Sm and Sm-like (LSm) proteinsform donutshaped heptamericcomplexesthat are involved in varioussteps of RNAmetabolism.LSmproteinsfacilitate RNA protein interactions and structuralchangesthat are required during ribosomalsubunit assembly. The U6 snRNA-associated Sm-like protein LSm2 is also known assmall nuclear ribonucleoprotein D homolog SNP3.
