3IPN

Crystal Structure of fluorine and methyl modified collagen: (mepFlpgly)7


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.21 Å
  • R-Value Free: 0.258 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Stereoelectronic and steric effects in side chains preorganize a protein main chain.

Shoulders, M.D.Satyshur, K.A.Forest, K.T.Raines, R.T.

(2010) Proc.Natl.Acad.Sci.USA 107: 559-564

  • DOI: 10.1073/pnas.0909592107

  • PubMed Abstract: 
  • Preorganization is shown to endow a protein with extraordinary conformational stability. This preorganization is achieved by installing side-chain substituents that impose stereoelectronic and steric effects that restrict main-chain torsion angles. R ...

    Preorganization is shown to endow a protein with extraordinary conformational stability. This preorganization is achieved by installing side-chain substituents that impose stereoelectronic and steric effects that restrict main-chain torsion angles. Replacing proline residues in (ProProGly)(7) collagen strands with 4-fluoroproline and 4-methylproline leads to the most stable known triple helices, having T ( m ) values that are increased by > 50 degrees C. Differential scanning calorimetry data indicate an entropic basis to the hyperstability, as expected from an origin in preorganization. Structural data at a resolution of 1.21 A reveal a prototypical triple helix with insignificant deviations to its main chain, even though 2/3 of the residues are nonnatural. Thus, preorganization of a main chain by subtle changes to side chains can confer extraordinary conformational stability upon a protein without perturbing its structure.


    Organizational Affiliation

    Department of Chemistry, University of Wisconsin, Madison, WI 53706, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Non-natural Collagen
A, B, C, D, E, F
21N/A
Protein Feature View is not available: No corresponding UniProt sequence found.
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CO3
Query on CO3

Download SDF File 
Download CCD File 
A, B, D, F
CARBONATE ION
C O3
BVKZGUZCCUSVTD-UHFFFAOYSA-L
 Ligand Interaction
Modified Residues  2 Unique
IDChainsTypeFormula2D DiagramParent
FP9
Query on FP9
A, B, C, D, E, F
L-PEPTIDE LINKINGC5 H8 F N O2PRO
MP8
Query on MP8
A, B, C, D, E, F
L-PEPTIDE LINKINGC6 H11 N O2PRO
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.21 Å
  • R-Value Free: 0.258 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 26.400α = 90.00
b = 25.300β = 90.05
c = 61.900γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
HKL-2000data scaling
SHELXL-97refinement
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-02-02
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance