B8B4D0 · SPX1_ORYSI

Function

function

Involved in plant adaptation to phosphate (Pi) starvation (By similarity).
Inhibits PHR2 DNA-binding activity via a Pi-dependent protein interaction (By similarity).
Suppresses the regulation on expression of PT2 by PHR2 and accumulation of shoot Pi (By similarity).
Optimizes growth under phosphate-limited conditions through a negative feedback loop of the PSI (phosphate starvation-induced) signaling pathway (By similarity).
Regulates the expression of SPX2, SPX3 and SPX5 (By similarity).
May be an important link between signal transduction pathways related to phosphate starvation and cold stress (By similarity).
Together with SPX2, plays a negative role in the regulation of leaf inclination by preventing RLI1 transcription factor activity in Pi depleted conditions (By similarity).

GO annotations

all annotationsall molecular functionnucleotide bindingmolecular_functionnucleic acid bindingdna bindingchromatin bindingdna-binding transcription factor activityrna bindingcytoskeletal motor activitycatalytic activitynuclease activitysignaling receptor bindingstructural molecule activitytransporter activitybindingprotein bindingtranslation factor activity, rna bindinglipid bindingkinase activitytransferase activityhydrolase activityoxygen bindingenzyme regulator activitycarbohydrate bindingsignaling receptor activitytranslation regulator activitytranscription regulator activityother molecular functionall biological processcarbohydrate metabolic processgeneration of precursor metabolites and energynucleobase-containing compound metabolic processdna metabolic processtranslationlipid metabolic processtransportresponse to stresscell cyclecell communicationsignal transductioncell-cell signalingmulticellular organism developmentcircadian rhythmbiological_processmetabolic processcatabolic processbiosynthetic processresponse to light stimulusresponse to external stimulustropismresponse to biotic stimulusresponse to abiotic stimulusresponse to endogenous stimulusembryo developmentpost-embryonic developmentfruit ripeningabscissionpollinationflower developmentcellular processprogrammed cell deathphotosynthesiscellular component organizationcell growthprotein metabolic processcellular homeostasissecondary metabolic processreproductive processcell differentiationprotein modification processgrowthepigenetic regulation of gene expressionresponse to chemicalanatomical structure developmentregulation of molecular functionother biological processall cellular componentcellular_componentextracellular regioncell wallintracellular anatomical structurenucleusnuclear envelopenucleoplasmnucleoluscytoplasmmitochondrionlysosomeendosomevacuoleperoxisomeendoplasmic reticulumgolgi apparatuscytosolribosomecytoskeletonplasma membranechloroplastplastidthylakoidmembraneexternal encapsulating structureother cellular component
Cell color indicative of number of GO terms
AspectTerm
Cellular Componentnucleus
Biological Processcellular response to cold
Biological Processcellular response to phosphate starvation
Biological Processnegative regulation of unidimensional cell growth
Biological Processpositive regulation of cellular response to phosphate starvation
Biological Processregulation of leaf development

Names & Taxonomy

Protein names

  • Recommended name
    SPX domain-containing protein 1
  • Alternative names
    • Protein SPX DOMAIN GENE 1
      (OsSPX1
      )

Gene names

    • Name
      SPX1
    • ORF names
      OsI_23619

Organism names

  • Taxonomic identifier
  • Strain
    • cv. 93-11
  • Taxonomic lineage
    Eukaryota > Viridiplantae > Streptophyta > Embryophyta > Tracheophyta > Spermatophyta > Magnoliopsida > Liliopsida > Poales > Poaceae > BOP clade > Oryzoideae > Oryzeae > Oryzinae > Oryza > Oryza sativa

Accessions

  • Primary accession
    B8B4D0

Proteomes

Genome annotation databases

Subcellular Location

Keywords

PTM/Processing

Features

Showing features for chain.

TypeIDPosition(s)Description
ChainPRO_00003983461-295SPX domain-containing protein 1

Interaction

Subunit

Interacts (via SPX domain) with PHR2 (via C-terminus) (By similarity).
Interacts with RLI1 in the nucleus to prevents its positive regulation of leaf inclination during phosphate (Pi) starvation (By similarity).

Protein-protein interaction databases

Structure

Family & Domains

Features

Showing features for domain, region, compositional bias.

TypeIDPosition(s)Description
Domain1-166SPX
Region197-227Disordered
Compositional bias213-227Polar residues

Domain

The SPX domain is sufficient for inhibition of PHR2 binding to DNA.

Phylogenomic databases

Family and domain databases

Sequence

  • Sequence status
    Complete
  • Length
    295
  • Mass (Da)
    33,122
  • Last updated
    2009-03-03 v1
  • Checksum
    A90D7CBE631E0FD4
MKFGKSLSSQIVETLPEWRDKFLSYKDLKKRLKLIGGGGGGEERQAKRARVAADGGEEEAAAAAMTPEEAGFMRLLEAELDKFNSFFVEKEEEYIIRQKELQDRVARAAGRESKEELMRVRKEIVDFHGEMVLLENYSALNYTGLVKILKKYDKRTGALIRLPFIQKVLQQPFFTTDLLYKLVKQCEAMLDQLLPSNELPVSSEDGRGDSTNEDKPSNPSSSLVNGGTIPELDEIEYMESMYMKGTVAALRSLKEIRSGSSTVSAFSLPPLQGDSSPEEQQELWNKIPVIEQAAK

Features

Showing features for compositional bias.

TypeIDPosition(s)Description
Compositional bias213-227Polar residues

Keywords

Sequence databases

Nucleotide SequenceProtein SequenceMolecule TypeStatus
CM000131
EMBL· GenBank· DDBJ
EEC80929.1
EMBL· GenBank· DDBJ
Genomic DNA

Genome annotation databases

Similar Proteins

Disclaimer

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