PTI1

Summary

Gene Symbol: PTI1
Description: cleavage polyadenylation factor subunit PTI1
Alias: cleavage polyadenylation factor subunit PTI1
Species: Saccharomyces cerevisiae S288c

Top Publications

  1. He X, Moore C. Regulation of yeast mRNA 3' end processing by phosphorylation. Mol Cell. 2005;19:619-29 pubmed
    ..These results support a model in which poly(A) synthesis is controlled by cycles of phosphorylation and dephosphorylation that require the action of Glc7. ..
  2. Nedea E, He X, Kim M, Pootoolal J, Zhong G, Canadien V, et al. Organization and function of APT, a subcomplex of the yeast cleavage and polyadenylation factor involved in the formation of mRNA and small nucleolar RNA 3'-ends. J Biol Chem. 2003;278:33000-10 pubmed
    ..The latter can form a distinct complex, APT, in which Pti1, Swd2, a type I protein phosphatase (Glc7), Ssu72 (a TFIIB and RNA polymerase II-associated factor), Ref2, and Syc1 ..
  3. Nedea E, Nalbant D, Xia D, Theoharis N, Suter B, Richardson C, et al. The Glc7 phosphatase subunit of the cleavage and polyadenylation factor is essential for transcription termination on snoRNA genes. Mol Cell. 2008;29:577-87 pubmed publisher
    ..Swd2 is also a subunit of the Set1c histone H3K4 methyltransferase complex and is required for its stability and optimal methyltransferase activity. ..
  4. Dichtl B, Blank D, Ohnacker M, Friedlein A, Roeder D, Langen H, et al. A role for SSU72 in balancing RNA polymerase II transcription elongation and termination. Mol Cell. 2002;10:1139-50 pubmed
    ..The sum of our analyses suggests a negative influence of Ssu72p on RNAP II during transcription that affects the commitment to either elongation or termination. ..
  5. He X, Khan A, Cheng H, Pappas D, Hampsey M, Moore C. Functional interactions between the transcription and mRNA 3' end processing machineries mediated by Ssu72 and Sub1. Genes Dev. 2003;17:1030-42 pubmed
  6. Ghazy M, He X, Singh B, Hampsey M, Moore C. The essential N terminus of the Pta1 scaffold protein is required for snoRNA transcription termination and Ssu72 function but is dispensable for pre-mRNA 3'-end processing. Mol Cell Biol. 2009;29:2296-307 pubmed publisher
    ..Furthermore, different regions of Pta1 interact with the CPF subunits Ssu72, Pti1, and Ysh1, supporting the idea that Pta1 acts as a scaffold to organize CPF...
  7. Schreieck A, Easter A, Etzold S, Wiederhold K, Lidschreiber M, Cramer P, et al. RNA polymerase II termination involves C-terminal-domain tyrosine dephosphorylation by CPF subunit Glc7. Nat Struct Mol Biol. 2014;21:175-179 pubmed publisher
    ..These results show that transcription termination involves Tyr1 dephosphorylation of the CTD and indicate that pre-mRNA processing by CPF and transcription termination are coupled via Glc7-dependent Pol II-Tyr1 dephosphorylation. ..
  8. Lee S, Moore C. Efficient mRNA polyadenylation requires a ubiquitin-like domain, a zinc knuckle, and a RING finger domain, all contained in the Mpe1 protein. Mol Cell Biol. 2014;34:3955-67 pubmed publisher
    ..Furthermore, an inhibitor of ubiquitin-mediated interactions blocks cleavage, demonstrating for the first time a direct role for ubiquitination in mRNA 3'-end processing. ..
  9. Skaar D, Greenleaf A. The RNA polymerase II CTD kinase CTDK-I affects pre-mRNA 3' cleavage/polyadenylation through the processing component Pti1p. Mol Cell. 2002;10:1429-39 pubmed
    ..of loss of yeast CTD kinase I (CTDK-I) function (by deletion of the catalytic subunit gene CTK1) identified PTI1, a potential 3' cleavage/polyadenylation factor...

More Information

Publications12

  1. Dheur S, Vo L, Voisinet Hakil F, Minet M, Schmitter J, Lacroute F, et al. Pti1p and Ref2p found in association with the mRNA 3' end formation complex direct snoRNA maturation. EMBO J. 2003;22:2831-40 pubmed
    ..We also provide evidence that Pti1p probably acts by uncoupling cleavage and polyadenylation, and functions in coordination with the Nrd1p-dependent pathway for 3' end formation of non-polyadenylated transcripts. ..
  2. Zhang D, Mosley A, Ramisetty S, Rodríguez Molina J, Washburn M, Ansari A. Ssu72 phosphatase-dependent erasure of phospho-Ser7 marks on the RNA polymerase II C-terminal domain is essential for viability and transcription termination. J Biol Chem. 2012;287:8541-51 pubmed publisher
    ..An inability to remove these marks prevents Pol II from terminating efficiently and will likely impede subsequent assembly into the pre-initiation complex. ..
  3. Blair L, Liu Z, Labitigan R, Wu L, Zheng D, Xia Z, et al. KDM5 lysine demethylases are involved in maintenance of 3'UTR length. Sci Adv. 2016;2:e1501662 pubmed publisher
    ..In contrast, both KDM5A and KDM5B are involved in the lengthening of DICER1. Our findings suggest both a novel role for this family of demethylases and a novel targetable mechanism for 3'UTR processing. ..