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The Saccharomyces cerevisiae SR protein Npl3 interacts with hyperphosphorylated CTD of RNA Polymerase IIстатья Исследовательская статья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
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Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 15 февраля 2024 г.
- Авторы: Gupta A., Kumar A., Singh N., Sudarshan N., Studitsky V.M., Zhang K.Y.J, Akhtar M.S.
- Журнал: International Journal of Biological Macromolecules
- Том: 253
- Номер: 7
- Год издания: 2023
- Издательство: Elsevier BV
- Местоположение издательства: Netherlands
- Номер статьи: 127541
- DOI: 10.1016/j.ijbiomac.2023.127541
- Аннотация: The catalytic subunit of RNA Polymerase II contains a highly conserved carboxy terminal domain (CTD) composed of multiple tandem heptad sequence Tyr1Ser2Pro3Thr4Ser5Pro6Ser7. The non-proline residues in CTD undergo posttranslational modifications, with Ser5 phosphorylation (Ser5P) predominating at the start of the transcription cycle and Ser2P at the end, while other phosphorylation levels are high all throughout. The differentially phosphorylated CTD is recognized by regulatory proteins, helpful during mRNA transcription and export. One such protein Npl3 is composed of two RNA binding domains and a C-terminus RGG/SR domain. The Ser411 of Npl3 is reported to make direct contact with Ser2P of CTD for its recruitment and function, while the Npl3 lacking of C-terminal 25 amino acids (Npl3Δ389-414) showed no apparent defects in mRNA synthesis. Here, we report that the RNA binding domains of Npl3 are separate folding units and interact also with the CTD. The interaction between Npl3 and CTD appears to involve not just Ser2P, but also the Ser5P and Ser7P. The Arg126 of the first RNA binding domain interacts with Ser2P whereas the Arg235 of the second RNA binding domain interacts with either Ser7P or Ser5P of another heptad. The finding provides new insight of Npl3 function for mRNA transcription.
- Добавил в систему: Студитский Василий Михайлович