3N84

Crystal Structure of the Grb2 SH2 Domain in Complex with a 23-Membered Macrocyclic Ligand Having the Sequence pYVNVP

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.223 
  • R-Value Work: 0.180 

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This is version 1.1 of the entry. See complete history. 


Literature

Thermodynamic and Structural Effects of Macrocyclization as a Constraining Method in Protein-Ligand Interactions.

Delorbe, J.E., Clements, J.H., Whiddon, B.B., Martin, S.F.

(2010) ACS Med Chem Lett 1: 448-452

  • DOI: 10.1021/ml100142y
  • Primary Citation of Related Structures:  
    3N7Y, 3N84, 3N8M

  • PubMed Abstract: 

    • The thermodynamic and structural effects of macrocyclization as a tactic for stabilizing the biologically-active conformation of Grb2 SH2 binding peptides were investigated using isothermal titration calorimetry and x-ray crystallography. 23-Membered macrocycles containing the sequence pYVN were slightly more potent than their linear controls; however, preorganization did not necessarily eventuate in a more favorable binding entropy ...

    The thermodynamic and structural effects of macrocyclization as a tactic for stabilizing the biologically-active conformation of Grb2 SH2 binding peptides were investigated using isothermal titration calorimetry and x-ray crystallography. 23-Membered macrocycles containing the sequence pYVN were slightly more potent than their linear controls; however, preorganization did not necessarily eventuate in a more favorable binding entropy. Structures of complexes of macrocycle 7 and its acyclic control 8 are similar except for differences in relative orientations of corresponding atoms in the linking moieties of 7 and 8. There are no differences in the number of direct or water-mediated protein-ligand contacts that might account for the less favorable binding enthalpy of 7; however, an intramolecular hydrogen bond between the pY and pY+3 residues in 8 that is absent in 7 may be a factor. These studies highlight the difficulties associated with correlating energetics and structure in protein-ligand interactions.

    Organizational Affiliation: 

    Department of Chemistry and Biochemistry, The Institute of Cellular and Molecular Biology, and The Texas Institute of Drug and Diagnostic Development, The University of Texas, Austin, Texas 78712, USA.



Macromolecules
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(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Growth factor receptor-bound protein 2A, B, C, D, E, F112Homo sapiensMutation(s): 0 
Gene Names: GRB2, ASH
Find proteins for P62993 (Homo sapiens)
Explore P62993 
Go to UniProtKB:  P62993
NIH Common Fund Data Resources
PHAROS:  P62993
GTEx:  ENSG00000177885
Protein Feature View
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  • Reference Sequence
  • Find similar proteins by:  Sequence   |   Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
23-membered peptide-like macrocyclic ligandG, H, I, J, K, L6N/AMutation(s): 0 
Protein Feature View
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  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
PTR
Query on PTR		G, H, I, J, K, LL-PEPTIDE LINKINGC9 H12 N O6 PTYR
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.223 
  • R-Value Work: 0.180 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 83.223α = 90
b = 141.32β = 89.99
c = 62.452γ = 90
Software Package:
Software NamePurpose
CrystalCleardata collection
MOLREPphasing
CNSrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2011-01-12
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance