Solution Structure of RNA-binding protein 15.5K

Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: target function 

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This is version 1.3 of the entry. See complete history


Functional Implications for a Prototypical K-Turn Binding Protein from Structural and Dynamical Studies of 15.5K

Soss, S.E.Flynn, P.F.

(2007) Biochemistry 46: 14979-14986

  • DOI: https://doi.org/10.1021/bi701254q
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    The kink-turn (K-turn) motif is recognized and bound by a family of proteins that act as nucleation factors for ribonucleoparticle assembly. The binding of various proteins to a conserved RNA structural motif known as the K-turn has been shown to be an important component of regulation in the ribosome, in the spliceosome, and in RNA modification. 15.5K is a prototypical example of a K-turn binding protein, which has been shown to bind the 5'-U4 stem-loop of the spliceosome and the box C/D motif. We describe the solution NMR structure of free 15.5K, as well as studies of conformational flexibility from 15N NMR relaxation and H/D exchange experiments. The protein appears well-structured aside from conformational fluctuation in alpha3. Flexibility in fast time scale motions and the observation of limited intermediate and slow motions further characterize the free protein and may suggest local contributions to recognition and binding.

  • Organizational Affiliation

    Department of Chemistry, University of Utah, Salt Lake City, Utah 84112, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
NHP2-like protein 1144Homo sapiensMutation(s): 0 
Gene Names: NHP2L1
UniProt & NIH Common Fund Data Resources
Find proteins for P55769 (Homo sapiens)
Explore P55769 
Go to UniProtKB:  P55769
PHAROS:  P55769
GTEx:  ENSG00000100138 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP55769
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: target function 

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2007-12-18
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2022-03-09
    Changes: Data collection, Database references, Derived calculations
  • Version 1.3: 2023-12-20
    Changes: Data collection, Other