1U2A

STEM LOOP IIA FROM U2SNRNA OF SACCHAROMYCES CEREVISIAE, NMR, MINIMIZED AVERAGE STRUCTURE


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 15 
  • Conformers Submitted: 
  • Selection Criteria: NOE VIOLATIONS < 0.2A (NOT APPLIED TO PSEUDO-NOES IN THE TERMINAL BASE PAIR), DIHEDRAL VIOL < 2 DEGREES, RMSD BONDS < 0.02A, RMSD ANGLE < 2 DEGREES, RMSD IMPROPER < 2 DEGREES 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The structure of an essential splicing element: stem loop IIa from yeast U2 snRNA.

Stallings, S.C.Moore, P.B.

(1997) Structure 5: 1173-1185

  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Eukaryotic genes are usually transcribed as precursor mRNAs which are then spliced, removing introns to produce functional mRNAs. Splicing is performed by the spliceosome and provides an important level of post-translational control of gene expressio ...

    Eukaryotic genes are usually transcribed as precursor mRNAs which are then spliced, removing introns to produce functional mRNAs. Splicing is performed by the spliceosome and provides an important level of post-translational control of gene expression. Stem loop IIa from U2 small nuclear (sn)RNA is required for the efficient association of the U2 small nuclear ribonuclear protein (snRNP) with the nascent spliceosome in yeast. Genetic analysis suggests that stem loop IIa is involved in RNA-protein interactions early in splicing, and it may also interact with other RNA sequences in U2. The sequence of loop IIa is well conserved, consistent with the idea that this loop is important for function.


    Related Citations: 
    • Lethal and Temperature-Sensitive Mutations and Their Suppressors Identify an Essential Structural Element in U2 Small Nuclear RNA
      Ares Junior, M.,Igel, A.H.
      (1990) Genes Dev. 4: 2132
    • Efficient Association of U2 Snrnps with Pre-Mrna Requires an Essential U2 RNA Structural Element
      Zavanelli, M.I.,Ares Junior, M.
      (1991) Genes Dev. 5: 2521


    Organizational Affiliation

    Department of Chemistry, Yale University, New Haven, CT 06520-8107, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsLengthOrganism
RNA (5'-R(P*GP*GP*UP*CP*AP*GP*UP*GP*UP*AP*AP*CP*AP*AP*CP*UP*GP*AP*CP*C)-3')A20Saccharomyces cerevisiae
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 15 
  • Conformers Submitted: 
  • Selection Criteria: NOE VIOLATIONS < 0.2A (NOT APPLIED TO PSEUDO-NOES IN THE TERMINAL BASE PAIR), DIHEDRAL VIOL < 2 DEGREES, RMSD BONDS < 0.02A, RMSD ANGLE < 2 DEGREES, RMSD IMPROPER < 2 DEGREES 
Software Package:
Software NamePurpose
X-PLORphasing
X-PLORrefinement
X-PLORmodel building

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1998-03-04
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance