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A gene family encoding glutathione peroxidase homologues in Hordeum vulgare (barley)
Author(s) -
Churin Yuri,
Schilling Silke,
Börner Thomas
Publication year - 1999
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1016/s0014-5793(99)01208-9
Subject(s) - hordeum vulgare , gene , glutathione peroxidase , peroxidase , gpx6 , gpx3 , biology , genetics , biochemistry , plastid , gene family , peroxisome , glutathione , genome , enzyme , botany , chloroplast , poaceae
We have isolated and characterised three barley cDNAs encoding glutathione peroxidase (GPX) homologues, designated HVGPH1, HVGPH2 and HVGPH3. HVGPH1 may represent a cytosolic form of GPX. The structure of the HVGPH2 N‐terminal domain is typical for a plastid transit peptide. A potential peroxisomal targeting sequence occurs near the N‐terminus of HVGPH3. Transcript levels of HVGPH1 and HVGPH2 were increased in leaves undergoing stress. In contrast, HVGPH3 mRNA accumulation showed a negative response to stress. Our data indicate that the barley genome bears a small gene family encoding GPX homologues differing in their function and cellular localisation.