2NTW: Bacteriorhodopsin

Bacteriorhodopsin, wild type, after illumination to produce the L intermediate. Determined by X-ray diffraction at 1.53 Å resolution. Released 26 Dec 2006.

Method: X-ray diffraction
Resolution: 1.53 Å
Organism: Halobacterium salinarum
Chains: 1
Atoms: 1,763
Mol. weight: 27.21 kDa
Ligands: RET
Released: 26 Dec 2006

Explore 2NTW in 3D Show helices and sheets RCSB PDB PDBe

Secondary structure: helices and β-sheets

2NTW contains 10 α-helices and 2 β-strands across 1 chain. 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.

Chain A: 10 helices, 2 β-strands

Element	Residues	Length	Sheet
α-helix	10-30	21
α-helix	37-61	25
β-strand	67-71	5	1
β-strand	74-78	5	1
α-helix	81-100	20
α-helix	105-127	23
α-helix	131-154	24
α-helix	165-191	27
α-helix	201-213	13
α-helix	214-218	5
α-helix	219-225	7
α-helix	227-229	3

Molecules and chains

Molecule	Chains	Type	Length	Organism	UniProt
Bacteriorhodopsin	A	protein	249	Halobacterium salinarum	P02945 (AlphaFold model)

Sequence of entity 1 (A), FASTA

>2NTW_1 Bacteriorhodopsin (chains A)
QAQITGRPEWIWLALGTALMGLGTLYFLVKGMGVSDPDAKKFYAITTLVPAIAFTMYLSM
LLGYGLTMVPFGGEQNPIYWARYADWLFTTPLLLLDLALLVDADQGTILALVGADGIMIG
TGLVGALTKVYSYRFVWWAISTAAMLYILYVLFFGFTSKAESMRPEVASTFKVLRNVTVV
LWSAYPVVWLIGSEGAGIVPLNIETLLFMVLDVSAKVGFGLILLRSRAIFGEAEAPEPSA
GDGAAATSD

Ligands and cofactors

ID	Name	Formula	Copies
RET	Retinal	C20 H28 O	1

Primary citation

Structural changes in the L photointermediate of bacteriorhodopsin. Lanyi, J.K., Schobert, B. J Mol Biol (2007) 365:1379-1392. DOI 10.1016/j.jmb.2006.11.016 · PubMed

Other PDB entries of the same protein (UniProt P02945 (AlphaFold model), which also has an AlphaFold model), best resolution first:

7Z09 1.05 Å, Crystal structure of the ground state of bacteriorhodopsin at 1.05 Angstrom resolution
7Z0D 1.2 Å, Crystal structure of the L state of bacteriorhodopsin at 1.20 Angstrom resolution
7Z0A 1.22 Å, Crystal structure of the ground state of bacteriorhodopsin at 1.22 Angstrom resolution
7Z0E 1.22 Å, Crystal structure of the M state of bacteriorhodopsin at 1.22 Angstrom resolution
5ZIM 1.25 Å, Crystal structure of bacteriorhodopsin at 1.25 A resolution
5ZIN 1.27 Å, Crystal structure of bacteriorhodopsin at 1.27 A resolution
5ZIL 1.29 Å, Crystal structure of bacteriorhodopsin at 1.29 A resolution
7XJC 1.33 Å, Crystal structure of bacteriorhodopsin in the ground and K states after green laser…
7XJD 1.33 Å, Crystal structure of bacteriorhodopsin in the ground state by red laser irradiation
7XJE 1.33 Å, Crystal structure of bacteriorhodopsin in the K state refined against the extrapolated…
1M0K 1.43 Å, Bacteriorhodopsin K intermediate at 1.43 a resolution
1M0M 1.43 Å, Bacteriorhodopsin M1 intermediate at 1.43 a resolution

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