5TAR

Crystal structure of farnesylated and methylated kras4b in complex with PDE-delta (crystal form II - with ordered hypervariable region)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.266 
  • R-Value Work: 0.223 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural basis of recognition of farnesylated and methylated KRAS4b by PDE delta.

Dharmaiah, S.Bindu, L.Tran, T.H.Gillette, W.K.Frank, P.H.Ghirlando, R.Nissley, D.V.Esposito, D.McCormick, F.Stephen, A.G.Simanshu, D.K.

(2016) Proc.Natl.Acad.Sci.USA 113: E6766-E6775

  • DOI: 10.1073/pnas.1615316113
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Farnesylation and carboxymethylation of KRAS4b (Kirsten rat sarcoma isoform 4b) are essential for its interaction with the plasma membrane where KRAS-mediated signaling events occur. Phosphodiesterase-δ (PDEδ) binds to KRAS4b and plays an important r ...

    Farnesylation and carboxymethylation of KRAS4b (Kirsten rat sarcoma isoform 4b) are essential for its interaction with the plasma membrane where KRAS-mediated signaling events occur. Phosphodiesterase-δ (PDEδ) binds to KRAS4b and plays an important role in targeting it to cellular membranes. We solved structures of human farnesylated-methylated KRAS4b in complex with PDEδ in two different crystal forms. In these structures, the interaction is driven by the C-terminal amino acids together with the farnesylated and methylated C185 of KRAS4b that binds tightly in the central hydrophobic pocket present in PDEδ. In crystal form II, we see the full-length structure of farnesylated-methylated KRAS4b, including the hypervariable region. Crystal form I reveals structural details of farnesylated-methylated KRAS4b binding to PDEδ, and crystal form II suggests the potential binding mode of geranylgeranylated-methylated KRAS4b to PDEδ. We identified a 5-aa-long sequence motif (Lys-Ser-Lys-Thr-Lys) in KRAS4b that may enable PDEδ to bind both forms of prenylated KRAS4b. Structure and sequence analysis of various prenylated proteins that have been previously tested for binding to PDEδ provides a rationale for why some prenylated proteins, such as KRAS4a, RalA, RalB, and Rac1, do not bind to PDEδ. Comparison of all four available structures of PDEδ complexed with various prenylated proteins/peptides shows the presence of additional interactions due to a larger protein-protein interaction interface in KRAS4b-PDEδ complex. This interface might be exploited for designing an inhibitor with minimal off-target effects.


    Organizational Affiliation

    NCI RAS Initiative, Cancer Research Technology Program, Frederick National Laboratory for Cancer Research, Leidos Biomedical Research, Inc., Frederick, MD 21701.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
GTPase KRas
A
185Homo sapiensMutation(s): 0 
Gene Names: KRAS (KRAS2, RASK2)
Find proteins for P01116 (Homo sapiens)
Go to Gene View: KRAS
Go to UniProtKB:  P01116
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Retinal rod rhodopsin-sensitive cGMP 3',5'-cyclic phosphodiesterase subunit delta
B
148Homo sapiensMutation(s): 0 
Gene Names: PDE6D (PDED)
Find proteins for O43924 (Homo sapiens)
Go to Gene View: PDE6D
Go to UniProtKB:  O43924
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GDP
Query on GDP

Download SDF File 
Download CCD File 
A
GUANOSINE-5'-DIPHOSPHATE
C10 H15 N5 O11 P2
QGWNDRXFNXRZMB-UUOKFMHZSA-N
 Ligand Interaction
FAR
Query on FAR

Download SDF File 
Download CCD File 
A
FARNESYL
C15 H26
JXBSHSBNOVLGHF-BUJBXKITSA-N
 Ligand Interaction
EDO
Query on EDO

Download SDF File 
Download CCD File 
B
1,2-ETHANEDIOL
ETHYLENE GLYCOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
CMT
Query on CMT
A
L-PEPTIDE LINKINGC4 H9 N O2 SCYS
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.266 
  • R-Value Work: 0.223 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 58.140α = 90.00
b = 70.495β = 90.00
c = 84.684γ = 90.00
Software Package:
Software NamePurpose
Cootmodel building
XDSdata reduction
PHASERphasing
REFMACrefinement
XSCALEdata scaling
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2016-11-02
    Type: Initial release
  • Version 1.1: 2016-11-16
    Type: Structure summary