SAXSdb — 3bbl

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

Regulatory protein of LacI family

Chloroflexus aggregans

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 2	1,2-ETHANEDIOL × 8 water × 2	Consistent with protein count
2	Protein homooligomer	Homooligomer	Protein 6	1,2-ETHANEDIOL × 24 water × 6	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	A0H3S5_9CHLR
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 4–279； UniProt 63–338

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	3bbl
Deposition date deposition_date	2007-11-09
Structure title title	Crystal structure of a regulatory protein of LacI family from Chloroflexus aggregans
Keywords keywords	;Protein Structure Initiative II, PSI-II, NYSGXRC, Transcriptional regulator, Periplasmic binding protein, LacI family, Structural Genomics, New York SGX Research Center for Structural Genomics, DNA-binding, Transcription regulation, REGULATORY PROTEIN ;; REGULATORY 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.

3bbl__assembly_1__model_1

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

Download this curve (.dat)

3bbl__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

3bbl__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	26.09 Å
Rg (electron density)	25.18 Å
Total Rg	25.89 Å
Atom count	4470
Residues	546
Excluded volume	79790 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`3bbl__assembly_1__model_1`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`3bbl__assembly_2__model_1`	hexameric （6）	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 (3)

Entity 1 Entity 1 polymer

Description description	Regulatory protein of LacI family
Molecular weight formula_weight	32701.8 kDa
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A
Atom count atom_count	2331

MSLSFMIGYSWTQTEPGQVNHILDQFLSSMVREAGAVNYFVLPFPFSEDRSQIDIYRDLIRSGNVDGFVLSSINYNDPRVQFLLKQKFPFVAFGRSNPDWDFAWVDIDGTAGTRQAVEYLIGRGHRRIAILAWPEDSRVGNDRLQGYLEAMQTAQLPIETGYILRGEGTFEVGRAMTLHLLDLSPERRPTAIMTLNDTMAIGAMAAARERGLTIGTDLAIIGFDDAPMVQYLFPPLSSVRQPIAEAGRKCIELLVAIVEGREPEQKHILLQPSLIIRASEGHHHHHH

Source Source

Source organism organism	Chloroflexus aggregans
NCBI taxonomy ID ncbi_taxonomy_id	326427
Host organism host_organism	Escherichia coli BL21(DE3)

Entity 2 Entity 2 non-polymer

Description description	1,2-ETHANEDIOL
Molecular weight formula_weight	62.1 kDa
Source method src_method	syn
Copy count entity_count	4

Entity 3 Entity 3 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	96

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6. Fold Classification (SCOP + CATH) 5 domains

SCOP 2.08 (3 domains)

Domain ID domain_id	d3bbla1
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.93 — Periplasmic binding protein-like I
Superfamily Superfamily superfamily	c.93.1 — Periplasmic binding protein-like I
Family Family family	c.93.1.0 — automated matches

Domain ID domain_id	d3bbla2
Class class	l — Artifacts
Fold Fold fold	l.1 — Tags
Superfamily Superfamily superfamily	l.1.1 — Tags
Family Family family	l.1.1.1 — Tags

Domain ID domain_id	d3bbla3
Class class	l — Artifacts
Fold Fold fold	l.1 — Tags
Superfamily Superfamily superfamily	l.1.1 — Tags
Family Family family	l.1.1.1 — Tags

CATH v4.4 (2 domains)

Domain ID domain_id	3bblA01
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	2300 — Response regulator

Domain ID domain_id	3bblA02
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	2300 — Response regulator

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Unit-cell length a length_a	122.550 Å
Unit-cell length b length_b	122.550 Å
Unit-cell length c length_c	123.301 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 63 2 2
Space-group number int_tables_number	182
Crystal system crystal_system	—

Resolution resolution	2.350 Å
Low-resolution limit resolution_low	35.380 Å
R factor r_factor	0.2410
R_work r_work	0.2400
R_free r_free	0.2580

Crystal structure of a regulatory protein of LacI family from Chloroflexus aggregans

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

Regulatory protein of LacI family

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

3bbl__assembly_1__model_1

3bbl__assembly_1__model_1 | I(q)

3bbl__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 (3)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 water

6. Fold Classification (SCOP + CATH) 5 domains

SCOP 2.08 (3 domains)

CATH v4.4 (2 domains)

7. Citations (1)

Crystal structure of a regulatory protein of LacI family from Chloroflexus aggregans

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

Regulatory protein of LacI family

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

3bbl__assembly_1__model_1

3bbl__assembly_1__model_1 | I(q)

3bbl__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 (3)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 water

6. Fold Classification (SCOP + CATH) 5 domains

SCOP 2.08 (3 domains)

CATH v4.4 (2 domains)

7. Citations (1)