1f2s

CRYSTAL STRUCTURE OF THE COMPLEX FORMED BETWEEN BOVINE BETA-TRYPSIN AND MCTI-A, A TRYPSIN INHIBITOR OF SQUASH FAMILY AT 1.8 A RESOLUTION

Method: X-RAY DIFFRACTION Dmax: 52.2 Å Quality: GOOD

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

TRYPSIN

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 E; UniProt 21–243 Not recorded TRYPSIN INHIBITOR A × 1 (P10295) CA CALCIUM ION × 1 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, HANGING DROP;pH 5.1;295 K;PEG6000, soduim phosphate buffer, pH 5.10, VAPOR DIFFUSION, HANGING DROP, temperature 295K Resolution 1.79 Å R-free 0.226

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 E; PDBConstruct 1–223; UniProt 21–243

TRYPSIN INHIBITOR A

OrganismNot specified

UniProt P10295

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 1–28 Not recorded TRYPSIN × 1 (P00760) CA CALCIUM ION × 1 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, HANGING DROP;pH 5.1;295 K;PEG6000, soduim phosphate buffer, pH 5.10, VAPOR DIFFUSION, HANGING DROP, temperature 295K Resolution 1.79 Å R-free 0.226

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.

No other PDB entry for the same UniProt protein was found.

View Construct and Data Evidence
UniProt name ITR2_MOMCH
Isoform
PDB entities 2
Chains and sequence ranges Author chain I; PDBConstruct 1–28; UniProt 1–28

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 1f2s

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 1f2s
Download Download

2. Structure Basics 2. Structure Basics

Entry ID entry_id1f2s
Deposition date deposition_date2000-05-29
Structure title titleCRYSTAL STRUCTURE OF THE COMPLEX FORMED BETWEEN BOVINE BETA-TRYPSIN AND MCTI-A, A TRYPSIN INHIBITOR OF SQUASH FAMILY AT 1.8 A RESOLUTION
Keywords keywordsPROTEINASE-INHIBITOR COMPLEX, TRYPSIN, 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_guinier17.71
Radius of gyration Rg (electron density) rg_electron16.58
Forward intensity I(0) i013788800.00
Molecular weight molecular_weight26598.0 kDa
Excluded volume excluded_volume32753 ų
Envelope volume envelope_volume36508 ų
Hydration-shell volume shell_volume17976 ų
Envelope diameter envelope_diameter53.1
Shell Rg shell_rg23.22
Envelope Rg envelope_rg16.85
Shape Rg shape_rg16.56
Total Rg total_rg17.62
Total atoms total_atoms1848
Residues n_residues251
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 dmax52.2
Rg (real space) rg_real17.56
Rg uncertainty (real space) rg_real_error0.23
I(0) (real space) i0_real1.3790e+07
I(0) uncertainty (real space) i0_real_error1.4820e+05
Rg (reciprocal space) rg_reciprocal17.58
I(0) (reciprocal space) i0_reciprocal13790000.0000
Solution quality estimate total_estimate0.8325
Solution quality rating solution_quality GOOD a GOOD solution
P(r) peaks n_peaks2
Primary peak position r_peak_primary23.0
Skewness Skewness skewness0.084
Kurtosis Kurtosis kurtosis-0.494
Angular range angular_range— – 0.4500 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha3544000.0000
Real-space data points n_real_points76
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.946; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.979; Smooth: 0.000

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (4)

7. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

Domain ID domain_idd1f2se_
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_idd1f2si_
Class classg — Small proteins
Fold Fold foldg.3 — Knottins (small inhibitors, toxins, lectins)
Superfamily Superfamily superfamilyg.3.2 — Plant inhibitors of proteinases and amylases
Family Family familyg.3.2.1 — Plant inhibitors of proteinases and amylases

CATH v4.4 (2 domains)

Domain ID domain_id1f2sE01
Class class2 — Mainly Beta
Architecture architecture40 — Beta Barrel
Topology topology10 — Thrombin, subunit H
Homologous superfamily homologous superfamily10 — Trypsin-like serine proteases
Domain ID domain_id1f2sE02
Class class2 — Mainly Beta
Architecture architecture40 — Beta Barrel
Topology topology10 — Thrombin, subunit H
Homologous superfamily homologous superfamily10 — Trypsin-like serine proteases

8. Citations (3)

9. Files and Curves (10)