PP — Asparagus officinalis

Summary

AoPP (A4U43_C03F26150) on asparagus chromosome 3 encodes a poly(ADP-ribose) polymerase (PARP) family protein with NAD+-protein-aspartate/glutamate ADP-ribosyltransferase, poly(ADP-ribose) glycohydrolase, and nucleotidyltransferase activities, and binds DNA, RNA, NAD, and zinc. The gene is associated with DNA ADP-ribosylation, double-strand break repair via NHEJ, chromosome condensation, rRNA processing, and responses to oxidative stress, heat, abscisic acid, osmotic stress, and fungal defence. It is linked to traits including flowering time, flower morphology, root thickness, stomatal closure, jasmonic acid content, salt tolerance, disease tolerance, water use efficiency, and circadian rhythm. The protein localises to the nucleus, nucleolus, and mitochondria. Studies of related genes in other species connect the PARP family to DNA damage repair, seed storability, basal defence, and abiotic stress resistance.