SAXSdb — 3b5d

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

Multidrug transporter emrE

Escherichia coli K12

State in the Current Structure

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

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	EMRE_ECOLI
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–110； UniProt 1–110 Author chain B； PDBConstruct 1–110； UniProt 1–110

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	3b5d
Deposition date deposition_date	2007-10-25
Structure title title	EmrE multidrug transporter in complex with TPP, C2 crystal form
Keywords keywords	;HELICAL MEMBRANE PROTEIN, MULTIDRUG RESISTANCE TRANSPORTER, SMR, Antiport, Inner membrane, Transmembrane, Joint Center for Innovative Membrane Protein Technologies, MEMBRANE PROTEIN ;; MEMBRANE 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.

3b5d__assembly_1__model_1

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

Download this curve (.dat)

3b5d__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

3b5d__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	17.06 Å
Rg (electron density)	16.42 Å
Total Rg	16.95 Å
Atom count	25
Residues	0
Excluded volume	27874 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`3b5d__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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Unit-cell length a length_a	115.100 Å
Unit-cell length b length_b	43.700 Å
Unit-cell length c length_c	76.400 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	108.10 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	8

Space group space_group	C 1 2 1
Space-group number int_tables_number	5
Crystal system crystal_system	—

Resolution resolution	3.800 Å
Low-resolution limit resolution_low	20.000 Å
R factor r_factor	—
R_work r_work	0.3250
R_free r_free	0.3640

Description description	Multidrug transporter emrE
Molecular weight formula_weight	11963.3 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	224

EmrE multidrug transporter in complex with TPP, C2 crystal form

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

Multidrug transporter emrE

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

3b5d__assembly_1__model_1

3b5d__assembly_1__model_1 | I(q)

3b5d__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 non-polymer

7. Citations (1)

Source organism organism	Escherichia coli K12
NCBI taxonomy ID ncbi_taxonomy_id	83333
Host organism host_organism	Escherichia coli BL21(DE3)

Description description	TETRAPHENYLPHOSPHONIUM
Molecular weight formula_weight	339.4 kDa
Source method src_method	syn
Copy count entity_count	1

EmrE multidrug transporter in complex with TPP, C2 crystal form

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

Multidrug transporter emrE

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

3b5d__assembly_1__model_1

3b5d__assembly_1__model_1 | I(q)

3b5d__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 non-polymer

7. Citations (1)