1NCY

TROPONIN-C, COMPLEX WITH MANGANESE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Work: 0.130 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

X-ray structures of Mn, Cd and Tb metal complexes of troponin C.

Rao, S.T.Satyshur, K.A.Greaser, M.L.Sundaralingam, M.

(1996) Acta Crystallogr.,Sect.D 52: 916-922

  • DOI: 10.1107/S0907444996006166
  • Primary Citation of Related Structures:  1NCX, 1NCZ

  • PubMed Abstract: 
  • The crystal structures of three metal complexes of troponin C (TnC) have been determined and refined where the two occupied structural Ca(2+) sites in the C domain have been substituted by Mn(2+), Cd(2+) and Tb(3+). The X-ray intensity data were coll ...

    The crystal structures of three metal complexes of troponin C (TnC) have been determined and refined where the two occupied structural Ca(2+) sites in the C domain have been substituted by Mn(2+), Cd(2+) and Tb(3+). The X-ray intensity data were collected to 2.1, 1.8 and 1.8 A resolution, respectively, on the three metal complexes, which are isomorphous with Ca-TnC. The three complexes have r.m.s. deviations of 0.27, 0.25 and 0.35 A, respectively, for all protein atoms, from Ca-TnC. Irrespective of the charge on the metal (+2 or +3), the occupied sites 3 and 4 exhibit a distorted pentagonal bipyramidal coordination, like Ca-TnC, with seven ligands, six from the 12-residue binding loop and the seventh from a water molecule. Mn(2+) at site 4 seems to display a longer distance to one of the carboxyl bidentate ligands representing an intermediate coordination simulating the six-coordinate Mg(2+). The carboxyl O atoms of the bidentate Glu12 are displaced on the side of the equatorial plane passing through the remaining three ligands with one O atom closer to the plane (Delta of 0.11 to 0.76 A) than the other (Delta of 0.93 to 1.38 A). The two axial ligands are an aspartic carboxyl O atom and a water molecule. The metal is displaced (0.18 to 0.56 A) towards the water facing the water channel.


    Related Citations: 
    • X-Ray Diffraction Studies of Troponin-C Crystals from Rabbit and Chicken Skeletal Muscles
      Strasburg, G.M.,Greaser, M.L.,Sundaralingam, M.
      (1980) J.Biol.Chem. 255: 3806
    • Structure of Chicken Skeletal Muscle Troponin-C at 1.78 Angstroms Resolution
      Satyshur, K.A.,Pyzalska, D.,Rao, S.T.,Greaser, M.,Sundaralingam, M.
      (1994) Acta Crystallogr.,Sect.D 50: 40
    • Molecular Structure of Troponin C from Chicken Skeletal Muscle at 3-Angstrom Resolution
      Sundaralingam, M.,Bergstrom, R.,Strasburg, G.,Rao, S.T.,Roychowdhury, P.,Greaser, M.,Wang, B.C.
      (1985) Science 227: 945
    • The Amino Acid Sequence of Troponin C from Chicken Skeletal Muscle
      Wilkinson, J.M.
      (1976) FEBS Lett. 70: 254
    • Refined Structure of Chicken Skeletal Muscle Troponin C in the Two-Calcium State at 2-A Resolution
      Satyshur, K.A.,Rao, S.T.,Pyzalska, D.,Drendel, W.,Greaser, M.,Sundaralingam, M.
      (1988) J.Biol.Chem. 263: 1628


    Organizational Affiliation

    Department of Biochemistry, College of Agricultural & Life Sciences, University of Wisconsin-Madison, 53706, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
TROPONIN C
A
162Gallus gallusGene Names: TNNC2
Find proteins for P02588 (Gallus gallus)
Go to Gene View: TNNC2
Go to UniProtKB:  P02588
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MN
Query on MN

Download SDF File 
Download CCD File 
A
MANGANESE (II) ION
Mn
WAEMQWOKJMHJLA-UHFFFAOYSA-N
 Ligand Interaction
SO4
Query on SO4

Download SDF File 
Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Work: 0.130 
  • Space Group: P 32 2 1
Unit Cell:
Length (Å)Angle (°)
a = 66.700α = 90.00
b = 66.700β = 90.00
c = 60.800γ = 120.00
Software Package:
Software NamePurpose
PURDUEdata scaling
PROLSQrefinement
PURDUEdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1997-01-11
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance