SAXSdb — 1en7

▼

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

RECOMBINATION ENDONUCLEASE VII

Enterobacteria phage T4

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 2	ZINC ION × 2 CALCIUM ION × 3 water × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	END7_BPT4
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–157； UniProt 1–157 Author chain B； PDBConstruct 1–157； UniProt 1–157

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.

▼

2. Structure Basics 2. Structure Basics

Entry ID entry_id	1en7
Deposition date deposition_date	1999-02-07
Structure title title	ENDONUCLEASE VII (ENDOVII) FROM PHAGE T4
Keywords keywords	ENDONUCLEASE, RESOLVASE, HOLLIDAY JUNCTION, DNASE, HYDROLASE; HYDROLASE
Experimental Method method	X-RAY DIFFRACTION

▼

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.

1en7__assembly_1__model_1

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

Download this curve (.dat)

1en7__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1en7__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	26.06 Å
Rg (electron density)	25.97 Å
Total Rg	26.49 Å
Atom count	2549
Residues	314
Excluded volume	45344 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1en7__assembly_1__model_1`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download

▶

4. Crystallography and Experiment 4. Crystallography & Experiment

▶

5. Entities and Polymers Entities & Polymers (4)

Entity 1 Entity 1 polymer

Description description	RECOMBINATION ENDONUCLEASE VII
Molecular weight formula_weight	18173.8 kDa
EC 编号 ec_number	3.1.22.4
Source method src_method	man
Copy count entity_count	2

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B
Atom count atom_count	2622

MLLTGKLYKEEKQKFYDAQNGKCLICQRELNPDVQANHLDHDHELNGPKAGKVRGLLCNLCNAAEGQMKHKFNRSGLKGQGVDYLEWLENLLTYLKSDYTQNNIHPNFVGDKSKEFSRLGKEEMMAEMLQRGFEYNESDTKTQLIASFKKQLRKSLK

Source Source

Source organism organism	Enterobacteria phage T4
NCBI taxonomy ID ncbi_taxonomy_id	10665
Host organism host_organism	Escherichia coli BL21

Entity 2 Entity 2 non-polymer

Description description	ZINC ION
Molecular weight formula_weight	65.4 kDa
Source method src_method	syn
Copy count entity_count	2

Entity 3 Entity 3 non-polymer

Description description	CALCIUM ION
Molecular weight formula_weight	40.1 kDa
Source method src_method	syn
Copy count entity_count	3

Entity 4 Entity 4 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	73

▼

6. Fold Classification (SCOP + CATH) 8 domains

SCOP 2.08 (4 domains)

Domain ID domain_id	d1en7a1
Class class	a — All alpha proteins
Fold Fold fold	a.140 — LEM/SAP HeH motif
Superfamily Superfamily superfamily	a.140.4 — Recombination endonuclease VII, C-terminal and dimerization domains
Family Family family	a.140.4.1 — Recombination endonuclease VII, C-terminal and dimerization domains

Domain ID domain_id	d1en7a2
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.4 — His-Me finger endonucleases
Superfamily Superfamily superfamily	d.4.1 — His-Me finger endonucleases
Family Family family	d.4.1.5 — Recombination endonuclease VII, N-terminal domain

Domain ID domain_id	d1en7b1
Class class	a — All alpha proteins
Fold Fold fold	a.140 — LEM/SAP HeH motif
Superfamily Superfamily superfamily	a.140.4 — Recombination endonuclease VII, C-terminal and dimerization domains
Family Family family	a.140.4.1 — Recombination endonuclease VII, C-terminal and dimerization domains

Domain ID domain_id	d1en7b2
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.4 — His-Me finger endonucleases
Superfamily Superfamily superfamily	d.4.1 — His-Me finger endonucleases
Family Family family	d.4.1.5 — Recombination endonuclease VII, N-terminal domain

CATH v4.4 (4 domains)

Domain ID domain_id	1en7A01
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	1800 — His-Me finger endonuclease fold
Homologous superfamily homologous superfamily	10 — His-Me finger endonucleases

Domain ID domain_id	1en7A02
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	720 — Transcription Termination Factor Rho, Rna-binding Domain; Chain A, Domain 1
Homologous superfamily homologous superfamily	10 —

Domain ID domain_id	1en7B01
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	1800 — His-Me finger endonuclease fold
Homologous superfamily homologous superfamily	10 — His-Me finger endonucleases

Domain ID domain_id	1en7B02
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	720 — Transcription Termination Factor Rho, Rna-binding Domain; Chain A, Domain 1
Homologous superfamily homologous superfamily	10 —

▶

Unit-cell length a length_a	144.990 Å
Unit-cell length b length_b	39.450 Å
Unit-cell length c length_c	75.750 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	106.20 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	8

Space group space_group	C 1 2 1
Space-group number int_tables_number	5
Crystal system crystal_system	—

Resolution resolution	2.400 Å
Low-resolution limit resolution_low	10.000 Å
R factor r_factor	—
R_work r_work	0.2395
R_free r_free	0.3080

ENDONUCLEASE VII (ENDOVII) FROM PHAGE T4

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

RECOMBINATION ENDONUCLEASE VII

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

1en7__assembly_1__model_1

1en7__assembly_1__model_1 | I(q)

1en7__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 (4)

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 water

6. Fold Classification (SCOP + CATH) 8 domains

SCOP 2.08 (4 domains)

CATH v4.4 (4 domains)

7. Citations (1)

ENDONUCLEASE VII (ENDOVII) FROM PHAGE T4

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

RECOMBINATION ENDONUCLEASE VII

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

1en7__assembly_1__model_1

1en7__assembly_1__model_1 | I(q)

1en7__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 (4)

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 water

6. Fold Classification (SCOP + CATH) 8 domains

SCOP 2.08 (4 domains)

CATH v4.4 (4 domains)

7. Citations (1)