SAXSdb — 2plh

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

ALPHA-1-PUROTHIONIN

OrganismNot specified

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 4	ACETATE ION × 12 PHOSPHATE ION × 4 2-BUTANOL × 8 GLYCEROL × 8 water × 4	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	THN1_WHEAT
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–45； UniProt 17–61

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	2plh
Deposition date deposition_date	1993-07-09
Structure title title	STRUCTURE OF ALPHA-1-PUROTHIONIN AT ROOM TEMPERATURE AND 2.8 ANGSTROMS RESOLUTION
Keywords keywords	MEMBRANE ACTIVE, DISULFIDE RICH, 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.

2plh__assembly_1__model_1

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

Download this curve (.dat)

2plh__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

2plh__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	22.34 Å
Rg (electron density)	22.10 Å
Total Rg	22.92 Å
Atom count	1476
Residues	180
Excluded volume	26492 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`2plh__assembly_1__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 (6)

Entity 1 Entity 1 polymer

Description description	ALPHA-1-PUROTHIONIN
Molecular weight formula_weight	4835.8 kDa
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	477

KSCCRSTLGRNCYNLCRARGAQKLCAGVCRCKISSGLSCPKGFPK

Entity 2 Entity 2 non-polymer

Description description	ACETATE ION
Molecular weight formula_weight	59.0 kDa
Source method src_method	syn
Copy count entity_count	3

Entity 3 Entity 3 non-polymer

Description description	PHOSPHATE ION
Molecular weight formula_weight	95.0 kDa
Source method src_method	syn
Copy count entity_count	1

Entity 4 Entity 4 non-polymer

Description description	2-BUTANOL
Molecular weight formula_weight	74.1 kDa
Source method src_method	syn
Copy count entity_count	2

Entity 5 Entity 5 non-polymer

Description description	GLYCEROL
Molecular weight formula_weight	92.1 kDa
Source method src_method	syn
Copy count entity_count	2

Entity 6 Entity 6 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	108

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6. Fold Classification (SCOP + CATH) 2 domains

SCOP 2.08 (1 domains)

Domain ID domain_id	d2plha_
Class class	g — Small proteins
Fold Fold fold	g.13 — Crambin-like
Superfamily Superfamily superfamily	g.13.1 — Crambin-like
Family Family family	g.13.1.1 — Crambin-like

CATH v4.4 (1 domains)

Domain ID domain_id	2plhA00
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	1350 — Crambin
Homologous superfamily homologous superfamily	10 — Thionin-like

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Unit-cell length a length_a	53.590 Å
Unit-cell length b length_b	53.590 Å
Unit-cell length c length_c	69.790 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	10.000 Å
R factor r_factor	0.1550
R_work r_work	—
R_free r_free	—

STRUCTURE OF ALPHA-1-PUROTHIONIN AT ROOM TEMPERATURE AND 2.8 ANGSTROMS RESOLUTION

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

ALPHA-1-PUROTHIONIN

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

2plh__assembly_1__model_1

2plh__assembly_1__model_1 | I(q)

2plh__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 (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) 2 domains

SCOP 2.08 (1 domains)

CATH v4.4 (1 domains)

7. Citations (2)

STRUCTURE OF ALPHA-1-PUROTHIONIN AT ROOM TEMPERATURE AND 2.8 ANGSTROMS RESOLUTION

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

ALPHA-1-PUROTHIONIN

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

2plh__assembly_1__model_1

2plh__assembly_1__model_1 | I(q)

2plh__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 (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) 2 domains

SCOP 2.08 (1 domains)

CATH v4.4 (1 domains)

7. Citations (2)