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P5CS2 delta 1-pyrroline-5-carboxylate synthase 2 [ Arabidopsis thaliana (thale cress) ]

Gene ID: 824727, updated on 4-Feb-2026
Official Symbol
P5CS2
Official Full Name
delta 1-pyrroline-5-carboxylate synthase 2
Primary source
TAIR:AT3G55610
Locus tag
AT3G55610
See related
Araport:AT3G55610
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
delta 1-pyrroline-5-carboxylate synthase 2
Summary
encodes delta 1-pyrroline-5-carboxylate synthetase B. Gene expression is induced by dehydration, high salt and ABA. Knock-out mutations in P5CS2 are embryo-lethal. P5CS2 appears to be present in different cells and/or different subcellular locations from P5CS1 in a tissue-dependent manner. Mutants are defective in pollen development.
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Location:
chromosome: 3
Exon count:
20
Sequence:
Chromosome: 3; NC_003074.8 (20624020..20629295, complement)

Chromosome 3 - NC_003074.8Genomic Context describing neighboring genes Neighboring gene miscRNA Neighboring gene Membrane fusion protein Use1 Neighboring gene Mitochondrial glycoprotein family protein Neighboring gene Translation initiation factor IF6 Neighboring gene DHFS-FPGS homolog D

Genomic Sequence:
NC_003074.8
Products Interactant Other Gene Complex Source Pubs Description
Preferred Names
delta 1-pyrroline-5-carboxylate synthase 2
NP_001118846.1
  • delta 1-pyrroline-5-carboxylate synthase 2 (P5CS2); FUNCTIONS IN: oxidoreductase activity, catalytic activity, glutamate 5-kinase activity; INVOLVED IN: hyperosmotic salinity response, proline biosynthetic process, response to abscisic acid stimulus, embryo development ending in seed dormancy; LOCATED IN: chloroplast, cytoplasm; EXPRESSED IN: 16 plant structures; EXPRESSED DURING: L mature pollen stage, M germinated pollen stage, C globular stage, D bilateral stage, E expanded cotyledon stage; CONTAINS InterPro DOMAIN/s: Glutamate 5-kinase (InterPro:IPR001057), Glutamate 5-kinase, conserved site (InterPro:IPR019797), Aspartate/glutamate/uridylate kinase (InterPro:IPR001048), Aldehyde dehydrogenase, N-terminal (InterPro:IPR016162), Aldehyde dehydrogenase, C-terminal (InterPro:IPR016163), Delta l-pyrroline-5-carboxylate synthetase (InterPro:IPR005766), Aldehyde/histidinol dehydrogenase (InterPro:IPR016161), Aldehyde dehydrogenase (InterPro:IPR015590), Glutamate 5-kinase, ProB-related (InterPro:IPR005715); BEST Arabidopsis thaliana protein match is: delta1-pyrroline-5-carboxylate synthase 1 (TAIR:AT2G39800.4); Has 30201 Blast hits to 17322 proteins in 780 species: Archae - 12; Bacteria - 1396; Metazoa - 17338; Fungi - 3422; Plants - 5037; Viruses - 0; Other Eukaryotes - 2996 (source: NCBI BLink).
NP_191120.2
  • delta 1-pyrroline-5-carboxylate synthase 2 (P5CS2); FUNCTIONS IN: oxidoreductase activity, glutamate-5-semialdehyde dehydrogenase activity, catalytic activity, glutamate 5-kinase activity; INVOLVED IN: hyperosmotic salinity response, proline biosynthetic process, response to abscisic acid stimulus, embryo development ending in seed dormancy; LOCATED IN: chloroplast, cytoplasm; EXPRESSED IN: 16 plant structures; EXPRESSED DURING: L mature pollen stage, M germinated pollen stage, C globular stage, D bilateral stage, E expanded cotyledon stage; CONTAINS InterPro DOMAIN/s: Glutamate 5-kinase (InterPro:IPR001057), Aspartate/glutamate/uridylate kinase (InterPro:IPR001048), Glutamate 5-kinase, conserved site (InterPro:IPR019797), Aldehyde dehydrogenase, N-terminal (InterPro:IPR016162), Gamma-glutamyl phosphate reductase GPR, conserved site (InterPro:IPR020593), Aldehyde dehydrogenase, C-terminal (InterPro:IPR016163), Delta l-pyrroline-5-carboxylate synthetase (InterPro:IPR005766), Gamma-glutamyl phosphate reductase GPR (InterPro:IPR000965), Aldehyde/histidinol dehydrogenase (InterPro:IPR016161), Glutamate 5-kinase, ProB-related (InterPro:IPR005715); BEST Arabidopsis thaliana protein match is: delta1-pyrroline-5-carboxylate synthase 1 (TAIR:AT2G39800.4); Has 14836 Blast hits to 14828 proteins in 2349 species: Archae - 139; Bacteria - 9225; Metazoa - 151; Fungi - 264; Plants - 176; Viruses - 0; Other Eukaryotes - 4881 (source: NCBI BLink).

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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
    20624020..20629295 complement
    Download
    GenBank, FASTA, Sequence Viewer (Graphics)

mRNA and Protein(s)

  1. NM_115419.5NP_191120.2  delta 1-pyrroline-5-carboxylate synthase 2 [Arabidopsis thaliana]

    See identical proteins and their annotated locations for NP_191120.2

    Status: REVIEWED

    UniProtKB/Swiss-Prot
    P54888, Q9M061
    UniProtKB/TrEMBL
    A0A178VF78, A0A5S9XLT7, A0A7G2EY39
    Conserved Domains (1) summary
    PLN02418
    Location:1717
    PLN02418; delta-1-pyrroline-5-carboxylate synthase
  2. NM_001125374.1NP_001118846.1  delta 1-pyrroline-5-carboxylate synthase 2 [Arabidopsis thaliana]

    See identical proteins and their annotated locations for NP_001118846.1

    Status: REVIEWED

    UniProtKB/TrEMBL
    A0A7G2EY39, B3H5E3
    Conserved Domains (3) summary
    cd07079
    Location:296621
    ALDH_F18-19_ProA-GPR; Gamma-glutamyl phosphate reductase (GPR), aldehyde dehydrogenase families 18 and 19
    PLN02418
    Location:1621
    PLN02418; delta-1-pyrroline-5-carboxylate synthase
    cl00452
    Location:7281
    AAK; Amino Acid Kinases (AAK) superfamily, catalytic domain; present in such enzymes like N-acetylglutamate kinase (NAGK), carbamate kinase (CK), aspartokinase (AK), glutamate-5-kinase (G5K) and UMP kinase (UMPK). The AAK superfamily includes kinases that ...