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- EMDB-12042: Cryo-EM structure of the human CAK bound to ICEC0942 at 2.5 Angst... -

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Basic information

Entry
Database: EMDB / ID: EMD-12042
TitleCryo-EM structure of the human CAK bound to ICEC0942 at 2.5 Angstroms resolution
Map dataPost-processed (sharpened, filtered) cryo-EM map, re-boxed into a 128 x 128 x 128 pixel box
Sample
  • Complex: CDK-activating kinase (CAK) in complex with ICEC0942
    • Protein or peptide: CDK-activating kinase assembly factor MAT1
    • Protein or peptide: Cyclin-H
    • Protein or peptide: Cyclin-dependent kinase 7
  • Ligand: (3R,4R)-4-[[[7-[(phenylmethyl)amino]-3-propan-2-yl-pyrazolo[1,5-a]pyrimidin-5-yl]amino]methyl]piperidin-3-ol
  • Ligand: water
Function / homology
Function and homology information


negative regulation of DNA helicase activity / ventricular system development / cyclin-dependent protein kinase activating kinase holoenzyme complex / snRNA transcription by RNA polymerase II / CAK-ERCC2 complex / transcription factor TFIIK complex / adult heart development / transcription factor TFIIH holo complex / transcription factor TFIIH core complex / cyclin-dependent protein serine/threonine kinase activator activity ...negative regulation of DNA helicase activity / ventricular system development / cyclin-dependent protein kinase activating kinase holoenzyme complex / snRNA transcription by RNA polymerase II / CAK-ERCC2 complex / transcription factor TFIIK complex / adult heart development / transcription factor TFIIH holo complex / transcription factor TFIIH core complex / cyclin-dependent protein serine/threonine kinase activator activity / [RNA-polymerase]-subunit kinase / RNA Polymerase I Transcription Termination / cyclin-dependent protein serine/threonine kinase regulator activity / RNA Pol II CTD phosphorylation and interaction with CE during HIV infection / RNA Pol II CTD phosphorylation and interaction with CE / Formation of the Early Elongation Complex / Formation of the HIV-1 Early Elongation Complex / mRNA Capping / HIV Transcription Initiation / RNA Polymerase II HIV Promoter Escape / Transcription of the HIV genome / RNA Polymerase II Promoter Escape / RNA Polymerase II Transcription Pre-Initiation And Promoter Opening / RNA Polymerase II Transcription Initiation / RNA Polymerase II Transcription Initiation And Promoter Clearance / regulation of cyclin-dependent protein serine/threonine kinase activity / regulation of G1/S transition of mitotic cell cycle / RNA Polymerase I Transcription Initiation / RNA polymerase II transcribes snRNA genes / Tat-mediated elongation of the HIV-1 transcript / Formation of HIV-1 elongation complex containing HIV-1 Tat / ATP-dependent activity, acting on DNA / cyclin-dependent kinase / Formation of HIV elongation complex in the absence of HIV Tat / cyclin-dependent protein serine/threonine kinase activity / Cyclin E associated events during G1/S transition / RNA Polymerase II Transcription Elongation / Cyclin A/B1/B2 associated events during G2/M transition / Formation of RNA Pol II elongation complex / Cyclin A:Cdk2-associated events at S phase entry / RNA Polymerase II Pre-transcription Events / RNA polymerase II CTD heptapeptide repeat kinase activity / male germ cell nucleus / transcription initiation at RNA polymerase II promoter / nucleotide-excision repair / RNA Polymerase I Promoter Escape / TP53 Regulates Transcription of DNA Repair Genes / positive regulation of smooth muscle cell proliferation / G1/S transition of mitotic cell cycle / NoRC negatively regulates rRNA expression / Transcription-Coupled Nucleotide Excision Repair (TC-NER) / Formation of TC-NER Pre-Incision Complex / fibrillar center / Formation of Incision Complex in GG-NER / Dual incision in TC-NER / response to calcium ion / Gap-filling DNA repair synthesis and ligation in TC-NER / Cyclin D associated events in G1 / RUNX1 regulates transcription of genes involved in differentiation of HSCs / protein-containing complex assembly / transcription by RNA polymerase II / protein stabilization / regulation of cell cycle / protein kinase activity / cell cycle / cell division / phosphorylation / DNA repair / protein serine kinase activity / protein serine/threonine kinase activity / regulation of transcription by RNA polymerase II / negative regulation of apoptotic process / perinuclear region of cytoplasm / positive regulation of transcription by RNA polymerase II / zinc ion binding / nucleoplasm / ATP binding / nucleus / plasma membrane / cytosol / cytoplasm
Similarity search - Function
CyclinH/Ccl1 / Cyclin-dependent kinase 7 / Cdk-activating kinase assembly factor MAT1/Tfb3 / Cdk-activating kinase assembly factor MAT1, centre / CDK-activating kinase assembly factor MAT1 / Zinc finger, C3HC4 type (RING finger) / Cyclin, C-terminal domain 2 / Cyclin C-terminal domain / Cyclin/Cyclin-like subunit Ssn8 / Ubiquitin interacting motif ...CyclinH/Ccl1 / Cyclin-dependent kinase 7 / Cdk-activating kinase assembly factor MAT1/Tfb3 / Cdk-activating kinase assembly factor MAT1, centre / CDK-activating kinase assembly factor MAT1 / Zinc finger, C3HC4 type (RING finger) / Cyclin, C-terminal domain 2 / Cyclin C-terminal domain / Cyclin/Cyclin-like subunit Ssn8 / Ubiquitin interacting motif / Ubiquitin-interacting motif (UIM) domain profile. / Cyclin, N-terminal / Cyclin, N-terminal domain / Cyclin-like / domain present in cyclins, TFIIB and Retinoblastoma / Cyclin-like superfamily / Zinc finger, RING-type, conserved site / Zinc finger RING-type signature. / Ring finger / Zinc finger RING-type profile. / Zinc finger, RING-type / Zinc finger, RING/FYVE/PHD-type / 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
Similarity search - Domain/homology
Cyclin-dependent kinase 7 / Cyclin-H / CDK-activating kinase assembly factor MAT1
Similarity search - Component
Biological speciesHomo sapiens (human)
Methodsingle particle reconstruction / cryo EM / Resolution: 2.5 Å
AuthorsGreber BJ / Remis J / Ali S / Nogales E
Funding support United States, 1 items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)R35GM127018 United States
CitationJournal: Biophys J / Year: 2021
Title: 2.5 Å-resolution structure of human CDK-activating kinase bound to the clinical inhibitor ICEC0942.
Authors: Basil J Greber / Jonathan Remis / Simak Ali / Eva Nogales /
Abstract: The human CDK-activating kinase (CAK), composed of CDK7, cyclin H, and MAT1, is involved in the control of transcription initiation and the cell cycle. Because of these activities, it has been ...The human CDK-activating kinase (CAK), composed of CDK7, cyclin H, and MAT1, is involved in the control of transcription initiation and the cell cycle. Because of these activities, it has been identified as a promising target for cancer chemotherapy. A number of CDK7 inhibitors have entered clinical trials, among them ICEC0942 (also known as CT7001). Structural information can aid in improving the affinity and specificity of such drugs or drug candidates, reducing side effects in patients. Here, we have determined the structure of the human CAK in complex with ICEC0942 at 2.5 Å-resolution using cryogenic electron microscopy. Our structure reveals conformational differences of ICEC0942 compared with previous X-ray crystal structures of the CDK2-bound complex, and highlights the critical ability of cryogenic electron microscopy to resolve structures of drug-bound protein complexes without the need to crystalize the protein target.
History
DepositionDec 5, 2020-
Header (metadata) releaseFeb 10, 2021-
Map releaseFeb 10, 2021-
UpdateMar 3, 2021-
Current statusMar 3, 2021Processing site: PDBe / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 0.045
  • Imaged by UCSF Chimera
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  • Surface view colored by radius
  • Surface level: 0.045
  • Imaged by UCSF Chimera
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  • Surface view with fitted model
  • Atomic models: PDB-7b5o
  • Surface level: 0.045
  • Imaged by UCSF Chimera
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  • Surface view with fitted model
  • Atomic models: PDB-7b5q
  • Surface level: 0.045
  • Imaged by UCSF Chimera
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Movie viewer
Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

emd_12042.png

Downloads & links

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Map

FileDownload / File: emd_12042.map.gz / Format: CCP4 / Size: 8 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationPost-processed (sharpened, filtered) cryo-EM map, re-boxed into a 128 x 128 x 128 pixel box
Voxel sizeX=Y=Z: 1.029 Å
Density
Contour LevelBy AUTHOR: 0.045 / Movie #1: 0.045
Minimum - Maximum-0.13677126 - 0.26206034
Average (Standard dev.)-2.8703422e-05 (±0.013377107)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions128128128
Spacing128128128
CellA=B=C: 131.712 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z1.0291.0291.029
M x/y/z128128128
origin x/y/z0.0000.0000.000
length x/y/z131.712131.712131.712
α/β/γ90.00090.00090.000
start NX/NY/NZ000
NX/NY/NZ320320320
MAP C/R/S123
start NC/NR/NS000
NC/NR/NS128128128
D min/max/mean-0.1370.262-0.000

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Supplemental data

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Mask #1

Fileemd_12042_msk_1.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: Unfiltered half-map

Fileemd_12042_half_map_1.map
AnnotationUnfiltered half-map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: Unfiltered half-map

Fileemd_12042_half_map_2.map
AnnotationUnfiltered half-map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Sample components

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Entire : CDK-activating kinase (CAK) in complex with ICEC0942

EntireName: CDK-activating kinase (CAK) in complex with ICEC0942
Components
  • Complex: CDK-activating kinase (CAK) in complex with ICEC0942
    • Protein or peptide: CDK-activating kinase assembly factor MAT1
    • Protein or peptide: Cyclin-H
    • Protein or peptide: Cyclin-dependent kinase 7
  • Ligand: (3R,4R)-4-[[[7-[(phenylmethyl)amino]-3-propan-2-yl-pyrazolo[1,5-a]pyrimidin-5-yl]amino]methyl]piperidin-3-ol
  • Ligand: water

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Supramolecule #1: CDK-activating kinase (CAK) in complex with ICEC0942

SupramoleculeName: CDK-activating kinase (CAK) in complex with ICEC0942 / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#3
Source (natural)Organism: Homo sapiens (human)
Recombinant expressionOrganism: Trichoplusia ni (cabbage looper) / Recombinant strain: High5
Molecular weightTheoretical: 120 KDa

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Macromolecule #1: CDK-activating kinase assembly factor MAT1

MacromoleculeName: CDK-activating kinase assembly factor MAT1 / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 38.13234 KDa
Recombinant expressionOrganism: Trichoplusia ni (cabbage looper)
SequenceString: MGSSHHHHHH ENLYFQSNAM DDQGCPRCKT TKYRNPSLKL MVNVCGHTLC ESCVDLLFVR GAGNCPECGT PLRKSNFRVQ LFEDPTVDK EVEIRKKVLK IYNKREEDFP SLREYNDFLE EVEEIVFNLT NNVDLDNTKK KMEIYQKENK DVIQKNKLKL T REQEELEE ...String:
MGSSHHHHHH ENLYFQSNAM DDQGCPRCKT TKYRNPSLKL MVNVCGHTLC ESCVDLLFVR GAGNCPECGT PLRKSNFRVQ LFEDPTVDK EVEIRKKVLK IYNKREEDFP SLREYNDFLE EVEEIVFNLT NNVDLDNTKK KMEIYQKENK DVIQKNKLKL T REQEELEE ALEVERQENE QRRLFIQKEE QLQQILKRKN KQAFLDELES SDLPVALLLA QHKDRSTQLE MQLEKPKPVK PV TFSTGIK MGQHISLAPI HKLEEALYEY QPLQIETYGP HVPELEMLGR LGYLNHVRAA SPQDLAGGYT SSLACHRALQ DAF SGLFWQ PS

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Macromolecule #2: Cyclin-H

MacromoleculeName: Cyclin-H / type: protein_or_peptide / ID: 2 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 37.695473 KDa
Recombinant expressionOrganism: Trichoplusia ni (cabbage looper)
SequenceString: MYHNSSQKRH WTFSSEEQLA RLRADANRKF RCKAVANGKV LPNDPVFLEP HEEMTLCKYY EKRLLEFCSV FKPAMPRSVV GTACMYFKR FYLNNSVMEY HPRIIMLTCA FLACKVDEFN VSSPQFVGNL RESPLGQEKA LEQILEYELL LIQQLNFHLI V HNPYRPFE ...String:
MYHNSSQKRH WTFSSEEQLA RLRADANRKF RCKAVANGKV LPNDPVFLEP HEEMTLCKYY EKRLLEFCSV FKPAMPRSVV GTACMYFKR FYLNNSVMEY HPRIIMLTCA FLACKVDEFN VSSPQFVGNL RESPLGQEKA LEQILEYELL LIQQLNFHLI V HNPYRPFE GFLIDLKTRY PILENPEILR KTADDFLNRI ALTDAYLLYT PSQIALTAIL SSASRAGITM ESYLSESLML KE NRTCLSQ LLDIMKSMRN LVKKYEPPRS EEVAVLKQKL ERCHSAELAL NVITKKRKGY EDDDYVSKKS KHEEEEWTDD DLV ESL

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Macromolecule #3: Cyclin-dependent kinase 7

MacromoleculeName: Cyclin-dependent kinase 7 / type: protein_or_peptide / ID: 3 / Number of copies: 1 / Enantiomer: LEVO / EC number: cyclin-dependent kinase
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 43.65107 KDa
Recombinant expressionOrganism: Trichoplusia ni (cabbage looper)
SequenceString: MASWSHPQFE KGGGSGGGSG GGSWSHPQFE KSGGGSENLY FQSNAMALDV KSRAKRYEKL DFLGEGQFAT VYKARDKNTN QIVAIKKIK LGHRSEAKDG INRTALREIK LLQELSHPNI IGLLDAFGHK SNISLVFDFM ETDLEVIIKD NSLVLTPSHI K AYMLMTLQ ...String:
MASWSHPQFE KGGGSGGGSG GGSWSHPQFE KSGGGSENLY FQSNAMALDV KSRAKRYEKL DFLGEGQFAT VYKARDKNTN QIVAIKKIK LGHRSEAKDG INRTALREIK LLQELSHPNI IGLLDAFGHK SNISLVFDFM ETDLEVIIKD NSLVLTPSHI K AYMLMTLQ GLEYLHQHWI LHRDLKPNNL LLDENGVLKL ADFGLAKSFG SPNRAYTHQV VTRWYRAPEL LFGARMYGVG VD MWAVGCI LAELLLRVPF LPGDSDLDQL TRIFETLGTP TEEQWPDMCS LPDYVTFKSF PGIPLHHIFS AAGDDLLDLI QGL FLFNPC ARITATQALK MKYFSNRPGP TPGCQLPRPN CPVETLKEQS NPALAIKRKR TEALEQGGLP KKLIF

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Macromolecule #4: (3R,4R)-4-[[[7-[(phenylmethyl)amino]-3-propan-2-yl-pyrazolo[1,5-a...

MacromoleculeName: (3R,4R)-4-[[[7-[(phenylmethyl)amino]-3-propan-2-yl-pyrazolo[1,5-a]pyrimidin-5-yl]amino]methyl]piperidin-3-ol
type: ligand / ID: 4 / Number of copies: 1 / Formula: I74
Molecular weightTheoretical: 394.513 Da
Chemical component information

ChemComp-I74:
(3R,4R)-4-[[[7-[(phenylmethyl)amino]-3-propan-2-yl-pyrazolo[1,5-a]pyrimidin-5-yl]amino]methyl]piperidin-3-ol

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Macromolecule #5: water

MacromoleculeName: water / type: ligand / ID: 5 / Number of copies: 73 / Formula: HOH
Molecular weightTheoretical: 18.015 Da
Chemical component information

ChemComp-HOH:
WATER / Water

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Experimental details

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Structure determination

Methodcryo EM
Processingsingle particle reconstruction
Aggregation stateparticle

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Sample preparation

Concentration0.2 mg/mL
BufferpH: 7.9
Component:
ConcentrationNameFormula
20.0 mMHEPES-KOH
200.0 mMPotassium chlorideKCl
2.0 mMMagnesium chlorideMgCl2
5.0 mMbeta-mercaptoethanol2-Mercaptoethanol
1.0 %Glycerol
GridModel: UltrAuFoil R1.2/1.3 / Material: GOLD / Mesh: 300 / Support film - Material: GOLD / Support film - topology: HOLEY / Pretreatment - Type: PLASMA CLEANING / Pretreatment - Atmosphere: AIR
VitrificationCryogen name: ETHANE-PROPANE / Chamber humidity: 100 % / Chamber temperature: 278 K / Instrument: FEI VITROBOT MARK IV
DetailsIncubated with 50 uM ICEC0942 for 5 min

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Electron microscopy

MicroscopeFEI TALOS ARCTICA
Electron beamAcceleration voltage: 200 kV / Electron source: FIELD EMISSION GUN
Electron opticsC2 aperture diameter: 50.0 µm / Calibrated magnification: 72886 / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELDBright-field microscopy / Cs: 2.7 mm / Nominal defocus max: 1.5 µm / Nominal defocus min: 0.5 µm
Sample stageSpecimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN
Image recording#0 - Image recording ID: 1 / #0 - Film or detector model: GATAN K3 (6k x 4k) / #0 - Number grids imaged: 1 / #0 - Number real images: 3571 / #0 - Average exposure time: 2.0 sec. / #0 - Average electron dose: 69.0 e/Å2
#0 - Details: Movies (69 frames) acquired in 3 x 3 pattern by image shift
#1 - Image recording ID: 2 / #1 - Film or detector model: GATAN K3 (6k x 4k) / #1 - Number grids imaged: 2 / #1 - Number real images: 5302 / #1 - Average exposure time: 2.0 sec. / #1 - Average electron dose: 69.0 e/Å2
#1 - Details: Movies (70 frames) acquired in 3 x 3 pattern by image shift
Experimental equipment
Model: Talos Arctica / Image courtesy: FEI Company

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Image processing

Particle selectionNumber selected: 10904715
CTF correctionSoftware:
Namedetails
CTFFIND (ver. 4.1)CTF determination
RELION (ver. 3.1)CTF correction

Details: Implemented in RELION 3.1
Startup modelType of model: EMDB MAP
EMDB ID:

22123

Initial angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: RELION (ver. 3.1)
Final 3D classificationNumber classes: 4 / Avg.num./class: 180000 / Software - Name: RELION (ver. 3.1)
Details: High-resolution, masked classification using 4 classes each for two datasets. One class from each dataset was selected, and the datasets were merged.
Final angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: RELION (ver. 3.1)
Final reconstructionNumber classes used: 2 / Applied symmetry - Point group: C1 (asymmetric) / Algorithm: FOURIER SPACE / Resolution.type: BY AUTHOR / Resolution: 2.5 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: RELION (ver. 3.1) / Number images used: 205478
Image recording ID1

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Atomic model buiding 1

Initial modelPDB ID:

6xbz

DetailsReal space refinement in PHENIX; ligand coordinates from PHENIX-OPLS3e refinement
RefinementSpace: REAL / Protocol: RIGID BODY FIT
Output model

PDB-7b5o:
Cryo-EM structure of the human CAK bound to ICEC0942 at 2.5 Angstroms resolution

PDB-7b5q:
Cryo-EM structure of the human CAK bound to ICEC0942 (PHENIX-OPLS3e)

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