7TUW: Light-harvesting protein B800-820 alpha chain

LH2-LH3 antenna in anti parallel configuration embedded in a nanodisc. Determined by electron microscopy at 8.2 Å resolution. Released 15 Feb 2023.

Method: Electron microscopy
Resolution: 8.2 Å
Organism: Magnetospirillum molischianum
Chains: 32
Atoms: 9,816
Mol. weight: 234.74 kDa
Ligands: BCL, LYC
Released: 15 Feb 2023

Explore 7TUW in 3D Show helices and sheets RCSB PDB PDBe

Secondary structure: helices and β-sheets

7TUW 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	57	Magnetospirillum molischianum	Q7M119 (AlphaFold model)
Light-harvesting protein B800-820 beta chain	B, E, F, H, J, L, d, f	protein	46	Magnetospirillum molischianum	Q7M158 (AlphaFold model)
Light-harvesting protein B-800/850 alpha chain	M, O, Q, S, U, W, Y, a	protein	57	Magnetospirillum molischianum	P97253 (AlphaFold model)
Light-harvesting protein B-800/850 beta 1 chain	N, P, R, T, V, X, Z, b	protein	46	Magnetospirillum molischianum	P95673 (AlphaFold model)

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

>7TUW_1 Light-harvesting protein B800-820 alpha chain (chains A, C, D, G, I, K, c, e)
MSNPKDDYKIWLVINPSTWLPVIWIVALLTAIAVHSFVLSVPGYNFLASAAAKTAAK

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

>7TUW_2 Light-harvesting protein B800-820 beta chain (chains B, E, F, H, J, L, d, f)
MAERSLSGLTEEEAVAVHDQFKTTFSAFILLAAVAHVLVWIWKPWF

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

>7TUW_3 Light-harvesting protein B-800/850 alpha chain (chains M, O, Q, S, U, W, Y, a)
MSNPKDDYKIWLVINPSTWLPVIWIVATVVAIAVHAAVLAAPGFNWIALGAAKSAAK

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

>7TUW_4 Light-harvesting protein B-800/850 beta 1 chain (chains N, P, R, T, V, X, Z, b)
MAERSLSGLTEEEAIAVHDQFKTTFSAFIILAAVAHVLVWVWKPWF

Ligands and cofactors

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

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:

8FB9 6.4 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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