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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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