2NCP

NMR solution structure for the C-terminal domain of Tetrahymena Tcb2 in the presence of calcium


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: target function 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Solution NMR structures of the C-domain of Tetrahymena cytoskeletal protein Tcb2 reveal distinct calcium-induced structural rearrangements.

Kilpatrick, A.M.Honts, J.E.Sleister, H.M.Fowler, C.A.

(2016) Proteins 84: 1748-1756

  • DOI: 10.1002/prot.25111
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Tcb2 is a calcium-binding protein that localizes to the membrane-associated skeleton of the ciliated protozoan Tetrahymena thermophila with hypothesized roles in ciliary movement, cell cortex signaling, and pronuclear exchange. Tcb2 has also been imp ...

    Tcb2 is a calcium-binding protein that localizes to the membrane-associated skeleton of the ciliated protozoan Tetrahymena thermophila with hypothesized roles in ciliary movement, cell cortex signaling, and pronuclear exchange. Tcb2 has also been implicated in a unique calcium-triggered, ATP-independent type of contractility exhibited by filamentous networks isolated from the Tetrahymena cytoskeleton. To gain insight into Tcb2's structure-function relationship and contractile properties, we determined solution NMR structures of its C-terminal domain in the calcium-free and calcium-bound states. The overall architecture is similar to other calcium-binding proteins, with paired EF-hand calcium-binding motifs. Comparison of the two structures reveals that Tcb2-C's calcium-induced conformational transition differs from the prototypical calcium sensor calmodulin, suggesting that the two proteins play distinct functional roles in Tetrahymena and likely have different mechanisms of target recognition. Future studies of the full-length protein and the identification of Tcb2 cellular targets will help establish the molecular basis of Tcb2 function and its unique contractile properties. Proteins 2016; 84:1748-1756. © 2016 Wiley Periodicals, Inc.


    Related Citations: 
    • Backbone and side-chain chemical shift assignments for the C-terminal domain of Tcb2, a cytoskeletal calcium-binding protein from Tetrahymena thermophila.
      Kilpatrick, A.M.,Gurrola, T.E.,Sterner, R.C.,Sleister, H.M.,Honts, J.E.,Fowler, C.A.
      (2016) Biomol.Nmr Assign. --: --


    Organizational Affiliation

    Department of Physics and Astronomy, Drake University, Des Moines, Iowa, 50311. adina.kilpatrick@drake.edu.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
25 kDa calcium-binding protein
A
102Tetrahymena thermophilaMutation(s): 0 
Find proteins for P09226 (Tetrahymena thermophila)
Go to UniProtKB:  P09226
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: target function 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2016-08-17
    Type: Initial release
  • Version 1.1: 2016-11-02
    Type: Database references