SAXSdb — 2x8k

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

HYPOTHETICAL PROTEIN 19.1

BACILLUS PHAGE SPP1

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 12	No other associated polymer	Consistent with protein count
2	Protein homooligomer	Homooligomer	Protein 12	No other associated polymer	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	O48459_BPSPP
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–252； UniProt 2–253 Author chain B； PDBConstruct 1–252； UniProt 2–253 Author chain C； PDBConstruct 1–252； UniProt 2–253

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	2x8k
Deposition date deposition_date	2010-03-10
Structure title title	Crystal Structure of SPP1 Dit (gp 19.1) Protein, a Paradigm of Hub Adsorption Apparatus in Gram-positive Infecting Phages.
Keywords keywords	VIRAL PROTEIN, DISTAL TAIL 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.

2x8k__assembly_2__model_1

Assembly 2 · Model 1 · CRYSOL 4.1.3-1-20251215 (887e7ef)

Download this curve (.dat)

2x8k__assembly_2__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

2x8k__assembly_2__model_1 | P(r) · Pending

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

Rg（Guinier）	53.67 Å
Rg (electron density)	52.98 Å
Total Rg	53.30 Å
Atom count	22840
Residues	2908
Excluded volume	406730 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`2x8k__assembly_1__model_1`	dodecameric （12）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`2x8k__assembly_2__model_1`	dodecameric （12）	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	2x8kA01
Class class	2 — Mainly Beta
Architecture architecture	40 — Beta Barrel
Topology topology	30 — Elongation Factor Tu (Ef-tu); domain 3
Homologous superfamily homologous superfamily	200 —

Domain ID domain_id	2x8kA02
Class class	6 — Special
Architecture architecture	20 — Other non-globular
Topology topology	370 — Rhinovirus 14, subunit 4
Homologous superfamily homologous superfamily	30 —

Domain ID domain_id	2x8kA03
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	120 — Jelly Rolls
Homologous superfamily homologous superfamily	860 —

Domain ID domain_id	2x8kB01
Class class	2 — Mainly Beta
Architecture architecture	40 — Beta Barrel
Topology topology	30 — Elongation Factor Tu (Ef-tu); domain 3
Homologous superfamily homologous superfamily	200 —

Domain ID domain_id	2x8kB02
Class class	6 — Special
Architecture architecture	20 — Other non-globular
Topology topology	370 — Rhinovirus 14, subunit 4
Homologous superfamily homologous superfamily	30 —

Domain ID domain_id	2x8kB03
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	120 — Jelly Rolls
Homologous superfamily homologous superfamily	860 —

Domain ID domain_id	2x8kC01
Class class	2 — Mainly Beta
Architecture architecture	40 — Beta Barrel
Topology topology	30 — Elongation Factor Tu (Ef-tu); domain 3
Homologous superfamily homologous superfamily	200 —

Domain ID domain_id	2x8kC02
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	120 — Jelly Rolls
Homologous superfamily homologous superfamily	860 —

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Unit-cell length a length_a	107.188 Å
Unit-cell length b length_b	125.745 Å
Unit-cell length c length_c	189.353 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	90.00 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	24

Space group space_group	I 2 2 2
Space-group number int_tables_number	23
Crystal system crystal_system	—

Resolution resolution	2.950 Å
Low-resolution limit resolution_low	34.370 Å
R factor r_factor	0.2016
R_work r_work	0.2003
R_free r_free	0.2361

Description description	HYPOTHETICAL PROTEIN 19.1
Molecular weight formula_weight	28429.0 kDa
Source method src_method	man
Copy count entity_count	3

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B,C
Atom count atom_count	5710

Crystal Structure of SPP1 Dit (gp 19.1) Protein, a Paradigm of Hub Adsorption Apparatus in Gram-positive Infecting Phages.

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

HYPOTHETICAL PROTEIN 19.1

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

2x8k__assembly_2__model_1

2x8k__assembly_2__model_1 | I(q)

2x8k__assembly_2__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 (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	BACILLUS PHAGE SPP1
NCBI taxonomy ID ncbi_taxonomy_id	10724
Host organism host_organism	ESCHERICHIA COLI

Crystal Structure of SPP1 Dit (gp 19.1) Protein, a Paradigm of Hub Adsorption Apparatus in Gram-positive Infecting Phages.

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

HYPOTHETICAL PROTEIN 19.1

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

2x8k__assembly_2__model_1

2x8k__assembly_2__model_1 | I(q)

2x8k__assembly_2__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 (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)