7qe8

Human cationic trypsin (TRY1) complexed with serine protease inhibitor Kazal type 1 (SPINK1)

Method: X-RAY DIFFRACTION Dmax: 96.8 Å Quality: GOOD

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

Trypsin-1

Homo sapiens

UniProt P07477

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 × 2 PDB declaration: dimeric(2) Consistent with protein copy count Chain A; UniProt 24–247 Mutation:S200A Serine protease inhibitor Kazal-type 1 × 1 (P00995) SO4 SULFATE ION × 1 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, HANGING DROP;pH 7.4;293 K;1 ul protein solution (20 mg/mL in 20 mM HEPES, pH 7.4, 150 mM NaCl) + 1 ul well solution (15% PEG 4000, 0.3 M AS), cryo 15% PEG 4000, 0.3 M AS, 8% PEG 400 Resolution 2.90 Å R-free 0.243
2 Protein heterocomplex Heteromer Protein × 2 PDB declaration: dimeric(2) Consistent with protein copy count Chain B; UniProt 24–247 Mutation:S200A Serine protease inhibitor Kazal-type 1 × 1 (P00995) SO4 SULFATE ION × 2 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, HANGING DROP;pH 7.4;293 K;1 ul protein solution (20 mg/mL in 20 mM HEPES, pH 7.4, 150 mM NaCl) + 1 ul well solution (15% PEG 4000, 0.3 M AS), cryo 15% PEG 4000, 0.3 M AS, 8% PEG 400 Resolution 2.90 Å R-free 0.243

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.

11 other PDB entries and 15 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name TRY1_HUMAN
Isoform
PDB entities 1
Chains and sequence ranges Author chain A; PDBConstruct 1–224; UniProt 24–247 Author chain B; PDBConstruct 1–224; UniProt 24–247

Serine protease inhibitor Kazal-type 1

Homo sapiens

UniProt P00995

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 × 2 PDB declaration: dimeric(2) Consistent with protein copy count Chain D; UniProt 24–79 Not recorded Trypsin-1 × 1 (P07477) SO4 SULFATE ION × 1 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, HANGING DROP;pH 7.4;293 K;1 ul protein solution (20 mg/mL in 20 mM HEPES, pH 7.4, 150 mM NaCl) + 1 ul well solution (15% PEG 4000, 0.3 M AS), cryo 15% PEG 4000, 0.3 M AS, 8% PEG 400 Resolution 2.90 Å R-free 0.243
2 Protein heterocomplex Heteromer Protein × 2 PDB declaration: dimeric(2) Consistent with protein copy count Chain C; UniProt 24–79 Not recorded Trypsin-1 × 1 (P07477) SO4 SULFATE ION × 2 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, HANGING DROP;pH 7.4;293 K;1 ul protein solution (20 mg/mL in 20 mM HEPES, pH 7.4, 150 mM NaCl) + 1 ul well solution (15% PEG 4000, 0.3 M AS), cryo 15% PEG 4000, 0.3 M AS, 8% PEG 400 Resolution 2.90 Å R-free 0.243

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.

4 other PDB entries and 5 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name ISK1_HUMAN
Isoform
PDB entities 2
Chains and sequence ranges Author chain C; PDBConstruct 1–56; UniProt 24–79 Author chain D; PDBConstruct 1–56; UniProt 24–79

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 7qe8

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 7qe8
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2. Structure Basics 2. Structure Basics

Entry ID entry_id7qe8
Deposition date deposition_date2021-12-01
Structure title titleHuman cationic trypsin (TRY1) complexed with serine protease inhibitor Kazal type 1 (SPINK1)
Keywords keywordsTRY1, SPINK1, serine protease, protease-inhibitor complex, catalytic triad, HYDROLASE; HYDROLASE
Experimental Method methodX-RAY DIFFRACTION

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

Radius of gyration Rg (Guinier) rg_guinier28.76
Radius of gyration Rg (electron density) rg_electron28.09
Forward intensity I(0) i065657300.00
Molecular weight molecular_weight60520.0 kDa
Excluded volume excluded_volume74502 ų
Envelope volume envelope_volume92062 ų
Hydration-shell volume shell_volume28309 ų
Envelope diameter envelope_diameter103.2
Shell Rg shell_rg34.27
Envelope Rg envelope_rg28.42
Shape Rg shape_rg28.05
Total Rg total_rg28.80
Total atoms total_atoms4229
Residues n_residues557
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 dmax96.8
Rg (real space) rg_real28.92
Rg uncertainty (real space) rg_real_error0.86
I(0) (real space) i0_real6.5660e+07
I(0) uncertainty (real space) i0_real_error1.0360e+06
Rg (reciprocal space) rg_reciprocal28.85
I(0) (reciprocal space) i0_reciprocal65650000.0000
Solution quality estimate total_estimate0.8398
Solution quality rating solution_quality GOOD a GOOD solution
P(r) peaks n_peaks2
Primary peak position r_peak_primary26.4
Skewness Skewness skewness0.454
Kurtosis Kurtosis kurtosis-0.501
Angular range angular_range— – 0.2750 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha21640000.0000
Real-space data points n_real_points56
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.742; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.736; Smooth: 0.952

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (4)

7. Fold Classification (SCOP + CATH) 4 domains

CATH v4.4 (4 domains)

Domain ID domain_id7qe8A01
Class class2 — Mainly Beta
Architecture architecture40 — Beta Barrel
Topology topology10 — Thrombin, subunit H
Homologous superfamily homologous superfamily10 — Trypsin-like serine proteases
Domain ID domain_id7qe8A02
Class class2 — Mainly Beta
Architecture architecture40 — Beta Barrel
Topology topology10 — Thrombin, subunit H
Homologous superfamily homologous superfamily10 — Trypsin-like serine proteases
Domain ID domain_id7qe8B01
Class class2 — Mainly Beta
Architecture architecture40 — Beta Barrel
Topology topology10 — Thrombin, subunit H
Homologous superfamily homologous superfamily10 — Trypsin-like serine proteases
Domain ID domain_id7qe8B02
Class class2 — Mainly Beta
Architecture architecture40 — Beta Barrel
Topology topology10 — Thrombin, subunit H
Homologous superfamily homologous superfamily10 — Trypsin-like serine proteases

8. Citations (1)

9. Files and Curves (10)