1NKZ: LH2 B800-850 from Rps. acidophila

Crystal structure of LH2 B800-850 from Rps. acidophila at 2.0 Angstrom resolution. Determined by X-ray diffraction at 2.0 Å resolution. Released 25 Feb 2003.

Method: X-ray diffraction
Resolution: 2.0 Å
Organism: Rhodoblastus acidophilus
Chains: 6
Atoms: 3,461
Mol. weight: 45.39 kDa
Ligands: BEN, BCL, BOG, RG1
Released: 25 Feb 2003

Explore 1NKZ in 3D Show helices and sheets RCSB PDB PDBe

Secondary structure: helices and β-sheets

1NKZ contains 12 α-helices and 0 β-strands across 6 chains. Residue ranges use author residue numbering, as in the PDB file, from PDBe. To see them in 3D, choose the Cartoon representation with Secondary structure coloring: helices, sheets and coils get different colors.

Chains A, C and E: 3 helices, 0 β-strands

Element	Residues	Length
α-helix	6-8	3
α-helix	12-37	26
α-helix	40-46	7

Chains B, D and F: 1 helix, 0 β-strands

Element	Residues	Length	Sheet
α-helix	5-36	32

Molecules and chains

Molecule	Chains	Type	Length	Organism	UniProt
Light-harvesting protein B-800/850, alpha chain	A, C, E	protein	53	Rhodoblastus acidophilus	P26789 (AlphaFold model)
Light-harvesting protein B-800/850, beta chain	B, D, F	protein	41	Rhodoblastus acidophilus	P26790 (AlphaFold model)

Sequence of entity 1 (A, C, E), FASTA

>1NKZ_1 Light-harvesting protein B-800/850, alpha chain (chains A, C, E)
MNQGKIWTVVNPAIGIPALLGSVTVIAILVHLAILSHTTWFPAYWQGGVKKAA

Sequence of entity 2 (B, D, F), FASTA

>1NKZ_2 Light-harvesting protein B-800/850, beta chain (chains B, D, F)
ATLTAEQSEELHKYVIDGTRVFLGLALVAHFLAFSATPWLH

Ligands and cofactors

ID	Name	Formula	Copies
BEN	Benzamidine	C7 H8 N2	3
BCL	Bacteriochlorophyll a	C55 H74 Mg N4 O6	9
BOG	octyl beta-D-glucopyranoside	C14 H28 O6	6
RG1	Rhodopin b-D-glucoside	C46 H66 O6	6

Primary citation

The structure and thermal motion of the B800-850 LH2 complex from Rps. acidophila at 2.0 A resolution and 100K : new structural features and functionally relevant motions. Papiz, M.Z., Prince, S.M., Howard, T. et al. J Mol Biol (2003) 326:1523-1538. DOI 10.1016/S0022-2836(03)00024-X · PubMed

Other PDB entries of the same protein (UniProt P26789 (AlphaFold model), which also has an AlphaFold model), best resolution first:

9EK8 2.35 Å, Light Harvesting complex 2 (LH2), B800-B850, of Rhodoblastus (Rbl.) acidophilus strain…
2FKW 2.45 Å, Structure of LH2 from Rps. acidophila crystallized in lipidic mesophases
1KZU 2.5 Å, Integral membrane peripheral light harvesting complex from rhodopseudomonas acidophila…

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