1A1B

C-SRC (SH2 DOMAIN) COMPLEXED WITH ACE-PHOSPHOTYR-GLU-(N,N-DIPENTYL AMINE)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Work: 0.174 
  • R-Value Observed: 0.174 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.4 of the entry. See complete history


Literature

Peptide ligands of pp60(c-src) SH2 domains: a thermodynamic and structural study.

Charifson, P.S.Shewchuk, L.M.Rocque, W.Hummel, C.W.Jordan, S.R.Mohr, C.Pacofsky, G.J.Peel, M.R.Rodriguez, M.Sternbach, D.D.Consler, T.G.

(1997) Biochemistry 36: 6283-6293

  • DOI: https://doi.org/10.1021/bi970019n
  • Primary Citation of Related Structures:  
    1A07, 1A08, 1A09, 1A1A, 1A1B, 1A1C, 1A1E

  • PubMed Abstract: 

    Thermodynamic measurements, structural determinations, and molecular computations were applied to a series of peptide ligands of the pp60(c-src) SH2 domain in an attempt to understand the critical binding determinants for this class of molecules. Isothermal titration calorimetry (ITC) measurements were combined with structural data derived from X-ray crystallographic studies on 12 peptide-SH2 domain complexes. The peptide ligands studied fall into two general classes: (1) dipeptides of the general framework N-acetylphosphotyrosine (or phosphotyrosine replacement)-Glu or methionine (or S-methylcysteine)-X, where X represents a hydrophobic amine, and (2) tetra- or pentapeptides of the general framework N-acetylphosphotyrosine-Glu-Glu-Ile-X, where X represents either Glu, Gln, or NH2. Dipeptide analogs which featured X as either hexanolamine or heptanolamine were able to pick up new hydrogen bonds involving their hydroxyl groups within a predominantly lipophilic surface cavity. However, due to internal strain as well as the solvent accessibility of the new hydrogen bonds formed, no net increase in binding affinity was observed. Phosphatase-resistant benzylmalonate and alpha,alpha-difluorobenzyl phosphonate analogs of phosphotyrosine retained some binding affinity for the pp60(c-src) SH2 domain but caused local structural perturbations in the phosphotyrosine-binding site. In the case where a reversible covalent thiohemiacetal was formed between a formylated phosphotyrosine analog and the thiol side chain of Cys-188, deltaS was 25.6 cal/(mol K) lower than for the nonformylated phosphotyrosine parent. Normal mode calculations show that the dramatic decrease in entropy observed for the covalent thiohemiacetal complex is due to the inability of the phosphotyrosine moiety to transform lost rotational and translational degrees of freedom into new vibrational modes.


  • Organizational Affiliation

    Department of Structural Chemistry, Glaxo Wellcome, Inc., Research Triangle Park, North Carolina 27709, USA. psc11602@glaxo.com


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
C-SRC TYROSINE KINASEA,
C [auth B]
107Homo sapiensMutation(s): 0 
Gene Names: SRC
EC: 2.7.1.112
UniProt & NIH Common Fund Data Resources
Find proteins for P12931 (Homo sapiens)
Explore P12931 
Go to UniProtKB:  P12931
PHAROS:  P12931
GTEx:  ENSG00000197122 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP12931
Sequence Annotations
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  • Reference Sequence

Find similar proteins by:  Sequence   |   3D Structure  

Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
ACE-PHOSPHOTYR-GLU-(N,N-DIPENTYL AMINE)B [auth C],
D
4N/AMutation(s): 0 
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChains TypeFormula2D DiagramParent
PTR
Query on PTR
B [auth C],
D
L-PEPTIDE LINKINGC9 H12 N O6 PTYR
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Work: 0.174 
  • R-Value Observed: 0.174 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 52.5α = 90
b = 67.1β = 90
c = 74.5γ = 90
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORrefinement
bioteXdata reduction
bioteXdata scaling
X-PLORphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1998-04-08
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2018-03-07
    Changes: Data collection, Other, Refinement description
  • Version 1.4: 2023-08-02
    Changes: Database references, Derived calculations, Refinement description