Phylogenetic inference places A0A1S3Y076 in the same PANTHER family (PTHR13547) as experimentally characterized PRORP proteins from Arabidopsis, Drosophila, and human, supporting RNase P activity and tRNA 5-prime leader removal.

Automated pipeline correctly identifies ribonuclease P activity and tRNA 5-prime leader removal based on ARBA rules, EC number, and PANTHER family.

PRORP enzymes are protein-only RNase P endonucleases that have completely replaced ribonucleoprotein RNase P in land plants. They catalyze Mg2+-dependent endonucleolytic cleavage of 5-prime leader sequences from pre-tRNAs using a conserved NYN metallonuclease domain. In Arabidopsis, PRORP1 is dual-targeted to chloroplasts and mitochondria, while PRORP2 and PRORP3 are nuclear.

The protein adopts a V-shaped architecture with N-terminal PPR repeats for tRNA substrate recognition, a central zinc-binding domain, and the C-terminal catalytic NYN domain. Loss of organellar PRORP1 in Arabidopsis is embryo-lethal.