8FB9: Light-harvesting protein B800-820 alpha chain

LH2-LH3 antenna in anti parallel configuration embedded in a nanodisc. Determined by electron microscopy at 6.4 Å resolution. Released 19 Jul 2023.

Method: Electron microscopy
Resolution: 6.4 Å
Organism: Magnetospirillum molischianum
Chains: 32
Atoms: 9,816
Mol. weight: 230.54 kDa
Ligands: LYC, BCL
Released: 19 Jul 2023

Explore 8FB9 in 3D Show helices and sheets RCSB PDB PDBe

Secondary structure: helices and β-sheets

8FB9 contains 96 α-helices and 0 β-strands across 32 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, A, c, C, D, e, G, I, K, M, O, Q, S, U, W and Y: 5 helices, 0 β-strands

Element	Residues	Length
α-helix	4-8	5
α-helix	9-12	4
α-helix	15-39	25
α-helix	41-43	3
α-helix	45-55	11

Chains b, B, d, E, f, F, H, J, L, N, P, R, T, V, X and Z: 1 helix, 0 β-strands

Element	Residues	Length	Sheet
α-helix	10-41	32

Molecules and chains

Molecule	Chains	Type	Length	Organism	UniProt
Light-harvesting protein B800-820 alpha chain	A, C, D, G, I, K, c, e	protein	56	Magnetospirillum molischianum	Q7M119 (AlphaFold model)
Light-harvesting protein B800-820 beta chain	B, E, F, H, J, L, d, f	protein	45	Magnetospirillum molischianum	Q7M158 (AlphaFold model)
Light-harvesting protein B-800/850 alpha chain	M, O, Q, S, U, W, Y, a	protein	56	Magnetospirillum molischianum	P97253 (AlphaFold model)
Light-harvesting protein B-800/850 beta 1 chain	N, P, R, T, V, X, Z, b	protein	45	Magnetospirillum molischianum	P95673 (AlphaFold model)

Sequence of entity 1 (A, C, D, G, I, K, c, e), FASTA

>8FB9_1 Light-harvesting protein B800-820 alpha chain (chains A, C, D, G, I, K, c, e)
SNPKDDYKIWLVINPSTWLPVIWIVALLTAIAVHSFVLSVPGYNFLASAAAKTAAK

Sequence of entity 2 (B, E, F, H, J, L, d, f), FASTA

>8FB9_2 Light-harvesting protein B800-820 beta chain (chains B, E, F, H, J, L, d, f)
AERSLSGLTEEEAVAVHDQFKTTFSAFILLAAVAHVLVWIWKPWF

Sequence of entity 3 (M, O, Q, S, U, W, Y, a), FASTA

>8FB9_3 Light-harvesting protein B-800/850 alpha chain (chains M, O, Q, S, U, W, Y, a)
SNPKDDYKIWLVINPSTWLPVIWIVATVVAIAVHAAVLAAPGFNWIALGAAKSAAK

Sequence of entity 4 (N, P, R, T, V, X, Z, b), FASTA

>8FB9_4 Light-harvesting protein B-800/850 beta 1 chain (chains N, P, R, T, V, X, Z, b)
AERSLSGLTEEEAIAVHDQFKTTFSAFIILAAVAHVLVWVWKPWF

Ligands and cofactors

ID	Name	Formula	Copies
LYC	Lycopene	C40 H56	16
BCL	Bacteriochlorophyll a	C55 H74 Mg N4 O6	48

Primary citation

Elucidating interprotein energy transfer dynamics within the antenna network from purple bacteria. Wang, D., Fiebig, O.C., Harris, D. et al. Proc Natl Acad Sci U S A (2023) 120:e2220477120-e2220477120. DOI 10.1073/pnas.2220477120 · PubMed

Other PDB entries of the same protein (UniProt Q7M119 (AlphaFold model), which also has an AlphaFold model), best resolution first:

7TUW 8.2 Å, LH2-LH3 antenna in anti parallel configuration embedded in a nanodisc
8FBB 11.3 Å, LH2-LH3 antenna in parallel configuration embedded in a nanodisc
7TV3 11.4 Å, LH2-LH3 antenna in parallel configuration embedded in a nanodisc

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