Identification and characterization of 20S proteasome genes and their relevance to heat/drought tolerance in bread wheat

The genes encoding α- and β-type subunits of 20S proteasome core protease are integral components 26S complex in the ubiquitin-proteasome system (UPS). represents a catalytic particle that cleaves cytotoxic, denatured, damaged unwanted proteins an ATP/ubiquitin-dependent non-lysosomal pathway is known to impart thermotolerance model plants. In present study, we identified 67 (including 34 TaPA + 33 TaPB genes) β-subunits bread wheat ( Triticum aestivum L.). These were distributed on all 21 chromosomes, majority them being triplicate homoeologues. orthologous corresponding rice Arabidopsis genes. Phylogenetic analysis placed these seven clusters, each with one α (α1-7) β (β1-7) subunits. Expression suggested 10 involved heat stress response, whereas four drought tolerance at seedling stage. Nine (9) expressed under both suggesting their involvement response multiple abiotic stresses. Hopefully, future research TaPA/TaPB genes, will help development climate resilient cultivars. • Sixty-seven for 14 detected wheat. conserved among wheat, Arabidopsis. Duplications have occurred before polyploidization Twenty-three upregulated 6 h drought.