NMR structure of SRA1p C-terminal domain

Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 30 
  • Conformers Submitted: 15 
  • Selection Criteria: structures with the lowest energy 

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This is version 1.3 of the entry. See complete history


The C-Terminal Domain of SRA1p Has a Fold More Similar to PRP18 than to an RRM and Does Not Directly Bind to the SRA1 RNA STR7 Region.

Bilinovich, S.M.Davis, C.M.Morris, D.L.Ray, L.A.Prokop, J.W.Buchan, G.J.Leeper, T.C.

(2014) J Mol Biol 426: 1753-1765

  • DOI: https://doi.org/10.1016/j.jmb.2014.01.007
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Steroid receptor activator RNA protein (SRA1p) is the translation product of the bi-functional long non-coding RNA steroid receptor activator RNA 1 (SRA1) that is part of the steroid receptor coactivator-1 acetyltransferase complex and is indicated to be an epigenetic regulatory component. Previously, the SRA1p protein was suggested to contain an RNA recognition motif (RRM) domain. We have determined the solution structure of the C-terminal domain of human SRA1p by NMR spectroscopy. Our structure along with sequence comparisons among SRA1p orthologs and against authentic RRM proteins indicates that it is not an RRM domain but rather an all-helical protein with a fold more similar to the PRP18 splicing factor. NMR spectroscopy on the full SRA1p protein suggests that this structure is relevant to the native full-length context. Furthermore, molecular modeling indicates that this fold is well conserved among vertebrates. Amino acid variations in this protein seen across sequenced human genomes, including those in tumor cells, indicate that mutations that disrupt the fold occur vary rarely and highlight that its function is well conserved. SRA1p had previously been suggested to bind to the SRA1 RNA, but NMR spectra of SRA1p in the presence of its 80-nt RNA target suggest otherwise and indicate that this protein must be part of a multi-protein complex in order to recognize its proposed RNA recognition element.

  • Organizational Affiliation

    Department of Chemistry and Biochemistry, The University of Akron, Akron, OH 44325, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Steroid receptor RNA activator 1131Homo sapiensMutation(s): 0 
Gene Names: SRA1PP7684
UniProt & NIH Common Fund Data Resources
Find proteins for Q9HD15 (Homo sapiens)
Explore Q9HD15 
Go to UniProtKB:  Q9HD15
GTEx:  ENSG00000213523 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9HD15
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 30 
  • Conformers Submitted: 15 
  • 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: 2014-02-12
    Type: Initial release
  • Version 1.1: 2014-03-05
    Changes: Database references
  • Version 1.2: 2014-04-09
    Changes: Database references
  • Version 1.3: 2023-06-14
    Changes: Database references, Other