1MP1

Solution structure of the PWI motif from SRm160


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation   3D Report Full Report


This is version 1.4 of the entry. See complete history


Literature

Structure and function of the PWI motif: a novel nucleic acid-binding domain that facilitates pre-mRNA processing.

Szymczyna, B.R.Bowman, J.McCracken, S.Pineda-Lucena, A.Lu, Y.Cox, B.Lambermon, M.Graveley, B.R.Arrowsmith, C.H.Blencowe, B.J.

(2003) Genes Dev 17: 461-475

  • DOI: https://doi.org/10.1101/gad.1060403
  • Primary Citation of Related Structures:  
    1MP1

  • PubMed Abstract: 

    The PWI motif is a highly conserved domain of unknown function in the SRm160 splicing and 3'-end cleavage-stimulatory factor, as well as in several other known or putative pre-mRNA processing components. We show here that the PWI motif is a new type of RNA/DNA-binding domain that has an equal preference for single- and double-stranded nucleic acids. Deletion of the motif prevents SRm160 from binding RNA and stimulating 3'-end cleavage, and its substitution with a heterologous RNA-binding domain restores these functions. The NMR solution structure of the SRm160-PWI motif reveals a novel, four-helix bundle and represents the first example of an alpha-helical fold that can bind single-stranded (ss)RNA. Structure-guided mutagenesis indicates that the same surface is involved in RNA and DNA binding and requires the cooperative action of a highly conserved, adjacent basic region. Thus, the PWI motif is a novel type of nucleic acid-binding domain that likely has multiple important functions in pre-mRNA processing, including SRm160-dependent stimulation of 3'-end formation.


  • Organizational Affiliation

    Ontario Cancer Institute, University of Toronto, Toronto, Ontario, Canada M5G 2M9.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Ser/Arg-related nuclear matrix protein111Homo sapiensMutation(s): 0 
Gene Names: SRm160
UniProt & NIH Common Fund Data Resources
Find proteins for Q8IYB3 (Homo sapiens)
Explore Q8IYB3 
Go to UniProtKB:  Q8IYB3
PHAROS:  Q8IYB3
GTEx:  ENSG00000133226 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ8IYB3
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2003-09-16
    Type: Initial release
  • Version 1.1: 2008-04-28
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2022-02-23
    Changes: Database references, Derived calculations
  • Version 1.4: 2024-05-22
    Changes: Data collection