1R2U

NMR structure of the N domain of trout cardiac troponin C at 30 C


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 60 
  • Conformers Submitted: 40 
  • 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

Effect of temperature on the structure of trout troponin C

Blumenschein, T.M.Gillis, T.E.Tibbits, G.F.Sykes, B.D.

(2004) Biochemistry 43: 4955-4963

  • DOI: 10.1021/bi035504z
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Adaptation for life at different temperatures can cause changes in many aspects of an organism. One example is the expression of different protein isoforms in species adapted to different temperatures. The calcium regulatory protein cardiac troponin ...

    Adaptation for life at different temperatures can cause changes in many aspects of an organism. One example is the expression of different protein isoforms in species adapted to different temperatures. The calcium regulatory protein cardiac troponin C (cTnC), from rainbow trout (Oncorhynchus mykiss), is a good model for studying temperature effects, both because of its low physiological temperature and because mammalian cTnC, extensively studied at higher temperatures, can be used for comparison. We determined the structure and studied the backbone dynamics of the regulatory domain of trout cardiac troponin C (ScNTnC) with one Ca(2+) bound at 7 and 30 degrees C, using nuclear magnetic resonance spectroscopy (NMR). The overall fold of the regulatory domain of trout cTnC at both temperatures is similar to the regulatory domain of mammalian (human, bovine, and porcine isoform) cTnC bound to one Ca(2+). By comparing the trout structures at the two temperatures, we identify differences between the positions of the helices flanking the calcium binding loops, and the overall structure at 7 degrees C is more compact than that at 30 degrees C. The structure at 7 degrees C is more similar to the mammalian cTnC, which was determined at 30 degrees C, indicating that they have the same conformation at their respective physiological temperatures. The dynamic properties of the regulatory domain of trout cTnC are similar at the two temperatures that were used in these studies.


    Related Citations: 
    • Effect of temperature and the F27W mutation on the Ca2+ activated structural transition of trout cardiac troponin C
      Gillis, T.E., Blumenschein, T.M.A., Sykes, B.D., Tibbits, G.F.
      (2003) Biochemistry 42: 6418

    Organizational Affiliation

    CIHR Group in Structure and Function and Department of Biochemistry, University of Alberta, Edmonton, Alberta, Canada T6G 2H7.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
troponin CA89Oncorhynchus mykissMutation(s): 0 
Gene Names: GSONMT00056460001
Find proteins for Q7ZZB9 (Oncorhynchus mykiss)
Explore Q7ZZB9 
Go to UniProtKB:  Q7ZZB9
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA

Download CCD File 
A
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 60 
  • Conformers Submitted: 40 
  • Selection Criteria: structures with the lowest energy 
  • OLDERADO: 1R2U Olderado

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-06-08
    Type: Initial release
  • Version 1.1: 2008-04-29
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance