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- PDB-4ept: Discovery of Small Molecules that Bind to K-Ras and Inhibit Sos-m... -

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Entry
Database: PDB / ID: 4ept
TitleDiscovery of Small Molecules that Bind to K-Ras and Inhibit Sos-mediated Activation
ComponentsGTPase KRas
KeywordsHYDROLASE / small GTPase / Signaling transduction / SOS / Raf / Ral / PI3K / cytosol / binder
Function / homology
Function and homology information


forebrain astrocyte development / negative regulation of epithelial cell differentiation / type I pneumocyte differentiation / regulation of synaptic transmission, GABAergic / epithelial tube branching involved in lung morphogenesis / Rac protein signal transduction / positive regulation of Rac protein signal transduction / skeletal muscle cell differentiation / Signaling by RAS GAP mutants / Signaling by RAS GTPase mutants ...forebrain astrocyte development / negative regulation of epithelial cell differentiation / type I pneumocyte differentiation / regulation of synaptic transmission, GABAergic / epithelial tube branching involved in lung morphogenesis / Rac protein signal transduction / positive regulation of Rac protein signal transduction / skeletal muscle cell differentiation / Signaling by RAS GAP mutants / Signaling by RAS GTPase mutants / Activation of RAS in B cells / RAS signaling downstream of NF1 loss-of-function variants / RUNX3 regulates p14-ARF / SOS-mediated signalling / Activated NTRK3 signals through RAS / Activated NTRK2 signals through RAS / SHC1 events in ERBB4 signaling / Signalling to RAS / Activated NTRK2 signals through FRS2 and FRS3 / SHC-related events triggered by IGF1R / glial cell proliferation / Estrogen-stimulated signaling through PRKCZ / SHC-mediated cascade:FGFR3 / MET activates RAS signaling / SHC-mediated cascade:FGFR2 / Signaling by PDGFRA transmembrane, juxtamembrane and kinase domain mutants / Signaling by PDGFRA extracellular domain mutants / PTK6 Regulates RHO GTPases, RAS GTPase and MAP kinases / SHC-mediated cascade:FGFR4 / Signaling by CSF3 (G-CSF) / Signaling by FGFR4 in disease / Erythropoietin activates RAS / SHC-mediated cascade:FGFR1 / FRS-mediated FGFR3 signaling / Signaling by FLT3 ITD and TKD mutants / protein-membrane adaptor activity / FRS-mediated FGFR2 signaling / FRS-mediated FGFR4 signaling / Signaling by FGFR3 in disease / p38MAPK events / Tie2 Signaling / positive regulation of glial cell proliferation / FRS-mediated FGFR1 signaling / homeostasis of number of cells within a tissue / Signaling by FGFR2 in disease / striated muscle cell differentiation / GRB2 events in EGFR signaling / SHC1 events in EGFR signaling / Signaling by FLT3 fusion proteins / FLT3 Signaling / Signaling by FGFR1 in disease / EGFR Transactivation by Gastrin / NCAM signaling for neurite out-growth / CD209 (DC-SIGN) signaling / GRB2 events in ERBB2 signaling / Downstream signal transduction / Ras activation upon Ca2+ influx through NMDA receptor / SHC1 events in ERBB2 signaling / Insulin receptor signalling cascade / Constitutive Signaling by Overexpressed ERBB2 / Signaling by phosphorylated juxtamembrane, extracellular and kinase domain KIT mutants / VEGFR2 mediated cell proliferation / small monomeric GTPase / FCERI mediated MAPK activation / RAF activation / regulation of long-term neuronal synaptic plasticity / Signaling by ERBB2 TMD/JMD mutants / Signaling by high-kinase activity BRAF mutants / Signaling by SCF-KIT / Constitutive Signaling by EGFRvIII / MAP2K and MAPK activation / Signaling by ERBB2 ECD mutants / visual learning / Signaling by ERBB2 KD Mutants / cytoplasmic side of plasma membrane / Regulation of RAS by GAPs / RAS processing / Signaling by CSF1 (M-CSF) in myeloid cells / Signaling by RAF1 mutants / Negative regulation of MAPK pathway / Signaling by moderate kinase activity BRAF mutants / Paradoxical activation of RAF signaling by kinase inactive BRAF / Signaling downstream of RAS mutants / GDP binding / Signaling by BRAF and RAF1 fusions / MAPK cascade / DAP12 signaling / Constitutive Signaling by Ligand-Responsive EGFR Cancer Variants / G protein activity / actin cytoskeleton organization / Ca2+ pathway / RAF/MAP kinase cascade / neuron apoptotic process / gene expression / negative regulation of neuron apoptotic process / mitochondrial outer membrane / Ras protein signal transduction / Golgi membrane / focal adhesion / GTPase activity
Similarity search - Function
Small GTPase, Ras-type / small GTPase Ras family profile. / Ran (Ras-related nuclear proteins) /TC4 subfamily of small GTPases / Rho (Ras homology) subfamily of Ras-like small GTPases / Ras subfamily of RAS small GTPases / Small GTPase / Ras family / Rab subfamily of small GTPases / Small GTP-binding protein domain / P-loop containing nucleotide triphosphate hydrolases ...Small GTPase, Ras-type / small GTPase Ras family profile. / Ran (Ras-related nuclear proteins) /TC4 subfamily of small GTPases / Rho (Ras homology) subfamily of Ras-like small GTPases / Ras subfamily of RAS small GTPases / Small GTPase / Ras family / Rab subfamily of small GTPases / Small GTP-binding protein domain / P-loop containing nucleotide triphosphate hydrolases / Rossmann fold / P-loop containing nucleoside triphosphate hydrolase / 3-Layer(aba) Sandwich / Alpha Beta
Similarity search - Domain/homology
(2-hydroxyphenyl)(pyrrolidin-1-yl)methanethione / GUANOSINE-5'-DIPHOSPHATE / GTPase KRas
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodX-RAY DIFFRACTION / MOLECULAR REPLACEMENT / Resolution: 2 Å
AuthorsSun, Q. / Burke, J.P. / Phan, J. / Burns, M.C. / Olejniczak, E.T. / Waterson, A.G. / Lee, T. / Rossanese, O.W. / Fesik, S.W.
CitationJournal: Angew.Chem.Int.Ed.Engl. / Year: 2012
Title: Discovery of Small Molecules that Bind to K-Ras and Inhibit Sos-Mediated Activation.
Authors: Sun, Q. / Burke, J.P. / Phan, J. / Burns, M.C. / Olejniczak, E.T. / Waterson, A.G. / Lee, T. / Rossanese, O.W. / Fesik, S.W.
History
DepositionApr 17, 2012Deposition site: RCSB / Processing site: RCSB
Revision 1.0May 23, 2012Provider: repository / Type: Initial release
Revision 1.1Jul 25, 2012Group: Database references
Revision 1.2Sep 13, 2023Group: Data collection / Database references ...Data collection / Database references / Derived calculations / Refinement description
Category: chem_comp_atom / chem_comp_bond ...chem_comp_atom / chem_comp_bond / database_2 / pdbx_initial_refinement_model / pdbx_struct_conn_angle / struct_conn / struct_ref_seq_dif / struct_site
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession ..._database_2.pdbx_DOI / _database_2.pdbx_database_accession / _pdbx_struct_conn_angle.ptnr1_auth_comp_id / _pdbx_struct_conn_angle.ptnr1_auth_seq_id / _pdbx_struct_conn_angle.ptnr1_label_asym_id / _pdbx_struct_conn_angle.ptnr1_label_atom_id / _pdbx_struct_conn_angle.ptnr1_label_comp_id / _pdbx_struct_conn_angle.ptnr1_label_seq_id / _pdbx_struct_conn_angle.ptnr3_auth_comp_id / _pdbx_struct_conn_angle.ptnr3_auth_seq_id / _pdbx_struct_conn_angle.ptnr3_label_asym_id / _pdbx_struct_conn_angle.ptnr3_label_atom_id / _pdbx_struct_conn_angle.ptnr3_label_comp_id / _pdbx_struct_conn_angle.ptnr3_label_seq_id / _pdbx_struct_conn_angle.value / _struct_conn.pdbx_dist_value / _struct_conn.ptnr1_auth_comp_id / _struct_conn.ptnr1_auth_seq_id / _struct_conn.ptnr1_label_asym_id / _struct_conn.ptnr1_label_atom_id / _struct_conn.ptnr1_label_comp_id / _struct_conn.ptnr1_label_seq_id / _struct_conn.ptnr2_auth_comp_id / _struct_conn.ptnr2_auth_seq_id / _struct_conn.ptnr2_label_asym_id / _struct_conn.ptnr2_label_atom_id / _struct_conn.ptnr2_label_comp_id / _struct_ref_seq_dif.details / _struct_site.pdbx_auth_asym_id / _struct_site.pdbx_auth_comp_id / _struct_site.pdbx_auth_seq_id

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: GTPase KRas
hetero molecules


Theoretical massNumber of molelcules
Total (without water)19,9884
Polymers19,3131
Non-polymers6753
Water2,090116
1


  • Idetical with deposited unit
  • defined by author&software
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
MethodPISA
Unit cell
Length a, b, c (Å)93.055, 93.055, 37.202
Angle α, β, γ (deg.)90.00, 90.00, 120.00
Int Tables number173
Space group name H-MP63

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Components

#1: Protein GTPase KRas / K-Ras 2 / Ki-Ras / c-K-ras / c-Ki-ras / GTPase KRas / N-terminally processed


Mass: 19312.746 Da / Num. of mol.: 1 / Fragment: Catalytic / Mutation: C118S
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: KRAS, KRAS2, RASK2 / Production host: Escherichia coli (E. coli) / References: UniProt: P01116, small monomeric GTPase
#2: Chemical ChemComp-GDP / GUANOSINE-5'-DIPHOSPHATE


Type: RNA linking / Mass: 443.201 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C10H15N5O11P2 / Comment: GDP, energy-carrying molecule*YM
#3: Chemical ChemComp-MG / MAGNESIUM ION


Mass: 24.305 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: Mg
#4: Chemical ChemComp-0QW / (2-hydroxyphenyl)(pyrrolidin-1-yl)methanethione


Mass: 207.292 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C11H13NOS
#5: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 116 / Source method: isolated from a natural source / Formula: H2O
Sequence detailsTHE CRYSTALLIZED SEQUENCE CORRESPONDS TO UNP P01116-2 OF ISOFORM 2B OF GTPASE KRAS

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Experimental details

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Experiment

ExperimentMethod: X-RAY DIFFRACTION / Number of used crystals: 1

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Sample preparation

CrystalDensity Matthews: 2.41 Å3/Da / Density % sol: 48.91 %
Crystal growTemperature: 291 K / Method: vapor diffusion, hanging drop / pH: 6.5
Details: 30% PEG8000, 0.1 M MES, 0.2 M sodium acetate, pH 6.5, VAPOR DIFFUSION, HANGING DROP, temperature 291K

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Data collection

DiffractionMean temperature: 100 K
Diffraction sourceSource: ROTATING ANODE / Type: BRUKER AXS MICROSTAR / Wavelength: 1.5418 Å
DetectorType: Bruker Platinum 135 / Detector: CCD / Date: Feb 10, 2011
RadiationMonochromator: Montel confocal, multi-layer mirrors / Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 1.5418 Å / Relative weight: 1
ReflectionResolution: 2→50 Å / Num. all: 12685 / Num. obs: 12614 / % possible obs: 99.5 % / Observed criterion σ(F): 0 / Observed criterion σ(I): -3 / Redundancy: 4.7 % / Rmerge(I) obs: 0.113 / Net I/σ(I): 10.2
Reflection shellResolution: 2→2.03 Å / Redundancy: 2.8 % / Rmerge(I) obs: 0.28 / Mean I/σ(I) obs: 4.1 / % possible all: 99.7

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Processing

Software
NameVersionClassification
PROTEUM PLUSPLUSdata collection
MOLREPphasing
REFMAC5.6.0119refinement
HKL-2000data reduction
HKL-2000data scaling
RefinementMethod to determine structure: MOLECULAR REPLACEMENT
Starting model: pdb entry 1LF5

1lf5


Resolution: 2→50 Å / Cor.coef. Fo:Fc: 0.916 / Cor.coef. Fo:Fc free: 0.874 / SU B: 5.351 / SU ML: 0.146 / Cross valid method: THROUGHOUT / ESU R: 0.241 / ESU R Free: 0.202 / Stereochemistry target values: MAXIMUM LIKELIHOOD / Details: HYDROGENS HAVE BEEN ADDED IN THE RIDING POSITIONS
RfactorNum. reflection% reflectionSelection details
Rfree0.27436 596 4.9 %RANDOM
Rwork0.22934 ---
obs0.23157 11632 96.48 %-
all-12685 --
Solvent computationIon probe radii: 0.8 Å / Shrinkage radii: 0.8 Å / VDW probe radii: 1.4 Å / Solvent model: MASK
Displacement parametersBiso mean: 20.261 Å2
Baniso -1Baniso -2Baniso -3
1--0.17 Å2-0.09 Å20 Å2
2---0.17 Å20 Å2
3---0.26 Å2
Refinement stepCycle: LAST / Resolution: 2→50 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms1323 0 43 116 1482
Refine LS restraints
Refine-IDTypeDev idealDev ideal targetNumber
X-RAY DIFFRACTIONr_bond_refined_d0.0240.0221389
X-RAY DIFFRACTIONr_angle_refined_deg2.0241.9941881
X-RAY DIFFRACTIONr_dihedral_angle_1_deg7.1455165
X-RAY DIFFRACTIONr_dihedral_angle_2_deg42.70824.41268
X-RAY DIFFRACTIONr_dihedral_angle_3_deg17.12515243
X-RAY DIFFRACTIONr_dihedral_angle_4_deg22.6251510
X-RAY DIFFRACTIONr_chiral_restr0.1390.2208
X-RAY DIFFRACTIONr_gen_planes_refined0.010.0211042
X-RAY DIFFRACTIONr_mcbond_it1.2611.5822
X-RAY DIFFRACTIONr_mcbond_other
X-RAY DIFFRACTIONr_mcangle_it2.24821333
X-RAY DIFFRACTIONr_scbond_it3.4813567
X-RAY DIFFRACTIONr_scangle_it5.1714.5548
X-RAY DIFFRACTIONr_rigid_bond_restr
X-RAY DIFFRACTIONr_sphericity_free
X-RAY DIFFRACTIONr_sphericity_bonded
LS refinement shellResolution: 2→2.052 Å / Total num. of bins used: 20
RfactorNum. reflection% reflection
Rfree0.297 50 -
Rwork0.218 878 -
obs--99.25 %

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