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- PDB-2hxl: crystal structure of Chek1 in complex with inhibitor 1 -

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Basic information

Entry
Database: PDB / ID: 2hxl
Titlecrystal structure of Chek1 in complex with inhibitor 1
ComponentsSerine/threonine-protein kinase Chk1
KeywordsTRANSFERASE / Chek1 / Kinase / cell cycle checkpoint
Function / homology
Function and homology information


negative regulation of G0 to G1 transition / apoptotic process involved in development / histone H3T11 kinase activity / regulation of mitotic centrosome separation / negative regulation of mitotic nuclear division / mitotic G2/M transition checkpoint / inner cell mass cell proliferation / regulation of double-strand break repair via homologous recombination / negative regulation of gene expression, epigenetic / nucleus organization ...negative regulation of G0 to G1 transition / apoptotic process involved in development / histone H3T11 kinase activity / regulation of mitotic centrosome separation / negative regulation of mitotic nuclear division / mitotic G2/M transition checkpoint / inner cell mass cell proliferation / regulation of double-strand break repair via homologous recombination / negative regulation of gene expression, epigenetic / nucleus organization / Transcriptional Regulation by E2F6 / mitotic G2 DNA damage checkpoint signaling / Presynaptic phase of homologous DNA pairing and strand exchange / replicative senescence / peptidyl-threonine phosphorylation / signal transduction in response to DNA damage / Chk1/Chk2(Cds1) mediated inactivation of Cyclin B:Cdk1 complex / Activation of ATR in response to replication stress / positive regulation of cell cycle / DNA damage checkpoint signaling / regulation of signal transduction by p53 class mediator / replication fork / condensed nuclear chromosome / TP53 Regulates Transcription of DNA Repair Genes / Ubiquitin-Mediated Degradation of Phosphorylated Cdc25A / cellular response to mechanical stimulus / Signaling by SCF-KIT / G2/M DNA damage checkpoint / G2/M transition of mitotic cell cycle / regulation of cell population proliferation / Processing of DNA double-strand break ends / Regulation of TP53 Activity through Phosphorylation / DNA replication / protein phosphorylation / non-specific serine/threonine protein kinase / protein kinase activity / chromatin remodeling / protein domain specific binding / protein serine kinase activity / DNA repair / intracellular membrane-bounded organelle / protein serine/threonine kinase activity / apoptotic process / DNA damage response / centrosome / chromatin / protein-containing complex / extracellular space / nucleoplasm / ATP binding / nucleus / cytosol / cytoplasm
Similarity search - Function
Checkpoint kinase 1, catalytic domain / Phosphorylase Kinase; domain 1 / Phosphorylase Kinase; domain 1 / Transferase(Phosphotransferase) domain 1 / Transferase(Phosphotransferase); domain 1 / Serine/threonine-protein kinase, active site / Serine/Threonine protein kinases active-site signature. / Protein kinase domain / Serine/Threonine protein kinases, catalytic domain / Protein kinase, ATP binding site ...Checkpoint kinase 1, catalytic domain / Phosphorylase Kinase; domain 1 / Phosphorylase Kinase; domain 1 / Transferase(Phosphotransferase) domain 1 / Transferase(Phosphotransferase); domain 1 / Serine/threonine-protein kinase, active site / Serine/Threonine protein kinases active-site signature. / Protein kinase domain / Serine/Threonine protein kinases, catalytic domain / Protein kinase, ATP binding site / Protein kinases ATP-binding region signature. / Protein kinase domain profile. / Protein kinase domain / Protein kinase-like domain superfamily / 2-Layer Sandwich / Orthogonal Bundle / Mainly Alpha / Alpha Beta
Similarity search - Domain/homology
Chem-422 / Serine/threonine-protein kinase Chk1
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodX-RAY DIFFRACTION / FOURIER SYNTHESIS / Resolution: 1.8 Å
AuthorsYan, Y.
CitationJournal: Bioorg.Med.Chem.Lett. / Year: 2006
Title: Development of 6-substituted indolylquinolinones as potent Chek1 kinase inhibitors.
Authors: Huang, S. / Garbaccio, R.M. / Fraley, M.E. / Steen, J. / Kreatsoulas, C. / Hartman, G. / Stirdivant, S. / Drakas, B. / Rickert, K. / Walsh, E. / Hamilton, K. / Buser, C.A. / Hardwick, J. / ...Authors: Huang, S. / Garbaccio, R.M. / Fraley, M.E. / Steen, J. / Kreatsoulas, C. / Hartman, G. / Stirdivant, S. / Drakas, B. / Rickert, K. / Walsh, E. / Hamilton, K. / Buser, C.A. / Hardwick, J. / Mao, X. / Abrams, M. / Beck, S. / Tao, W. / Lobell, R. / Sepp-Lorenzino, L. / Yan, Y. / Ikuta, M. / Murphy, J.Z. / Sardana, V. / Munshi, S. / Kuo, L. / Reilly, M. / Mahan, E.
History
DepositionAug 3, 2006Deposition site: RCSB / Processing site: RCSB
Revision 1.0Jun 19, 2007Provider: repository / Type: Initial release
Revision 1.1May 1, 2008Group: Version format compliance
Revision 1.2Jul 13, 2011Group: Version format compliance
Revision 1.3Aug 30, 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 / 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 / _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

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Assembly

Deposited unit
A: Serine/threonine-protein kinase Chk1
hetero molecules


Theoretical massNumber of molelcules
Total (without water)37,1752
Polymers36,7911
Non-polymers3841
Water2,072115
1


  • Idetical with deposited unit
  • defined by author
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Unit cell
Length a, b, c (Å)45.100, 65.640, 58.140
Angle α, β, γ (deg.)90.00, 94.82, 90.00
Int Tables number4
Space group name H-MP1211

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Components

#1: Protein Serine/threonine-protein kinase Chk1


Mass: 36790.957 Da / Num. of mol.: 1 / Fragment: Chek1 kinase domain
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: CHEK1 / Plasmid: pRAD2030 / Production host: Spodoptera frugiperda (fall armyworm)
References: UniProt: O14757, non-specific serine/threonine protein kinase
#2: Chemical ChemComp-422 / 3-(5-{[4-(AMINOMETHYL)PIPERIDIN-1-YL]METHYL}-1H-INDOL-2-YL)-1H-INDAZOLE-6-CARBONITRILE


Mass: 384.477 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C23H24N6
#3: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 115 / Source method: isolated from a natural source / Formula: H2O

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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: 2.33 Å3/Da / Density % sol: 47.2 %
Crystal growTemperature: 298 K / Method: vapor diffusion, hanging drop / pH: 6.8
Details: 13% PEG 8K, 0.1M ammonium sulfate, 2% glycerol, 0.1M cacodylate buffer at pH6.8, VAPOR DIFFUSION, HANGING DROP, temperature 298K

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Data collection

DiffractionMean temperature: 100 K
Diffraction sourceSource: ROTATING ANODE / Type: RIGAKU / Wavelength: 1.5418 Å
DetectorType: RIGAKU RAXIS IV / Detector: IMAGE PLATE / Date: Aug 18, 2004 / Details: blue confocal optical system
RadiationProtocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 1.5418 Å / Relative weight: 1
ReflectionResolution: 1.8→45 Å / Num. all: 31429 / Num. obs: 30801 / % possible obs: 98 % / Observed criterion σ(F): 0 / Observed criterion σ(I): 0 / Redundancy: 6.1 % / Rmerge(I) obs: 0.067 / Rsym value: 0.067 / Net I/σ(I): 12
Reflection shellResolution: 1.8→1.86 Å / Redundancy: 6.1 % / Rmerge(I) obs: 0.482 / Mean I/σ(I) obs: 3.1 / Num. unique all: 3130 / Rsym value: 0.482 / % possible all: 96

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Processing

Software
NameClassification
CrystalCleardata collection
CNSrefinement
d*TREKdata reduction
d*TREKdata scaling
CNSphasing
RefinementMethod to determine structure: FOURIER SYNTHESIS
Starting model: 1IA8

1ia8


Resolution: 1.8→40 Å / σ(F): 0 / σ(I): 0 / Stereochemistry target values: Engh & Huber
RfactorNum. reflection% reflectionSelection details
Rfree0.27 1528 -ramdom
Rwork0.24 ---
all0.24 31424 --
obs0.24 30747 98 %-
Refinement stepCycle: LAST / Resolution: 1.8→40 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms2202 0 29 115 2346
Refine LS restraints
Refine-IDTypeDev ideal
X-RAY DIFFRACTIONc_bond_d0.008
X-RAY DIFFRACTIONc_angle_deg1.56

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