9tyh

Structure of the MAP2K MEK1 in an active conformation in complex with its substrate MAPK ERK2

Method: ELECTRON MICROSCOPY Dmax: 91.2 Å Quality: GOOD

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

Mitogen-activated protein kinase 1

Homo sapiens

UniProt P28482

State in the Current Structure

Assembly Oligomeric State Construct Mutations and Modifications Ligands, Ions and Associated Components Method and Experimental Conditions Structure Quality
1 Insufficient information Heteromer Protein × 2 PDB declaration: dimeric(2) Consistent with protein copy count Chain B; UniProt 1–360 Mutation:Thr185Val ;Dual specificity mitogen-activated protein kinase kinase 1,Uncharacterized protein,Dual specificity mitogen-activated protein kinase kinase 1 ; × 1 (Q02750,A0A125YG37) ADP ADENOSINE-5'-DIPHOSPHATE × 2 ELECTRON MICROSCOPY cryo-EM buffer:pH 7.5 cryo-EM vitrification conditions:Cryogen ETHANE Resolution 3.40 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.

158 other PDB entries and 177 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name MK01_HUMAN
Isoform
PDB entities 1
Chains and sequence ranges Author chain B; PDBConstruct 4–363; UniProt 1–360

;Dual specificity mitogen-activated protein kinase kinase 1,Uncharacterized protein,Dual specificity mitogen-activated protein kinase kinase 1 ;

Toxoplasma gondii ME49

UniProt A0A125YG37

State in the Current Structure

Assembly Oligomeric State Construct Mutations and Modifications Ligands, Ions and Associated Components Method and Experimental Conditions Structure Quality
1 Insufficient information Heteromer Protein × 2 PDB declaration: dimeric(2) Consistent with protein copy count Chain A; UniProt 441–455 Mutation:residue 3-11 replaced with GRA24 KIM (15 residues),Ser218Asp,Ser222Asp Mitogen-activated protein kinase 1 × 1 (P28482) ADP ADENOSINE-5'-DIPHOSPHATE × 2 ELECTRON MICROSCOPY cryo-EM buffer:pH 7.5 cryo-EM vitrification conditions:Cryogen ETHANE Resolution 3.40 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.

2 other PDB entries and 2 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name A0A125YG37_TOXGM
Isoform
PDB entities 2
Chains and sequence ranges Author chain A; PDBConstruct 3–17; UniProt 441–455

;Dual specificity mitogen-activated protein kinase kinase 1,Uncharacterized protein,Dual specificity mitogen-activated protein kinase kinase 1 ;

Toxoplasma gondii ME49

UniProt Q02750

State in the Current Structure

Assembly Oligomeric State Construct Mutations and Modifications Ligands, Ions and Associated Components Method and Experimental Conditions Structure Quality
1 Insufficient information Heteromer Protein × 2 PDB declaration: dimeric(2) Consistent with protein copy count Chain A; UniProt 1–2 Chain A; UniProt 12–393 Mutation:residue 3-11 replaced with GRA24 KIM (15 residues),Ser218Asp,Ser222Asp Mitogen-activated protein kinase 1 × 1 (P28482) ADP ADENOSINE-5'-DIPHOSPHATE × 2 ELECTRON MICROSCOPY cryo-EM buffer:pH 7.5 cryo-EM vitrification conditions:Cryogen ETHANE Resolution 3.40 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.

92 other PDB entries and 122 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name MP2K1_HUMAN
Isoform
PDB entities 2
Chains and sequence ranges Author chain A; PDBConstruct 1–2; UniProt 1–2 Author chain A; PDBConstruct 18–399; UniProt 12–393

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 9tyh

P(r) Distance Distribution P(r) Distribution

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

Entry ID entry_id9tyh
Deposition date deposition_date2026-01-19
Structure title titleStructure of the MAP2K MEK1 in an active conformation in complex with its substrate MAPK ERK2
Keywords keywordsprotein kinases, phosphoryl transfer, MAPK, MAP2K, cancer signaling, SIGNALING PROTEIN; SIGNALING PROTEIN
Experimental Method methodELECTRON MICROSCOPY

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

Radius of gyration Rg (Guinier) rg_guinier28.69
Radius of gyration Rg (electron density) rg_electron27.86
Forward intensity I(0) i083114100.00
Molecular weight molecular_weight72688.0 kDa
Excluded volume excluded_volume91506 ų
Envelope volume envelope_volume112660 ų
Hydration-shell volume shell_volume33746 ų
Envelope diameter envelope_diameter91.6
Shell Rg shell_rg35.08
Envelope Rg envelope_rg27.52
Shape Rg shape_rg27.87
Total Rg total_rg28.56
Total atoms total_atoms10217
Residues n_residues628
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 dmax91.2
Rg (real space) rg_real28.64
Rg uncertainty (real space) rg_real_error0.57
I(0) (real space) i0_real8.3110e+07
I(0) uncertainty (real space) i0_real_error1.2640e+06
Rg (reciprocal space) rg_reciprocal28.67
I(0) (reciprocal space) i0_reciprocal83120000.0000
Solution quality estimate total_estimate0.8990
Solution quality rating solution_quality GOOD a GOOD solution
P(r) peaks n_peaks1
Primary peak position r_peak_primary33.2
Skewness Skewness skewness0.263
Kurtosis Kurtosis kurtosis-0.485
Angular range angular_range— – 0.2750 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha26440000.0000
Real-space data points n_real_points56
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.934; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.993; Smooth: 0.886

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (3)

8. Citations (1)

9. Files and Curves (10)