SAXSdb — 1nna

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

NEURAMINIDASE

Influenza A virus

State in the Current Structure

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

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	NRAM_IATRA
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–387； UniProt 84–470

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	1nna
Deposition date deposition_date	1993-03-08
Structure title title	THREE-DIMENSIONAL STRUCTURE OF INFLUENZA A N9 NEURAMINIDASE AND ITS COMPLEX WITH THE INHIBITOR 2-DEOXY 2,3-DEHYDRO-N-ACETYL NEURAMINIC ACID
Keywords keywords	HYDROLASE(O-GLYCOSYL); HYDROLASE(O-GLYCOSYL)
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.

1nna__assembly_1__model_1

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

Download this curve (.dat)

1nna__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1nna__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	35.15 Å
Rg (electron density)	34.54 Å
Total Rg	35.13 Å
Atom count	15064
Residues	1548
Excluded volume	214360 Å³
Maximum q	0.500 Å⁻¹

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

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6. Fold Classification (SCOP + CATH) 2 domains

SCOP 2.08 (1 domains)

Domain ID domain_id	d1nnaa_
Class class	b — All beta proteins
Fold Fold fold	b.68 — 6-bladed beta-propeller
Superfamily Superfamily superfamily	b.68.1 — Sialidases
Family Family family	b.68.1.1 — Sialidases (neuraminidases)

CATH v4.4 (1 domains)

Domain ID domain_id	1nnaA00
Class class	2 — Mainly Beta
Architecture architecture	120 — 6 Propeller
Topology topology	10 — Neuraminidase
Homologous superfamily homologous superfamily	10 —

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7. Citations (8)

;Three-dimensional structure of influenza A N9 neuraminidase and its complex with the inhibitor 2-deoxy 2,3-dehydro-N-acetyl neuraminic acid. ;

J.Mol.Biol. (1993)

PMID: 8371267 · DOI: 10.1006/jmbi.1993.1461 PRIMARY

;Three-Dimensional Structure of Influenza A(Slash)Tern(Slash)Australia(Slash)G70C(Slash)75 N9 Neuraminidase and its Complex with the Inhibitor 2-Deoxy-2,3-Dehydro N-Acetyl Neuraminic Acid ;

Thesis (1992)

Transfer of the Hemagglutinin Activity of Influenza Virus Neuraminidase Subtype N9 Into an N2 Background

Virology (1991)

Refined Atomic Structures of N9 Subtype Influenza Virus Neuraminidase and Escape Mutants

J.Mol.Biol. (1991)

Three-Dimensional Structure of Neuraminidase of Subtype N9 from an Avian Influenza Virus

Proteins (1987)

Gene and Protein Sequence of an Influenza Neuraminidase with Hemagglutinin Activity

Virology (1985)

Influenza Virus Neuraminidase with Hemagglutinin Activity

Virology (1984)

Memorandum: A Revision of the System of Nomenclature for Influenza Viruses

Bull.Who. (1980)

Unit-cell length a length_a	183.780 Å
Unit-cell length b length_b	183.780 Å
Unit-cell length c length_c	183.780 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	48

Space group space_group	I 4 3 2
Space-group number int_tables_number	211
Crystal system crystal_system	—

Resolution resolution	2.500 Å
Low-resolution limit resolution_low	6.000 Å
R factor r_factor	0.1930
R_work r_work	0.1930
R_free r_free	—

Description description	NEURAMINIDASE
Molecular weight formula_weight	43566.6 kDa
EC 编号 ec_number	3.2.1.18
Source method src_method	man
Copy count entity_count	1

Polymer type type	polypeptide(L)
Chain IDs strand_id	A
Atom count atom_count	3766

THREE-DIMENSIONAL STRUCTURE OF INFLUENZA A N9 NEURAMINIDASE AND ITS COMPLEX WITH THE INHIBITOR 2-DEOXY 2,3-DEHYDRO-N-ACETYL NEURAMINIC ACID

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

NEURAMINIDASE

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

1nna__assembly_1__model_1

1nna__assembly_1__model_1 | I(q)

1nna__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 non-polymer

6. Fold Classification (SCOP + CATH) 2 domains

SCOP 2.08 (1 domains)

CATH v4.4 (1 domains)

7. Citations (8)

Source organism organism	Influenza A virus
NCBI taxonomy ID ncbi_taxonomy_id	11320

Description description	CALCIUM ION
Molecular weight formula_weight	40.1 kDa
Source method src_method	syn
Copy count entity_count	1

THREE-DIMENSIONAL STRUCTURE OF INFLUENZA A N9 NEURAMINIDASE AND ITS COMPLEX WITH THE INHIBITOR 2-DEOXY 2,3-DEHYDRO-N-ACETYL NEURAMINIC ACID

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

NEURAMINIDASE

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

1nna__assembly_1__model_1

1nna__assembly_1__model_1 | I(q)

1nna__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 non-polymer

6. Fold Classification (SCOP + CATH) 2 domains

SCOP 2.08 (1 domains)

CATH v4.4 (1 domains)

7. Citations (8)