3tpi

THE GEOMETRY OF THE REACTIVE SITE AND OF THE PEPTIDE GROUPS IN TRYPSIN, TRYPSINOGEN AND ITS COMPLEXES WITH INHIBITORS

Method: X-RAY DIFFRACTION Dmax: 63.4 Å Quality: GOOD

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

TRYPSINOGEN

OrganismNot specified

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 Z; UniProt 15–243 Not recorded BOVINE PANCREATIC TRYPSIN INHIBITOR × 1 (P00974) ILE ISOLEUCINE × 1 VAL VALINE × 1 CA CALCIUM ION × 1 SO4 SULFATE ION × 2 X-RAY DIFFRACTION mmCIF provides none of the parsed experimental conditions Resolution 1.90 Å
2 Protein heterocomplex Heteromer Protein × 8 PDB declaration: octameric(8) Consistent with protein copy count Chain Z; UniProt 15–243 Not recorded BOVINE PANCREATIC TRYPSIN INHIBITOR × 4 (P00974) ILE ISOLEUCINE × 4 VAL VALINE × 4 CA CALCIUM ION × 4 SO4 SULFATE ION × 8 X-RAY DIFFRACTION mmCIF provides none of the parsed experimental conditions Resolution 1.90 Å
3 Protein heterocomplex Heteromer Protein × 4 PDB declaration: tetrameric(4) Consistent with protein copy count Chain Z; UniProt 15–243 Not recorded BOVINE PANCREATIC TRYPSIN INHIBITOR × 2 (P00974) ILE ISOLEUCINE × 2 VAL VALINE × 2 CA CALCIUM ION × 2 SO4 SULFATE ION × 4 X-RAY DIFFRACTION mmCIF provides none of the parsed experimental conditions Resolution 1.90 Å
4 Protein heterocomplex Heteromer Protein × 2 PDB declaration: dimeric(2) Consistent with protein copy count Chain Z; UniProt 15–243 Not recorded BOVINE PANCREATIC TRYPSIN INHIBITOR × 1 (P00974) ILE ISOLEUCINE × 1 VAL VALINE × 1 CA CALCIUM ION × 1 SO4 SULFATE ION × 2 X-RAY DIFFRACTION mmCIF provides none of the parsed experimental conditions Resolution 1.90 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.

608 other PDB entries and 767 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 Z; PDBConstruct 1–229; UniProt 15–243

BOVINE PANCREATIC TRYPSIN INHIBITOR

OrganismNot specified

UniProt P00974

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 I; UniProt 36–93 Not recorded TRYPSINOGEN × 1 (P00760) ILE ISOLEUCINE × 1 VAL VALINE × 1 CA CALCIUM ION × 1 SO4 SULFATE ION × 2 X-RAY DIFFRACTION mmCIF provides none of the parsed experimental conditions Resolution 1.90 Å
2 Protein heterocomplex Heteromer Protein × 8 PDB declaration: octameric(8) Consistent with protein copy count Chain I; UniProt 36–93 Not recorded TRYPSINOGEN × 4 (P00760) ILE ISOLEUCINE × 4 VAL VALINE × 4 CA CALCIUM ION × 4 SO4 SULFATE ION × 8 X-RAY DIFFRACTION mmCIF provides none of the parsed experimental conditions Resolution 1.90 Å
3 Protein heterocomplex Heteromer Protein × 4 PDB declaration: tetrameric(4) Consistent with protein copy count Chain I; UniProt 36–93 Not recorded TRYPSINOGEN × 2 (P00760) ILE ISOLEUCINE × 2 VAL VALINE × 2 CA CALCIUM ION × 2 SO4 SULFATE ION × 4 X-RAY DIFFRACTION mmCIF provides none of the parsed experimental conditions Resolution 1.90 Å
4 Protein heterocomplex Heteromer Protein × 2 PDB declaration: dimeric(2) Consistent with protein copy count Chain I; UniProt 36–93 Not recorded TRYPSINOGEN × 1 (P00760) ILE ISOLEUCINE × 1 VAL VALINE × 1 CA CALCIUM ION × 1 SO4 SULFATE ION × 2 X-RAY DIFFRACTION mmCIF provides none of the parsed experimental conditions Resolution 1.90 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.

123 other PDB entries and 262 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name BPT1_BOVIN
Isoform
PDB entities 2
Chains and sequence ranges Author chain I; PDBConstruct 1–58; UniProt 36–93

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 3tpi

P(r) Distance Distribution P(r) Distribution

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

Entry ID entry_id3tpi
Deposition date deposition_date1982-09-27
Structure title titleTHE GEOMETRY OF THE REACTIVE SITE AND OF THE PEPTIDE GROUPS IN TRYPSIN, TRYPSINOGEN AND ITS COMPLEXES WITH INHIBITORS
Keywords keywordsCOMPLEX (PROTEINASE-INHIBITOR), HYDROLASE-HYDROLASE INHIBITOR COMPLEX; HYDROLASE/HYDROLASE INHIBITOR
Experimental Method methodX-RAY DIFFRACTION

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

Radius of gyration Rg (Guinier) rg_guinier19.55
Radius of gyration Rg (electron density) rg_electron18.54
Forward intensity I(0) i017454700.00
Molecular weight molecular_weight30299.0 kDa
Excluded volume excluded_volume37363 ų
Envelope volume envelope_volume42338 ų
Hydration-shell volume shell_volume19167 ų
Envelope diameter envelope_diameter65.5
Shell Rg shell_rg24.85
Envelope Rg envelope_rg18.94
Shape Rg shape_rg18.50
Total Rg total_rg19.51
Total atoms total_atoms2110
Residues n_residues278
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 dmax63.4
Rg (real space) rg_real19.47
Rg uncertainty (real space) rg_real_error0.43
I(0) (real space) i0_real1.7450e+07
I(0) uncertainty (real space) i0_real_error2.0880e+05
Rg (reciprocal space) rg_reciprocal19.48
I(0) (reciprocal space) i0_reciprocal17450000.0000
Solution quality estimate total_estimate0.8126
Solution quality rating solution_quality GOOD a GOOD solution
P(r) peaks n_peaks2
Primary peak position r_peak_primary56.2
Skewness Skewness skewness0.253
Kurtosis Kurtosis kurtosis-0.349
Angular range angular_range— – 0.4050 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha4627000.0000
Real-space data points n_real_points72
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.856; Stabil: 0.999; Sysdev: 1.000; Positv: 1.000; Valcen: 0.997; Smooth: 0.000

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (7)

7. Fold Classification (SCOP + CATH) 5 domains

SCOP 2.08 (2 domains)

Domain ID domain_idd3tpii_
Class classg — Small proteins
Fold Fold foldg.8 — BPTI-like
Superfamily Superfamily superfamilyg.8.1 — BPTI-like
Family Family familyg.8.1.1 — Small Kunitz-type inhibitors & BPTI-like toxins
Domain ID domain_idd3tpiz_
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

CATH v4.4 (3 domains)

Domain ID domain_id3tpiI00
Class class4 — Few Secondary Structures
Architecture architecture10 — Irregular
Topology topology410 — Factor Xa Inhibitor
Homologous superfamily homologous superfamily10 — Pancreatic trypsin inhibitor Kunitz domain
Domain ID domain_id3tpiZ01
Class class2 — Mainly Beta
Architecture architecture40 — Beta Barrel
Topology topology10 — Thrombin, subunit H
Homologous superfamily homologous superfamily10 — Trypsin-like serine proteases
Domain ID domain_id3tpiZ02
Class class2 — Mainly Beta
Architecture architecture40 — Beta Barrel
Topology topology10 — Thrombin, subunit H
Homologous superfamily homologous superfamily10 — Trypsin-like serine proteases

8. Citations (8)

9. Files and Curves (10)