APL2 — Sorghum bicolor

Summary

SORBI_3009G245000 (SbAPL2) on sorghum chromosome 9 encodes an ADP-glucose pyrophosphorylase large subunit (EC 2.7.7.27) with ADGase activity and ATP binding. This enzyme is a component of the glucose-1-phosphate adenylyltransferase complex and is associated with starch and sucrose metabolism, glycogen anabolism, and primary metabolism. The gene is linked to plastid and amyloplast localization, as well as cytosol. SbAPL2 is associated with starch biosynthesis, seed development, root gravitropism, and responses to abiotic stimuli. It is associated with traits including stem dry weight, grain filling period, photosynthetic rate, thousand grain weight, yield, and branching. The gene is also linked to phenotypes such as carbohydrate metabolism, endosperm starch synthesis, stress response, and herbicide tolerance. Studies of related genes in other species connect the family to grain filling, heat tolerance, seed weight, and endosperm starch content.