title: Cloning and characterisation of a cytosolic glutathione reductase cDNA from pea (Pisum sativum L.) and its expression in response to stress.
abstract: A second glutathione reductase (GR) cDNA has been cloned and sequenced from pea (Pisum sativum L. cv. Birte). This new GR cDNA (GOR2) does not encode a pre-protein with a transit peptide and therefore is most likely to represent a cytosolic GR. It is significantly different at the DNA level from the previously cloned chloroplastidial/mitochondrial pea GR (GOR1), but retains the features characteristic of GRs from all sources and has GR activity when expressed in Escherichia coli. GOR2 maps to linkage group 6 on the pea genome map and it seems likely that this is the only locus for this gene. In contrast to GOR1, transcript levels of GOR2 increase in the recovery (post-stress) phases of both drought and chilling by about ten- and three-fold respectively. GOR2 therefore may play a role in the restoration of the post-stress redox state of the cytosolic glutathione pool.
authors.affiliation: John Innes Centre, Colney, Norwich, UK.
authors.forename: R G
authors.initials: RG
authors.lastname: Stevens
authors.forename: G P
authors.initials: GP
authors.lastname: Creissen
authors.forename: P M
authors.initials: PM
authors.lastname: Mullineaux
mesh_terms: D000595:Amino Acid Sequence; D001483:Base Sequence; D003001:Cloning, Molecular; D003080:Cold Temperature; D003600:Cytosol / Q000201:enzymology; D018076:DNA, Complementary / Q000235:genetics*; D018744:DNA, Plant / Q000235:genetics*; D003890:Desiccation; D004926:Escherichia coli / Q000235:genetics; D018506:Gene Expression Regulation, Plant / Q000502:physiology*; D005980:Glutathione Reductase / Q000235:genetics*; D008969:Molecular Sequence Data; D016366:Open Reading Frames / Q000235:genetics; D018532:Pisum sativum / Q000201:enzymology / Q000235:genetics* / Q000502:physiology; D012333:RNA, Messenger / Q000032:analysis; D018749:RNA, Plant / Q000032:analysis; D011993:Recombinant Fusion Proteins; D015183:Restriction Mapping; D017422:Sequence Analysis, DNA; D017386:Sequence Homology, Amino Acid; D012689:Sequence Homology, Nucleic Acid
chemical_list: D018076:DNA, Complementary; D018744:DNA, Plant; D012333:RNA, Messenger; D018749:RNA, Plant; D011993:Recombinant Fusion Proteins; D005980:Glutathione Reductase