SAXSdb — 2x7x

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

SENSOR PROTEIN

BACTEROIDES THETAIOTAOMICRON

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 2	PHOSPHATE ION × 4 beta-D-fructofuranose × 2 POTASSIUM ION × 3 water × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	Q8A6X1_BACTN
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 3–317； UniProt 29–343 Author chain B； PDBConstruct 3–317； UniProt 29–343

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	2x7x
Deposition date deposition_date	2010-03-04
Structure title title	Fructose binding periplasmic domain of hybrid two component system BT1754
Keywords keywords	TRANSFERASE, SENSOR HISTIDINE KINASE; TRANSFERASE
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.

2x7x__assembly_1__model_1

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

Download this curve (.dat)

2x7x__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

2x7x__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	28.46 Å
Rg (electron density)	27.83 Å
Total Rg	28.52 Å
Atom count	4643
Residues	601
Excluded volume	82615 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`2x7x__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 (5)

Entity 1 Entity 1 polymer

Description description	SENSOR PROTEIN
Molecular weight formula_weight	36119.9 kDa
EC 编号 ec_number	2.7.13.3
Source method src_method	man
Copy count entity_count	2

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B
Atom count atom_count	4731

MDDTPHFRIGVAQCSDDSWRHKMNDEILREAMFYNGVSVEIRSAGDDNSKQAEDVHYFMDEGVDLLIISANEAAPMTPIVEEAYQKGIPVILVDRKILSDKYTAYIGADNYEIGRSVGNYIASSLKGKGNIVELTGLSGSTPAMERHQGFMAAISKFPDIKLIDKADAAWERGPAEIEMDSMLRRHPKIDAVYAHNDRIAPGAYQAAKMAGREKEMIFVGIDALPGKGNGLELVLDSVLDATFIYPTNGDKVLQLAMDILEKKPYPKETVMNTAVVDRTNAHVMQLQTTHISELDKKIETLNGRIGGYLSQVATQQVLEHHHHHH

Source Source

Source organism organism	BACTEROIDES THETAIOTAOMICRON
NCBI taxonomy ID ncbi_taxonomy_id	226186
Host organism host_organism	ESCHERICHIA COLI BL21(DE3)

Entity 2 Entity 2 non-polymer

Description description	PHOSPHATE ION
Molecular weight formula_weight	95.0 kDa
Source method src_method	syn
Copy count entity_count	4

Entity 3 Entity 3 non-polymer

Description description	beta-D-fructofuranose
Molecular weight formula_weight	180.2 kDa
Source method src_method	man
Copy count entity_count	2

Entity 4 Entity 4 non-polymer

Description description	POTASSIUM ION
Molecular weight formula_weight	39.1 kDa
Source method src_method	syn
Copy count entity_count	3

Entity 5 Entity 5 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	88

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6. Fold Classification (SCOP + CATH) 8 domains

SCOP 2.08 (2 domains)

Domain ID domain_id	d2x7xa_
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	d2x7xb_
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

CATH v4.4 (6 domains)

Domain ID domain_id	2x7xA01
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	2x7xA02
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	2x7xA03
Class class	6 — Special
Architecture architecture	10 — Helix non-globular
Topology topology	250 — Single alpha-helices involved in coiled-coils or other helix-helix interfaces
Homologous superfamily homologous superfamily	850 —

Domain ID domain_id	2x7xB01
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	2x7xB02
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	2x7xB03
Class class	6 — Special
Architecture architecture	10 — Helix non-globular
Topology topology	250 — Single alpha-helices involved in coiled-coils or other helix-helix interfaces
Homologous superfamily homologous superfamily	850 —

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Unit-cell length a length_a	111.840 Å
Unit-cell length b length_b	111.840 Å
Unit-cell length c length_c	115.171 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 65
Space-group number int_tables_number	170
Crystal system crystal_system	—

Resolution resolution	2.640 Å
Low-resolution limit resolution_low	35.690 Å
R factor r_factor	0.1884
R_work r_work	0.1860
R_free r_free	0.2319

Fructose binding periplasmic domain of hybrid two component system BT1754

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

SENSOR 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

2x7x__assembly_1__model_1

2x7x__assembly_1__model_1 | I(q)

2x7x__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 (5)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 non-polymer

Entity 5 Entity 5 water

6. Fold Classification (SCOP + CATH) 8 domains

SCOP 2.08 (2 domains)

CATH v4.4 (6 domains)

7. Citations (1)

Fructose binding periplasmic domain of hybrid two component system BT1754

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

SENSOR 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

2x7x__assembly_1__model_1

2x7x__assembly_1__model_1 | I(q)

2x7x__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 (5)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 non-polymer

Entity 5 Entity 5 water

6. Fold Classification (SCOP + CATH) 8 domains

SCOP 2.08 (2 domains)

CATH v4.4 (6 domains)

7. Citations (1)