Dynamic Interactions of Ntr1-Ntr2 with Prp43 and with U5 Govern the Recruitment of Prp43 To Mediate Spliceosome Disassembly
نویسندگان
چکیده
منابع مشابه
Regulation of Prp43-mediated disassembly of spliceosomes by its cofactors Ntr1 and Ntr2
The DEAH-box NTPase Prp43 disassembles spliceosomes in co-operation with the cofactors Ntr1/Spp382 and Ntr2, forming the NTR complex. How Prp43 is regulated by its cofactors to discard selectively only intron-lariat spliceosomes (ILS) and defective spliceosomes and to prevent disassembly of earlier and properly assembled/wild-type spliceosomes remains unclear. First, we show that Ntr1΄s G-patch...
متن کاملPrp43: An RNA helicase-like factor involved in spliceosome disassembly.
The Saccharomyces cerevisiae genes PRP2, PRP16, and PRP22 encode pre-mRNA splicing factors that belong to the highly conserved "DEAH" family of putative RNA helicases. We previously identified two additional members of this family, JA1 and JA2. To investigate its biological function, we cloned the JA1 gene and generated alleles carrying mutations identical to those found in highly conserved reg...
متن کاملThe target of the DEAH-box NTP triphosphatase Prp43 in Saccharomyces cerevisiae spliceosomes is the U2 snRNP-intron interaction
The DEAH-box NTPase Prp43 and its cofactors Ntr1 and Ntr2 form the NTR complex and are required for disassembling intron-lariat spliceosomes (ILS) and defective earlier spliceosomes. However, the Prp43 binding site in the spliceosome and its target(s) are unknown. We show that Prp43 fused to Ntr1's G-patch motif (Prp43_Ntr1GP) is as efficient as the NTR in ILS disassembly, yielding identical di...
متن کاملNtr1 activates the Prp43 helicase to trigger release of lariat-intron from the spliceosome.
DEAD/H-box NTPases remodel the spliceosome at multiple steps during the pre-mRNA splicing cycle. The RNA-dependent NTPase Prp43 catalyzes dissociation of excised lariat-intron from the spliceosome, but it is unclear how Prp43 couples the energy of ATP hydrolysis to intron release. Here, we report that activation of Prp43's inherently feeble helicase activity by the splicing factor Ntr1 is requi...
متن کاملTFIP11 Interacts with mDEAH9, an RNA Helicase Involved in Spliceosome Disassembly
Yeast proteins Ntr1, Ntr2 and Prp43 function in spliceosome disassembly. An Ntr1-Ntr2 protein complex recruits Prp43 to allow the removal of the lariat-intron in late-stage RNA splicing activity. Based on amino-acid sequence similarities across species, TFIP11 and mDEAH9/Dhx15 have been identified as homologues of yeast Ntr1 and Prp43, respectively. The N-terminal region of TFIP11 contains a G-...
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ژورنال
عنوان ژورنال: Molecular and Cellular Biology
سال: 2007
ISSN: 0270-7306,1098-5549
DOI: 10.1128/mcb.01213-07