3i29

Crystal structure of a binary complex between an mutant trypsin inhibitor with bovine trypsin

Method: X-RAY DIFFRACTION Dmax: 77.5 Å Quality: GOOD

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

Cationic trypsin

Bos taurus

UniProt P00760

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 24–246 Not recorded Chymotrypsin inhibitor 3 × 1 (P10822) CA CALCIUM ION × 1 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, HANGING DROP;pH 8;298 K;pH 8.0, VAPOR DIFFUSION, HANGING DROP, temperature 298K Resolution 2.40 Å R-free 0.287

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.

608 other PDB entries and 770 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name TRY1_BOVIN
Isoform
PDB entities 1
Chains and sequence ranges Author chain A; PDBConstruct 1–223; UniProt 24–246

Chymotrypsin inhibitor 3

Psophocarpus tetragonolobus

UniProt P10822

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 B; UniProt 25–207 Mutation:F64Y, L65R Cationic trypsin × 1 (P00760) CA CALCIUM ION × 1 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, HANGING DROP;pH 8;298 K;pH 8.0, VAPOR DIFFUSION, HANGING DROP, temperature 298K Resolution 2.40 Å R-free 0.287

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.

19 other PDB entries and 35 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name ICW3_PSOTE
Isoform
PDB entities 2
Chains and sequence ranges Author chain B; PDBConstruct 5–187; UniProt 25–207

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 3i29

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 3i29
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2. Structure Basics 2. Structure Basics

Entry ID entry_id3i29
Deposition date deposition_date2009-06-29
Structure title titleCrystal structure of a binary complex between an mutant trypsin inhibitor with bovine trypsin
Keywords keywords;P1 and P2 MUTANT, TRYPSIN INHIBITOR, BOVINE TRYPSIN, COMPLEX, DIGESTION, HYDROLASE, METAL-BINDING, PROTEASE, SECRETED, SERINE PROTEASE, ZYMOGEN, PROTEASE INHIBITOR, SERINE PROTEASE INHIBITOR, HYDROLASE-HYDROLASE INHIBITOR COMPLEX, Disulfide bond ;; HYDROLASE/HYDROLASE INHIBITOR
Experimental Method methodX-RAY DIFFRACTION

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

Radius of gyration Rg (Guinier) rg_guinier22.59
Radius of gyration Rg (electron density) rg_electron21.66
Forward intensity I(0) i031911800.00
Molecular weight molecular_weight42803.0 kDa
Excluded volume excluded_volume53237 ų
Envelope volume envelope_volume61139 ų
Hydration-shell volume shell_volume23649 ų
Envelope diameter envelope_diameter80.2
Shell Rg shell_rg28.32
Envelope Rg envelope_rg21.93
Shape Rg shape_rg21.64
Total Rg total_rg22.49
Total atoms total_atoms3003
Residues n_residues395
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 dmax77.5
Rg (real space) rg_real22.58
Rg uncertainty (real space) rg_real_error0.46
I(0) (real space) i0_real3.1910e+07
I(0) uncertainty (real space) i0_real_error4.0220e+05
Rg (reciprocal space) rg_reciprocal22.59
I(0) (reciprocal space) i0_reciprocal31910000.0000
Solution quality estimate total_estimate0.8669
Solution quality rating solution_quality GOOD a GOOD solution
P(r) peaks n_peaks2
Primary peak position r_peak_primary25.8
Skewness Skewness skewness0.392
Kurtosis Kurtosis kurtosis-0.264
Angular range angular_range— – 0.3500 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha8772000.0000
Real-space data points n_real_points67
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.769; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.986; Smooth: 0.974

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (4)

7. Fold Classification (SCOP + CATH) 5 domains

SCOP 2.08 (2 domains)

Domain ID domain_idd3i29a_
Class classb — All beta proteins
Fold Fold foldb.47 — Trypsin-like serine proteases
Superfamily Superfamily superfamilyb.47.1 — Trypsin-like serine proteases
Family Family familyb.47.1.2 — Eukaryotic proteases
Domain ID domain_idd3i29b_
Class classb — All beta proteins
Fold Fold foldb.42 — beta-Trefoil
Superfamily Superfamily superfamilyb.42.4 — STI-like
Family Family familyb.42.4.1 — Kunitz (STI) inhibitors

CATH v4.4 (3 domains)

Domain ID domain_id3i29A01
Class class2 — Mainly Beta
Architecture architecture40 — Beta Barrel
Topology topology10 — Thrombin, subunit H
Homologous superfamily homologous superfamily10 — Trypsin-like serine proteases
Domain ID domain_id3i29A02
Class class2 — Mainly Beta
Architecture architecture40 — Beta Barrel
Topology topology10 — Thrombin, subunit H
Homologous superfamily homologous superfamily10 — Trypsin-like serine proteases
Domain ID domain_id3i29B00
Class class2 — Mainly Beta
Architecture architecture80 — Trefoil
Topology topology10 — Trefoil (Acidic Fibroblast Growth Factor, subunit A)
Homologous superfamily homologous superfamily50

8. Citations (1)

9. Files and Curves (10)