SAXSdb — 7lw0

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

Terminase small subunit

Escherichia phage lambda

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 8	No other associated polymer	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	TERS_LAMBD
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–56； UniProt 1–56 Author chain B； PDBConstruct 1–56； UniProt 1–56 Author chain C； PDBConstruct 1–56； UniProt 1–56 Author chain D； PDBConstruct 1–56； UniProt 1–56 Author chain E； PDBConstruct 1–56； UniProt 1–56 Author chain F； PDBConstruct 1–56； UniProt 1–56 Author chain G； PDBConstruct 1–56； UniProt 1–56 Author chain H； PDBConstruct 1–56； UniProt 1–56

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	7lw0
Deposition date deposition_date	2021-02-26
Structure title title	Structural and Biochemical Insight into Assembly of Molecular Motors Involved in Viral DNA Packaging
Keywords keywords	DNA Packaging, Terminase, VIRAL PROTEIN; VIRAL 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.

7lw0__assembly_1__model_1

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

Download this curve (.dat)

7lw0__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

7lw0__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	26.28 Å
Rg (electron density)	25.33 Å
Total Rg	26.19 Å
Atom count	3504
Residues	448
Excluded volume	62067 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`7lw0__assembly_1__model_1`	octameric （8）	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 (1)

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6. Fold Classification (SCOP + CATH) 8 domains

CATH v4.4 (8 domains)

Domain ID domain_id	7lw0A01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	10 — Arc Repressor Mutant, subunit A
Homologous superfamily homologous superfamily	10 — Winged helix-like DNA-binding domain superfamily/Winged helix DNA-binding domain

Domain ID domain_id	7lw0B01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	10 — Arc Repressor Mutant, subunit A
Homologous superfamily homologous superfamily	10 — Winged helix-like DNA-binding domain superfamily/Winged helix DNA-binding domain

Domain ID domain_id	7lw0C01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	10 — Arc Repressor Mutant, subunit A
Homologous superfamily homologous superfamily	10 — Winged helix-like DNA-binding domain superfamily/Winged helix DNA-binding domain

Domain ID domain_id	7lw0D01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	10 — Arc Repressor Mutant, subunit A
Homologous superfamily homologous superfamily	10 — Winged helix-like DNA-binding domain superfamily/Winged helix DNA-binding domain

Domain ID domain_id	7lw0E01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	10 — Arc Repressor Mutant, subunit A
Homologous superfamily homologous superfamily	10 — Winged helix-like DNA-binding domain superfamily/Winged helix DNA-binding domain

Domain ID domain_id	7lw0F01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	10 — Arc Repressor Mutant, subunit A
Homologous superfamily homologous superfamily	10 — Winged helix-like DNA-binding domain superfamily/Winged helix DNA-binding domain

Domain ID domain_id	7lw0G01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	10 — Arc Repressor Mutant, subunit A
Homologous superfamily homologous superfamily	10 — Winged helix-like DNA-binding domain superfamily/Winged helix DNA-binding domain

Domain ID domain_id	7lw0H01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	10 — Arc Repressor Mutant, subunit A
Homologous superfamily homologous superfamily	10 — Winged helix-like DNA-binding domain superfamily/Winged helix DNA-binding domain

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Unit-cell length a length_a	41.748 Å
Unit-cell length b length_b	42.772 Å
Unit-cell length c length_c	57.222 Å
Unit-cell angle α angle_alpha	89.98 °
Unit-cell angle β angle_beta	89.98 °
Unit-cell angle γ angle_gamma	89.88 °
Molecules per unit cell Z z_pdb	8

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

Resolution resolution	2.320 Å
Low-resolution limit resolution_low	34.260 Å
R factor r_factor	0.1222
R_work r_work	0.1189
R_free r_free	0.1517

Description description	Terminase small subunit
Molecular weight formula_weight	6264.1 kDa
EC 编号 ec_number	3.6.4.-
Source method src_method	man
Copy count entity_count	8

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B,C,D,E,F,G,H
Atom count atom_count	3504

Structural and Biochemical Insight into Assembly of Molecular Motors Involved in Viral DNA Packaging

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

Terminase small subunit

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

7lw0__assembly_1__model_1

7lw0__assembly_1__model_1 | I(q)

7lw0__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 (1)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

6. Fold Classification (SCOP + CATH) 8 domains

CATH v4.4 (8 domains)

7. Citations (1)

Source organism organism	Escherichia phage lambda
Common name common_name	Bacteriophage lambda
NCBI taxonomy ID ncbi_taxonomy_id	10710
Host organism host_organism	Escherichia coli

Structural and Biochemical Insight into Assembly of Molecular Motors Involved in Viral DNA Packaging

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

Terminase small subunit

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

7lw0__assembly_1__model_1

7lw0__assembly_1__model_1 | I(q)

7lw0__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 (1)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

6. Fold Classification (SCOP + CATH) 8 domains

CATH v4.4 (8 domains)

7. Citations (1)