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- EMDB-52758: Cryo-EM structure of CAK-CDK11 -

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Basic information

Entry
Database: EMDB / ID: EMD-52758
TitleCryo-EM structure of CAK-CDK11
Map dataPost-processed, sharpened map
Sample
  • Complex: CAK-CDK11 complex
    • Complex: CDK-activating kinase (CAK)
      • Protein or peptide: CDK-activating kinase assembly factor MAT1
      • Protein or peptide: Cyclin-H
      • Protein or peptide: Cyclin-dependent kinase 7
    • Complex: CDK11
      • Protein or peptide: Isoform 7 of Cyclin-dependent kinase 11B
  • Ligand: ADENOSINE-5'-DIPHOSPHATE
  • Ligand: MAGNESIUM ION
  • Ligand: water
KeywordsComplex / cell cycle / kinase / TRANSFERASE
Function / homology
Function and homology information


RNA polymerase II CTD heptapeptide repeat S5 kinase activity / ventricular system development / regulation of mRNA processing / snRNA transcription by RNA polymerase II / regulation of centrosome cycle / CAK-ERCC2 complex / transcription factor TFIIK complex / adult heart development / transcription factor TFIIH core complex / transcription factor TFIIH holo complex ...RNA polymerase II CTD heptapeptide repeat S5 kinase activity / ventricular system development / regulation of mRNA processing / snRNA transcription by RNA polymerase II / regulation of centrosome cycle / CAK-ERCC2 complex / transcription factor TFIIK complex / adult heart development / transcription factor TFIIH core complex / transcription factor TFIIH holo 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 / 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 / Formation of the Early Elongation Complex / Formation of the HIV-1 Early Elongation Complex / mRNA Capping / regulation of RNA splicing / RNA Polymerase I Transcription Initiation / regulation of G1/S transition of mitotic cell cycle / RNA polymerase II transcribes snRNA genes / ATP-dependent activity, acting on DNA / cyclin-dependent kinase / cyclin-dependent protein serine/threonine kinase activity / Tat-mediated elongation of the HIV-1 transcript / Formation of HIV-1 elongation complex containing HIV-1 Tat / Formation of HIV elongation complex in the absence of HIV Tat / Cyclin E associated events during G1/S transition / Cyclin A/B1/B2 associated events during G2/M transition / Cyclin A:Cdk2-associated events at S phase entry / cyclin-dependent protein kinase holoenzyme complex / RNA Polymerase II Transcription Elongation / Formation of RNA Pol II elongation complex / RNA Polymerase II Pre-transcription Events / positive regulation of smooth muscle cell proliferation / RNA polymerase II CTD heptapeptide repeat kinase activity / Recruitment of mitotic centrosome proteins and complexes / male germ cell nucleus / nucleotide-excision repair / TP53 Regulates Transcription of DNA Repair Genes / transcription initiation at RNA polymerase II promoter / RNA Polymerase I Promoter Escape / regulation of cell growth / G1/S transition of mitotic cell cycle / response to calcium ion / NoRC negatively regulates rRNA expression / Transcription-Coupled Nucleotide Excision Repair (TC-NER) / Formation of TC-NER Pre-Incision Complex / Formation of Incision Complex in GG-NER / fibrillar center / Dual incision in TC-NER / Gap-filling DNA repair synthesis and ligation in TC-NER / Cyclin D associated events in G1 / kinase activity / mitotic cell cycle / RUNX1 regulates transcription of genes involved in differentiation of HSCs / regulation of apoptotic process / transcription by RNA polymerase II / protein phosphorylation / protein kinase activity / regulation of cell cycle / protein stabilization / cell division / protein serine kinase activity / DNA repair / protein serine/threonine kinase activity / apoptotic process / regulation of DNA-templated transcription / regulation of transcription by RNA polymerase II / negative regulation of apoptotic process / perinuclear region of cytoplasm / positive regulation of transcription by RNA polymerase II / RNA binding / zinc ion binding / nucleoplasm / ATP binding / nucleus / plasma membrane / cytoplasm / cytosol
Similarity search - Function
Cyclin-dependent kinase 11/PITSLRE, catalytic domain / 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 ...Cyclin-dependent kinase 11/PITSLRE, catalytic domain / 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 11B / 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: 3.5 Å
AuthorsCushing VI / Greber BJ / McGeoch AJS / Feng J
Funding support United Kingdom, 2 items
OrganizationGrant numberCountry
Medical Research Council (MRC, United Kingdom)MR/V009354/1 United Kingdom
The Institute of Cancer Research (ICR) United Kingdom
CitationJournal: To Be Published
Title: Structural basis of T-loop-independent recognition and activation of CDKs by the CDK-activating kinase
Authors: Cushing VI / Greber BJ / McGeoch AJS / Feng J
History
DepositionFeb 6, 2025-
Header (metadata) releaseOct 15, 2025-
Map releaseOct 15, 2025-
UpdateOct 15, 2025-
Current statusOct 15, 2025Processing site: PDBe / Status: Released

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Structure visualization

Supplemental images

emd_52758.png

Downloads & links

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Map

FileDownload / File: emd_52758.map.gz / Format: CCP4 / Size: 22.2 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationPost-processed, sharpened map
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
1.02 Å/pix.
x 180 pix.
= 183.6 Å		1.02 Å/pix.
x 180 pix.
= 183.6 Å		1.02 Å/pix.
x 180 pix.
= 183.6 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 1.02 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.006
Minimum - Maximum-0.025272317 - 0.043066222
Average (Standard dev.)0.000032117303 (±0.0017082978)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions180180180
Spacing180180180
CellA=B=C: 183.59999 Å
α=β=γ: 90.0 °

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Supplemental data

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Mask #1

Fileemd_52758_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_52758_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_52758_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 : CAK-CDK11 complex

EntireName: CAK-CDK11 complex
Components
  • Complex: CAK-CDK11 complex
    • Complex: CDK-activating kinase (CAK)
      • Protein or peptide: CDK-activating kinase assembly factor MAT1
      • Protein or peptide: Cyclin-H
      • Protein or peptide: Cyclin-dependent kinase 7
    • Complex: CDK11
      • Protein or peptide: Isoform 7 of Cyclin-dependent kinase 11B
  • Ligand: ADENOSINE-5'-DIPHOSPHATE
  • Ligand: MAGNESIUM ION
  • Ligand: water

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Supramolecule #1: CAK-CDK11 complex

SupramoleculeName: CAK-CDK11 complex / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#4
Details: CDK-activating kinase (CAK) bound to CDK11B (p58) in the presence of ADP
Molecular weightTheoretical: 50 KDa

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Supramolecule #2: CDK-activating kinase (CAK)

SupramoleculeName: CDK-activating kinase (CAK) / type: complex / ID: 2 / Parent: 1 / Macromolecule list: #2-#4 / Details: CAK complex bound to ADP
Source (natural)Organism: Homo sapiens (human)

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Supramolecule #3: CDK11

SupramoleculeName: CDK11 / type: complex / ID: 3 / Parent: 1 / Macromolecule list: #1 / Details: CDK11B (p58)
Source (natural)Organism: Homo sapiens (human)

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Macromolecule #1: Isoform 7 of Cyclin-dependent kinase 11B

MacromoleculeName: Isoform 7 of Cyclin-dependent kinase 11B / type: protein_or_peptide / ID: 1 / Details: CDK11B (p58) / Number of copies: 1 / Enantiomer: LEVO / EC number: cyclin-dependent kinase
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 49.970613 KDa
Recombinant expressionOrganism: Trichoplusia ni (cabbage looper)
SequenceString: SNAMSEDEER ENENHLLVVP ESRFDRDSGE SEEAEEEVGE GTPQSSALTE GDYVPDSPAL SPIELKQELP KYLPALQGCR SVEEFQCLN RIEEGTYGVV YRAKDKKTDE IVALKRLKME KEKEGFPITS LREINTILKA QHPNIVTVRE IVVGSNMDKI Y IVMNYVEH ...String:
SNAMSEDEER ENENHLLVVP ESRFDRDSGE SEEAEEEVGE GTPQSSALTE GDYVPDSPAL SPIELKQELP KYLPALQGCR SVEEFQCLN RIEEGTYGVV YRAKDKKTDE IVALKRLKME KEKEGFPITS LREINTILKA QHPNIVTVRE IVVGSNMDKI Y IVMNYVEH DLKSLMETMK QPFLPGEVKT LMIQLLRGVK HLHDNWILHR DLKTSNLLLS HAGILKVGDF GLAREYGSPL KA Y(TPO)PVVVT LWYRAPELLL GAKEYSTAVD MWSVGCIFGE LLTQKPLFPG KSEIDQINKV FKDLGTPSEK IWPGYSELP AVKKMTFSEH PYNNLRKRFG ALLSDQGFDL MNKFLTYFPG RRISAEDGLK HEYFRETPLP IDPSMFPTWP AKSEQQRVKR GTSPRPPEG GLGYSQLGDD DLKETGFHLT TTNQGASAAG PGFSLKF

UniProtKB: Cyclin-dependent kinase 11B

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Macromolecule #2: CDK-activating kinase assembly factor MAT1

MacromoleculeName: CDK-activating kinase assembly factor MAT1 / type: protein_or_peptide / ID: 2 / 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

UniProtKB: CDK-activating kinase assembly factor MAT1

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Macromolecule #3: Cyclin-H

MacromoleculeName: Cyclin-H / type: protein_or_peptide / ID: 3 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 37.721508 KDa
Recombinant expressionOrganism: Trichoplusia ni (cabbage looper)
SequenceString: (ACE)MYHNSSQKR HWTFSSEEQL ARLRADANRK FRCKAVANGK VLPNDPVFLE PHEEMTLCKY YEKRLLEFCS VFKPAM PRS VVGTACMYFK RFYLNNSVME YHPRIIMLTC AFLACKVDEF NVSSPQFVGN LRESPLGQEK ALEQILEYEL LLIQQLN FH LIVHNPYRPF ...String:
(ACE)MYHNSSQKR HWTFSSEEQL ARLRADANRK FRCKAVANGK VLPNDPVFLE PHEEMTLCKY YEKRLLEFCS VFKPAM PRS VVGTACMYFK RFYLNNSVME YHPRIIMLTC AFLACKVDEF NVSSPQFVGN LRESPLGQEK ALEQILEYEL LLIQQLN FH LIVHNPYRPF EGFLIDLKTR YPILENPEIL RKTADDFLNR IALTDAYLLY TPSQIALTAI LSSASRAGIT MESYLSES L MLKENRTCLS QLLDIMKSMR NLVKKYEPPR SEEVAVLKQK LERCHSAELA LNVITKKRKG YEDDDYVSKK SKHEEEEWT DDDLVESL

UniProtKB: Cyclin-H

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Macromolecule #4: Cyclin-dependent kinase 7

MacromoleculeName: Cyclin-dependent kinase 7 / type: protein_or_peptide / ID: 4 / Number of copies: 1 / Enantiomer: LEVO / EC number: cyclin-dependent kinase
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 43.65107 KDa
Recombinant expressionOrganism: Escherichia coli (E. coli)
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

UniProtKB: Cyclin-dependent kinase 7

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Macromolecule #5: ADENOSINE-5'-DIPHOSPHATE

MacromoleculeName: ADENOSINE-5'-DIPHOSPHATE / type: ligand / ID: 5 / Number of copies: 2 / Formula: ADP
Molecular weightTheoretical: 427.201 Da
Chemical component information

ChemComp-ADP:
ADENOSINE-5'-DIPHOSPHATE / ADP, energy-carrying molecule*YM

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Macromolecule #6: MAGNESIUM ION

MacromoleculeName: MAGNESIUM ION / type: ligand / ID: 6 / Number of copies: 2 / Formula: MG
Molecular weightTheoretical: 24.305 Da

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Macromolecule #7: water

MacromoleculeName: water / type: ligand / ID: 7 / Number of copies: 1 / Formula: HOH
Molecular weightTheoretical: 18.015 Da
Chemical component information

ChemComp-HOH:
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

Concentration0.5 mg/mL
BufferpH: 7.9
Component:
ConcentrationNameFormula
20.0 mMHEPES-KOH
200.0 mMPotassium chlorideKCl
2.0 mMMagnesium chlorideMgCl2
GridModel: UltrAuFoil R1.2/1.3 / Material: GOLD / Mesh: 300 / Support film - Material: GOLD / Support film - topology: HOLEY / Pretreatment - Type: PLASMA CLEANING / Pretreatment - Time: 50 sec.
VitrificationCryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 278 K / Instrument: FEI VITROBOT MARK IV

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Electron microscopy

MicroscopeTFS KRIOS
Specialist opticsEnergy filter - Name: GIF Bioquantum
Image recordingFilm or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Number grids imaged: 1 / Number real images: 7049 / Average electron dose: 70.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.7 mm / Nominal defocus max: 2.0 µm / Nominal defocus min: 0.7000000000000001 µm / Nominal magnification: 165000
Sample stageSpecimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

CTF correctionSoftware: (Name: cryoSPARC, RELION (ver. 5.0)) / Type: PHASE FLIPPING AND AMPLITUDE CORRECTION
Startup modelType of model: NONE
Final reconstructionAlgorithm: FOURIER SPACE / Resolution.type: BY AUTHOR / Resolution: 3.5 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: RELION / Number images used: 31743
Initial angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: RELION (ver. 5.0)
Final angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: RELION (ver. 5.0)
Final 3D classificationNumber classes: 4 / Software - Name: RELION (ver. 5.0)

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Atomic model buiding 1

Initial model
PDB IDChain

8p6y

source_name: PDB, initial_model_type: experimental model
chain_id: K, source_name: AlphaFold, initial_model_type: in silico model
RefinementSpace: REAL / Protocol: RIGID BODY FIT
Output model

PDB-9i9i:
Cryo-EM structure of CAK-CDK11

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