21tw

Cryo-EM structure of TNF-alpha in complex with two anti-TNF-alpha nanobodies, TNF30, derived from the TNF-alpha inhibitor Ozoralizumab (OZR)

Method: ELECTRON MICROSCOPY Dmax: 88.4 Å Quality: GOOD

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

Tumor necrosis factor

Homo sapiens

UniProt P01375

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 × 4 PDB declaration: tetrameric(4) Consistent with protein copy count Chain B; UniProt 77–233 Chain C; UniProt 77–233 Chain D; UniProt 77–233 Not recorded anti-TNF-alpha nanobodies, TNF30, derived from Ozoralizumab (OZR) × 1 ELECTRON MICROSCOPY cryo-EM buffer:pH 7 cryo-EM vitrification conditions:Cryogen ETHANE Resolution 2.43 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.

49 other PDB entries and 98 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name TNFA_HUMAN
Isoform
PDB entities 2
Chains and sequence ranges Author chain B; PDBConstruct 2–158; UniProt 77–233 Author chain C; PDBConstruct 2–158; UniProt 77–233 Author chain D; PDBConstruct 2–158; UniProt 77–233

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 21tw

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 21tw
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2. Structure Basics 2. Structure Basics

Entry ID entry_id21tw
Deposition date deposition_date2025-12-24
Structure title titleCryo-EM structure of TNF-alpha in complex with two anti-TNF-alpha nanobodies, TNF30, derived from the TNF-alpha inhibitor Ozoralizumab (OZR)
Keywords keywordsNANOBODY, VHH, TNF-alpha, HSA, Ozoralizumab, OZR, CYTOKINE; CYTOKINE
Experimental Method methodELECTRON MICROSCOPY

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

Radius of gyration Rg (Guinier) rg_guinier26.76
Radius of gyration Rg (electron density) rg_electron25.81
Forward intensity I(0) i076916800.00
Molecular weight molecular_weight70479.0 kDa
Excluded volume excluded_volume88799 ų
Envelope volume envelope_volume99688 ų
Hydration-shell volume shell_volume32345 ų
Envelope diameter envelope_diameter94.2
Shell Rg shell_rg32.99
Envelope Rg envelope_rg26.33
Shape Rg shape_rg25.77
Total Rg total_rg26.65
Total atoms total_atoms4979
Residues n_residues638
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 dmax88.4
Rg (real space) rg_real26.75
Rg uncertainty (real space) rg_real_error0.55
I(0) (real space) i0_real7.6920e+07
I(0) uncertainty (real space) i0_real_error1.0610e+06
Rg (reciprocal space) rg_reciprocal26.75
I(0) (reciprocal space) i0_reciprocal76920000.0000
Solution quality estimate total_estimate0.8826
Solution quality rating solution_quality GOOD a GOOD solution
P(r) peaks n_peaks1
Primary peak position r_peak_primary33.0
Skewness Skewness skewness0.376
Kurtosis Kurtosis kurtosis-0.261
Angular range angular_range— – 0.2950 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha30650000.0000
Real-space data points n_real_points60
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.844; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.983; Smooth: 0.956

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (2)

8. Citations (1)

9. Files and Curves (10)