SAXSdb — 1xta

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

Natrin 1

OrganismNot specified

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

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	CRVP1_NAJAT
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–221； UniProt 19–239 Author chain B； PDBConstruct 1–221； UniProt 19–239

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	1xta
Deposition date deposition_date	2004-10-21
Structure title title	Crystal Structure of Natrin, a snake venom CRISP from Taiwan cobra (Naja atra)
Keywords keywords	natrin, CRISP, serine protease, ion channel blocking, naja atra, cobra, TOXIN; TOXIN
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.

1xta__assembly_1__model_1

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

Download this curve (.dat)

1xta__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1xta__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	24.93 Å
Rg (electron density)	24.22 Å
Total Rg	24.92 Å
Atom count	3465
Residues	439
Excluded volume	60768 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1xta__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 (2)

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6. Fold Classification (SCOP + CATH) 8 domains

SCOP 2.08 (4 domains)

Domain ID domain_id	d1xtaa1
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.111 — PR-1-like
Superfamily Superfamily superfamily	d.111.1 — PR-1-like
Family Family family	d.111.1.1 — PR-1-like

Domain ID domain_id	d1xtaa2
Class class	g — Small proteins
Fold Fold fold	g.19 — Crisp domain-like
Superfamily Superfamily superfamily	g.19.1 — Crisp domain-like
Family Family family	g.19.1.0 — automated matches

Domain ID domain_id	d1xtab1
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.111 — PR-1-like
Superfamily Superfamily superfamily	d.111.1 — PR-1-like
Family Family family	d.111.1.1 — PR-1-like

Domain ID domain_id	d1xtab2
Class class	g — Small proteins
Fold Fold fold	g.19 — Crisp domain-like
Superfamily Superfamily superfamily	g.19.1 — Crisp domain-like
Family Family family	g.19.1.0 — automated matches

CATH v4.4 (4 domains)

Domain ID domain_id	1xtaA01
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	33 — Pathogenesis-related Protein p14a
Homologous superfamily homologous superfamily	10 — CAP

Domain ID domain_id	1xtaA02
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	10 — Arc Repressor Mutant, subunit A
Homologous superfamily homologous superfamily	740 — Crisp domain

Domain ID domain_id	1xtaB01
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	33 — Pathogenesis-related Protein p14a
Homologous superfamily homologous superfamily	10 — CAP

Domain ID domain_id	1xtaB02
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	10 — Arc Repressor Mutant, subunit A
Homologous superfamily homologous superfamily	740 — Crisp domain

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Unit-cell length a length_a	59.127 Å
Unit-cell length b length_b	64.985 Å
Unit-cell length c length_c	242.919 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	C 2 2 21
Space-group number int_tables_number	20
Crystal system crystal_system	—

Resolution resolution	1.580 Å
Low-resolution limit resolution_low	20.000 Å
R factor r_factor	0.2280
R_work r_work	0.2230
R_free r_free	0.2510

Description description	Natrin 1
Molecular weight formula_weight	24954.1 kDa
Source method src_method	nat
Copy count entity_count	2

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B
Atom count atom_count	3732

Crystal Structure of Natrin, a snake venom CRISP from Taiwan cobra (Naja atra)

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

Natrin 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

1xta__assembly_1__model_1

1xta__assembly_1__model_1 | I(q)

1xta__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

Entity 2 Entity 2 water

6. Fold Classification (SCOP + CATH) 8 domains

SCOP 2.08 (4 domains)

CATH v4.4 (4 domains)

7. Citations (2)

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	267

Crystal Structure of Natrin, a snake venom CRISP from Taiwan cobra (Naja atra)

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

Natrin 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

1xta__assembly_1__model_1

1xta__assembly_1__model_1 | I(q)

1xta__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

Entity 2 Entity 2 water

6. Fold Classification (SCOP + CATH) 8 domains

SCOP 2.08 (4 domains)

CATH v4.4 (4 domains)

7. Citations (2)