SAXSdb — 1eai

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

PROTEIN (ELASTASE)

OrganismNot specified

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 4	PROTEIN (CHYMOTRYPSIN/ELASTASE ISOINHIBITOR 1) × 2 （P07851） water × 4	Consistent with protein count
2	Protein heterocomplex	Heteromer	Protein 2	PROTEIN (CHYMOTRYPSIN/ELASTASE ISOINHIBITOR 1) × 1 （P07851） water × 2	Consistent with protein count
3	Protein heterocomplex	Heteromer	Protein 2	PROTEIN (CHYMOTRYPSIN/ELASTASE ISOINHIBITOR 1) × 1 （P07851） water × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	ELA1_PIG
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–240； UniProt 27–266 Author chain B； PDBConstruct 1–240； UniProt 27–266

PROTEIN (CHYMOTRYPSIN/ELASTASE ISOINHIBITOR 1)

OrganismNot specified

UniProt P07851

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 4	PROTEIN (ELASTASE) × 2 （P00772） water × 4	Consistent with protein count
2	Protein heterocomplex	Heteromer	Protein 2	PROTEIN (ELASTASE) × 1 （P00772） water × 2	Consistent with protein count
3	Protein heterocomplex	Heteromer	Protein 2	PROTEIN (ELASTASE) × 1 （P00772） water × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	ICE1_ASCSU
Isoform	—
PDB entities	2
Chains and sequence ranges	Author chain C； PDBConstruct 1–61； UniProt 1–61 Author chain D； PDBConstruct 1–61； UniProt 1–61

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	1eai
Deposition date deposition_date	1999-03-25
Structure title title	COMPLEX OF ASCARIS CHYMOTRPSIN/ELASTASE INHIBITOR WITH PORCINE ELASTASE
Keywords keywords	SERINE PROTEINASE, ELASTASE, ASCARIS SUMM, PROTEIN INHIBITOR; SERINE PROTEINASE
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.

1eai__assembly_1__model_1

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

Download this curve (.dat)

1eai__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1eai__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	28.52 Å
Rg (electron density)	27.98 Å
Total Rg	28.59 Å
Atom count	4540
Residues	602
Excluded volume	79440 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1eai__assembly_1__model_1`	tetrameric （4）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`1eai__assembly_2__model_1`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
3	1	`1eai__assembly_3__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	PROTEIN (ELASTASE)
Molecular weight formula_weight	25929.0 kDa
EC 编号 ec_number	3.4.21.36
Source method src_method	nat
Copy count entity_count	2

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B
Atom count atom_count	4686

VVGGTEAQRNSWPSQISLQYRSGSSWAHTCGGTLIRQNWVMTAAHCVDRELTFRVVVGEHNLNQNDGTEQYVGVQKIVVHPYWNTDDVAAGYDIALLRLAQSVTLNSYVQLGVLPRAGTILANNSPCYITGWGLTRTNGQLAQTLQQAYLPTVDYAICSSSSYWGSTVKNSMVCAGGDGVRSGCQGDSGGPLHCLVNGQYAVHGVTSFVSRLGCNVTRKPTVFTRVSAYISWINNVIASN

Entity 2 Entity 2 polymer

Description description	PROTEIN (CHYMOTRYPSIN/ELASTASE ISOINHIBITOR 1)
Molecular weight formula_weight	6602.5 kDa
Source method src_method	nat
Copy count entity_count	2

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	C,D

GQESCGPNEVWTECTGCEMKCGPDENTPCPLMCRRPSCECSPGRGMRRTNDGKCIPASQCP

Entity 3 Entity 3 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	146

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6. Fold Classification (SCOP + CATH) 10 domains

SCOP 2.08 (4 domains)

Domain ID domain_id	d1eaia_
Class class	b — All beta proteins
Fold Fold fold	b.47 — Trypsin-like serine proteases
Superfamily Superfamily superfamily	b.47.1 — Trypsin-like serine proteases
Family Family family	b.47.1.2 — Eukaryotic proteases

Domain ID domain_id	d1eaib_
Class class	b — All beta proteins
Fold Fold fold	b.47 — Trypsin-like serine proteases
Superfamily Superfamily superfamily	b.47.1 — Trypsin-like serine proteases
Family Family family	b.47.1.2 — Eukaryotic proteases

Domain ID domain_id	d1eaic_
Class class	g — Small proteins
Fold Fold fold	g.22 — Serine protease inhibitors
Superfamily Superfamily superfamily	g.22.1 — Serine protease inhibitors
Family Family family	g.22.1.1 — ATI-like

Domain ID domain_id	d1eaid_
Class class	g — Small proteins
Fold Fold fold	g.22 — Serine protease inhibitors
Superfamily Superfamily superfamily	g.22.1 — Serine protease inhibitors
Family Family family	g.22.1.1 — ATI-like

CATH v4.4 (6 domains)

Domain ID domain_id	1eaiA01
Class class	2 — Mainly Beta
Architecture architecture	40 — Beta Barrel
Topology topology	10 — Thrombin, subunit H
Homologous superfamily homologous superfamily	10 — Trypsin-like serine proteases

Domain ID domain_id	1eaiA02
Class class	2 — Mainly Beta
Architecture architecture	40 — Beta Barrel
Topology topology	10 — Thrombin, subunit H
Homologous superfamily homologous superfamily	10 — Trypsin-like serine proteases

Domain ID domain_id	1eaiB01
Class class	2 — Mainly Beta
Architecture architecture	40 — Beta Barrel
Topology topology	10 — Thrombin, subunit H
Homologous superfamily homologous superfamily	10 — Trypsin-like serine proteases

Domain ID domain_id	1eaiB02
Class class	2 — Mainly Beta
Architecture architecture	40 — Beta Barrel
Topology topology	10 — Thrombin, subunit H
Homologous superfamily homologous superfamily	10 — Trypsin-like serine proteases

Domain ID domain_id	1eaiC00
Class class	2 — Mainly Beta
Architecture architecture	10 — Ribbon
Topology topology	25 — Laminin
Homologous superfamily homologous superfamily	10 — Laminin

Domain ID domain_id	1eaiD00
Class class	2 — Mainly Beta
Architecture architecture	10 — Ribbon
Topology topology	25 — Laminin
Homologous superfamily homologous superfamily	10 — Laminin

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Unit-cell length a length_a	84.020 Å
Unit-cell length b length_b	84.020 Å
Unit-cell length c length_c	190.930 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	12

Space group space_group	P 32 2 1
Space-group number int_tables_number	154
Crystal system crystal_system	—

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

COMPLEX OF ASCARIS CHYMOTRPSIN/ELASTASE INHIBITOR WITH PORCINE ELASTASE

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

PROTEIN (ELASTASE)

State in the Current Structure

Other States of the Same Protein in the Database

PROTEIN (CHYMOTRYPSIN/ELASTASE ISOINHIBITOR 1)

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

1eai__assembly_1__model_1

1eai__assembly_1__model_1 | I(q)

1eai__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 polymer

Polymer Polymer

Entity 3 Entity 3 water

6. Fold Classification (SCOP + CATH) 10 domains

SCOP 2.08 (4 domains)

CATH v4.4 (6 domains)

7. Citations (2)

COMPLEX OF ASCARIS CHYMOTRPSIN/ELASTASE INHIBITOR WITH PORCINE ELASTASE

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

PROTEIN (ELASTASE)

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

PROTEIN (CHYMOTRYPSIN/ELASTASE ISOINHIBITOR 1)

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

1eai__assembly_1__model_1

1eai__assembly_1__model_1 | I(q)

1eai__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 polymer

Polymer Polymer

Entity 3 Entity 3 water

6. Fold Classification (SCOP + CATH) 10 domains

SCOP 2.08 (4 domains)

CATH v4.4 (6 domains)

7. Citations (2)