2fkw

Structure of LH2 from Rps. acidophila crystallized in lipidic mesophases

Method: X-RAY DIFFRACTION

▼

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

Light-harvesting protein B-800/850, alpha chain

OrganismNot specified

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 18	Light-harvesting protein B-800/850, beta chain × 9 （P26790） BACTERIOCHLOROPHYLL A × 27 LAURYL DIMETHYLAMINE-N-OXIDE × 27 Rhodopin b-D-glucoside × 9 water × 18	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	LHA4_RHOAC
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–53； UniProt 1–53 Author chain C； PDBConstruct 1–53； UniProt 1–53 Author chain E； PDBConstruct 1–53； UniProt 1–53 Author chain G； PDBConstruct 1–53； UniProt 1–53 Author chain I； PDBConstruct 1–53； UniProt 1–53 Author chain K； PDBConstruct 1–53； UniProt 1–53 Author chain M； PDBConstruct 1–53； UniProt 1–53 Author chain O； PDBConstruct 1–53； UniProt 1–53 Author chain R； PDBConstruct 1–53； UniProt 1–53

Light-harvesting protein B-800/850, beta chain

OrganismNot specified

UniProt P26790

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 18	Light-harvesting protein B-800/850, alpha chain × 9 （P26789） BACTERIOCHLOROPHYLL A × 27 LAURYL DIMETHYLAMINE-N-OXIDE × 27 Rhodopin b-D-glucoside × 9 water × 18	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	LHB5_RHOAC
Isoform	—
PDB entities	2
Chains and sequence ranges	Author chain B； PDBConstruct 1–41； UniProt 1–41 Author chain D； PDBConstruct 1–41； UniProt 1–41 Author chain F； PDBConstruct 1–41； UniProt 1–41 Author chain H； PDBConstruct 1–41； UniProt 1–41 Author chain J； PDBConstruct 1–41； UniProt 1–41 Author chain L； PDBConstruct 1–41； UniProt 1–41 Author chain N； PDBConstruct 1–41； UniProt 1–41 Author chain P； PDBConstruct 1–41； UniProt 1–41 Author chain S； PDBConstruct 1–41； UniProt 1–41

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.

▼

2. Structure Basics 2. Structure Basics

Entry ID entry_id	2fkw
Deposition date deposition_date	2006-01-05
Structure title title	Structure of LH2 from Rps. acidophila crystallized in lipidic mesophases
Keywords keywords	;Light Harvesting Complex B800-B850, Lipidic Mesophase, crystallization, cubic phase, sponge phase, LDAO, rhodopin glucoside carotenoid, MEMBRANE PROTEIN, PHOTOSYNTHESIS ;; MEMBRANE PROTEIN, PHOTOSYNTHESIS
Experimental Method method	X-RAY DIFFRACTION

▼

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.

2fkw__assembly_1__model_1

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

Download this curve (.dat)

2fkw__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

2fkw__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	33.31 Å
Rg (electron density)	30.71 Å
Total Rg	31.90 Å
Atom count	9216
Residues	837
Excluded volume	177170 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`2fkw__assembly_1__model_1`	octadecameric （18）	Success	4.1.3-1-20251215 (887e7ef)	View Download

▶

4. Crystallography and Experiment 4. Crystallography & Experiment

▶

5. Entities and Polymers Entities & Polymers (6)

Entity 1 Entity 1 polymer

Description description	Light-harvesting protein B-800/850, alpha chain
Molecular weight formula_weight	5702.7 kDa
Source method src_method	nat
Copy count entity_count	9

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,C,E,G,I,K,M,O,R
Atom count atom_count	9829

MNQGKIWTVVNPAIGIPALLGSVTVIAILVHLAILSHTTWFPAYWQGGVKKAA

Entity 2 Entity 2 polymer

Description description	Light-harvesting protein B-800/850, beta chain
Molecular weight formula_weight	4559.2 kDa
Source method src_method	nat
Copy count entity_count	9

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	B,D,F,H,J,L,N,P,S

ATLTAEQSEELHKYVIDGTRVFLGLALVAHFLAFSATPWLH

Entity 3 Entity 3 non-polymer

Description description	BACTERIOCHLOROPHYLL A
Molecular weight formula_weight	911.5 kDa
Source method src_method	syn
Copy count entity_count	27

Entity 4 Entity 4 non-polymer

Description description	LAURYL DIMETHYLAMINE-N-OXIDE
Molecular weight formula_weight	229.4 kDa
Source method src_method	syn
Copy count entity_count	27

Entity 5 Entity 5 non-polymer

Description description	Rhodopin b-D-glucoside
Molecular weight formula_weight	715.0 kDa
Source method src_method	syn
Copy count entity_count	9

Entity 6 Entity 6 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	613

▼

6. Fold Classification (SCOP + CATH) 36 domains

SCOP 2.08 (18 domains)

Domain ID domain_id	d2fkwa_
Class class	f — Membrane and cell surface proteins and peptides
Fold Fold fold	f.3 — Light-harvesting complex subunits
Superfamily Superfamily superfamily	f.3.1 — Light-harvesting complex subunits
Family Family family	f.3.1.1 — Light-harvesting complex subunits

Domain ID domain_id	d2fkwb_
Class class	f — Membrane and cell surface proteins and peptides
Fold Fold fold	f.3 — Light-harvesting complex subunits
Superfamily Superfamily superfamily	f.3.1 — Light-harvesting complex subunits
Family Family family	f.3.1.1 — Light-harvesting complex subunits

Domain ID domain_id	d2fkwc_
Class class	f — Membrane and cell surface proteins and peptides
Fold Fold fold	f.3 — Light-harvesting complex subunits
Superfamily Superfamily superfamily	f.3.1 — Light-harvesting complex subunits
Family Family family	f.3.1.1 — Light-harvesting complex subunits

Domain ID domain_id	d2fkwd_
Class class	f — Membrane and cell surface proteins and peptides
Fold Fold fold	f.3 — Light-harvesting complex subunits
Superfamily Superfamily superfamily	f.3.1 — Light-harvesting complex subunits
Family Family family	f.3.1.1 — Light-harvesting complex subunits

Domain ID domain_id	d2fkwe_
Class class	f — Membrane and cell surface proteins and peptides
Fold Fold fold	f.3 — Light-harvesting complex subunits
Superfamily Superfamily superfamily	f.3.1 — Light-harvesting complex subunits
Family Family family	f.3.1.1 — Light-harvesting complex subunits

Domain ID domain_id	d2fkwf_
Class class	f — Membrane and cell surface proteins and peptides
Fold Fold fold	f.3 — Light-harvesting complex subunits
Superfamily Superfamily superfamily	f.3.1 — Light-harvesting complex subunits
Family Family family	f.3.1.1 — Light-harvesting complex subunits

Domain ID domain_id	d2fkwg_
Class class	f — Membrane and cell surface proteins and peptides
Fold Fold fold	f.3 — Light-harvesting complex subunits
Superfamily Superfamily superfamily	f.3.1 — Light-harvesting complex subunits
Family Family family	f.3.1.1 — Light-harvesting complex subunits

Domain ID domain_id	d2fkwh_
Class class	f — Membrane and cell surface proteins and peptides
Fold Fold fold	f.3 — Light-harvesting complex subunits
Superfamily Superfamily superfamily	f.3.1 — Light-harvesting complex subunits
Family Family family	f.3.1.1 — Light-harvesting complex subunits

Domain ID domain_id	d2fkwi_
Class class	f — Membrane and cell surface proteins and peptides
Fold Fold fold	f.3 — Light-harvesting complex subunits
Superfamily Superfamily superfamily	f.3.1 — Light-harvesting complex subunits
Family Family family	f.3.1.1 — Light-harvesting complex subunits

Domain ID domain_id	d2fkwj_
Class class	f — Membrane and cell surface proteins and peptides
Fold Fold fold	f.3 — Light-harvesting complex subunits
Superfamily Superfamily superfamily	f.3.1 — Light-harvesting complex subunits
Family Family family	f.3.1.1 — Light-harvesting complex subunits

Domain ID domain_id	d2fkwk_
Class class	f — Membrane and cell surface proteins and peptides
Fold Fold fold	f.3 — Light-harvesting complex subunits
Superfamily Superfamily superfamily	f.3.1 — Light-harvesting complex subunits
Family Family family	f.3.1.1 — Light-harvesting complex subunits

Domain ID domain_id	d2fkwl_
Class class	f — Membrane and cell surface proteins and peptides
Fold Fold fold	f.3 — Light-harvesting complex subunits
Superfamily Superfamily superfamily	f.3.1 — Light-harvesting complex subunits
Family Family family	f.3.1.1 — Light-harvesting complex subunits

Domain ID domain_id	d2fkwm_
Class class	f — Membrane and cell surface proteins and peptides
Fold Fold fold	f.3 — Light-harvesting complex subunits
Superfamily Superfamily superfamily	f.3.1 — Light-harvesting complex subunits
Family Family family	f.3.1.1 — Light-harvesting complex subunits

Domain ID domain_id	d2fkwn_
Class class	f — Membrane and cell surface proteins and peptides
Fold Fold fold	f.3 — Light-harvesting complex subunits
Superfamily Superfamily superfamily	f.3.1 — Light-harvesting complex subunits
Family Family family	f.3.1.1 — Light-harvesting complex subunits

Domain ID domain_id	d2fkwo_
Class class	f — Membrane and cell surface proteins and peptides
Fold Fold fold	f.3 — Light-harvesting complex subunits
Superfamily Superfamily superfamily	f.3.1 — Light-harvesting complex subunits
Family Family family	f.3.1.1 — Light-harvesting complex subunits

Domain ID domain_id	d2fkwp_
Class class	f — Membrane and cell surface proteins and peptides
Fold Fold fold	f.3 — Light-harvesting complex subunits
Superfamily Superfamily superfamily	f.3.1 — Light-harvesting complex subunits
Family Family family	f.3.1.1 — Light-harvesting complex subunits

Domain ID domain_id	d2fkwr_
Class class	f — Membrane and cell surface proteins and peptides
Fold Fold fold	f.3 — Light-harvesting complex subunits
Superfamily Superfamily superfamily	f.3.1 — Light-harvesting complex subunits
Family Family family	f.3.1.1 — Light-harvesting complex subunits

Domain ID domain_id	d2fkws_
Class class	f — Membrane and cell surface proteins and peptides
Fold Fold fold	f.3 — Light-harvesting complex subunits
Superfamily Superfamily superfamily	f.3.1 — Light-harvesting complex subunits
Family Family family	f.3.1.1 — Light-harvesting complex subunits

CATH v4.4 (18 domains)

Domain ID domain_id	2fkwA00
Class class	4 — Few Secondary Structures
Architecture architecture	10 — Irregular
Topology topology	220 — Light-harvesting Protein
Homologous superfamily homologous superfamily	20 — Light-harvesting complex

Domain ID domain_id	2fkwB00
Class class	1 — Mainly Alpha
Architecture architecture	20 — Up-down Bundle
Topology topology	5 — Single alpha-helices involved in coiled-coils or other helix-helix interfaces
Homologous superfamily homologous superfamily	250 —

Domain ID domain_id	2fkwC00
Class class	4 — Few Secondary Structures
Architecture architecture	10 — Irregular
Topology topology	220 — Light-harvesting Protein
Homologous superfamily homologous superfamily	20 — Light-harvesting complex

Domain ID domain_id	2fkwD00
Class class	1 — Mainly Alpha
Architecture architecture	20 — Up-down Bundle
Topology topology	5 — Single alpha-helices involved in coiled-coils or other helix-helix interfaces
Homologous superfamily homologous superfamily	250 —

Domain ID domain_id	2fkwE00
Class class	4 — Few Secondary Structures
Architecture architecture	10 — Irregular
Topology topology	220 — Light-harvesting Protein
Homologous superfamily homologous superfamily	20 — Light-harvesting complex

Domain ID domain_id	2fkwF00
Class class	1 — Mainly Alpha
Architecture architecture	20 — Up-down Bundle
Topology topology	5 — Single alpha-helices involved in coiled-coils or other helix-helix interfaces
Homologous superfamily homologous superfamily	250 —

Domain ID domain_id	2fkwG00
Class class	4 — Few Secondary Structures
Architecture architecture	10 — Irregular
Topology topology	220 — Light-harvesting Protein
Homologous superfamily homologous superfamily	20 — Light-harvesting complex

Domain ID domain_id	2fkwH00
Class class	1 — Mainly Alpha
Architecture architecture	20 — Up-down Bundle
Topology topology	5 — Single alpha-helices involved in coiled-coils or other helix-helix interfaces
Homologous superfamily homologous superfamily	250 —

Domain ID domain_id	2fkwI00
Class class	4 — Few Secondary Structures
Architecture architecture	10 — Irregular
Topology topology	220 — Light-harvesting Protein
Homologous superfamily homologous superfamily	20 — Light-harvesting complex

Domain ID domain_id	2fkwJ00
Class class	1 — Mainly Alpha
Architecture architecture	20 — Up-down Bundle
Topology topology	5 — Single alpha-helices involved in coiled-coils or other helix-helix interfaces
Homologous superfamily homologous superfamily	250 —

Domain ID domain_id	2fkwK00
Class class	4 — Few Secondary Structures
Architecture architecture	10 — Irregular
Topology topology	220 — Light-harvesting Protein
Homologous superfamily homologous superfamily	20 — Light-harvesting complex

Domain ID domain_id	2fkwL00
Class class	1 — Mainly Alpha
Architecture architecture	20 — Up-down Bundle
Topology topology	5 — Single alpha-helices involved in coiled-coils or other helix-helix interfaces
Homologous superfamily homologous superfamily	250 —

Domain ID domain_id	2fkwM00
Class class	4 — Few Secondary Structures
Architecture architecture	10 — Irregular
Topology topology	220 — Light-harvesting Protein
Homologous superfamily homologous superfamily	20 — Light-harvesting complex

Domain ID domain_id	2fkwN00
Class class	1 — Mainly Alpha
Architecture architecture	20 — Up-down Bundle
Topology topology	5 — Single alpha-helices involved in coiled-coils or other helix-helix interfaces
Homologous superfamily homologous superfamily	250 —

Domain ID domain_id	2fkwO00
Class class	4 — Few Secondary Structures
Architecture architecture	10 — Irregular
Topology topology	220 — Light-harvesting Protein
Homologous superfamily homologous superfamily	20 — Light-harvesting complex

Domain ID domain_id	2fkwP00
Class class	1 — Mainly Alpha
Architecture architecture	20 — Up-down Bundle
Topology topology	5 — Single alpha-helices involved in coiled-coils or other helix-helix interfaces
Homologous superfamily homologous superfamily	250 —

Domain ID domain_id	2fkwR00
Class class	4 — Few Secondary Structures
Architecture architecture	10 — Irregular
Topology topology	220 — Light-harvesting Protein
Homologous superfamily homologous superfamily	20 — Light-harvesting complex

Domain ID domain_id	2fkwS00
Class class	1 — Mainly Alpha
Architecture architecture	20 — Up-down Bundle
Topology topology	5 — Single alpha-helices involved in coiled-coils or other helix-helix interfaces
Homologous superfamily homologous superfamily	250 —

▶

Unit-cell length a length_a	81.443 Å
Unit-cell length b length_b	126.384 Å
Unit-cell length c length_c	129.705 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	36

Space group space_group	P 21 21 21
Space-group number int_tables_number	19
Crystal system crystal_system	—

Resolution resolution	2.450 Å
Low-resolution limit resolution_low	10.000 Å
R factor r_factor	0.1865
R_work r_work	0.1828
R_free r_free	0.2537

Structure of LH2 from Rps. acidophila crystallized in lipidic mesophases

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

Light-harvesting protein B-800/850, alpha chain

State in the Current Structure

Other States of the Same Protein in the Database

Light-harvesting protein B-800/850, beta chain

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

2fkw__assembly_1__model_1

2fkw__assembly_1__model_1 | I(q)

2fkw__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 (6)

Entity 1 Entity 1 polymer

Polymer Polymer

Entity 2 Entity 2 polymer

Polymer Polymer

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 non-polymer

Entity 5 Entity 5 non-polymer

Entity 6 Entity 6 water

6. Fold Classification (SCOP + CATH) 36 domains

SCOP 2.08 (18 domains)

CATH v4.4 (18 domains)

7. Citations (1)

Structure of LH2 from Rps. acidophila crystallized in lipidic mesophases

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

Light-harvesting protein B-800/850, alpha chain

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

Light-harvesting protein B-800/850, beta chain

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

2fkw__assembly_1__model_1

2fkw__assembly_1__model_1 | I(q)

2fkw__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 (6)

Entity 1 Entity 1 polymer

Polymer Polymer

Entity 2 Entity 2 polymer

Polymer Polymer

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 non-polymer

Entity 5 Entity 5 non-polymer

Entity 6 Entity 6 water

6. Fold Classification (SCOP + CATH) 36 domains

SCOP 2.08 (18 domains)

CATH v4.4 (18 domains)

7. Citations (1)