1K1G

STRUCTURAL BASIS FOR RECOGNITION OF THE INTRON BRANCH SITE RNA BY SPLICING FACTOR 1


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 10 
  • Selection Criteria: 10 lowest energy structures consistent with experimental distance and dihedral angle restraints 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structural basis for recognition of the intron branch site RNA by splicing factor 1.

Liu, Z.Luyten, I.Bottomley, M.J.Messias, A.C.Houngninou-Molango, S.Sprangers, R.Zanier, K.Kramer, A.Sattler, M.

(2001) Science 294: 1098-1102

  • DOI: 10.1126/science.1064719
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • During spliceosome assembly, splicing factor 1 (SF1) specifically recognizes the intron branch point sequence (BPS) UACUAAC in the pre-mRNA transcripts. We show that the KH-QUA2 region of SF1 defines an enlarged KH (hn RNP K) fold which is necessary ...

    During spliceosome assembly, splicing factor 1 (SF1) specifically recognizes the intron branch point sequence (BPS) UACUAAC in the pre-mRNA transcripts. We show that the KH-QUA2 region of SF1 defines an enlarged KH (hn RNP K) fold which is necessary and sufficient for BPS binding. The 3' part of the BPS (UAAC), including the conserved branch point adenosine (underlined), is specifically recognized in a hydrophobic cleft formed by the Gly-Pro-Arg-Gly motif and the variable loop of the KH domain. The QUA2 region recognizes the 5' nucleotides of the BPS (ACU). The branch point adenosine acting as the nucleophile in the first biochemical step of splicing is deeply buried. BPS RNA recognition suggests how SF1 may facilitate subsequent formation of the prespliceosomal complex A.


    Organizational Affiliation

    European Molecular Biology Laboratory (EMBL), Meyerhofstrasse 1, D-69117 Heidelberg, Germany.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
SF1-Bo isoformA131Homo sapiensMutation(s): 0 
Gene Names: SF1ZFM1ZNF162
Find proteins for Q15637 (Homo sapiens)
Explore Q15637 
Go to UniProtKB:  Q15637
NIH Common Fund Data Resources
PHAROS  Q15637
Protein Feature View
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  • Reference Sequence
  • Find similar nucleic acids by: Sequence   |   Structure
Entity ID: 1
MoleculeChainsLengthOrganism
5'-R(*UP*AP*UP*AP*CP*UP*AP*AP*CP*AP*A)-3'B11N/A
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 10 
  • Selection Criteria: 10 lowest energy structures consistent with experimental distance and dihedral angle restraints 
  • OLDERADO: 1K1G Olderado

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2001-11-07
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance