1KZO

PROTEIN FARNESYLTRANSFERASE COMPLEXED WITH FARNESYLATED K-RAS4B PEPTIDE PRODUCT AND FARNESYL DIPHOSPHATE SUBSTRATE BOUND SIMULTANEOUSLY


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.204 
  • R-Value Work: 0.159 
  • R-Value Observed: 0.159 

Starting Model: experimental
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This is version 1.3 of the entry. See complete history


Literature

The Reaction Path of Protein Farnesyltransferase at Atomic Resolution

Long, S.B.Casey, P.J.Beese, L.S.

(2002) Nature 419: 645-650

  • DOI: https://doi.org/10.1038/nature00986
  • Primary Citation of Related Structures:  
    1KZO, 1KZP

  • PubMed Abstract: 

    Protein farnesyltransferase (FTase) catalyses the attachment of a farnesyl lipid group to numerous essential signal transduction proteins, including members of the Ras superfamily. The farnesylation of Ras oncoproteins, which are associated with 30% of human cancers, is essential for their transforming activity. FTase inhibitors are currently in clinical trials for the treatment of cancer. Here we present a complete series of structures representing the major steps along the reaction coordinate of this enzyme. From these observations can be deduced the determinants of substrate specificity and an unusual mechanism in which product release requires binding of substrate, analogous to classically processive enzymes. A structural model for the transition state consistent with previous mechanistic studies was also constructed. The processive nature of the reaction suggests the structural basis for the successive addition of two prenyl groups to Rab proteins by the homologous enzyme geranylgeranyltransferase type-II. Finally, known FTase inhibitors seem to differ in their mechanism of inhibiting the enzyme.


  • Organizational Affiliation

    Department of Biochemistry, Duke University Medical Center, Durham, North Carolina 27710, USA. lsb@biochem.duke.edu


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Protein Farnesyltransferase alpha subunit377Rattus norvegicusMutation(s): 0 
EC: 2.5.1.21
UniProt
Find proteins for Q04631 (Rattus norvegicus)
Explore Q04631 
Go to UniProtKB:  Q04631
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UniProt GroupQ04631
Sequence Annotations
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  • Reference Sequence
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Protein Farnesyltransferase beta subunit437Rattus norvegicusMutation(s): 0 
EC: 2.5.1.21
UniProt
Find proteins for Q02293 (Rattus norvegicus)
Explore Q02293 
Go to UniProtKB:  Q02293
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UniProt GroupQ02293
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  • Reference Sequence

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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
Farnesylated K-Ras4B peptide product11N/AMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for P01116 (Homo sapiens)
Explore P01116 
Go to UniProtKB:  P01116
PHAROS:  P01116
GTEx:  ENSG00000133703 
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UniProt GroupP01116
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  • Reference Sequence
Small Molecules
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.204 
  • R-Value Work: 0.159 
  • R-Value Observed: 0.159 
  • Space Group: P 61
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 171.199α = 90
b = 171.199β = 90
c = 69.444γ = 120
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
X-PLORmodel building
X-PLORrefinement
X-PLORphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2002-10-16
    Type: Initial release
  • Version 1.1: 2008-04-28
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Atomic model, Database references, Derived calculations, Non-polymer description, Structure summary, Version format compliance
  • Version 1.3: 2023-08-16
    Changes: Data collection, Database references, Derived calculations, Refinement description