1PQN

dominant negative human hDim1 (hDim1 1-128)


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 120 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure, stability and function of hDim1 investigated by NMR, circular dichroism and mutational analysis

Zhang, Y.Z.Cheng, H.Gould, K.L.Golemis, E.A.Roder, H.

(2003) Biochemistry 42: 9609-9618

  • DOI: 10.1021/bi034486i

  • PubMed Abstract: 
  • The 142 amino acid Dim1p protein is a component of the U4/U6.U5 tri-snRNP complex required for pre-mRNA splicing and interacts with multiple splicing-associated proteins. To gain further insight into the structural basis of its function, we determine ...

    The 142 amino acid Dim1p protein is a component of the U4/U6.U5 tri-snRNP complex required for pre-mRNA splicing and interacts with multiple splicing-associated proteins. To gain further insight into the structural basis of its function, we determined the solution structure of the reduced form of the dominant negative human hDim1 (hDim1(1)(-)(128)) using multidimensional NMR spectroscopy. This dominant negative hDim1 assumes a thioredoxin-like fold, confirming previous NMR and crystallographic results. However, in contrast to a recent crystal structure, the NMR solution structure for the reduced form of hDim1(1)(-)(128) presented here, along with thermodynamic data, indicates that the presence of a disulfide bond between Cys38 and Cys79 is structurally and functionally unimportant. Comparison of the truncated hDim1(1)(-)(128) with the full-length protein, using NMR and circular dichroism spectroscopy, indicates that the 14 C-terminal residues can undergo a local unfolding transition and assume alternative conformations, which appear to play a functional role. Other residues essential for hDim1 function are identified by using mutational and genetic approaches. The residues thus identified are not identical with those previously shown to govern Dim1 interaction with defined protein partners.


    Related Citations: 
    • The evolutionarily conserved Dim1 protein defines a novel branch of the thioredoxin fold superfamily
      ZHANG, Y.Z.,GOULD, K.L.,DUNBRACK JR., R.L.,CHENG, H.,RODER, H.,GOLEMIS, E.A.
      (1999) Physiol.Genomics 1: 109


    Organizational Affiliation

    Division of Basic Science, Fox Chase Cancer Center, Philadelphia, Pennsylvania 19111, USA. zhangy@iit.edu




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Spliceosomal U5 snRNP-specific 15 kDa protein
A
127Homo sapiensGene Names: TXNL4A (DIM1, TXNL4)
Find proteins for P83876 (Homo sapiens)
Go to Gene View: TXNL4A
Go to UniProtKB:  P83876
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 120 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 
  • Olderado: 1PQN Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-08-26
    Type: Initial release
  • Version 1.1: 2008-04-29
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance