1S63

Human protein farnesyltransferase complexed with L-778,123 and FPP


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.184 
  • R-Value Work: 0.161 
  • R-Value Observed: 0.161 

Starting Model: experimental
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Ligand Structure Quality Assessment 


This is version 2.1 of the entry. See complete history


Literature

Crystallographic Analysis Reveals that Anticancer Clinical Candidate L-778,123 Inhibits Protein Farnesyltransferase and Geranylgeranyltransferase-I by Different Binding Modes.

Reid, T.S.Long, S.B.Beese, L.S.

(2004) Biochemistry 43: 9000-9008

  • DOI: https://doi.org/10.1021/bi049280b
  • Primary Citation of Related Structures:  
    1S63, 1S64

  • PubMed Abstract: 

    Many signal transduction proteins that control growth, differentiation, and transformation, including Ras GTPase family members, require the covalent attachment of a lipid group by protein farnesyltransferase (FTase) or protein geranylgeranyltransferase type-I (GGTase-I) for proper function and for the transforming activity of oncogenic mutants. FTase inhibitors are a new class of potential cancer therapeutics under evaluation in human clinical trials. Here, we present crystal structures of the clinical candidate L-778,123 complexed with mammalian FTase and complexed with the related GGTase-I enzyme. Although FTase and GGTase-I have very similar active sites, L-778,123 adopts different binding modes in the two enzymes; in FTase, L-778,123 is competitive with the protein substrate, whereas in GGTase-I, L-778,123 is competitive with the lipid substrate and inhibitor binding is synergized by tetrahedral anions. A comparison of these complexes reveals that small differences in protein structure can dramatically affect inhibitor binding and selectivity. These structures should facilitate the design of more specific inhibitors toward FTase or GGTase-I. Finally, the binding of a drug and anion together could be applicable for developing new classes of inhibitors.


  • Organizational Affiliation

    Department of Biochemistry, Duke University Medical Center, Durham, North Carolina 27710, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Protein farnesyltransferase/geranylgeranyltransferase type I alpha subunit382Homo sapiensMutation(s): 0 
Gene Names: FNTA
EC: 2.5.1.58 (PDB Primary Data), 2.5.1.59 (PDB Primary Data)
UniProt & NIH Common Fund Data Resources
Find proteins for P49354 (Homo sapiens)
Explore P49354 
Go to UniProtKB:  P49354
PHAROS:  P49354
GTEx:  ENSG00000168522 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP49354
Sequence Annotations
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Protein farnesyltransferase beta subunit437Homo sapiensMutation(s): 0 
Gene Names: FNTB
EC: 2.5.1.58
UniProt & NIH Common Fund Data Resources
Find proteins for P49356 (Homo sapiens)
Explore P49356 
Go to UniProtKB:  P49356
PHAROS:  P49356
GTEx:  ENSG00000257365 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP49356
Sequence Annotations
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  • Reference Sequence
Oligosaccharides

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Entity ID: 3
MoleculeChains Length2D Diagram Glycosylation3D Interactions
beta-D-fructofuranose-(2-1)-alpha-D-glucopyranose
C
2N/A
Glycosylation Resources
GlyTouCan:  G05551OP
GlyCosmos:  G05551OP
Small Molecules
Binding Affinity Annotations 
IDSourceBinding Affinity
778 PDBBind:  1S63 Ki: 0.9 (nM) from 1 assay(s)
BindingDB:  1S63 IC50: min: 2, max: 2000 (nM) from 8 assay(s)
EC50: 6800 (nM) from 1 assay(s)
FPP BindingDB:  1S63 Kd: 2 (nM) from 1 assay(s)
Biologically Interesting Molecules (External Reference) 1 Unique
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.184 
  • R-Value Work: 0.161 
  • R-Value Observed: 0.161 
  • Space Group: P 61
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 178.247α = 90
b = 178.247β = 90
c = 64.518γ = 120
Software Package:
Software NamePurpose
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling
CNSphasing
X-PLORrefinement

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2004-07-27
    Type: Initial release
  • Version 1.1: 2008-04-29
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2019-07-24
    Changes: Data collection, Refinement description
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Atomic model, Data collection, Database references, Derived calculations, Non-polymer description, Structure summary
  • Version 2.1: 2023-08-23
    Changes: Data collection, Database references, Refinement description, Structure summary