9qcv

Cryo-EM structure of CAK-CDK2-cyclin A2 bound to AMP-PNP

Method: ELECTRON MICROSCOPY Dmax: 118.3 Å Quality: REASONABLE

1. Protein Identity and Related Structures Protein Identity & Related Structures

Cyclin-dependent kinase 2

Homo sapiens

UniProt P24941

State in the Current Structure

Assembly Oligomeric State Construct Mutations and Modifications Ligands, Ions and Associated Components Method and Experimental Conditions Structure Quality
1 Protein heterocomplex Heteromer Protein × 5 PDB declaration: pentameric(5) Consistent with protein copy count Chain K; UniProt 1–298 Not recorded Cyclin-A2 × 1 (P20248) CDK-activating kinase assembly factor MAT1 × 1 (P51948) Cyclin-H × 1 (P51946) Cyclin-dependent kinase 7 × 1 (P50613) ANP PHOSPHOAMINOPHOSPHONIC ACID-ADENYLATE ESTER × 2 MG MAGNESIUM ION × 2 ELECTRON MICROSCOPY cryo-EM buffer:pH 7.5 cryo-EM vitrification conditions:Cryogen ETHANE Resolution 2.50 Å

Other States of the Same Protein in the Database

Each row is a biological assembly of the same UniProt protein in another PDB entry. The “Difference from current entry” column identifies evidence-level differences; no tag means the currently parsed fields agree.

518 other PDB entries and 664 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name CDK2_HUMAN
Isoform
PDB entities 1
Chains and sequence ranges Author chain K; PDBConstruct 4–301; UniProt 1–298

Cyclin-A2

Homo sapiens

UniProt P20248

State in the Current Structure

Assembly Oligomeric State Construct Mutations and Modifications Ligands, Ions and Associated Components Method and Experimental Conditions Structure Quality
1 Protein heterocomplex Heteromer Protein × 5 PDB declaration: pentameric(5) Consistent with protein copy count Chain L; UniProt 1–432 Not recorded Cyclin-dependent kinase 2 × 1 (P24941) CDK-activating kinase assembly factor MAT1 × 1 (P51948) Cyclin-H × 1 (P51946) Cyclin-dependent kinase 7 × 1 (P50613) ANP PHOSPHOAMINOPHOSPHONIC ACID-ADENYLATE ESTER × 2 MG MAGNESIUM ION × 2 ELECTRON MICROSCOPY cryo-EM buffer:pH 7.5 cryo-EM vitrification conditions:Cryogen ETHANE Resolution 2.50 Å

Other States of the Same Protein in the Database

Each row is a biological assembly of the same UniProt protein in another PDB entry. The “Difference from current entry” column identifies evidence-level differences; no tag means the currently parsed fields agree.

113 other PDB entries and 212 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name CCNA2_HUMAN
Isoform
PDB entities 2
Chains and sequence ranges Author chain L; PDBConstruct 4–435; UniProt 1–432

CDK-activating kinase assembly factor MAT1

Homo sapiens

UniProt P51948

State in the Current Structure

Assembly Oligomeric State Construct Mutations and Modifications Ligands, Ions and Associated Components Method and Experimental Conditions Structure Quality
1 Protein heterocomplex Heteromer Protein × 5 PDB declaration: pentameric(5) Consistent with protein copy count Chain H; UniProt 1–309 Not recorded Cyclin-dependent kinase 2 × 1 (P24941) Cyclin-A2 × 1 (P20248) Cyclin-H × 1 (P51946) Cyclin-dependent kinase 7 × 1 (P50613) ANP PHOSPHOAMINOPHOSPHONIC ACID-ADENYLATE ESTER × 2 MG MAGNESIUM ION × 2 ELECTRON MICROSCOPY cryo-EM buffer:pH 7.5 cryo-EM vitrification conditions:Cryogen ETHANE Resolution 2.50 Å

Other States of the Same Protein in the Database

Each row is a biological assembly of the same UniProt protein in another PDB entry. The “Difference from current entry” column identifies evidence-level differences; no tag means the currently parsed fields agree.

66 other PDB entries and 68 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name MAT1_HUMAN
Isoform P51948-1
PDB entities 3
Chains and sequence ranges Author chain H; PDBConstruct 20–328; UniProt 1–309

Cyclin-H

Homo sapiens

UniProt P51946

State in the Current Structure

Assembly Oligomeric State Construct Mutations and Modifications Ligands, Ions and Associated Components Method and Experimental Conditions Structure Quality
1 Protein heterocomplex Heteromer Protein × 5 PDB declaration: pentameric(5) Consistent with protein copy count Chain I; UniProt 1–323 Non-standard monomer:Yes (specific site not provided by mmCIF) Cyclin-dependent kinase 2 × 1 (P24941) Cyclin-A2 × 1 (P20248) CDK-activating kinase assembly factor MAT1 × 1 (P51948) Cyclin-dependent kinase 7 × 1 (P50613) ANP PHOSPHOAMINOPHOSPHONIC ACID-ADENYLATE ESTER × 2 MG MAGNESIUM ION × 2 ELECTRON MICROSCOPY cryo-EM buffer:pH 7.5 cryo-EM vitrification conditions:Cryogen ETHANE Resolution 2.50 Å

Other States of the Same Protein in the Database

Each row is a biological assembly of the same UniProt protein in another PDB entry. The “Difference from current entry” column identifies evidence-level differences; no tag means the currently parsed fields agree.

46 other PDB entries and 47 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name CCNH_HUMAN
Isoform
PDB entities 4
Chains and sequence ranges Author chain I; PDBConstruct 2–324; UniProt 1–323

Cyclin-dependent kinase 7

Homo sapiens

UniProt P50613

State in the Current Structure

Assembly Oligomeric State Construct Mutations and Modifications Ligands, Ions and Associated Components Method and Experimental Conditions Structure Quality
1 Protein heterocomplex Heteromer Protein × 5 PDB declaration: pentameric(5) Consistent with protein copy count Chain J; UniProt 1–346 Not recorded Cyclin-dependent kinase 2 × 1 (P24941) Cyclin-A2 × 1 (P20248) CDK-activating kinase assembly factor MAT1 × 1 (P51948) Cyclin-H × 1 (P51946) ANP PHOSPHOAMINOPHOSPHONIC ACID-ADENYLATE ESTER × 2 MG MAGNESIUM ION × 2 ELECTRON MICROSCOPY cryo-EM buffer:pH 7.5 cryo-EM vitrification conditions:Cryogen ETHANE Resolution 2.50 Å

Other States of the Same Protein in the Database

Each row is a biological assembly of the same UniProt protein in another PDB entry. The “Difference from current entry” column identifies evidence-level differences; no tag means the currently parsed fields agree.

53 other PDB entries and 64 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name CDK7_HUMAN
Isoform
PDB entities 5
Chains and sequence ranges Author chain J; PDBConstruct 46–391; UniProt 1–346

The page prioritizes protein identity, the current assembly, associated components, oligomeric state and cross-PDB links. Chain mapping and sequence ranges are retained as data evidence. Internal IDs, import timestamps and assembly operation expressions are maintenance fields and are not shown here.

SAXS scattering curve SAXS Profile

SAXS profile for 9qcv

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 9qcv
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2. Structure Basics 2. Structure Basics

Entry ID entry_id9qcv
Deposition date deposition_date2025-03-05
Structure title titleCryo-EM structure of CAK-CDK2-cyclin A2 bound to AMP-PNP
Keywords keywordsComplex, cell cycle, kinase, TRANSFERASE; TRANSFERASE
Experimental Method methodELECTRON MICROSCOPY

3. SAXS Parameters (CRYSOL theoretical calculation) 3. SAXS Parameters (CRYSOL)

Radius of gyration Rg (Guinier) rg_guinier35.31
Radius of gyration Rg (electron density) rg_electron34.83
Forward intensity I(0) i0274358000.00
Molecular weight molecular_weight137930.0 kDa
Excluded volume excluded_volume174510 ų
Envelope volume envelope_volume219930 ų
Hydration-shell volume shell_volume52486 ų
Envelope diameter envelope_diameter123.2
Shell Rg shell_rg41.32
Envelope Rg envelope_rg34.61
Shape Rg shape_rg34.80
Total Rg total_rg35.36
Total atoms total_atoms9710
Residues n_residues1197
Spherical-harmonic order n_harmonics20
q range q_range— – 0.5000 −1
Data points n_points101
Shell type shell_typedirectional
Solvent electron density solvent_density0.3340 e/ų
Shell contrast contrast_shell0.0300 e/ų
CRYSOL version crysol_version4.1.3

4. P(r) Distance Distribution (GNOM inversion) 4. P(r) Analysis (GNOM)

Maximum dimension Dmax dmax118.3
Rg (real space) rg_real35.32
Rg uncertainty (real space) rg_real_error0.81
I(0) (real space) i0_real2.7440e+08
I(0) uncertainty (real space) i0_real_error4.9330e+06
Rg (reciprocal space) rg_reciprocal35.32
I(0) (reciprocal space) i0_reciprocal274400000.0000
Solution quality estimate total_estimate0.6807
Solution quality rating solution_quality REASONABLE a REASONABLE solution
P(r) peaks n_peaks1
Primary peak position r_peak_primary42.1
Skewness Skewness skewness0.405
Kurtosis Kurtosis kurtosis-0.132
Angular range angular_range— – 0.2250 −1
Current regularization parameter α current_alpha0.0002
Highest regularization parameter α highest_alpha92770000.0000
Real-space data points n_real_points46
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.821; Stabil: 1.000; Sysdev: 0.186; Positv: 1.000; Valcen: 0.999; Smooth: 0.824

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (8)

8. Citations (1)

9. Files and Curves (10)