SAXSdb — 4zi0

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

Polymerase acidic protein

Influenza A virus (strain A/Puerto Rico/8/1934 H1N1)

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein monomer	Monomer	Protein 1	SULFATE ION × 1 MANGANESE (II) ION × 2 4-{(E)-[2-(4-chlorophenyl)hydrazinylidene]methyl}benzene-1,2,3-triol × 1 water × 1	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	PA_I34A1
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 6–55； UniProt 1–50 Author chain A； PDBConstruct 58–182； UniProt 73–197

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	4zi0
Deposition date deposition_date	2015-04-27
Structure title title	Endonuclease inhibitor bound to influenza strain H1N1 polymerase acidic subunit N-terminal region without a chelation to the metal ions in the active site
Keywords keywords	Hydrolase-Hydrolase Inhibitor complex; HYDROLASE/HYDROLASE 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.

4zi0__assembly_1__model_1

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

Download this curve (.dat)

4zi0__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

4zi0__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	17.45 Å
Rg (electron density)	16.27 Å
Total Rg	17.24 Å
Atom count	1519
Residues	181
Excluded volume	26963 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`4zi0__assembly_1__model_1`	monomeric （1）	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 (5)

Entity 1 Entity 1 polymer

Description description	Polymerase acidic protein
Molecular weight formula_weight	22300.5 kDa
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A
Atom count atom_count	1722

GPLGSMEDFVRQCFNPMIVELAEKTMKEYGEDLKIETNKFAAICTHLEVCFMYSDASKHRFEIIEGRDRTMAWTVVNSICNTTGAEKPKFLPDLYDYKENRFIEIGVTRREVHIYYLEKANKIKSEKTHIHIFSFTGEEMATKADYTLDEESRARIKTRLFTIRQEMASRGLWDSFRQSERGAAELALVPR

Source Source

Source organism organism	Influenza A virus (strain A/Puerto Rico/8/1934 H1N1)
NCBI taxonomy ID ncbi_taxonomy_id	211044
Host organism host_organism	Escherichia coli

Entity 2 Entity 2 non-polymer

Description description	SULFATE ION
Molecular weight formula_weight	96.1 kDa
Source method src_method	syn
Copy count entity_count	1

Entity 3 Entity 3 non-polymer

Description description	MANGANESE (II) ION
Molecular weight formula_weight	54.9 kDa
Source method src_method	syn
Copy count entity_count	2

Entity 4 Entity 4 non-polymer

Description description	4-{(E)-[2-(4-chlorophenyl)hydrazinylidene]methyl}benzene-1,2,3-triol
Molecular weight formula_weight	278.7 kDa
Source method src_method	syn
Copy count entity_count	1

Entity 5 Entity 5 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	203

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6. Fold Classification (SCOP + CATH) 3 domains

SCOP 2.08 (2 domains)

Domain ID domain_id	d4zi0a1
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.52 — Restriction endonuclease-like
Superfamily Superfamily superfamily	c.52.1 — Restriction endonuclease-like
Family Family family	c.52.1.34 — PA N-terminal domain

Domain ID domain_id	d4zi0a2
Class class	l — Artifacts
Fold Fold fold	l.1 — Tags
Superfamily Superfamily superfamily	l.1.1 — Tags
Family Family family	l.1.1.1 — Tags

CATH v4.4 (1 domains)

Domain ID domain_id	4zi0A00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	91 — Restriction Endonuclease
Homologous superfamily homologous superfamily	90 — Influenza RNA-dependent RNA polymerase subunit PA, endonuclease domain

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Unit-cell length a length_a	66.758 Å
Unit-cell length b length_b	66.758 Å
Unit-cell length c length_c	126.744 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	8

Space group space_group	P 41 21 2
Space-group number int_tables_number	92
Crystal system crystal_system	—

Resolution resolution	1.802 Å
Low-resolution limit resolution_low	32.278 Å
R factor r_factor	0.2011
R_work r_work	0.1998
R_free r_free	0.2247

Endonuclease inhibitor bound to influenza strain H1N1 polymerase acidic subunit N-terminal region without a chelation to the metal ions in the active site

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

Polymerase acidic protein

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

4zi0__assembly_1__model_1

4zi0__assembly_1__model_1 | I(q)

4zi0__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 (5)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 non-polymer

Entity 5 Entity 5 water

6. Fold Classification (SCOP + CATH) 3 domains

SCOP 2.08 (2 domains)

CATH v4.4 (1 domains)

7. Citations (1)

Endonuclease inhibitor bound to influenza strain H1N1 polymerase acidic subunit N-terminal region without a chelation to the metal ions in the active site

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

Polymerase acidic protein

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

4zi0__assembly_1__model_1

4zi0__assembly_1__model_1 | I(q)

4zi0__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 (5)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 non-polymer

Entity 5 Entity 5 water

6. Fold Classification (SCOP + CATH) 3 domains

SCOP 2.08 (2 domains)

CATH v4.4 (1 domains)

7. Citations (1)