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X - Possible homology level

H - Homology level

T - Topology level

F - Family level

* - Provisional representative


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Evolutionary classification of protein domain structures

alpha arraysalpha-helix arrays with mainly perpendicular helices

alpha bundlesalpha-helix bundles with mainly parallel helices

X: Family A G protein-coupled receptor-like
H: Family A G protein-coupled receptor-like
T: Family A G protein-coupled receptor-like
F: Bac_rhodopsin

PF01036 CL0192

Representatives:

e1m0kA1[A:5-231] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BACTERIORHODOPSIN ; ligands: LI1,RET,SQU ; X-RAY DIFFRACTION 1.43Å

e8jh0B1[B:6-270] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

; ligands: RET ; X-RAY DIFFRACTION 2.79Å

e8jh0A1[A:8-269] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

; ligands: RET ; X-RAY DIFFRACTION 2.79Å

e8iu0A1[A:6-260] Image Pymol Jmol Links: PDB, SCOP, CATHDOI

; ligands: PLM,PSC,RET ; ELECTRON MICROSCOPY

e1jv7A1[A:9-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Bacteriorhodopsin ; ligands: LI1,RET ; X-RAY DIFFRACTION 2.20Å

e1uazB1[B:11-236] Image Pymol Jmol Links: PDB, SCOP, CATH

ARCHAERHODOPSIN-1 ; ligands: RET ; X-RAY DIFFRACTION 3.4Å

e2ntwA1[A:8-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BACTERIORHODOPSIN ; ligands: RET ; X-RAY DIFFRACTION 1.53Å

e1vjmA1[A:5-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BACTERIORHODOPSIN ; ligands: RET ; X-RAY DIFFRACTION 2.3Å

e1q5jA1[A:5-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Bacteriorhodopsin ; ligands: RET ; X-RAY DIFFRACTION 2.1Å

e1pxsB1[B:5-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Bacteriorhodopsin ; ligands: RET ; X-RAY DIFFRACTION 2.2Å

e1tn0A1[A:5-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Bacteriorhodopsin ; ligands: RET ; X-RAY DIFFRACTION 2.5Å

e1r84A1[A:5-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Bacteriorhodopsin ; ligands: RET ; SOLUTION NMR

e1jv6A1[A:9-230] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Bacteriorhodopsin ; ligands: LI1,RET ; X-RAY DIFFRACTION 2.0Å

e1f4zA1[A:5-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BACTERIORHODOPSIN ; ligands: LI1,RET,SQU ; X-RAY DIFFRACTION 1.80Å

e1x0i11[1:8-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Bacteriorhodopsin ; ligands: L2P,L3P,RET,SO4 ; X-RAY DIFFRACTION 2.30Å

e1qkoA1[A:5-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BACTERIORHODOPSIN ; ligands: RET ; X-RAY DIFFRACTION 2.100Å

e1s53B1[B:5-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

bacteriorhodopsin ; ligands: RET ; X-RAY DIFFRACTION 2.00Å

e1cwqB1[B:5-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BACTERIORHODOPSIN ("M" STATE INTERMEDIATE IN COMBINATION WITH GROUND STATE) ; ligands: HEX,OCT,RET,TRD,UND ; X-RAY DIFFRACTION 2.25Å

e1s54A1[A:5-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

bacteriorhodopsin ; ligands: RET ; X-RAY DIFFRACTION 2.20Å

e1pxrA1[A:6-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Bacteriorhodopsin ; ligands: RET ; X-RAY DIFFRACTION 1.65Å

e1kmeA1[A:5-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BACTERIORHODOPSIN ; ligands: BGC,RET,SQU ; X-RAY DIFFRACTION 2.0Å

e1py6A1[A:5-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BACTERIORHODOPSIN ; ligands: RET ; X-RAY DIFFRACTION 1.8Å

e1l0mA1[A:7-218] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed,

Bacteriorhodopsin ; SOLUTION NMR

e1tn5A1[A:5-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Bacteriorhodopsin ; ligands: RET ; X-RAY DIFFRACTION 2.1Å

e1ap9A1[A:7-225] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BACTERIORHODOPSIN ; ligands: RET ; X-RAY DIFFRACTION 2.35Å

e1iw6A1[A:5-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

bacteriorhodopsin ; ligands: L2P,L3P,RET ; X-RAY DIFFRACTION 2.30Å

e1brdA1[A:8-226] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BACTERIORHODOPSIN PRECURSOR ; ligands: RET ; ELECTRON CRYSTALLOGRAPHY

e1p8iA1[A:5-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Bacteriorhodopsin ; ligands: LI1,RET,SQU ; X-RAY DIFFRACTION 1.860Å

e1cwqA1[A:5-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BACTERIORHODOPSIN ("M" STATE INTERMEDIATE IN COMBINATION WITH GROUND STATE) ; ligands: HEX,OCT,RET,TRD,UND ; X-RAY DIFFRACTION 2.25Å

e1c8sA1[A:5-222] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BACTERIORHODOPSIN ("M" STATE INTERMEDIATE) ; ligands: LI1,RET,SQU ; X-RAY DIFFRACTION 2.000Å

e1tn0B1[B:5-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Bacteriorhodopsin ; ligands: RET ; X-RAY DIFFRACTION 2.5Å

e1x0k11[1:8-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BACTERIORHODOPSIN ; ligands: L2P,L3P,RET ; X-RAY DIFFRACTION 2.6Å

e1dzeA1[A:6-230] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BACTERIORHODOPSIN (M INTERMEDIATE) ; ligands: L1P,L2P,L3P,L4P,RET ; X-RAY DIFFRACTION 2.500Å

e1p8hA1[A:5-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BACTERIORHODOPSIN ; ligands: LI1,RET,SQU ; X-RAY DIFFRACTION 1.52Å

e1ucqA1[A:5-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BACTERIORHODOPSIN ; ligands: L2P,L3P,RET ; X-RAY DIFFRACTION 2.4Å

e2ntuA1[A:8-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BACTERIORHODOPSIN ; ligands: RET ; X-RAY DIFFRACTION 1.53Å

e1tn5B1[B:5-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Bacteriorhodopsin ; ligands: RET ; X-RAY DIFFRACTION 2.1Å

e1pxrB1[B:6-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Bacteriorhodopsin ; ligands: RET ; X-RAY DIFFRACTION 1.65Å

e1qm8A1[A:5-230] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BACTERIORHODOPSIN ; ligands: L1P,L2P,L3P,L4P,RET ; X-RAY DIFFRACTION 2.500Å

e1x0sA1[A:8-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Bacteriorhodopsin ; ligands: L2P,L3P,RET,SO4 ; X-RAY DIFFRACTION 2.50Å

e1s52B1[B:5-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

bacteriorhodopsin ; ligands: RET ; X-RAY DIFFRACTION 2.28Å

e1brrA1[A:5-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEIN (BACTERIORHODOPSIN) ; ligands: ARC,GOL,RET ; X-RAY DIFFRACTION 2.9Å

e2brdA1[A:7-228] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BACTERIORHODOPSIN ; ligands: DPG,RET ; ELECTRON CRYSTALLOGRAPHY 3.5Å

e1s51B1[B:5-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

bacteriorhodopsin ; ligands: RET ; X-RAY DIFFRACTION 2.0Å

e1at9A1[A:5-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BACTERIORHODOPSIN ; ligands: RET ; ELECTRON CRYSTALLOGRAPHY 3.0Å

e1q5jB1[B:5-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Bacteriorhodopsin ; ligands: RET ; X-RAY DIFFRACTION 2.1Å

e1r2nA1[A:5-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Bacteriorhodopsin ; ligands: RET ; SOLUTION NMR

e1py6B1[B:5-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BACTERIORHODOPSIN ; ligands: RET ; X-RAY DIFFRACTION 1.8Å

e1q5iB1[B:5-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Bacteriorhodopsin ; ligands: RET ; X-RAY DIFFRACTION 2.2Å

e1q5iA1[A:5-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Bacteriorhodopsin ; ligands: RET ; X-RAY DIFFRACTION 2.2Å

e1qhjA1[A:5-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEIN (BACTERIORHODOPSIN) ; ligands: PH1,RET ; X-RAY DIFFRACTION 1.9Å

e1qkpA1[A:5-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BACTERIORHODOPSIN ; ligands: RET ; X-RAY DIFFRACTION 2.100Å

e1kg8A1[A:5-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed,

BACTERIORHODOPSIN ; ligands: LI1,RET ; X-RAY DIFFRACTION 2.0Å

e1ixfA1[A:5-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BACTERIORHODOPSIN ; ligands: L2P,L3P,RET ; X-RAY DIFFRACTION 2.6Å

e1c3wA1[A:5-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BACTERIORHODOPSIN (GROUND STATE WILD TYPE "BR") ; ligands: LI1,RET,SQU ; X-RAY DIFFRACTION 1.55Å

e1brrB1[B:5-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEIN (BACTERIORHODOPSIN) ; ligands: ARC,BGC,GOL,RET ; X-RAY DIFFRACTION 2.9Å

e1kgbA1[A:5-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed,

bacteriorhodopsin ; ligands: LI1,RET ; X-RAY DIFFRACTION 1.65Å

e1s8lA1[A:5-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Bacteriorhodopsin precursor ; ligands: LI1,RET ; X-RAY DIFFRACTION 2.3Å

e1e0pA1[A:5-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BACTERIORHODOPSIN, GROUND STATE ; ligands: RET ; X-RAY DIFFRACTION 2.1Å

e1s8jA1[A:5-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Bacteriorhodopsin precursor ; ligands: LI1,NO3,RET ; X-RAY DIFFRACTION 2.3Å

e1fbbA1[A:5-227] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BACTERIORHODOPSIN ; ligands: RET ; ELECTRON CRYSTALLOGRAPHY 3.2Å

e1s54B1[B:5-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

bacteriorhodopsin ; ligands: RET ; X-RAY DIFFRACTION 2.20Å

e1pxsA1[A:5-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Bacteriorhodopsin ; ligands: RET ; X-RAY DIFFRACTION 2.2Å

e1s52A1[A:5-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

bacteriorhodopsin ; ligands: RET ; X-RAY DIFFRACTION 2.28Å

e1iw9A1[A:5-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BACTERIORHODOPSIN ; ligands: L2P,L3P,RET ; X-RAY DIFFRACTION 2.5Å

e1s53A1[A:5-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

bacteriorhodopsin ; ligands: RET ; X-RAY DIFFRACTION 2.00Å

e1kmeB1[B:5-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BACTERIORHODOPSIN ; ligands: BGC,RET,SQU ; X-RAY DIFFRACTION 2.0Å

e1uazA1[A:11-236] Image Pymol Jmol Links: PDB, SCOP, CATH

ARCHAERHODOPSIN-1 ; ligands: RET ; X-RAY DIFFRACTION 3.4Å

e1fbkA1[A:5-228] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BACTERIORHODOPSIN ; ligands: RET ; ELECTRON CRYSTALLOGRAPHY 3.2Å

e1f50A1[A:5-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BACTERIORHODOPSIN ; ligands: LI1,RET,SQU ; X-RAY DIFFRACTION 1.70Å

e1kg9A1[A:5-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed,

BACTERIORHODOPSIN ; ligands: LI1,RET ; X-RAY DIFFRACTION 1.81Å

e1p8uA1[A:5-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Bacteriorhodopsin ; ligands: LI1,RET,SQU ; X-RAY DIFFRACTION 1.620Å

e1s51A1[A:5-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

bacteriorhodopsin ; ligands: RET ; X-RAY DIFFRACTION 2.0Å

e1mgyA1[A:5-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed,

Bacteriorhodopsin ; ligands: BR,K,LI1,RET ; X-RAY DIFFRACTION 2Å

e1brrC1[C:5-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEIN (BACTERIORHODOPSIN) ; ligands: ARC,GOL,RET ; X-RAY DIFFRACTION 2.9Å

e1o0aA1[A:5-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BACTERIORHODOPSIN ; ligands: LI1,RET,SQU ; X-RAY DIFFRACTION 1.62Å

e2at9A1[A:6-227] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BACTERIORHODOPSIN ; ligands: 2DP,RET ; ELECTRON CRYSTALLOGRAPHY 3.0Å

e1m0mA1[A:5-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BACTERIORHODOPSIN ; ligands: LI1,RET,SQU ; X-RAY DIFFRACTION 1.430Å

e1brxA1[A:6-228] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BACTERIORHODOPSIN ; ligands: RET ; X-RAY DIFFRACTION 2.3Å

e1xjiA1[A:8-230] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BACTERIORHODOPSIN ; ligands: C14,CPS,D10,D12,OCT,RET ; X-RAY DIFFRACTION 2.2Å

e1c8rA1[A:5-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEIN (BACTERIORHODOPSIN) ; ligands: LI1,RET,SQU ; X-RAY DIFFRACTION 1.800Å

e1bm1A1[A:7-227] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BACTERIORHODOPSIN ; ligands: DPG,RET ; X-RAY DIFFRACTION 3.5Å

e1m0lA1[A:5-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BACTERIORHODOPSIN ; ligands: LI1,RET,SQU ; X-RAY DIFFRACTION 1.47Å

e1gu8A1[A:2-219] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

SENSORY RHODOPSIN II ; ligands: CL,RET ; X-RAY DIFFRACTION 2.27Å

e2f95A1[A:3-222] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

SENSORY RHODOPSIN II ; ligands: BOG,RET ; X-RAY DIFFRACTION 2.2Å

e1h68A1[A:2-218] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

SENSORY RHODOPSIN II ; ligands: CL,RET ; X-RAY DIFFRACTION 2.1Å

e1gueA1[A:2-219] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

SENSORY RHODOPSIN II ; ligands: CL,RET ; X-RAY DIFFRACTION 2.27Å

e1jgjA1[A:1-217] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

SENSORY RHODOPSIN II ; ligands: BOG,RET ; X-RAY DIFFRACTION 2.4Å

e2f93A1[A:3-222] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

SENSORY RHODOPSIN II ; ligands: BOG,RET ; X-RAY DIFFRACTION 2.0Å

e2wjkA1[A:5-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Bacteriorhodopsin ; ligands: LI1,RET ; X-RAY DIFFRACTION 2.30Å

e3a7kA1[A:19-277] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HALORHODOPSIN ; ligands: 22B,CL,L1P,L2P,L3P,RET ; X-RAY DIFFRACTION 2.0Å

e3qbgA1[A:18-278] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HALORHODOPSIN ; ligands: 22B,BNG,RET ; X-RAY DIFFRACTION 1.8Å

e2ksyA1[A:1-247] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Sensory rhodopsin II ; SOLUTION NMR

e3utvA1[A:5-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BACTERIORHODOPSIN ; ligands: MC3,RET ; X-RAY DIFFRACTION 2.06Å

e3vhzA1[A:5-232] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BACTERIORHODOPSIN ; ligands: L2P,RET,SOG ; X-RAY DIFFRACTION 2.3Å

e1vgoA1[A:5-237] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ARCHAERHODOPSIN 2 ; ligands: BNG,RET,SO4 ; X-RAY DIFFRACTION 2.5Å

e2jafA1[A:22-263] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Halorhodopsin ; ligands: BOG,CL,PLM,RET ; X-RAY DIFFRACTION 1.600Å

e3t45A1[A:7-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Bacteriorhodopsin (GROUND STATE) ; ligands: LI1,RET ; X-RAY DIFFRACTION 3.000Å

e3qapA1[A:1-219] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Sensory rhodopsin-2 ; ligands: BOG,L2P,LFA,RET ; X-RAY DIFFRACTION 1.9Å

e4hyxB1[B:6-239] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BACTERIORHODOPSIN ; ligands: C14,D10,GOL,HEX,OCT,RET ; X-RAY DIFFRACTION 1.99Å

e4fpdA1[A:5-229] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Bacteriorhodopsin ; ligands: CL,LI1,RET ; X-RAY DIFFRACTION 2.650Å

e4gycA1[A:2-221] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Sensory rhodopsin-2 ; ligands: LFA,RET ; X-RAY DIFFRACTION 2.0501Å

e2i1xA1[A:5-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Bacteriorhodopsin ; ligands: LI1,RET,SQU ; X-RAY DIFFRACTION 2.00Å

e2i20A1[A:5-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Bacteriorhodopsin ; ligands: LI1,RET,SQU ; X-RAY DIFFRACTION 2.08Å

e2i21A1[A:5-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Bacteriorhodopsin ; ligands: LI1,RET,SQU ; X-RAY DIFFRACTION 1.84Å

e1vgoB1[B:5-239] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ARCHAERHODOPSIN 2 ; ligands: BNG,RET,SO4 ; X-RAY DIFFRACTION 2.5Å

e2jagA1[A:22-263] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Halorhodopsin ; ligands: BOG,CL,PLM,RET ; X-RAY DIFFRACTION 1.800Å

e3cocA1[A:5-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Bacteriorhodopsin ; ligands: RET ; X-RAY DIFFRACTION 2.300Å

e3cocB1[B:5-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Bacteriorhodopsin ; ligands: RET ; X-RAY DIFFRACTION 2.300Å

e3codA1[A:5-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Bacteriorhodopsin ; ligands: RET ; X-RAY DIFFRACTION 2.700Å

e3codB1[B:5-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Bacteriorhodopsin ; ligands: RET ; X-RAY DIFFRACTION 2.700Å

e2zfeA1[A:5-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BACTERIORHODOPSIN ; ligands: L1P,L2P,L3P,RET,XE ; X-RAY DIFFRACTION 2.5Å

e2ei4A1[A:1-238] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ARCHAERHODOPSIN-2 ; ligands: 22B,GLC,L2P,RET ; X-RAY DIFFRACTION 2.1Å

e2z55A1[A:1-242] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ARCHAERHODOPSIN-2 ; ligands: 22B,L2P,RET ; X-RAY DIFFRACTION 2.5Å

e2z55B1[B:1-238] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ARCHAERHODOPSIN-2 ; ligands: 22B,L2P,RET ; X-RAY DIFFRACTION 2.5Å

e2z55D1[D:5-241] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ARCHAERHODOPSIN-2 ; ligands: 22B,L2P,RET ; X-RAY DIFFRACTION 2.5Å

e2z55E1[E:1-238] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ARCHAERHODOPSIN-2 ; ligands: 22B,L2P,RET ; X-RAY DIFFRACTION 2.5Å

e3haoA1[A:6-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Bacteriorhodopsin ; ligands: RET ; X-RAY DIFFRACTION 2.490Å

e3haoB1[B:6-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Bacteriorhodopsin ; ligands: RET ; X-RAY DIFFRACTION 2.490Å

e3hapA1[A:6-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Bacteriorhodopsin ; ligands: CPS,D10,D12,DD9,R16,RET ; X-RAY DIFFRACTION 1.600Å

e3hasA1[A:6-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Bacteriorhodopsin ; ligands: CPS,D10,D12,R16,RET ; X-RAY DIFFRACTION 1.900Å

e3haqA1[A:6-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Bacteriorhodopsin ; ligands: CPS,D10,D12,DD9,R16,RET ; X-RAY DIFFRACTION 2.300Å

e3harA1[A:6-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Bacteriorhodopsin ; ligands: CPS,RET ; X-RAY DIFFRACTION 1.700Å

e2zzlA1[A:5-232] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BACTERIORHODOPSIN ; ligands: L1P,L2P,L3P,RET,SOG ; X-RAY DIFFRACTION 2.03Å

e2wjlA1[A:5-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Bacteriorhodopsin ; ligands: RET ; X-RAY DIFFRACTION 2.15Å

e3hanA1[A:6-230] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Bacteriorhodopsin ; ligands: RET ; X-RAY DIFFRACTION 2.750Å

e3a7kB1[B:19-276] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HALORHODOPSIN ; ligands: 22B,CL,L1P,L2P,L3P,RET ; X-RAY DIFFRACTION 2.0Å

e3a7kD1[D:19-277] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HALORHODOPSIN ; ligands: 22B,CL,L1P,L2P,L3P,RET ; X-RAY DIFFRACTION 2.0Å

e3mbvA1[A:5-231] Image Pymol Jmol Links: PDB, SCOP, CATHDOI

BACTERIORHODOPSIN ; ligands: BXC,RET ; X-RAY DIFFRACTION 2.0Å

e3ns0A1[A:6-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BACTERIORHODOPSIN ; ligands: LI1,RET ; X-RAY DIFFRACTION 1.78Å

e3nsbA1[A:6-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BACTERIORHODOPSIN ; ligands: LI1,RET ; X-RAY DIFFRACTION 1.78Å

e3qdcA1[A:1-219] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Sensory rhodopsin-2 ; ligands: BOG,L2P,LFA,RET ; X-RAY DIFFRACTION 2.4Å

e3abwA1[A:18-277] Image Pymol Jmol Links: PDB, SCOP, CATH

HALORHODOPSIN ; ligands: 22B,AZI,L3P,RET ; X-RAY DIFFRACTION 1.9Å

e3abwB1[B:18-276] Image Pymol Jmol Links: PDB, SCOP, CATH

HALORHODOPSIN ; ligands: 22B,AZI,L3P,RET ; X-RAY DIFFRACTION 1.9Å

e3abwD1[D:18-276] Image Pymol Jmol Links: PDB, SCOP, CATH

HALORHODOPSIN ; ligands: 22B,AZI,L3P,RET ; X-RAY DIFFRACTION 1.9Å

e3qbgB1[B:18-277] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HALORHODOPSIN ; ligands: 22B,BNG,RET ; X-RAY DIFFRACTION 1.8Å

e3qbgD1[D:18-277] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HALORHODOPSIN ; ligands: 22B,BNG,RET ; X-RAY DIFFRACTION 1.8Å

e3qbiA1[A:18-278] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HALORHODOPSIN ; ligands: 22B,BNG,RET ; X-RAY DIFFRACTION 2.1Å

e3qbiB1[B:18-277] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HALORHODOPSIN ; ligands: 22B,BNG,RET ; X-RAY DIFFRACTION 2.1Å

e3qbiD1[D:18-277] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HALORHODOPSIN ; ligands: 22B,BNG,RET ; X-RAY DIFFRACTION 2.1Å

e3qbkA1[A:17-277] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HALORHODOPSIN ; ligands: 22B,BR,RET ; X-RAY DIFFRACTION 2.2Å

e3qbkB1[B:18-276] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HALORHODOPSIN ; ligands: 22B,BR,RET ; X-RAY DIFFRACTION 2.2Å

e3qbkD1[D:18-276] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HALORHODOPSIN ; ligands: 22B,BR,RET ; X-RAY DIFFRACTION 2.2Å

e3qblA1[A:18-277] Image Pymol Jmol Links: PDB, SCOP, CATH

HALORHODOPSIN ; ligands: 22B,NO3,RET ; X-RAY DIFFRACTION 2.2Å

e3qblB1[B:18-276] Image Pymol Jmol Links: PDB, SCOP, CATH

HALORHODOPSIN ; ligands: 22B,NO3,RET ; X-RAY DIFFRACTION 2.2Å

e3qblD1[D:18-276] Image Pymol Jmol Links: PDB, SCOP, CATH

HALORHODOPSIN ; ligands: 22B,NO3,RET ; X-RAY DIFFRACTION 2.2Å

e3t45B1[B:7-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Bacteriorhodopsin (GROUND STATE) ; ligands: LI1,RET ; X-RAY DIFFRACTION 3.000Å

e3t45C1[C:7-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Bacteriorhodopsin (GROUND STATE) ; ligands: LI1,RET ; X-RAY DIFFRACTION 3.000Å

e3utyA1[A:1-215] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BACTERIORHODOPSIN ; ligands: D12,RET ; X-RAY DIFFRACTION 2.37Å

e3utxB1[B:1-215] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BACTERIORHODOPSIN ; ligands: D12,RET ; X-RAY DIFFRACTION 2.47Å

e3vi0A1[A:-12-215] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BACTERIORHODOPSIN ; ligands: L2P,RET,SOG ; X-RAY DIFFRACTION 2.3Å

e3utwA1[A:1-215] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BACTERIORHODOPSIN ; ligands: BOG,MC3,RET ; X-RAY DIFFRACTION 2.4Å

e3utyB1[B:1-215] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BACTERIORHODOPSIN ; ligands: RET ; X-RAY DIFFRACTION 2.37Å

e3utxA1[A:1-215] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BACTERIORHODOPSIN ; ligands: RET ; X-RAY DIFFRACTION 2.47Å

e4fbzA1[A:1-238] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

DELTARHODOPSIN ; ligands: 22B,BNG,L2P,RET,SO4,SQL ; X-RAY DIFFRACTION 2.7Å

e3vvkC1[C:18-276] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HALORHODOPSIN ; ligands: 22B,AZI,BNG,L3P,RET ; X-RAY DIFFRACTION 2.3Å

e3vvkE1[E:18-276] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HALORHODOPSIN ; ligands: 22B,AZI,BNG,L3P,RET ; X-RAY DIFFRACTION 2.3Å

e3vvkF1[F:18-276] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HALORHODOPSIN ; ligands: 22B,AZI,BNG,L3P,RET ; X-RAY DIFFRACTION 2.3Å

e3vvkA1[A:18-278] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HALORHODOPSIN ; ligands: 22B,AZI,BNG,L3P,RET ; X-RAY DIFFRACTION 2.3Å

e3vvkB1[B:19-276] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HALORHODOPSIN ; ligands: 22B,AZI,BNG,L3P,RET ; X-RAY DIFFRACTION 2.3Å

e3vvkD1[D:18-277] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HALORHODOPSIN ; ligands: 22B,AZI,BNG,L3P,RET ; X-RAY DIFFRACTION 2.3Å

e4jr8A1[A:4-237] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Cruxrhodopsin-3 ; ligands: 22B,RET ; X-RAY DIFFRACTION 2.3Å

e4l35A1[A:1-244] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Cruxrhodopsin-3 ; ligands: 22B,RET ; X-RAY DIFFRACTION 2.10Å

e4ov0A1[A:7-226] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Bacteriorhodopsin ; ligands: RET ; X-RAY DIFFRACTION 2.0Å

e4md1A1[A:5-234] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Bacteriorhodopsin ; ligands: L2P,SQL ; X-RAY DIFFRACTION 1.73Å

e4md2A1[A:5-234] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Bacteriorhodopsin ; ligands: L2P,SQL ; X-RAY DIFFRACTION 1.73Å

e3wqjA1[A:1-234] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Archaerhodopsin-2 ; ligands: 22B,L2P,L3P,L4P,RET,SO4,SQL ; X-RAY DIFFRACTION 1.8Å

e4hwlA2[A:5-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BACTERIORHODOPSIN ; ligands: HEX,HP6,RET ; X-RAY DIFFRACTION 2.0Å

e4hwlB2[B:5-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BACTERIORHODOPSIN ; ligands: GOL,HEX,RET ; X-RAY DIFFRACTION 2.0Å

e4hyxA2[A:6-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BACTERIORHODOPSIN ; ligands: D10,OCT,RET ; X-RAY DIFFRACTION 1.99Å

e4pxkA1[A:3-238] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Bacteriorhodopsin ; ligands: LFA,SO4 ; X-RAY DIFFRACTION 2.5Å

e4x31A1[A:5-233] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Bacteriorhodopsin ; ligands: LI1,RET ; X-RAY DIFFRACTION 2.40Å

e4x32A1[A:5-232] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Bacteriorhodopsin ; ligands: LI1,RET ; X-RAY DIFFRACTION 1.900Å

e5ahyA1[A:20-261] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HALORHODOPSIN ; ligands: BOG,CL,RET ; X-RAY DIFFRACTION 2.15Å

e5ahzA1[A:20-262] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HALORHODOPSIN ; ligands: BOG,BR,RET ; X-RAY DIFFRACTION 2.45Å

e4qryB1[B:19-276] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Halorhodopsin ; ligands: BNG,BR,L2P,RET ; X-RAY DIFFRACTION 2.2Å

e4qryC1[C:18-276] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Halorhodopsin ; ligands: BNG,BR,L2P,RET ; X-RAY DIFFRACTION 2.2Å

e4qryF1[F:18-276] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Halorhodopsin ; ligands: BNG,BR,L2P,RET ; X-RAY DIFFRACTION 2.2Å

e4qryG1[G:18-276] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Halorhodopsin ; ligands: BNG,BR,L2P,RET ; X-RAY DIFFRACTION 2.2Å

e4qryA1[A:17-277] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Halorhodopsin ; ligands: BNG,BR,L2P,RET ; X-RAY DIFFRACTION 2.2Å

e4qryE1[E:17-277] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Halorhodopsin ; ligands: BNG,BR,L2P,RET ; X-RAY DIFFRACTION 2.2Å

e4xxjA1[A:4-232] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Bacteriorhodopsin ; ligands: LFA,MPG ; X-RAY DIFFRACTION 1.9Å

e4xxjB1[B:4-232] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Bacteriorhodopsin ; ligands: LFA,MPG ; X-RAY DIFFRACTION 1.9Å

e4xxjC1[C:4-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Bacteriorhodopsin ; ligands: LFA,MPG ; X-RAY DIFFRACTION 1.9Å

e4qi1B1[B:11-238] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Bacteriorhodopsin-I ; ligands: MPG,RET ; X-RAY DIFFRACTION 1.85Å

e4qi1C1[C:11-238] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Bacteriorhodopsin-I ; ligands: MPG,RET ; X-RAY DIFFRACTION 1.85Å

e4qidA1[A:12-239] Image Pymol Jmol Links: PDB, SCOP, CATH

Bacteriorhodopsin-I ; ligands: ACT,RET ; X-RAY DIFFRACTION 2.57Å

e4qidB1[B:14-237] Image Pymol Jmol Links: PDB, SCOP, CATH

Bacteriorhodopsin-I ; ligands: MPG,RET ; X-RAY DIFFRACTION 2.57Å

e4qi1A1[A:11-238] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Bacteriorhodopsin-I ; ligands: GOL,MPG,RET ; X-RAY DIFFRACTION 1.85Å

e4wavA1[A:12-238] Image Pymol Jmol Links: PDB, SCOP, CATH

Bacteriorhodopsin-I ; ligands: MPG,RET ; X-RAY DIFFRACTION 2.800Å

e4wavB1[B:11-236] Image Pymol Jmol Links: PDB, SCOP, CATH

Bacteriorhodopsin-I ; ligands: RET ; X-RAY DIFFRACTION 2.800Å

e5a44A1[A:6-228] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BACTERIORHODOPSIN ; ligands: LI1,RET ; X-RAY DIFFRACTION 2.29Å

e5a45A1[A:6-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BACTERIORHODOPSIN ; ligands: RET ; X-RAY DIFFRACTION 2.54Å

e4y9hA1[A:6-231] Image Pymol Jmol Links: PDB, SCOP, CATH

Bacteriorhodopsin ; ligands: D10,D12,DD9,PO4,R16,RET ; X-RAY DIFFRACTION 1.43Å

e5b0wA1[A:18-278] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Halorhodopsin ; ligands: 22B,BNG,ILE,L3P,RET ; X-RAY DIFFRACTION 1.7Å

e5b0wB1[B:18-277] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Halorhodopsin ; ligands: 22B,BNG,ILE,L3P,RET ; X-RAY DIFFRACTION 1.7Å

e5b0wD1[D:18-276] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Halorhodopsin ; ligands: BNG,ILE,L3P,RET ; X-RAY DIFFRACTION 1.7Å

e5b0wE1[E:18-277] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Halorhodopsin ; ligands: 22B,BNG,ILE,L3P,RET ; X-RAY DIFFRACTION 1.7Å

e5b0wF1[F:18-277] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Halorhodopsin ; ligands: 22B,BNG,ILE,L3P,RET ; X-RAY DIFFRACTION 1.7Å

e5b0wG1[G:18-276] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Halorhodopsin ; ligands: BNG,ILE,L3P,RET ; X-RAY DIFFRACTION 1.7Å

e5etzA1[A:18-278] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Halorhodopsin ; ligands: 22B,BNG,L3P,RET ; X-RAY DIFFRACTION 1.8Å

Next

e1e12A1[A:24-262] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HALORHODOPSIN ; ligands: CL,K,MPG,PLM,RET ; X-RAY DIFFRACTION 1.800Å

e1h2sA1[A:1-225] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

SENSORY RHODOPSIN II ; ligands: BOG,RET ; X-RAY DIFFRACTION 1.930Å

e1xioA1[A:1-226] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ANABAENA SENSORY RHODOPSIN ; ligands: PEE,RET ; X-RAY DIFFRACTION 2.00Å

F: Unmapped domains

Pseudo group of domains that do not map to PFam family profiles. Domains inside should not be considered as in one family.

alpha superhelicesrepeating alpha-helix hairpins form a superhelix

alpha duplicates or obligate multimersalpha duplicates or monomers associate together to form a compact domain

alpha complex topologyalpha domain with complex and unique topology that cannot be described as array or bundle or superhelix

beta barrelssingle beta-sheet folded upon itself to form a barrel

beta meanderssingle beta-sheet with mainly meander topology

beta sandwichestwo beta-sheets stacked together to form a sandwich

beta duplicates or obligate multimersbeta duplicates or monomers associate together to form a compact domain

beta complex topologybeta domains with complex and unique topology that cannot be described as barrel or sandwich or meander

a+b two layersone alpha-helix layer and one beta-sheet layer

a+b three layersone mainly antiparallel beta-sheet layer sandwiched between two alpha-helix layers

a+b four layerstwo beta-sheet layers sandwiched between two alpha-helix layers

a+b complex topologyalpha and beta domain with complex and unique topology that cannot be described in layers

a+b duplicates or obligate multimersalpha and beta duplicates or monomers associated together to form a compact domain

a/b barrelsrepeating beta-alpha units form a barrel

a/b three-layered sandwichesrepeating beta-alpha units form a sandwich with a mainly parallel beta-sheet layer stacked between two alpha-helix layers

mixed a+b and a/balpha and beta domain consists of both a+b and a/b regions

few secondary structure elementsstabilized by cofactors or disulfides

extended segmentsextended, non-globular segments, frequently bind to other proteins to form complexes