1tzo

Crystal Structure of the Anthrax Toxin Protective Antigen Heptameric Prepore

Method: X-RAY DIFFRACTION

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

Protective antigen

Bacillus anthracis str.

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 7	CALCIUM ION × 14	Consistent with protein count
2	Protein homooligomer	Homooligomer	Protein 7	CALCIUM ION × 14	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	PAG_BACAN
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–562； UniProt 203–764 Author chain B； PDBConstruct 1–562； UniProt 203–764 Author chain C； PDBConstruct 1–562； UniProt 203–764 Author chain D； PDBConstruct 1–562； UniProt 203–764 Author chain E； PDBConstruct 1–562； UniProt 203–764 Author chain F； PDBConstruct 1–562； UniProt 203–764 Author chain G； PDBConstruct 1–562； UniProt 203–764 Author chain H； PDBConstruct 1–562； UniProt 203–764 Author chain I； PDBConstruct 1–562； UniProt 203–764 Author chain J； PDBConstruct 1–562； UniProt 203–764 Author chain K； PDBConstruct 1–562； UniProt 203–764 Author chain L； PDBConstruct 1–562； UniProt 203–764 Author chain M； PDBConstruct 1–562； UniProt 203–764 Author chain O； PDBConstruct 1–562； UniProt 203–764

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	1tzo
Deposition date deposition_date	2004-07-10
Structure title title	Crystal Structure of the Anthrax Toxin Protective Antigen Heptameric Prepore
Keywords keywords	heptamer, 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.

1tzo__assembly_1__model_1

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

Download this curve (.dat)

1tzo__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1tzo__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	52.72 Å
Rg (electron density)	52.52 Å
Total Rg	52.78 Å
Atom count	30569
Residues	3871
Excluded volume	541060 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1tzo__assembly_1__model_1`	heptameric （7）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`1tzo__assembly_2__model_1`	heptameric （7）	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)

Entity 1 Entity 1 polymer

Description description	Protective antigen
Molecular weight formula_weight	63019.0 kDa
Source method src_method	man
Copy count entity_count	14

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B,C,D,E,F,G,H,I,J,K,L,M,O
Atom count atom_count	61138

TVPDRDNDGIPDSLEVEGYTVDVKNKRTFLSPWISNIHEKKGLTKYKSSPEKWSTASDPYSDFEKVTGRIDKNVSPEARHPLVAAYPIVHVDMENIILSKNEDQSTQNTDSQTRTISKNTSTSRTHTSEVHGNAEVHASFFDIGGSVSAGFSNSNSSTVAIDHSLSLAGERTWAETMGLNTADTARLNANIRYVNTGTAPIYNVLPTTSLVLGKNQTLATIKAKENQLSQILAPNNYYPSKNLAPIALNAQDDFSSTPITMNYNQFLELEKTKQLRLDTDQVYGNIATYNFENGRVRVDTGSNWSEVLPQIQETTARIIFNGKDLNLVERRIAAVNPSDPLETTKPDMTLKEALKIAFGFNEPNGNLQYQGKDITEFDFNFDQQTSQNIKNQLAELNATNIYTVLDKIKLNAKMNILIRDKRFHYDRNNIAVGADESVVKEAHREVINSSTEGLLLNIDKDIRKILSGYIVEIEDTEGLKEVINDRYDMLNISSLRQDGKTFIDFKKYNDKLPLYISNPNYKVNVYAVTKENTIINPSENGDTSTNGIKKILIFSKKGYEIG

Source Source

Source organism organism	Bacillus anthracis str.
NCBI taxonomy ID ncbi_taxonomy_id	191218
Host organism host_organism	Escherichia coli

Entity 2 Entity 2 non-polymer

Description description	CALCIUM ION
Molecular weight formula_weight	40.1 kDa
Source method src_method	syn
Copy count entity_count	28

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6. Fold Classification (SCOP + CATH) 70 domains

SCOP 2.08 (28 domains)

Domain ID domain_id	d1tzoa1
Class class	f — Membrane and cell surface proteins and peptides
Fold Fold fold	f.60 — Anthrax protective antigen C-terminal-like
Superfamily Superfamily superfamily	f.60.1 — Anthrax protective antigen C-terminal-like
Family Family family	f.60.1.1 — Anthrax protective antigen C-terminal-like

Domain ID domain_id	d1tzoa2
Class class	b — All beta proteins
Fold Fold fold	b.179 — Anthrax protective antigen N-terminal-like
Superfamily Superfamily superfamily	b.179.1 — PA14-like
Family Family family	b.179.1.1 — PA14

Domain ID domain_id	d1tzob1
Class class	f — Membrane and cell surface proteins and peptides
Fold Fold fold	f.60 — Anthrax protective antigen C-terminal-like
Superfamily Superfamily superfamily	f.60.1 — Anthrax protective antigen C-terminal-like
Family Family family	f.60.1.1 — Anthrax protective antigen C-terminal-like

Domain ID domain_id	d1tzob2
Class class	b — All beta proteins
Fold Fold fold	b.179 — Anthrax protective antigen N-terminal-like
Superfamily Superfamily superfamily	b.179.1 — PA14-like
Family Family family	b.179.1.1 — PA14

Domain ID domain_id	d1tzoc1
Class class	f — Membrane and cell surface proteins and peptides
Fold Fold fold	f.60 — Anthrax protective antigen C-terminal-like
Superfamily Superfamily superfamily	f.60.1 — Anthrax protective antigen C-terminal-like
Family Family family	f.60.1.1 — Anthrax protective antigen C-terminal-like

Domain ID domain_id	d1tzoc2
Class class	b — All beta proteins
Fold Fold fold	b.179 — Anthrax protective antigen N-terminal-like
Superfamily Superfamily superfamily	b.179.1 — PA14-like
Family Family family	b.179.1.1 — PA14

Domain ID domain_id	d1tzod1
Class class	f — Membrane and cell surface proteins and peptides
Fold Fold fold	f.60 — Anthrax protective antigen C-terminal-like
Superfamily Superfamily superfamily	f.60.1 — Anthrax protective antigen C-terminal-like
Family Family family	f.60.1.1 — Anthrax protective antigen C-terminal-like

Domain ID domain_id	d1tzod2
Class class	b — All beta proteins
Fold Fold fold	b.179 — Anthrax protective antigen N-terminal-like
Superfamily Superfamily superfamily	b.179.1 — PA14-like
Family Family family	b.179.1.1 — PA14

Domain ID domain_id	d1tzoe1
Class class	f — Membrane and cell surface proteins and peptides
Fold Fold fold	f.60 — Anthrax protective antigen C-terminal-like
Superfamily Superfamily superfamily	f.60.1 — Anthrax protective antigen C-terminal-like
Family Family family	f.60.1.1 — Anthrax protective antigen C-terminal-like

Domain ID domain_id	d1tzoe2
Class class	b — All beta proteins
Fold Fold fold	b.179 — Anthrax protective antigen N-terminal-like
Superfamily Superfamily superfamily	b.179.1 — PA14-like
Family Family family	b.179.1.1 — PA14

Domain ID domain_id	d1tzof1
Class class	f — Membrane and cell surface proteins and peptides
Fold Fold fold	f.60 — Anthrax protective antigen C-terminal-like
Superfamily Superfamily superfamily	f.60.1 — Anthrax protective antigen C-terminal-like
Family Family family	f.60.1.1 — Anthrax protective antigen C-terminal-like

Domain ID domain_id	d1tzof2
Class class	b — All beta proteins
Fold Fold fold	b.179 — Anthrax protective antigen N-terminal-like
Superfamily Superfamily superfamily	b.179.1 — PA14-like
Family Family family	b.179.1.1 — PA14

Domain ID domain_id	d1tzog1
Class class	f — Membrane and cell surface proteins and peptides
Fold Fold fold	f.60 — Anthrax protective antigen C-terminal-like
Superfamily Superfamily superfamily	f.60.1 — Anthrax protective antigen C-terminal-like
Family Family family	f.60.1.1 — Anthrax protective antigen C-terminal-like

Domain ID domain_id	d1tzog2
Class class	b — All beta proteins
Fold Fold fold	b.179 — Anthrax protective antigen N-terminal-like
Superfamily Superfamily superfamily	b.179.1 — PA14-like
Family Family family	b.179.1.1 — PA14

Domain ID domain_id	d1tzoh1
Class class	f — Membrane and cell surface proteins and peptides
Fold Fold fold	f.60 — Anthrax protective antigen C-terminal-like
Superfamily Superfamily superfamily	f.60.1 — Anthrax protective antigen C-terminal-like
Family Family family	f.60.1.1 — Anthrax protective antigen C-terminal-like

Domain ID domain_id	d1tzoh2
Class class	b — All beta proteins
Fold Fold fold	b.179 — Anthrax protective antigen N-terminal-like
Superfamily Superfamily superfamily	b.179.1 — PA14-like
Family Family family	b.179.1.1 — PA14

Domain ID domain_id	d1tzoi1
Class class	f — Membrane and cell surface proteins and peptides
Fold Fold fold	f.60 — Anthrax protective antigen C-terminal-like
Superfamily Superfamily superfamily	f.60.1 — Anthrax protective antigen C-terminal-like
Family Family family	f.60.1.1 — Anthrax protective antigen C-terminal-like

Domain ID domain_id	d1tzoi2
Class class	b — All beta proteins
Fold Fold fold	b.179 — Anthrax protective antigen N-terminal-like
Superfamily Superfamily superfamily	b.179.1 — PA14-like
Family Family family	b.179.1.1 — PA14

Domain ID domain_id	d1tzoj1
Class class	f — Membrane and cell surface proteins and peptides
Fold Fold fold	f.60 — Anthrax protective antigen C-terminal-like
Superfamily Superfamily superfamily	f.60.1 — Anthrax protective antigen C-terminal-like
Family Family family	f.60.1.1 — Anthrax protective antigen C-terminal-like

Domain ID domain_id	d1tzoj2
Class class	b — All beta proteins
Fold Fold fold	b.179 — Anthrax protective antigen N-terminal-like
Superfamily Superfamily superfamily	b.179.1 — PA14-like
Family Family family	b.179.1.1 — PA14

Domain ID domain_id	d1tzok1
Class class	f — Membrane and cell surface proteins and peptides
Fold Fold fold	f.60 — Anthrax protective antigen C-terminal-like
Superfamily Superfamily superfamily	f.60.1 — Anthrax protective antigen C-terminal-like
Family Family family	f.60.1.1 — Anthrax protective antigen C-terminal-like

Domain ID domain_id	d1tzok2
Class class	b — All beta proteins
Fold Fold fold	b.179 — Anthrax protective antigen N-terminal-like
Superfamily Superfamily superfamily	b.179.1 — PA14-like
Family Family family	b.179.1.1 — PA14

Domain ID domain_id	d1tzol1
Class class	f — Membrane and cell surface proteins and peptides
Fold Fold fold	f.60 — Anthrax protective antigen C-terminal-like
Superfamily Superfamily superfamily	f.60.1 — Anthrax protective antigen C-terminal-like
Family Family family	f.60.1.1 — Anthrax protective antigen C-terminal-like

Domain ID domain_id	d1tzol2
Class class	b — All beta proteins
Fold Fold fold	b.179 — Anthrax protective antigen N-terminal-like
Superfamily Superfamily superfamily	b.179.1 — PA14-like
Family Family family	b.179.1.1 — PA14

Domain ID domain_id	d1tzom1
Class class	f — Membrane and cell surface proteins and peptides
Fold Fold fold	f.60 — Anthrax protective antigen C-terminal-like
Superfamily Superfamily superfamily	f.60.1 — Anthrax protective antigen C-terminal-like
Family Family family	f.60.1.1 — Anthrax protective antigen C-terminal-like

Domain ID domain_id	d1tzom2
Class class	b — All beta proteins
Fold Fold fold	b.179 — Anthrax protective antigen N-terminal-like
Superfamily Superfamily superfamily	b.179.1 — PA14-like
Family Family family	b.179.1.1 — PA14

Domain ID domain_id	d1tzoo1
Class class	f — Membrane and cell surface proteins and peptides
Fold Fold fold	f.60 — Anthrax protective antigen C-terminal-like
Superfamily Superfamily superfamily	f.60.1 — Anthrax protective antigen C-terminal-like
Family Family family	f.60.1.1 — Anthrax protective antigen C-terminal-like

Domain ID domain_id	d1tzoo2
Class class	b — All beta proteins
Fold Fold fold	b.179 — Anthrax protective antigen N-terminal-like
Superfamily Superfamily superfamily	b.179.1 — PA14-like
Family Family family	b.179.1.1 — PA14

CATH v4.4 (42 domains)

Domain ID domain_id	1tzoA02
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	120 — Jelly Rolls
Homologous superfamily homologous superfamily	240 — Protective antigen, heptamerisation domain

Domain ID domain_id	1tzoA03
Class class	3 — Alpha Beta
Architecture architecture	10 — Roll
Topology topology	20 — Ubiquitin-like (UB roll)
Homologous superfamily homologous superfamily	110 —

Domain ID domain_id	1tzoA04
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	810 —

Domain ID domain_id	1tzoB02
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	120 — Jelly Rolls
Homologous superfamily homologous superfamily	240 — Protective antigen, heptamerisation domain

Domain ID domain_id	1tzoB03
Class class	3 — Alpha Beta
Architecture architecture	10 — Roll
Topology topology	20 — Ubiquitin-like (UB roll)
Homologous superfamily homologous superfamily	110 —

Domain ID domain_id	1tzoB04
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	810 —

Domain ID domain_id	1tzoC02
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	120 — Jelly Rolls
Homologous superfamily homologous superfamily	240 — Protective antigen, heptamerisation domain

Domain ID domain_id	1tzoC03
Class class	3 — Alpha Beta
Architecture architecture	10 — Roll
Topology topology	20 — Ubiquitin-like (UB roll)
Homologous superfamily homologous superfamily	110 —

Domain ID domain_id	1tzoC04
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	810 —

Domain ID domain_id	1tzoD02
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	120 — Jelly Rolls
Homologous superfamily homologous superfamily	240 — Protective antigen, heptamerisation domain

Domain ID domain_id	1tzoD03
Class class	3 — Alpha Beta
Architecture architecture	10 — Roll
Topology topology	20 — Ubiquitin-like (UB roll)
Homologous superfamily homologous superfamily	110 —

Domain ID domain_id	1tzoD04
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	810 —

Domain ID domain_id	1tzoE02
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	120 — Jelly Rolls
Homologous superfamily homologous superfamily	240 — Protective antigen, heptamerisation domain

Domain ID domain_id	1tzoE03
Class class	3 — Alpha Beta
Architecture architecture	10 — Roll
Topology topology	20 — Ubiquitin-like (UB roll)
Homologous superfamily homologous superfamily	110 —

Domain ID domain_id	1tzoE04
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	810 —

Domain ID domain_id	1tzoF02
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	120 — Jelly Rolls
Homologous superfamily homologous superfamily	240 — Protective antigen, heptamerisation domain

Domain ID domain_id	1tzoF03
Class class	3 — Alpha Beta
Architecture architecture	10 — Roll
Topology topology	20 — Ubiquitin-like (UB roll)
Homologous superfamily homologous superfamily	110 —

Domain ID domain_id	1tzoF04
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	810 —

Domain ID domain_id	1tzoG02
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	120 — Jelly Rolls
Homologous superfamily homologous superfamily	240 — Protective antigen, heptamerisation domain

Domain ID domain_id	1tzoG03
Class class	3 — Alpha Beta
Architecture architecture	10 — Roll
Topology topology	20 — Ubiquitin-like (UB roll)
Homologous superfamily homologous superfamily	110 —

Domain ID domain_id	1tzoG04
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	810 —

Domain ID domain_id	1tzoH02
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	120 — Jelly Rolls
Homologous superfamily homologous superfamily	240 — Protective antigen, heptamerisation domain

Domain ID domain_id	1tzoH03
Class class	3 — Alpha Beta
Architecture architecture	10 — Roll
Topology topology	20 — Ubiquitin-like (UB roll)
Homologous superfamily homologous superfamily	110 —

Domain ID domain_id	1tzoH04
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	810 —

Domain ID domain_id	1tzoI02
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	120 — Jelly Rolls
Homologous superfamily homologous superfamily	240 — Protective antigen, heptamerisation domain

Domain ID domain_id	1tzoI03
Class class	3 — Alpha Beta
Architecture architecture	10 — Roll
Topology topology	20 — Ubiquitin-like (UB roll)
Homologous superfamily homologous superfamily	110 —

Domain ID domain_id	1tzoI04
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	810 —

Domain ID domain_id	1tzoJ02
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	120 — Jelly Rolls
Homologous superfamily homologous superfamily	240 — Protective antigen, heptamerisation domain

Domain ID domain_id	1tzoJ03
Class class	3 — Alpha Beta
Architecture architecture	10 — Roll
Topology topology	20 — Ubiquitin-like (UB roll)
Homologous superfamily homologous superfamily	110 —

Domain ID domain_id	1tzoJ04
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	810 —

Domain ID domain_id	1tzoK02
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	120 — Jelly Rolls
Homologous superfamily homologous superfamily	240 — Protective antigen, heptamerisation domain

Domain ID domain_id	1tzoK03
Class class	3 — Alpha Beta
Architecture architecture	10 — Roll
Topology topology	20 — Ubiquitin-like (UB roll)
Homologous superfamily homologous superfamily	110 —

Domain ID domain_id	1tzoK04
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	810 —

Domain ID domain_id	1tzoL02
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	120 — Jelly Rolls
Homologous superfamily homologous superfamily	240 — Protective antigen, heptamerisation domain

Domain ID domain_id	1tzoL03
Class class	3 — Alpha Beta
Architecture architecture	10 — Roll
Topology topology	20 — Ubiquitin-like (UB roll)
Homologous superfamily homologous superfamily	110 —

Domain ID domain_id	1tzoL04
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	810 —

Domain ID domain_id	1tzoM02
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	120 — Jelly Rolls
Homologous superfamily homologous superfamily	240 — Protective antigen, heptamerisation domain

Domain ID domain_id	1tzoM03
Class class	3 — Alpha Beta
Architecture architecture	10 — Roll
Topology topology	20 — Ubiquitin-like (UB roll)
Homologous superfamily homologous superfamily	110 —

Domain ID domain_id	1tzoM04
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	810 —

Domain ID domain_id	1tzoO02
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	120 — Jelly Rolls
Homologous superfamily homologous superfamily	240 — Protective antigen, heptamerisation domain

Domain ID domain_id	1tzoO03
Class class	3 — Alpha Beta
Architecture architecture	10 — Roll
Topology topology	20 — Ubiquitin-like (UB roll)
Homologous superfamily homologous superfamily	110 —

Domain ID domain_id	1tzoO04
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	810 —

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Unit-cell length a length_a	149.608 Å
Unit-cell length b length_b	167.028 Å
Unit-cell length c length_c	168.200 Å
Unit-cell angle α angle_alpha	77.56 °
Unit-cell angle β angle_beta	75.74 °
Unit-cell angle γ angle_gamma	76.01 °
Molecules per unit cell Z z_pdb	14

Space group space_group	P 1
Space-group number int_tables_number	1
Crystal system crystal_system	—

Resolution resolution	3.600 Å
Low-resolution limit resolution_low	30.000 Å
R factor r_factor	0.3150
R_work r_work	0.3140
R_free r_free	0.3170

Crystal Structure of the Anthrax Toxin Protective Antigen Heptameric Prepore

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

Protective antigen

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

1tzo__assembly_1__model_1

1tzo__assembly_1__model_1 | I(q)

1tzo__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

Source Source

Entity 2 Entity 2 non-polymer

6. Fold Classification (SCOP + CATH) 70 domains

SCOP 2.08 (28 domains)

CATH v4.4 (42 domains)

7. Citations (1)

Crystal Structure of the Anthrax Toxin Protective Antigen Heptameric Prepore

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

Protective antigen

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

1tzo__assembly_1__model_1

1tzo__assembly_1__model_1 | I(q)

1tzo__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

Source Source

Entity 2 Entity 2 non-polymer

6. Fold Classification (SCOP + CATH) 70 domains

SCOP 2.08 (28 domains)

CATH v4.4 (42 domains)

7. Citations (1)