(EN) The present invention provides novel human small nuclear ribonucleoprotein (snRNP) Sm proteins (collectively called HSMP) and polynucleotides which identify and encode HSMP. The invention also provides genetically engineered expression vectors and host cells comprising the nucleic acid sequences encoding HSMP. The invention also provides pharmaceutical compositions containing HSMP or antagonists to HSMP, and in the use of these compositions for the treatment of diseases associated with the expression of HSMP. Additionally, the invention provides for the use of antisense molecules to polynucleotides encoding HSMP for the treatment of diseases associated with the expression of HSMP. The invention also provides diagnostic assays which utilize the polynucleotide, or fragments or the complement thereof, to hybridize to the genomic sequence or transcripts of polynucleotides encoding HSMP or anti-HSMP antibodies which specifically bind to HSMP.