SAXSdb — 2fsd

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

putative baseplate protein

unidentified phage

State in the Current Structure

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

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	O80120_9CAUD
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 30–142； UniProt 137–267 Author chain B； PDBConstruct 30–142； UniProt 137–267

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	2fsd
Deposition date deposition_date	2006-01-22
Structure title title	A Common Fold for the Receptor Binding Domains of Lactococcal Phages? The Crystal Structure of the Head Domain of Phage bIL170
Keywords keywords	Phage, Lactococcus lactis, receptor binding protein, head domain, 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.

2fsd__assembly_1__model_1

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

Download this curve (.dat)

2fsd__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

2fsd__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	17.97 Å
Rg (electron density)	16.77 Å
Total Rg	17.74 Å
Atom count	1610
Residues	220
Excluded volume	28736 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`2fsd__assembly_1__model_1`	dimeric （2）	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) 2 domains

CATH v4.4 (2 domains)

Domain ID domain_id	2fsdA00
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	2460 — Phage bIL170 RBP, head domain

Domain ID domain_id	2fsdB00
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	2460 — Phage bIL170 RBP, head domain

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Unit-cell length a length_a	69.650 Å
Unit-cell length b length_b	69.650 Å
Unit-cell length c length_c	95.356 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	90.00 °
Unit-cell angle γ angle_gamma	120.00 °
Molecules per unit cell Z z_pdb	12

Space group space_group	P 31 2 1
Space-group number int_tables_number	152
Crystal system crystal_system	—

Resolution resolution	2.300 Å
Low-resolution limit resolution_low	23.800 Å
R factor r_factor	0.2430
R_work r_work	0.2418
R_free r_free	0.2680

Description description	putative baseplate protein
Molecular weight formula_weight	15284.2 kDa
Source method src_method	man
Copy count entity_count	2

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B
Atom count atom_count	1708

A Common Fold for the Receptor Binding Domains of Lactococcal Phages? The Crystal Structure of the Head Domain of Phage bIL170

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

putative baseplate 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

2fsd__assembly_1__model_1

2fsd__assembly_1__model_1 | I(q)

2fsd__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 water

6. Fold Classification (SCOP + CATH) 2 domains

CATH v4.4 (2 domains)

7. Citations (1)

Source organism organism	unidentified phage
NCBI taxonomy ID ncbi_taxonomy_id	38018
Host organism host_organism	Escherichia coli

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	98

A Common Fold for the Receptor Binding Domains of Lactococcal Phages? The Crystal Structure of the Head Domain of Phage bIL170

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

putative baseplate 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

2fsd__assembly_1__model_1

2fsd__assembly_1__model_1 | I(q)

2fsd__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 water

6. Fold Classification (SCOP + CATH) 2 domains

CATH v4.4 (2 domains)

7. Citations (1)