1SJQ | pdb_00001sjq

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

• PDB DOI: https://doi.org/10.2210/pdb1SJQ/pdb
• BMRB: 6178

• Classification: RNA BINDING PROTEIN
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2004-03-04 Released: 2004-09-14 
• Deposition Author(s): 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., Petoukhov, M.V., Curry, S., Matthews, S.J.

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Experimental Data Snapshot

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

Literature

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

• PubMed: 15341728 
• DOI: https://doi.org/10.1016/j.str.2004.07.008
• Primary Citation 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.

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

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content 

• Total Structure Weight: 11.75 kDa 
• Atom Count: 686 
• Modeled Residue Count: 88 
• Deposited Residue Count: 105 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Polypyrimidine tract-binding protein 1	A	105	Homo sapiens	Mutation(s): 0  Gene Names: PTBP1, PTB
UniProt & NIH Common Fund Data Resources
Find proteins for P26599 (Homo sapiens) Explore P26599  Go to UniProtKB:  P26599
PHAROS:  P26599 GTEx:  ENSG00000011304

Experimental Data & Validation

Experimental Data

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

Structure Validation

Entry History 

Deposition Data

• Released Date: 2004-09-14 
Deposition Author(s): 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., Petoukhov, M.V., Curry, S., Matthews, S.J.

Revision History  

• 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