SAXSdb — 1unk

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

COLICIN E7

OrganismNot specified

State in the Current Structure

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

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	IMM7_ECOLI
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–87； UniProt 1–87 Author chain B； PDBConstruct 1–87； UniProt 1–87 Author chain C； PDBConstruct 1–87； UniProt 1–87 Author chain D； PDBConstruct 1–87； UniProt 1–87

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	1unk
Deposition date deposition_date	1996-06-21
Structure title title	STRUCTURE OF COLICIN E7 IMMUNITY PROTEIN
Keywords keywords	IMMUNITY PROTEIN, DIMERIC STRUCTURE, RNASE ACTIVE SITE; IMMUNITY 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.

1unk__assembly_1__model_1

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

Download this curve (.dat)

1unk__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1unk__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	24.21 Å
Rg (electron density)	23.20 Å
Total Rg	24.15 Å
Atom count	3380
Residues	348
Excluded volume	49341 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1unk__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) 8 domains

SCOP 2.08 (4 domains)

Domain ID domain_id	d1unka_
Class class	a — All alpha proteins
Fold Fold fold	a.28 — Acyl carrier protein-like
Superfamily Superfamily superfamily	a.28.2 — Colicin E immunity proteins
Family Family family	a.28.2.1 — Colicin E immunity proteins

Domain ID domain_id	d1unkb_
Class class	a — All alpha proteins
Fold Fold fold	a.28 — Acyl carrier protein-like
Superfamily Superfamily superfamily	a.28.2 — Colicin E immunity proteins
Family Family family	a.28.2.1 — Colicin E immunity proteins

Domain ID domain_id	d1unkc_
Class class	a — All alpha proteins
Fold Fold fold	a.28 — Acyl carrier protein-like
Superfamily Superfamily superfamily	a.28.2 — Colicin E immunity proteins
Family Family family	a.28.2.1 — Colicin E immunity proteins

Domain ID domain_id	d1unkd_
Class class	a — All alpha proteins
Fold Fold fold	a.28 — Acyl carrier protein-like
Superfamily Superfamily superfamily	a.28.2 — Colicin E immunity proteins
Family Family family	a.28.2.1 — Colicin E immunity proteins

CATH v4.4 (4 domains)

Domain ID domain_id	1unkA00
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	1200 — Non-ribosomal Peptide Synthetase Peptidyl Carrier Protein; Chain A
Homologous superfamily homologous superfamily	20 — Colicin E immunity protein

Domain ID domain_id	1unkB00
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	1200 — Non-ribosomal Peptide Synthetase Peptidyl Carrier Protein; Chain A
Homologous superfamily homologous superfamily	20 — Colicin E immunity protein

Domain ID domain_id	1unkC00
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	1200 — Non-ribosomal Peptide Synthetase Peptidyl Carrier Protein; Chain A
Homologous superfamily homologous superfamily	20 — Colicin E immunity protein

Domain ID domain_id	1unkD00
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	1200 — Non-ribosomal Peptide Synthetase Peptidyl Carrier Protein; Chain A
Homologous superfamily homologous superfamily	20 — Colicin E immunity protein

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Unit-cell length a length_a	28.900 Å
Unit-cell length b length_b	101.700 Å
Unit-cell length c length_c	52.600 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	92.60 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	8

Space group space_group	P 1 21 1
Space-group number int_tables_number	4
Crystal system crystal_system	—

Resolution resolution	1.800 Å
Low-resolution limit resolution_low	6.000 Å
R factor r_factor	0.1800
R_work r_work	0.1800
R_free r_free	0.2510

Description description	COLICIN E7
Molecular weight formula_weight	9907.0 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	3761

STRUCTURE OF COLICIN E7 IMMUNITY PROTEIN

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

COLICIN E7

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

1unk__assembly_1__model_1

1unk__assembly_1__model_1 | I(q)

1unk__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

Entity 2 Entity 2 water

6. Fold Classification (SCOP + CATH) 8 domains

SCOP 2.08 (4 domains)

CATH v4.4 (4 domains)

7. Citations (1)

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	127

STRUCTURE OF COLICIN E7 IMMUNITY PROTEIN

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

COLICIN E7

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

1unk__assembly_1__model_1

1unk__assembly_1__model_1 | I(q)

1unk__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

Entity 2 Entity 2 water

6. Fold Classification (SCOP + CATH) 8 domains

SCOP 2.08 (4 domains)

CATH v4.4 (4 domains)

7. Citations (1)