Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
9
pubmed:dateCreated
1995-6-14
pubmed:databankReference
pubmed:abstractText
Several small nuclear RNAs (snRNAs), including the spliceosomal U1, U2, U4 and U5 snRNAs, are associated with Sm proteins. These eight small proteins form a heteromeric complex that binds to snRNAs and plays a major role in small nuclear ribonucleoprotein (snRNP) biogenesis and transport. These proteins are also a major target for autoantibodies in the human disease systemic lupus erythematosus. By sequence comparison I have shown that all the known Sm proteins share a common structural motif which might explain their immunological cross-reactivity. Database searches using this motif uncovered a large number of Sm-like proteins from plants, animals and fungi. These proteins have been grouped in at least 13 different subfamilies. Genes encoding divergent yeast members were cloned and used to produce tagged fusion proteins. Some of these proteins are canonical Sm proteins as they associate with the yeast U1, U2, U4/U6 and U5 snRNAs. Surprisingly, one Sm-like protein was found to be a component of the U6 snRNP. These findings have implications for the structure of the Sm protein complex, spliceosomal snRNP evolution, snRNA transport and modification as well as the involvement of Sm proteins in systemic lupus erythematosus.
pubmed:commentsCorrections
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pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
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