Protein
Mini-ribonuclease 3
Organism
Bacillus subtilis (strain 168)
Function
Involved in correct processing of both the 5' and 3' ends of 23S rRNA precursor. Processes 30S rRNA precursor transcript even in absence of ribonuclease 3 (Rnc); Rnc processes 30S rRNA into smaller rRNA precursors. Cleaves more efficiently on assembled 50S ribosomal subunits. Cleavage is strongly stimulated by ribosomal protein L3 (RplC); 20-30% DMSO can replace RplC, suggesting RplC may alter rRNA conformation.
Similarity
Belongs to the MrnC RNase family.
Sequence
MLEFDTIKDSKQLNGLALAYIGDAIFEVYVRHHLLKQGFTKPNDLHKKSSRIVSAKSQAEILFFLQNQSFFTEEEEAVLKRGRNAKSGTTPKNTDVQTYRYSTAFEALLGYLFLEKKEERLSQLVAEAIQFGTSGRKTNESAT