NMR Structure of RRM1 from Human Polypyrimidine Tract Binding Protein Isoform 1 (PTB1)

Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 50 
  • Conformers Submitted: 16 
  • Selection Criteria: structures with lowest energy 

wwPDB Validation   3D Report Full Report

This is version 1.4 of the entry. See complete history


Structure and RNA Interactions of the N-Terminal RRM Domains of PTB

Simpson, P.J.Monie, T.P.Szendroi, A.Davydova, N.Tyzack, J.K.Conte, M.R.Read, C.M.Cary, P.D.Svergun, D.I.Konarev, P.V.Curry, S.Matthews, S.J.

(2004) Structure 12: 1631-1643

  • DOI: https://doi.org/10.1016/j.str.2004.07.008
  • Primary Citation of Related Structures:  
    1SJQ, 1SJR

  • PubMed Abstract: 

    The polypyrimidine tract binding protein (PTB) is an important regulator of alternative splicing that also affects mRNA localization, stabilization, polyadenylation, and translation. NMR structural analysis of the N-terminal half of PTB (residues 55-301) shows a canonical structure for RRM1 but reveals novel extensions to the beta strands and C terminus of RRM2 that significantly modify the beta sheet RNA binding surface. Although PTB contains four RNA recognition motifs (RRMs), it is widely held that only RRMs 3 and 4 are involved in RNA binding and that RRM2 mediates homodimerization. However, we show here not only that the RRMs 1 and 2 contribute substantially to RNA binding but also that full-length PTB is monomeric, with an elongated structure determined by X-ray solution scattering that is consistent with a linear arrangement of the constituent RRMs. These new insights into the structure and RNA binding properties of PTB suggest revised models of its mechanism of action.

  • Organizational Affiliation

    Department of Biological Sciences, Imperial College, South Kensington Campus, Exhibition Road, London SW7 2AZ, UK.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Polypyrimidine tract-binding protein 1105Homo sapiensMutation(s): 0 
Gene Names: PTBP1PTB
UniProt & NIH Common Fund Data Resources
Find proteins for P26599 (Homo sapiens)
Explore P26599 
Go to UniProtKB:  P26599
GTEx:  ENSG00000011304 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP26599
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 50 
  • Conformers Submitted: 16 
  • Selection Criteria: structures with lowest energy 

Structure Validation

View Full Validation Report

Entry History 

Revision History  (Full details and data files)

  • Version 1.0: 2004-09-14
    Type: Initial release
  • Version 1.1: 2008-04-29
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2022-03-02
    Changes: Data collection, Database references, Derived calculations
  • Version 1.4: 2024-05-22
    Changes: Data collection