1FHT

RNA-BINDING DOMAIN OF THE U1A SPLICEOSOMAL PROTEIN U1A117, NMR, 43 STRUCTURES


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Submitted: 43 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Solution structure of the N-terminal RNP domain of U1A protein: the role of C-terminal residues in structure stability and RNA binding.

Avis, J.M.Allain, F.H.Howe, P.W.Varani, G.Nagai, K.Neuhaus, D.

(1996) J Mol Biol 257: 398-411

  • DOI: 10.1006/jmbi.1996.0171
  • Primary Citation of Related Structures:  
    1FHT

  • PubMed Abstract: 
  • The solution structure of a fragment of the human U1A spliceosomal protein containing residues 2 to 117 (U1A117) determined using multi-dimensional heteronuclear NMR is presented. The C-terminal region of the molecule is considerably more ordered in ...

    The solution structure of a fragment of the human U1A spliceosomal protein containing residues 2 to 117 (U1A117) determined using multi-dimensional heteronuclear NMR is presented. The C-terminal region of the molecule is considerably more ordered in the free protein than thought previously and its conformation is different from that seen in the crystal structure of the complex with U1 RNA hairpin II. The residues between Asp90 and Lys98 form an alpha-helix that lies across the beta-sheet, with residues IIe93, IIe94 and Met97 making contacts with Leu44, Phe56 and IIe58. This interaction prevents solvent exposure of hydrophobic residues on the surface of the beta-sheet, thereby stabilising the protein. Upon RNA binding, helix C moves away from this position, changing its orientation by 135 degrees to allow Tyr13, Phe56 and Gln54 to stack with bases of the RNA, and also allowing Leu44 to contact the RNA. The new position of helix C in the complex with RNA is stabilised by hydrophobic interactions from IIe93 and IIe94 to IIe58, Leu 41, Val62 and His 10, as well as a hydrogen bond between Ser91 and Thr11. The movement of helix C mainly involves changes in the main-chain torsion angles of Thr89, Asp90 and Ser91, the helix thereby acting as a "lid" over the RNA binding surface.


    Related Citations: 
    • Crystal Structure at 1.92 A Resolution of the RNA-Binding Domain of the U1A Spliceosomal Protein Complexed with an RNA Hairpin
      Oubridge, C., Ito, N., Evans, P.R., Teo, C.H., Nagai, K.
      (1994) Nature 372: 432
    • Crystal Structure of the RNA-Binding Domain of the U1 Small Nuclear Ribonucleoprotein A
      Nagai, K., Oubridge, C., Jessen, T.H., Li, J., Evans, P.R.
      (1990) Nature 348: 515

    Organizational Affiliation

    MRC Laboratory of Molecular Biology, Cambridge, UK.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
U1 SMALL NUCLEAR RIBONUCLEOPROTEIN AA116Homo sapiensMutation(s): 0 
Gene Names: HUMAN U1A 1-117SNRPA
Find proteins for P09012 (Homo sapiens)
Explore P09012 
Go to UniProtKB:  P09012
NIH Common Fund Data Resources
PHAROS  P09012
Protein Feature View
Expand
 ( Mouse scroll to zoom / Hold left click to move )
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Submitted: 43 
  • OLDERADO: 1FHT Olderado

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1996-07-11
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance