4ovo

REFINED X-RAY CRYSTAL STRUCTURES OF THE REACTIVE SITE MODIFIED OVOMUCOID INHIBITOR THIRD DOMAINS FROM SILVER PHEASANT (OMSVP3(ASTERISK)) AND FROM JAPANESE QUAIL (OMJPQ3(ASTERISK))

Method: X-RAY DIFFRACTION

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

OVOMUCOID THIRD DOMAIN CLEAVED RDI

Lophura nycthemera

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 2	water × 2	Consistent with protein count
2	Protein homooligomer	Homooligomer	Protein 4	water × 4	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	IOVO_LOPNY
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–56； UniProt 1–56

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	4ovo
Deposition date deposition_date	1991-05-13
Structure title title	REFINED X-RAY CRYSTAL STRUCTURES OF THE REACTIVE SITE MODIFIED OVOMUCOID INHIBITOR THIRD DOMAINS FROM SILVER PHEASANT (OMSVP3(ASTERISK)) AND FROM JAPANESE QUAIL (OMJPQ3(ASTERISK))
Keywords keywords	PROTEINASE INHIBITOR (KAZAL); PROTEINASE INHIBITOR (KAZAL)
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.

4ovo__assembly_1__model_1

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

Download this curve (.dat)

4ovo__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

4ovo__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	15.31 Å
Rg (electron density)	14.40 Å
Total Rg	15.46 Å
Atom count	836
Residues	112
Excluded volume	14737 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`4ovo__assembly_1__model_1`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`4ovo__assembly_2__model_1`	tetrameric （4）	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) 2 domains

SCOP 2.08 (1 domains)

Domain ID domain_id	d4ovoa_
Class class	g — Small proteins
Fold Fold fold	g.68 — Kazal-type serine protease inhibitors
Superfamily Superfamily superfamily	g.68.1 — Kazal-type serine protease inhibitors
Family Family family	g.68.1.1 — Ovomucoid domain III-like

CATH v4.4 (1 domains)

Domain ID domain_id	4ovoA00
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	60 — Wheat Germ Agglutinin (Isolectin 2); domain 1
Homologous superfamily homologous superfamily	30 —

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Unit-cell length a length_a	56.600 Å
Unit-cell length b length_b	56.600 Å
Unit-cell length c length_c	76.200 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	16

Space group space_group	I 4 2 2
Space-group number int_tables_number	97
Crystal system crystal_system	—

Resolution resolution	2.500 Å
Low-resolution limit resolution_low	— Å
R factor r_factor	—
R_work r_work	0.1850
R_free r_free	—

Description description	OVOMUCOID THIRD DOMAIN CLEAVED RDI
Molecular weight formula_weight	6044.8 kDa
Source method src_method	man
Copy count entity_count	1

Polymer type type	polypeptide(L)
Chain IDs strand_id	A
Atom count atom_count	443

REFINED X-RAY CRYSTAL STRUCTURES OF THE REACTIVE SITE MODIFIED OVOMUCOID INHIBITOR THIRD DOMAINS FROM SILVER PHEASANT (OMSVP3(ASTERISK)) AND FROM JAPANESE QUAIL (OMJPQ3(ASTERISK))

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

OVOMUCOID THIRD DOMAIN CLEAVED RDI

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

4ovo__assembly_1__model_1

4ovo__assembly_1__model_1 | I(q)

4ovo__assembly_1__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

Refinement Refinement

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) 2 domains

SCOP 2.08 (1 domains)

CATH v4.4 (1 domains)

7. Citations (1)

Source organism organism	Lophura nycthemera
Common name common_name	silver pheasant
NCBI taxonomy ID ncbi_taxonomy_id	9046

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	25

REFINED X-RAY CRYSTAL STRUCTURES OF THE REACTIVE SITE MODIFIED OVOMUCOID INHIBITOR THIRD DOMAINS FROM SILVER PHEASANT (OMSVP3(ASTERISK)) AND FROM JAPANESE QUAIL (OMJPQ3(ASTERISK))

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

OVOMUCOID THIRD DOMAIN CLEAVED RDI

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

4ovo__assembly_1__model_1

4ovo__assembly_1__model_1 | I(q)

4ovo__assembly_1__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

Refinement Refinement

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) 2 domains

SCOP 2.08 (1 domains)

CATH v4.4 (1 domains)

7. Citations (1)