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  Molecular basis of transcription-coupled pre-mRNA capping.

Martinez-Rucobo, F. W., Kohler, R., Waterbeemd, M. v. d., Heck, A. J., Hemann, M., Herzog, F., et al. (2015). Molecular basis of transcription-coupled pre-mRNA capping. Molecular Cell, 58(6), 1079-1089. doi:10.1016/j.molcel.2015.04.004.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0026-D001-0 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002A-51A9-1
Genre: Journal Article

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 Creators:
Martinez-Rucobo, F. W., Author
Kohler, R., Author
Waterbeemd, M. van de , Author
Heck, A. J., Author
Hemann, M., Author
Herzog, F., Author
Stark, H.1, Author              
Cramer, P.2, Author              
Affiliations:
1Research Group of 3D Electron Cryo-Microscopy, MPI for biophysical chemistry, Max Planck Society, ou_578577              
2Department of Molecular Biology, MPI for Biophysical Chemistry, Max Planck Society, ou_1863498              

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 Abstract: Capping is the first step in pre-mRNA processing, and the resulting 5′-RNA cap is required for mRNA splicing, export, translation, and stability. Capping is functionally coupled to transcription by RNA polymerase (Pol) II, but the coupling mechanism remains unclear. We show that efficient binding of the capping enzyme (CE) to transcribing, phosphorylated yeast Pol II (Pol IIp) requires nascent RNA with an unprocessed 5′-triphosphate end. The transcribing Pol IIp-CE complex catalyzes the first two steps of capping, and its analysis by mass spectrometry, cryo-electron microscopy, and protein crosslinking revealed the molecular basis for transcription-coupled pre-mRNA capping. CE docks to the Pol II wall and spans the end of the RNA exit tunnel to position the CE active sites for sequential binding of the exiting RNA 5′ end. Thus, the RNA 5′ end triggers its own capping when it emerges from Pol II, to ensure seamless RNA protection from 5′-exonucleases during early transcription.

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Language(s): eng - English
 Dates: 2015-05-072015-06-18
 Publication Status: Published in print
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 Rev. Method: Peer
 Identifiers: DOI: 10.1016/j.molcel.2015.04.004
PMID: 25959396
 Degree: -

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Title: Molecular Cell
Source Genre: Journal
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Pages: - Volume / Issue: 58 (6) Sequence Number: - Start / End Page: 1079 - 1089 Identifier: -