Structure-function relationships of the polypyrimidine tract binding protein

  • S. D. Auweter
  • F. H.-T. AllainEmail author


The polypyrimidine tract binding protein (PTB) is a 58-kDa RNA binding protein involved in multiple aspects of mRNA metabolism including splicing regulation, polyadenylation, 3′end formation, internal ribosomal entry site-mediated translation, RNA localization and stability. PTB contains four RNA recognition motifs (RRMs) separated by three linkers. In this review we summarize structural information on PTB in solution that has been gathered during the past 7 years using NMR spectroscopy and small-angle X-ray scattering. The structures of all RRMs of PTB in their free state and in complex with short pyrimidine tracts, as well as a structural model of PTB RRM2 in complex with a peptide, revealed unusual structural features that provided new insights into the mechanisms of action of PTB in the different processes of RNA metabolism and in particular splicing regulation.


Alternative splicing translation regulation polypyrimidine tract binding protein RNA-protein complex RNA-protein recognition RNA recognition motifs RBD splicing regulation 

Copyright information

© Birkhaueser 2007

Authors and Affiliations

  1. 1.Institute for Molecular Biology and BiophysicsETH ZürichZürichSwitzerland
  2. 2.Michael Smith LaboratoriesUniversity of British ColumbiaVancouverCanada

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