U7 snRNP:ZFP100 Complex Capped Intronless Histone pre-mRNA:CBP80:CBP20:SLBP Capped Intronless Histone pre-mRNA:CBP80:CBP20:SLBP:ZFP100 Complex Recruitment of U7 snRNP:ZFP100 complex to the SLBP Bound Pre-mRNA Authored: Gillespie, ME, 2004-03-13 15:04:49 GENE ONTOLOGYGO:0008334 Pubmed3022153 Reactome Database ID Release 4377585 Reactome, http://www.reactome.org ReactomeREACT_967 The U7 snRNP. This particle contains the U7 snRNA, the smallest of the snRNAs which varies from 57-70 nts long depending on the species. The 5’ end of U7 snRNA binds to a sequence 3’ of the stemloop, termed the histone downstream element (HDE). There are a number of proteins found in the U7 snRNP. There are 7 Sm proteins, as are present in the spliceosomal snRNP. Five of these proteins are the same as ones found in the spliceosomal snRNPs and there are 2, Lsm10 and Lsm11 that are unique to U7 snRNP. A third protein joins the U7 snRNP, ZFP100, a large zinc finger protein. ZFP100 interacts with SLBP bound to the histone pre-mRNA and with Lsm11 and likely plays a critical role in recruiting U7 snRNP to the histone pre-mRNA.