1Z09

Solution structure of km23


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 10 
  • Selection Criteria: structures with the least restraint violations, structures with the lowest energy 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure and Dynamics of the Homodimeric Dynein Light Chain km23.

Ilangovan, U.Ding, W.Zhong, Y.Wilson, C.L.Groppe, J.C.Trbovich, J.T.Zuniga, J.Demeler, B.Tang, Q.Gao, G.Mulder, K.M.Hinck, A.P.

(2005) J.Mol.Biol. 352 (2): 338-354

  • DOI: 10.1016/j.jmb.2005.07.002

  • PubMed Abstract: 
  • km23 (96 residues, 11 kDa) is the mammalian ortholog of Drosophila roadblock, the founding member of LC7/robl/km23 class of dynein light chains. km23 has been shown to be serine-phosphorylated following TGFbeta receptor activation and to bind the dyn ...

    km23 (96 residues, 11 kDa) is the mammalian ortholog of Drosophila roadblock, the founding member of LC7/robl/km23 class of dynein light chains. km23 has been shown to be serine-phosphorylated following TGFbeta receptor activation and to bind the dynein intermediate chain in response to such phosphorylation. Here, we report the three-dimensional solution structure of km23, which is shown to be that of a homodimer, similar to that observed for the heterodimeric complex formed between p14 and MP1, two distantly related members of the MglB/robl superfamily, but distinct from the LC8 and Tctex-1 classes of dynein light chains, which also adopt homodimeric structures. The conserved surface residues of km23, including three serine residues, are located predominantly on a single face of the molecule. Adjacent to this face is a large cleft formed by the incomplete overlap of loops from opposite monomers. As shown by NMR relaxation data collected at two fields, several cleft residues are flexible on the ns-ps and ms-mus timescales. Based on these observations, we propose that the patch of conserved residues on the central face of the molecule corresponds to the site at which km23 binds the dynein intermediate chain and that the flexible cleft formed between the overlap of loops from the two monomers corresponds to the site at which km23 binds other partners, such as the TGFbeta type II receptor or Smad2.


    Organizational Affiliation

    Department of Biochemistry, University of Texas Health Science Center at San Antonio, San Antonio, TX 78229, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Dynein light chain 2A, cytoplasmic
A, B
96Homo sapiensMutation(s): 0 
Gene Names: DYNLRB1 (BITH, DNCL2A, DNLC2A, ROBLD1)
Find proteins for Q9NP97 (Homo sapiens)
Go to Gene View: DYNLRB1
Go to UniProtKB:  Q9NP97
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 10 
  • Selection Criteria: structures with the least restraint violations, structures with the lowest energy 
  • Olderado: 1Z09 Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2005-08-02
    Type: Initial release
  • Version 1.1: 2008-04-30
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance