SAXSdb — 1nmq

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

Caspase-3

Homo sapiens

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 2	3-(3-{2-[(5-METHANESULFONYL-THIOPHENE-2-CARBONYL)-AMINO]-ETHYLDISULFANYLMETHYL}- BENZENESULFONYLAMINO)-4-OXO-PENTANOIC ACID × 2 water × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	CASP3_HUMAN
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–249； UniProt 29–277 Author chain B； PDBConstruct 1–249； UniProt 29–277

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	1nmq
Deposition date deposition_date	2003-01-10
Structure title title	Extendend Tethering: In Situ Assembly of Inhibitors
Keywords keywords	Caspase-3, Tethering, Small molecule complex, APOPTOSIS, HYDROLASE; APOPTOSIS, 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.

1nmq__assembly_1__model_1

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

Download this curve (.dat)

1nmq__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1nmq__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	23.49 Å
Rg (electron density)	22.12 Å
Total Rg	22.98 Å
Atom count	3924
Residues	476
Excluded volume	69642 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1nmq__assembly_1__model_1`	dimeric （2）	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	Caspase-3
Molecular weight formula_weight	28518.5 kDa
EC 编号 ec_number	3.4.22.-
Source method src_method	man
Copy count entity_count	2

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B
Atom count atom_count	4024

SGISLDNSYKMDYPEMGLCIIINNKNFHKSTGMTSRSGTDVDAANLRETFRNLKYEVRNKNDLTREEIVELMRDVSKEDHSKRSSFVCVLLSHGEEGIIFGTNGPVDLKKITNFFRGDRCRSLTGKPKLFIIQACRGTELDCGIETDSGVDDDMACHKIPVDADFLYAYSTAPGYYSWRNSKDGSWFIQSLCAMLKQYADKLEFMHILTRVNRKVATEFESFSFDATFHAKKQIPCIVSMLTKELYFYH

Source Source

Source organism organism	Homo sapiens
Common name common_name	human
NCBI taxonomy ID ncbi_taxonomy_id	9606
Host organism host_organism	Escherichia coli

Entity 2 Entity 2 non-polymer

Description description	3-(3-{2-[(5-METHANESULFONYL-THIOPHENE-2-CARBONYL)-AMINO]-ETHYLDISULFANYLMETHYL}- BENZENESULFONYLAMINO)-4-OXO-PENTANOIC ACID
Molecular weight formula_weight	580.7 kDa
Source method src_method	syn
Copy count entity_count	2

Entity 3 Entity 3 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	100

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6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

Domain ID domain_id	d1nmqa_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.17 — Caspase-like
Superfamily Superfamily superfamily	c.17.1 — Caspase-like
Family Family family	c.17.1.1 — Caspase catalytic domain

Domain ID domain_id	d1nmqb_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.17 — Caspase-like
Superfamily Superfamily superfamily	c.17.1 — Caspase-like
Family Family family	c.17.1.1 — Caspase catalytic domain

CATH v4.4 (2 domains)

Domain ID domain_id	1nmqA00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	1460 —

Domain ID domain_id	1nmqB00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	1460 —

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Unit-cell length a length_a	68.858 Å
Unit-cell length b length_b	89.043 Å
Unit-cell length c length_c	96.531 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 21 21 21
Space-group number int_tables_number	19
Crystal system crystal_system	—

Resolution resolution	2.400 Å
Low-resolution limit resolution_low	20.000 Å
R factor r_factor	0.2470
R_work r_work	0.2411
R_free r_free	0.2995

Extendend Tethering: In Situ Assembly of Inhibitors

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

Caspase-3

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

1nmq__assembly_1__model_1

1nmq__assembly_1__model_1 | I(q)

1nmq__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

Source Source

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 water

6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

CATH v4.4 (2 domains)

7. Citations (2)

Extendend Tethering: In Situ Assembly of Inhibitors

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

Caspase-3

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

1nmq__assembly_1__model_1

1nmq__assembly_1__model_1 | I(q)

1nmq__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

Source Source

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 water

6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

CATH v4.4 (2 domains)

7. Citations (2)