SAXSdb — 2ibo

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

Hypothetical protein SP2199

Streptococcus pneumoniae TIGR4

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	Q97N67_STRPN
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–96； UniProt 1–96 Author chain B； PDBConstruct 1–96； UniProt 1–96 Author chain C； PDBConstruct 1–96； UniProt 1–96 Author chain D； PDBConstruct 1–96； UniProt 1–96

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	2ibo
Deposition date deposition_date	2006-09-11
Structure title title	X-ray Crystal Structure of Protein SP2199 from Streptococcus pneumoniae. Northeast Structural Genomics Consortium Target SpR31
Keywords keywords	;alpha-beta protein, Structural Genomics, PSI-2, Protein Structure Initiative, Northeast Structural Genomics Consortium, NESG, UNKNOWN FUNCTION ;; STRUCTURAL GENOMICS, UNKNOWN FUNCTION
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.

2ibo__assembly_1__model_1

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

Download this curve (.dat)

2ibo__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

2ibo__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	20.76 Å
Rg (electron density)	19.12 Å
Total Rg	20.20 Å
Atom count	2796
Residues	348
Excluded volume	51039 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`2ibo__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	d2iboa1
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.58 — Ferredoxin-like
Superfamily Superfamily superfamily	d.58.48 — MTH1187/YkoF-like
Family Family family	d.58.48.1 — MTH1187-like

Domain ID domain_id	d2ibob_
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.58 — Ferredoxin-like
Superfamily Superfamily superfamily	d.58.48 — MTH1187/YkoF-like
Family Family family	d.58.48.1 — MTH1187-like

Domain ID domain_id	d2iboc_
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.58 — Ferredoxin-like
Superfamily Superfamily superfamily	d.58.48 — MTH1187/YkoF-like
Family Family family	d.58.48.1 — MTH1187-like

Domain ID domain_id	d2ibod_
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.58 — Ferredoxin-like
Superfamily Superfamily superfamily	d.58.48 — MTH1187/YkoF-like
Family Family family	d.58.48.1 — MTH1187-like

CATH v4.4 (4 domains)

Domain ID domain_id	2iboA00
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	70 — Alpha-Beta Plaits
Homologous superfamily homologous superfamily	930 —

Domain ID domain_id	2iboB00
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	70 — Alpha-Beta Plaits
Homologous superfamily homologous superfamily	930 —

Domain ID domain_id	2iboC00
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	70 — Alpha-Beta Plaits
Homologous superfamily homologous superfamily	930 —

Domain ID domain_id	2iboD00
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	70 — Alpha-Beta Plaits
Homologous superfamily homologous superfamily	930 —

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Unit-cell length a length_a	91.901 Å
Unit-cell length b length_b	91.901 Å
Unit-cell length c length_c	156.364 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	32

Space group space_group	P 43 21 2
Space-group number int_tables_number	96
Crystal system crystal_system	—

Resolution resolution	2.800 Å
Low-resolution limit resolution_low	45.340 Å
R factor r_factor	0.2430
R_work r_work	0.2430
R_free r_free	0.2850

Description description	Hypothetical protein SP2199
Molecular weight formula_weight	11938.1 kDa
Source method src_method	man
Copy count entity_count	4

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B,C,D
Atom count atom_count	2905

X-ray Crystal Structure of Protein SP2199 from Streptococcus pneumoniae. Northeast Structural Genomics Consortium Target SpR31

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

Hypothetical protein SP2199

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

2ibo__assembly_1__model_1

2ibo__assembly_1__model_1 | I(q)

2ibo__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) 8 domains

SCOP 2.08 (4 domains)

CATH v4.4 (4 domains)

7. Citations (1)

Source organism organism	Streptococcus pneumoniae TIGR4
NCBI taxonomy ID ncbi_taxonomy_id	170187
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	109

X-ray Crystal Structure of Protein SP2199 from Streptococcus pneumoniae. Northeast Structural Genomics Consortium Target SpR31

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

Hypothetical protein SP2199

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

2ibo__assembly_1__model_1

2ibo__assembly_1__model_1 | I(q)

2ibo__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) 8 domains

SCOP 2.08 (4 domains)

CATH v4.4 (4 domains)

7. Citations (1)