SAXSdb — 1qdq

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

CATHEPSIN B

OrganismNot specified

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein monomer	Monomer	Protein 1	[PROPYLAMINO-3-HYDROXY-BUTAN-1,4-DIONYL]-ISOLEUCYL-PROLINE × 1 water × 1	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	CATB_BOVIN
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–253； UniProt 80–332

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	1qdq
Deposition date deposition_date	1999-07-10
Structure title title	X-RAY CRYSTAL STRUCTURE OF BOVINE CATHEPSIN B-CA074 COMPLEX
Keywords keywords	CATHEPSIN B, PAPAIN, CATHEPSIN B-SPECIFIC INHIBITOR COMPLEX, HYDROLASE; HYDROLASE
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.

1qdq__assembly_1__model_1

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

Download this curve (.dat)

1qdq__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1qdq__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	18.05 Å
Rg (electron density)	17.07 Å
Total Rg	18.09 Å
Atom count	1935
Residues	251
Excluded volume	33610 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1qdq__assembly_1__model_1`	monomeric （1）	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 (3)

Entity 1 Entity 1 polymer

Description description	CATHEPSIN B
Molecular weight formula_weight	27485.6 kDa
EC 编号 ec_number	3.4.22.1
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A
Atom count atom_count	2091

LPESFDAREQWPNCPTIKEIRDQGSCGSCWAFGAVEAISDRICIHSNGRVNVEVSAEDMLTCCGGECGDGCNGGEPSGAWNFWTKKGLVSGGLYNSHVGCRPYSIPPCEHHVNGSRPPCTGEGDTPKCSKTCEPGYSPSYKEDKHFGCSSYSVANNEKEIMAEIYKNGPVEGAFSVYSDFLLYKSGVYQHVSGEIMGGHAIRILGWGVENGTPYWLVANSWNTDWGDNGFFKILRGQDHCGIESEIVAGMPCT

Entity 2 Entity 2 non-polymer

Description description	[PROPYLAMINO-3-HYDROXY-BUTAN-1,4-DIONYL]-ISOLEUCYL-PROLINE
Molecular weight formula_weight	385.5 kDa
Source method src_method	syn
Copy count entity_count	1

Entity 3 Entity 3 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	156

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6. Fold Classification (SCOP + CATH) 2 domains

SCOP 2.08 (1 domains)

Domain ID domain_id	d1qdqa_
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.3 — Cysteine proteinases
Superfamily Superfamily superfamily	d.3.1 — Cysteine proteinases
Family Family family	d.3.1.1 — Papain-like

CATH v4.4 (1 domains)

Domain ID domain_id	1qdqA00
Class class	3 — Alpha Beta
Architecture architecture	90 — Alpha-Beta Complex
Topology topology	70 — Cathepsin B; Chain A
Homologous superfamily homologous superfamily	10 — Cysteine proteinases

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Unit-cell length a length_a	73.060 Å
Unit-cell length b length_b	73.060 Å
Unit-cell length c length_c	141.790 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	90.00 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	8

Space group space_group	P 43 21 2
Space-group number int_tables_number	96
Crystal system crystal_system	—

Resolution resolution	2.180 Å
Low-resolution limit resolution_low	7.000 Å
R factor r_factor	—
R_work r_work	0.1520
R_free r_free	0.1830

X-RAY CRYSTAL STRUCTURE OF BOVINE CATHEPSIN B-CA074 COMPLEX

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

CATHEPSIN B

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

1qdq__assembly_1__model_1

1qdq__assembly_1__model_1 | I(q)

1qdq__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 (3)

Entity 1 Entity 1 polymer

Polymer Polymer

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 water

6. Fold Classification (SCOP + CATH) 2 domains

SCOP 2.08 (1 domains)

CATH v4.4 (1 domains)

7. Citations (1)

X-RAY CRYSTAL STRUCTURE OF BOVINE CATHEPSIN B-CA074 COMPLEX

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

CATHEPSIN B

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

1qdq__assembly_1__model_1

1qdq__assembly_1__model_1 | I(q)

1qdq__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 (3)

Entity 1 Entity 1 polymer

Polymer Polymer

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 water

6. Fold Classification (SCOP + CATH) 2 domains

SCOP 2.08 (1 domains)

CATH v4.4 (1 domains)

7. Citations (1)