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  Structural and functional analysis of the human spliceosomal DEAD-box helicase Prp28.

Möhlmann, S., Mathew, R., Neumann, P., Schmitt, A., Lührmann, R., & Ficner, R. (2014). Structural and functional analysis of the human spliceosomal DEAD-box helicase Prp28. Acta Crystallographica D, 70(6), 1622-1630. doi:10.1107/S1399004714006439.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0019-F5F1-1 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0027-CCB5-1
Genre: Journal Article

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 Creators:
Möhlmann, S., Author
Mathew, R.1, Author              
Neumann, P., Author
Schmitt, A., Author
Lührmann, R.1, Author              
Ficner, R., Author
Affiliations:
1Department of Cellular Biochemistry, MPI for biophysical chemistry, Max Planck Society, ou_578576              

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Free keywords: Prp28;DEAD-box proteins; helicase domain
 Abstract: The DEAD-box protein Prp28 is essential for pre-mRNA splicing as it plays a key role in the formation of an active spliceosome. Prp28 participates in the release of the U1 snRNP from the 5'-splice site during association of the U5.U4/U6 tri-snRNP, which is a crucial step in the transition from a pre-catalytic spliceosome to an activated spliceosome. Here, it is demonstrated that the purified helicase domain of human Prp28 (hPrp28 Delta N) binds ADP, whereas binding of ATP and ATPase activity could not be detected. ATP binding could not be observed for purified full-length hPrp28 either, but within an assembled spliceosomal complex hPrp28 gains ATP-binding activity. In order to understand the structural basis for the ATP-binding deficiency of isolated hPrp28, the crystal structure of hPrp28 Delta N was determined at 2.0 angstrom resolution. In the crystal the helicase domain adopts a wide-open conformation, as the two RecA-like domains are extraordinarily displaced from the productive ATPase conformation. Binding of ATP is hindered by a closed conformation of the P-loop, which occupies the space required for the gamma-phosphate of ATP.

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Language(s): eng - English
 Dates: 2014-05-242014-06
 Publication Status: Published in print
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 Rev. Method: Peer
 Identifiers: DOI: 10.1107/S1399004714006439
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Title: Acta Crystallographica D
Source Genre: Journal
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Pages: - Volume / Issue: 70 (6) Sequence Number: - Start / End Page: 1622 - 1630 Identifier: -