5k2b

2.5 angstrom A2a adenosine receptor structure with MR phasing using XFEL data

Method: X-RAY DIFFRACTION

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

Adenosine receptor A2a/Soluble cytochrome b562 chimera

Homo sapiens, Escherichia coli

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Insufficient information	Monomer	Protein 1	4-{2-[(7-amino-2-furan-2-yl[1,2,4]triazolo[1,5-a][1,3,5]triazin-5-yl)amino]ethyl}phenol × 1 SODIUM ION × 1 CHOLESTEROL × 3 (2S)-2,3-dihydroxypropyl (9Z)-octadec-9-enoate × 1 (2R)-2,3-dihydroxypropyl (9Z)-octadec-9-enoate × 9 OLEIC ACID × 8 water × 1	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	C562_ECOLX
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 234–339； UniProt 23–128

Adenosine receptor A2a/Soluble cytochrome b562 chimera

Homo sapiens, Escherichia coli

UniProt P29274

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Insufficient information	Monomer	Protein 1	4-{2-[(7-amino-2-furan-2-yl[1,2,4]triazolo[1,5-a][1,3,5]triazin-5-yl)amino]ethyl}phenol × 1 SODIUM ION × 1 CHOLESTEROL × 3 (2S)-2,3-dihydroxypropyl (9Z)-octadec-9-enoate × 1 (2R)-2,3-dihydroxypropyl (9Z)-octadec-9-enoate × 9 OLEIC ACID × 8 water × 1	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	AA2AR_HUMAN
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 27–233； UniProt 2–208 Author chain A； PDBConstruct 340–437； UniProt 219–316

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	5k2b
Deposition date deposition_date	2016-05-18
Structure title title	2.5 angstrom A2a adenosine receptor structure with MR phasing using XFEL data
Keywords keywords	A2a adenosine receptor, membrane protein, GPCR, Structural Genomics, PSI-Biology, GPCR Network; 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.

5k2b__assembly_1__model_1

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

Download this curve (.dat)

5k2b__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

5k2b__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	30.60 Å
Rg (electron density)	29.80 Å
Total Rg	30.23 Å
Atom count	3353
Residues	394
Excluded volume	62334 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`5k2b__assembly_1__model_1`	monomeric （1）	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 (8)

Entity 1 Entity 1 polymer

Description description	Adenosine receptor A2a/Soluble cytochrome b562 chimera
Molecular weight formula_weight	49974.3 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	3484

MKTIIALSYIFCLVFADYKDDDDGAPPIMGSSVYITVELAIAVLAILGNVLVCWAVWLNSNLQNVTNYFVVSLAAADIAVGVLAIPFAITISTGFCAACHGCLFIACFVLVLTQSSIFSLLAIAIDRYIAIRIPLRYNGLVTGTRAKGIIAICWVLSFAIGLTPMLGWNNCGQPKEGKNHSQGCGEGQVACLFEDVVPMNYMVYFNFFACVLVPLLLMLGVYLRIFLAARRQLADLEDNWETLNDNLKVIEKADNAAQVKDALTKMRAAALDAQKATPPKLEDKSPDSPEMKDFRHGFDILVGQIDDALKLANEGKVKEAQAAAEQLKTTRNAYIQKYLERARSTLQKEVHAAKSLAIIVGLFALCWLPLHIINCFTFFCPDCSHAPLWLMYLAIVLSHTNSVVNPFIYAYRIREFRQTFRKIIRSHVLRQQEPFKAHHHHHHHHHH

Source Source

Source organism organism	Homo sapiens, Escherichia coli
Common name common_name	Human
Host organism host_organism	Spodoptera frugiperda

Entity 2 Entity 2 non-polymer

Description description	4-{2-[(7-amino-2-furan-2-yl[1,2,4]triazolo[1,5-a][1,3,5]triazin-5-yl)amino]ethyl}phenol
Molecular weight formula_weight	337.3 kDa
Source method src_method	syn
Copy count entity_count	1

Entity 3 Entity 3 non-polymer

Description description	SODIUM ION
Molecular weight formula_weight	23.0 kDa
Source method src_method	syn
Copy count entity_count	1

Entity 4 Entity 4 non-polymer

Description description	CHOLESTEROL
Molecular weight formula_weight	386.7 kDa
Source method src_method	syn
Copy count entity_count	3

Entity 5 Entity 5 non-polymer

Description description	(2S)-2,3-dihydroxypropyl (9Z)-octadec-9-enoate
Molecular weight formula_weight	356.5 kDa
Source method src_method	syn
Copy count entity_count	1

Entity 6 Entity 6 non-polymer

Description description	(2R)-2,3-dihydroxypropyl (9Z)-octadec-9-enoate
Molecular weight formula_weight	356.5 kDa
Source method src_method	syn
Copy count entity_count	9

Entity 7 Entity 7 non-polymer

Description description	OLEIC ACID
Molecular weight formula_weight	282.5 kDa
Source method src_method	syn
Copy count entity_count	8

Entity 8 Entity 8 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	63

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Unit-cell length a length_a	40.360 Å
Unit-cell length b length_b	180.740 Å
Unit-cell length c length_c	142.800 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	8

Space group space_group	C 2 2 21
Space-group number int_tables_number	20
Crystal system crystal_system	—

Resolution resolution	2.500 Å
Low-resolution limit resolution_low	23.437 Å
R factor r_factor	0.1750
R_work r_work	0.1728
R_free r_free	0.2193

2.5 angstrom A2a adenosine receptor structure with MR phasing using XFEL data

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

Adenosine receptor A2a/Soluble cytochrome b562 chimera

State in the Current Structure

Other States of the Same Protein in the Database

Adenosine receptor A2a/Soluble cytochrome b562 chimera

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

5k2b__assembly_1__model_1

5k2b__assembly_1__model_1 | I(q)

5k2b__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 (8)

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 non-polymer

Entity 6 Entity 6 non-polymer

Entity 7 Entity 7 non-polymer

Entity 8 Entity 8 water

7. Citations (1)

2.5 angstrom A2a adenosine receptor structure with MR phasing using XFEL data

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

Adenosine receptor A2a/Soluble cytochrome b562 chimera

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

Adenosine receptor A2a/Soluble cytochrome b562 chimera

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

5k2b__assembly_1__model_1

5k2b__assembly_1__model_1 | I(q)

5k2b__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 (8)

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 non-polymer

Entity 6 Entity 6 non-polymer

Entity 7 Entity 7 non-polymer

Entity 8 Entity 8 water

7. Citations (1)