 PubMed 
    acts_upstream_of_or_within photosynthetic NADP+ reduction IMP
    Inferred from Mutant Phenotype
    more info
    		 PubMed 
    acts_upstream_of_or_within photosynthetic electron transport in photosystem I IMP
    Inferred from Mutant Phenotype
    more info
    		 PubMed 
    acts_upstream_of_or_within photosystem I stabilization IMP
    Inferred from Mutant Phenotype
    more info
    		 PubMed 
    acts_upstream_of_or_within protein 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 envelope HDA PubMed 
    part_of chloroplast photosystem I IDA
    Inferred from Direct Assay
    more info
    		 PubMed 
    located_in chloroplast thylakoid HDA PubMed 
    located_in chloroplast thylakoid membrane HDA PubMed 
    located_in chloroplast thylakoid membrane IDA
    Inferred from Direct Assay
    more info
    		 PubMed 
    located_in nucleus HDA PubMed 
    located_in thylakoid HDA PubMed 

    General protein information

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    Preferred Names
    photosystem I subunit G
    NP_175963.1
    • photosystem I subunit G (PSAG); FUNCTIONS IN: molecular_function unknown; INVOLVED IN: photosynthetic NADP+ reduction, photosystem I stabilization, protein stabilization, photosynthetic electron transport in photosystem I, photosynthesis; LOCATED IN: in 7 components; EXPRESSED IN: 24 plant structures; EXPRESSED DURING: 14 growth stages; CONTAINS InterPro DOMAIN/s: Photosystem I reaction centre, PsaG, plant (InterPro:IPR017494), Photosystem I PsaG/PsaK protein (InterPro:IPR000549), Photosystem I reaction centre, PsaG/PsaK, plant (InterPro:IPR016370); Has 117 Blast hits to 117 proteins in 27 species: Archae - 0; Bacteria - 0; Metazoa - 0; Fungi - 0; Plants - 117; Viruses - 0; Other Eukaryotes - 0 (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_003070.9 Reference assembly

      Range
      20802670..20803449 complement
      Download
      GenBank, FASTA, Sequence Viewer (Graphics)

    mRNA and Protein(s)

    1. NM_104443.2 → NP_175963.1  photosystem I subunit G [Arabidopsis thaliana]

      See identical proteins and their annotated locations for NP_175963.1

      Status: REVIEWED

      UniProtKB/Swiss-Prot
      Q42310, Q9S7N7
      UniProtKB/TrEMBL
      A0A178W7I8, A0A5S9WMM5, A0A654EK87
      Conserved Domains (1) summary
      PLN00091
      Location:3 → 160
      PLN00091; photosystem I reaction center subunit V (PsaG); Provisional
    Nucleotide Protein
    Heading Accession and Version
    Protein Accession Links
    GenPept Link UniProtKB Link
    Q9S7N7.1

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