Organism
Bacillus subtilis (strain 168)
Function
Endonucleolytically cleaves the 5'-leader sequence of certain mRNAs. Endonuclease digestion by the RNase J1/J2 complex occurs at a different site and in some cases more efficiently than J1 or J2 alone. The exonuclease activity of the J1/J2 complex is highly processive on substrates longer than 5 nucleotides, on shorter substrates is distributive. Plays a role in mRNA maturation and stability. Appears to have a limited effect on 16S rRNA maturation, despite its similarity to RNase J1. This subunit alone has very poor 5'-3' exonuclease activity.
Similarity
Belongs to the metallo-beta-lactamase superfamily. RNA-metabolizing metallo-beta-lactamase-like family. Bacterial RNase J subfamily.
Sequence
MKKKNTENVRIIALGGVGEIGKNLYVIEIDSDIFVVDAGLMHPENEMLGIDVVIPDISYLIERADRVKAIFLTHGHDENIGGVFYLLNKLSVPVYGTKLTLALLREKLKQYGHNRKTDLREIHSKSVITFESTKVSFFRTIHSIPDSVGVSFKTSLGSIVCTGDFKFDQTPALNQTCDIGEIAKIGNSGVLALLSDSANAERPGYTPSEAAVSGEISDALYNSQNRVIIAVFASNINRIQQVIHAAAQNGRKIAVAGKNLQSVLQLARKLGYIEADDELFISVQDVKKYPKREVAIITAGSQGEPLAALTRMANKAHKQLNIEEGDTVVIASTPIPGQELIYSKTVDLLARAGAQVIFAQKRVHVSGHGSQEELKLMINLLKPKYLIPVNGEYRMQKAHSKIAEETGMKRSDIFLIEKGDVVEFRGQNVKIGDKVPYGNILIDGLGVGDIGNIVLRDRRLLSQDGILIVVITLDKQKKHLVSGPEIITRGFVYVRESEGLIVQATELVRSIVTEATETSNVEWSTLKQAMRDALNQFLYEKTKRKPMIIPIIMEV