SAXSdb — 1hss

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

0.19 ALPHA-AMYLASE INHIBITOR

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
2	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	IAA1_WHEAT
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–124； UniProt 1–124 Author chain B； PDBConstruct 1–124； UniProt 1–124 Author chain C； PDBConstruct 1–124； UniProt 1–124 Author chain D； PDBConstruct 1–124； UniProt 1–124

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	1hss
Deposition date deposition_date	1997-07-01
Structure title title	0.19 ALPHA-AMYLASE INHIBITOR FROM WHEAT
Keywords keywords	CEREAL INHIBITOR, ANIMAL AMYLASE; CEREAL INHIBITOR
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.

1hss__assembly_1__model_1

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

Download this curve (.dat)

1hss__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1hss__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	17.94 Å
Rg (electron density)	16.77 Å
Total Rg	17.57 Å
Atom count	1680
Residues	222
Excluded volume	29946 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1hss__assembly_1__model_1`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`1hss__assembly_2__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	d1hssa_
Class class	a — All alpha proteins
Fold Fold fold	a.52 — Bifunctional inhibitor/lipid-transfer protein/seed storage 2S albumin
Superfamily Superfamily superfamily	a.52.1 — Bifunctional inhibitor/lipid-transfer protein/seed storage 2S albumin
Family Family family	a.52.1.2 — Proteinase/alpha-amylase inhibitors

Domain ID domain_id	d1hssb_
Class class	a — All alpha proteins
Fold Fold fold	a.52 — Bifunctional inhibitor/lipid-transfer protein/seed storage 2S albumin
Superfamily Superfamily superfamily	a.52.1 — Bifunctional inhibitor/lipid-transfer protein/seed storage 2S albumin
Family Family family	a.52.1.2 — Proteinase/alpha-amylase inhibitors

Domain ID domain_id	d1hssc_
Class class	a — All alpha proteins
Fold Fold fold	a.52 — Bifunctional inhibitor/lipid-transfer protein/seed storage 2S albumin
Superfamily Superfamily superfamily	a.52.1 — Bifunctional inhibitor/lipid-transfer protein/seed storage 2S albumin
Family Family family	a.52.1.2 — Proteinase/alpha-amylase inhibitors

Domain ID domain_id	d1hssd_
Class class	a — All alpha proteins
Fold Fold fold	a.52 — Bifunctional inhibitor/lipid-transfer protein/seed storage 2S albumin
Superfamily Superfamily superfamily	a.52.1 — Bifunctional inhibitor/lipid-transfer protein/seed storage 2S albumin
Family Family family	a.52.1.2 — Proteinase/alpha-amylase inhibitors

CATH v4.4 (4 domains)

Domain ID domain_id	1hssA00
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	110 — Hydrophobic Seed Protein
Homologous superfamily homologous superfamily	10 — Plant lipid-transfer and hydrophobic proteins

Domain ID domain_id	1hssB00
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	110 — Hydrophobic Seed Protein
Homologous superfamily homologous superfamily	10 — Plant lipid-transfer and hydrophobic proteins

Domain ID domain_id	1hssC00
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	110 — Hydrophobic Seed Protein
Homologous superfamily homologous superfamily	10 — Plant lipid-transfer and hydrophobic proteins

Domain ID domain_id	1hssD00
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	110 — Hydrophobic Seed Protein
Homologous superfamily homologous superfamily	10 — Plant lipid-transfer and hydrophobic proteins

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Unit-cell length a length_a	79.300 Å
Unit-cell length b length_b	79.300 Å
Unit-cell length c length_c	60.800 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 31
Space-group number int_tables_number	144
Crystal system crystal_system	—

Resolution resolution	2.060 Å
Low-resolution limit resolution_low	10.000 Å
R factor r_factor	0.1870
R_work r_work	0.1870
R_free r_free	0.2230

Description description	0.19 ALPHA-AMYLASE INHIBITOR
Molecular weight formula_weight	13350.4 kDa
Source method src_method	nat
Copy count entity_count	4

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B,C,D
Atom count atom_count	3624

0.19 ALPHA-AMYLASE INHIBITOR FROM WHEAT

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

0.19 ALPHA-AMYLASE INHIBITOR

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

1hss__assembly_1__model_1

1hss__assembly_1__model_1 | I(q)

1hss__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 (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	264

0.19 ALPHA-AMYLASE INHIBITOR FROM WHEAT

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

0.19 ALPHA-AMYLASE INHIBITOR

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

1hss__assembly_1__model_1

1hss__assembly_1__model_1 | I(q)

1hss__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 (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)