SAXSdb — 4y4g

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

Endothiapepsin

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	GLYCEROL × 5 ACETATE ION × 2 DIMETHYL SULFOXIDE × 3 L-CANAVANINE × 1 water × 1	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	CARP_CRYPA
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–330； UniProt 90–419

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	4y4g
Deposition date deposition_date	2015-02-10
Structure title title	Endothiapepsin in complex with fragment B53
Keywords keywords	fragment screening, aspartic protease inhibition, 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.

4y4g__assembly_1__model_1

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

Download this curve (.dat)

4y4g__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

4y4g__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	20.52 Å
Rg (electron density)	19.47 Å
Total Rg	20.51 Å
Atom count	4667
Residues	330
Excluded volume	43144 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`4y4g__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 (6)

Entity 1 Entity 1 polymer

Description description	Endothiapepsin
Molecular weight formula_weight	33813.9 kDa
EC 编号 ec_number	3.4.23.22
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	5193

STGSATTTPIDSLDDAYITPVQIGTPAQTLNLDFDTGSSDLWVFSSETTASEVDGQTIYTPSKSTTAKLLSGATWSISYGDGSSSSGDVYTDTVSVGGLTVTGQAVESAKKVSSSFTEDSTIDGLLGLAFSTLNTVSPTQQKTFFDNAKASLDSPVFTADLGYHAPGTYNFGFIDTTAYTGSITYTAVSTKQGFWEWTSTGYAVGSGTFKSTSIDGIADTGTTLLYLPATVVSAYWAQVSGAKSSSSVGGYVFPCSATLPSFTFGVGSARIVIPGDYIDFGPISTGSSSCFGGIQSSAGIGINIFGDVALKAAFVVFNGATTPTLGFASK

Entity 2 Entity 2 non-polymer

Description description	GLYCEROL
Molecular weight formula_weight	92.1 kDa
Source method src_method	syn
Copy count entity_count	5

Entity 3 Entity 3 non-polymer

Description description	ACETATE ION
Molecular weight formula_weight	59.0 kDa
Source method src_method	syn
Copy count entity_count	2

Entity 4 Entity 4 non-polymer

Description description	DIMETHYL SULFOXIDE
Molecular weight formula_weight	78.1 kDa
Source method src_method	syn
Copy count entity_count	3

Entity 5 Entity 5 non-polymer

Description description	L-CANAVANINE
Molecular weight formula_weight	176.2 kDa
Source method src_method	syn
Copy count entity_count	1

Entity 6 Entity 6 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	312

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6. Fold Classification (SCOP + CATH) 3 domains

SCOP 2.08 (1 domains)

Domain ID domain_id	d4y4ga_
Class class	b — All beta proteins
Fold Fold fold	b.50 — Acid proteases
Superfamily Superfamily superfamily	b.50.1 — Acid proteases
Family Family family	b.50.1.2 — Pepsin-like

CATH v4.4 (2 domains)

Domain ID domain_id	4y4gA01
Class class	2 — Mainly Beta
Architecture architecture	40 — Beta Barrel
Topology topology	70 — Cathepsin D, subunit A; domain 1
Homologous superfamily homologous superfamily	10 — Acid Proteases

Domain ID domain_id	4y4gA02
Class class	2 — Mainly Beta
Architecture architecture	40 — Beta Barrel
Topology topology	70 — Cathepsin D, subunit A; domain 1
Homologous superfamily homologous superfamily	10 — Acid Proteases

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Unit-cell length a length_a	45.212 Å
Unit-cell length b length_b	73.111 Å
Unit-cell length c length_c	52.579 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	109.25 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	2

Space group space_group	P 1 21 1
Space-group number int_tables_number	4
Crystal system crystal_system	—

Resolution resolution	1.439 Å
Low-resolution limit resolution_low	42.685 Å
R factor r_factor	0.1220
R_work r_work	0.1201
R_free r_free	0.1591

Endothiapepsin in complex with fragment B53

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

Endothiapepsin

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

4y4g__assembly_1__model_1

4y4g__assembly_1__model_1 | I(q)

4y4g__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 (6)

Entity 1 Entity 1 polymer

Polymer Polymer

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 non-polymer

Entity 5 Entity 5 non-polymer

Entity 6 Entity 6 water

6. Fold Classification (SCOP + CATH) 3 domains

SCOP 2.08 (1 domains)

CATH v4.4 (2 domains)

7. Citations (1)

Endothiapepsin in complex with fragment B53

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

Endothiapepsin

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

4y4g__assembly_1__model_1

4y4g__assembly_1__model_1 | I(q)

4y4g__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 (6)

Entity 1 Entity 1 polymer

Polymer Polymer

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 non-polymer

Entity 5 Entity 5 non-polymer

Entity 6 Entity 6 water

6. Fold Classification (SCOP + CATH) 3 domains

SCOP 2.08 (1 domains)

CATH v4.4 (2 domains)

7. Citations (1)