SAXSdb — 1ezg

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

THERMAL HYSTERESIS PROTEIN ISOFORM YL-1

Tenebrio molitor

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 2	No other associated polymer	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	O16119_TENMO
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–84； UniProt 29–112 Author chain B； PDBConstruct 1–84； UniProt 29–112

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	1ezg
Deposition date deposition_date	2000-05-10
Structure title title	CRYSTAL STRUCTURE OF ANTIFREEZE PROTEIN FROM THE BEETLE, TENEBRIO MOLITOR
Keywords keywords	insect antifreeze protein, thermal hysteresis, Tenebrio molitor, iodination, right-handed beta-helix, TmAFP, ANTIFREEZE PROTEIN; ANTIFREEZE PROTEIN
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.

1ezg__assembly_1__model_1

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

Download this curve (.dat)

1ezg__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1ezg__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	15.27 Å
Rg (electron density)	14.71 Å
Total Rg	15.41 Å
Atom count	1106
Residues	164
Excluded volume	18721 Å³
Maximum q	0.500 Å⁻¹

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

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6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

Domain ID domain_id	d1ezga_
Class class	b — All beta proteins
Fold Fold fold	b.80 — Single-stranded right-handed beta-helix
Superfamily Superfamily superfamily	b.80.2 — Insect cysteine-rich antifreeze protein
Family Family family	b.80.2.1 — Insect cysteine-rich antifreeze protein

Domain ID domain_id	d1ezgb_
Class class	b — All beta proteins
Fold Fold fold	b.80 — Single-stranded right-handed beta-helix
Superfamily Superfamily superfamily	b.80.2 — Insect cysteine-rich antifreeze protein
Family Family family	b.80.2.1 — Insect cysteine-rich antifreeze protein

CATH v4.4 (2 domains)

Domain ID domain_id	1ezgA00
Class class	2 — Mainly Beta
Architecture architecture	160 — 3 Solenoid
Topology topology	20 — Pectate Lyase C-like
Homologous superfamily homologous superfamily	50 — Insect antifreeze protein

Domain ID domain_id	1ezgB00
Class class	2 — Mainly Beta
Architecture architecture	160 — 3 Solenoid
Topology topology	20 — Pectate Lyase C-like
Homologous superfamily homologous superfamily	50 — Insect antifreeze protein

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Unit-cell length a length_a	73.832 Å
Unit-cell length b length_b	73.832 Å
Unit-cell length c length_c	53.130 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 65
Space-group number int_tables_number	170
Crystal system crystal_system	—

Resolution resolution	1.400 Å
Low-resolution limit resolution_low	5.000 Å
R factor r_factor	0.1600
R_work r_work	0.1605
R_free r_free	0.1996

Description description	THERMAL HYSTERESIS PROTEIN ISOFORM YL-1
Molecular weight formula_weight	8389.1 kDa
Source method src_method	man
Copy count entity_count	2

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B
Atom count atom_count	1106

CRYSTAL STRUCTURE OF ANTIFREEZE PROTEIN FROM THE BEETLE, TENEBRIO MOLITOR

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

THERMAL HYSTERESIS PROTEIN ISOFORM YL-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

1ezg__assembly_1__model_1

1ezg__assembly_1__model_1 | I(q)

1ezg__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 (1)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

CATH v4.4 (2 domains)

7. Citations (1)

Source organism organism	Tenebrio molitor
Common name common_name	yellow mealworm
NCBI taxonomy ID ncbi_taxonomy_id	7067
Host organism host_organism	Escherichia coli BL21(DE3)

CRYSTAL STRUCTURE OF ANTIFREEZE PROTEIN FROM THE BEETLE, TENEBRIO MOLITOR

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

THERMAL HYSTERESIS PROTEIN ISOFORM YL-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

1ezg__assembly_1__model_1

1ezg__assembly_1__model_1 | I(q)

1ezg__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 (1)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

CATH v4.4 (2 domains)

7. Citations (1)