SAXSdb — 1b0c

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

PROTEIN (PANCREATIC TRYPSIN INHIBITOR)

Bos taurus

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 10	water × 10	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	BPT1_BOVIN
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–56； UniProt 1–58 Author chain B； PDBConstruct 1–56； UniProt 1–58 Author chain C； PDBConstruct 1–56； UniProt 1–58 Author chain D； PDBConstruct 1–56； UniProt 1–58 Author chain E； PDBConstruct 1–56； UniProt 1–58

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.

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2. Structure Basics 2. Structure Basics

Entry ID entry_id	1b0c
Deposition date deposition_date	1998-11-06
Structure title title	EVIDENCE OF A COMMON DECAMER IN THREE CRYSTAL STRUCTURES OF BPTI, CRYSTALLIZED FROM THIOCYANATE, CHLORIDE OR SULFATE
Keywords keywords	BOVINE PANCREATIC TRYPSIN INHIBITOR, PENTAMERIC MOLECULE, HYDROLASE INHIBITOR; HYDROLASE INHIBITOR
Experimental Method method	X-RAY DIFFRACTION

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3. Official assembly/model SAXS Official SAXS Profiles

This page reads only the latest assembly calculations. Every curve maps to an explicit PDB entry, official biological assembly and coordinate model.

1b0c__assembly_1__model_1

Assembly 1 · Model 1 · CRYSOL 4.1.3-1-20251215 (887e7ef)

Download this curve (.dat)

1b0c__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1b0c__assembly_1__model_1 | P(r) · Pending

P(r) will be calculated and displayed separately for the same assembly/model.

Rg（Guinier）	27.89 Å
Rg (electron density)	26.76 Å
Total Rg	27.61 Å
Atom count	4256
Residues	560
Excluded volume	75194 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1b0c__assembly_1__model_1`	decameric （10）	Success	4.1.3-1-20251215 (887e7ef)	View Download

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4. Crystallography and Experiment 4. Crystallography & Experiment

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5. Entities and Polymers Entities & Polymers (2)

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6. Fold Classification (SCOP + CATH) 10 domains

SCOP 2.08 (5 domains)

Domain ID domain_id	d1b0ca_
Class class	g — Small proteins
Fold Fold fold	g.8 — BPTI-like
Superfamily Superfamily superfamily	g.8.1 — BPTI-like
Family Family family	g.8.1.1 — Small Kunitz-type inhibitors & BPTI-like toxins

Domain ID domain_id	d1b0cb_
Class class	g — Small proteins
Fold Fold fold	g.8 — BPTI-like
Superfamily Superfamily superfamily	g.8.1 — BPTI-like
Family Family family	g.8.1.1 — Small Kunitz-type inhibitors & BPTI-like toxins

Domain ID domain_id	d1b0cc_
Class class	g — Small proteins
Fold Fold fold	g.8 — BPTI-like
Superfamily Superfamily superfamily	g.8.1 — BPTI-like
Family Family family	g.8.1.1 — Small Kunitz-type inhibitors & BPTI-like toxins

Domain ID domain_id	d1b0cd_
Class class	g — Small proteins
Fold Fold fold	g.8 — BPTI-like
Superfamily Superfamily superfamily	g.8.1 — BPTI-like
Family Family family	g.8.1.1 — Small Kunitz-type inhibitors & BPTI-like toxins

Domain ID domain_id	d1b0ce_
Class class	g — Small proteins
Fold Fold fold	g.8 — BPTI-like
Superfamily Superfamily superfamily	g.8.1 — BPTI-like
Family Family family	g.8.1.1 — Small Kunitz-type inhibitors & BPTI-like toxins

CATH v4.4 (5 domains)

Domain ID domain_id	1b0cA00
Class class	4 — Few Secondary Structures
Architecture architecture	10 — Irregular
Topology topology	410 — Factor Xa Inhibitor
Homologous superfamily homologous superfamily	10 — Pancreatic trypsin inhibitor Kunitz domain

Domain ID domain_id	1b0cB00
Class class	4 — Few Secondary Structures
Architecture architecture	10 — Irregular
Topology topology	410 — Factor Xa Inhibitor
Homologous superfamily homologous superfamily	10 — Pancreatic trypsin inhibitor Kunitz domain

Domain ID domain_id	1b0cC00
Class class	4 — Few Secondary Structures
Architecture architecture	10 — Irregular
Topology topology	410 — Factor Xa Inhibitor
Homologous superfamily homologous superfamily	10 — Pancreatic trypsin inhibitor Kunitz domain

Domain ID domain_id	1b0cD00
Class class	4 — Few Secondary Structures
Architecture architecture	10 — Irregular
Topology topology	410 — Factor Xa Inhibitor
Homologous superfamily homologous superfamily	10 — Pancreatic trypsin inhibitor Kunitz domain

Domain ID domain_id	1b0cE00
Class class	4 — Few Secondary Structures
Architecture architecture	10 — Irregular
Topology topology	410 — Factor Xa Inhibitor
Homologous superfamily homologous superfamily	10 — Pancreatic trypsin inhibitor Kunitz domain

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Unit-cell length a length_a	95.470 Å
Unit-cell length b length_b	95.470 Å
Unit-cell length c length_c	159.690 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	90.00 °
Unit-cell angle γ angle_gamma	120.00 °
Molecules per unit cell Z z_pdb	60

Space group space_group	P 64 2 2
Space-group number int_tables_number	181
Crystal system crystal_system	—

Resolution resolution	2.800 Å
Low-resolution limit resolution_low	18.000 Å
R factor r_factor	0.1980
R_work r_work	0.1980
R_free r_free	0.2230

Description description	PROTEIN (PANCREATIC TRYPSIN INHIBITOR)
Molecular weight formula_weight	6527.6 kDa
Source method src_method	man
Copy count entity_count	5

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B,C,D,E
Atom count atom_count	2186

EVIDENCE OF A COMMON DECAMER IN THREE CRYSTAL STRUCTURES OF BPTI, CRYSTALLIZED FROM THIOCYANATE, CHLORIDE OR SULFATE

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

PROTEIN (PANCREATIC TRYPSIN INHIBITOR)

State in the Current Structure

Other States of the Same Protein in the Database

2. Structure Basics 2. Structure Basics

3. Official assembly/model SAXS Official SAXS Profiles

1b0c__assembly_1__model_1

1b0c__assembly_1__model_1 | I(q)

1b0c__assembly_1__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

Refinement Refinement

Diffraction experiment Diffraction

5. Entities and Polymers Entities & Polymers (2)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 water

6. Fold Classification (SCOP + CATH) 10 domains

SCOP 2.08 (5 domains)

CATH v4.4 (5 domains)

7. Citations (3)

Source organism organism	Bos taurus
Common name common_name	cattle
NCBI taxonomy ID ncbi_taxonomy_id	9913

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	58

EVIDENCE OF A COMMON DECAMER IN THREE CRYSTAL STRUCTURES OF BPTI, CRYSTALLIZED FROM THIOCYANATE, CHLORIDE OR SULFATE

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

PROTEIN (PANCREATIC TRYPSIN INHIBITOR)

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

2. Structure Basics 2. Structure Basics

3. Official assembly/model SAXS Official SAXS Profiles

1b0c__assembly_1__model_1

1b0c__assembly_1__model_1 | I(q)

1b0c__assembly_1__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

Refinement Refinement

Diffraction experiment Diffraction

5. Entities and Polymers Entities & Polymers (2)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 water

6. Fold Classification (SCOP + CATH) 10 domains

SCOP 2.08 (5 domains)

CATH v4.4 (5 domains)

7. Citations (3)