1KZU: Light harvesting protein B-800/850

Integral membrane peripheral light harvesting complex from rhodopseudomonas acidophila strain 10050. Determined by X-ray diffraction at 2.5 Å resolution. Released 1 Apr 1997.

Method: X-ray diffraction
Resolution: 2.5 Å
Organism: Rhodoblastus acidophilus
Chains: 6
Atoms: 2,961
Mol. weight: 43.23 kDa
Ligands: RG1, BCL
Released: 1 Apr 1997

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

Secondary structure: helices and β-sheets

1KZU 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, D and G: 3 helices, 0 β-strands

Element	Residues	Length
α-helix	4-8	5
α-helix	12-36	25
α-helix	40-46	7

Chains B, E and H: 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	A, D, G	protein	53	Rhodoblastus acidophilus	P26789 (AlphaFold model)
Light harvesting protein B-800/850	B, E, H	protein	41	Rhodoblastus acidophilus	P26790 (AlphaFold model)

Sequence of entity 1 (A, D, G), FASTA

>1KZU_1 LIGHT HARVESTING PROTEIN B-800/850 (chains A, D, G)
MNQGKIWTVVNPAIGIPALLGSVTVIAILVHLAILSHTTWFPAYWQGGVKKAA

Sequence of entity 2 (B, E, H), FASTA

>1KZU_2 LIGHT HARVESTING PROTEIN B-800/850 (chains B, E, H)
ATLTAEQSEELHKYVIDGTRVFLGLALVAHFLAFSATPWLH

Ligands and cofactors

ID	Name	Formula	Copies
RG1	Rhodopin b-D-glucoside	C46 H66 O6	6
BCL	Bacteriochlorophyll a	C55 H74 Mg N4 O6	9

Primary citation

Apoprotein structure in the LH2 complex from Rhodopseudomonas acidophila strain 10050: modular assembly and protein pigment interactions. Prince, S.M., Papiz, M.Z., Freer, A.A. et al. J Mol Biol (1997) 268:412-423. DOI 10.1006/jmbi.1997.0966 · PubMed

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

1NKZ 2.0 Å, Crystal structure of LH2 B800-850 from Rps. acidophila at 2.0 Angstrom resolution
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

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1KZU is part of these collections:

Photosynthesis

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