GYRB — Beta vulgaris subsp. vulgaris

Summary

BvGYRB (BVRB_3G063000) on sugar beet chromosome 3 encodes a DNA gyrase subunit B, a type II topoisomerase with DNA negative supercoiling activity, DNA topoisomerase type II activity, and ATP, DNA, and metal binding. The protein contains DNA_gyrase_B_C and TOPRIM domains. It is associated with DNA topological change, sister chromatid segregation, and resolution of meiotic recombination intermediates. The gene product localizes to the chloroplast nucleoid, chromosome, mediator complex, mitochondria, cytoplasm, and nucleus. It is linked to root morphology traits and phenotypes including resistance to ciprofloxacin and normal chloroplast morphology. Related genes in other species link the family to ciprofloxacin resistance and pith necrosis resistance.