PINB — Triticum aestivum

Summary

TRAESCS5B02G003500 (symbol PINB) on bread wheat chromosome 5B encodes a bifunctional inhibitor/plant lipid transfer protein/seed storage helical domain-containing protein, also known as Gsp1B, with serine-type endopeptidase inhibitor activity, nutrient reservoir activity and toxin activity. The gene is associated with endosperm development, embryogenesis, pre-harvest sprouting, sucrose transport, starch breakdown, cell adhesion, digestion, protein synthesis, arginine anabolism, the TCA cycle, DNA recombination and condensation, sumoylation, syngamy, and nitric oxide storage. It localises to the extracellular region and membrane. PINB is linked to numerous grain traits including seed hardness, texture, vitreousness, size, weight, width, protein content, starch content and digestibility, flour and starch yield, test weight, germination rate, sprouting tolerance, drought tolerance, and stomatal resistance. Studies of related genes in other species connect the family to grain thickness.