XA5 — Oryza sativa Indica Group

Summary

BGIOSGA005261 (XA5, OiXA5) on chromosome 1 of Indica rice encodes a protein with TFIIA_gsu, TFIIA_gsu_N, TFIIA_a-hlx, TFIIA_gsu_C, and TFIIA_b-brl domains, and is annotated with general transcription factor (GTF2) activity, TBP-class protein binding, and translation initiation factor activity. The protein localizes to the nucleus as part of the TFIIA complex and is associated with RNA polymerase II transcription pre-initiation complex formation and defense response. XA5 is associated with bacterial blight resistance, with observed phenotypes including resistance to bacterial blight and blight disease. The gene is also associated with root morphology traits. Studies of related genes in other species link the TFIIAγ family to grain weight, grain number, panicle number, tiller number, plant height, and grain yield, though these associations are not yet established for XA5 itself.