PTB — Solanum tuberosum

Summary

PGSC0003DMG400001427, symbol PTB and preferred name PTB7, is a potato gene on chromosome 2 that encodes an RNA-binding protein containing multiple RRM (RNA recognition motif) domains. The gene product is annotated with RNA binding and mRNA binding molecular functions, and is associated with regulation of RNA splicing, alternative mRNA splicing, translation, and mRNA processing. PTB1 has been directly linked to tuberization, tuber development, and tuber productivity in potato, and is also associated with tuber morphology and subterranean shoot axis tuber size. The protein localizes to the nucleus, cytoplasm, and P-bodies, and is connected to responses to sucrose, flowering, seed germination, and male gametophyte viability. Studies of related genes in other species link the family to pollen germination and alternative splicing.