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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

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

X: LuxS, MPP, ThrRS/AlaRS common domain

looks like an elaborated ferredoxin

X: ClpS-like

contains a HTH motif

X: Thioesterase/thiol ester dehydrase-isomerase-like
H: Thioesterase/thiol ester dehydrase-isomerase
T: Thioesterase/thiol ester dehydrase-isomerase
F: 4HBT

PF03061 CL0050

Representatives:

e1vh5A1[A:0-137] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Hypothetical protein ydiI ; X-RAY DIFFRACTION 1.280Å

e3lw3A1[A:9-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HP0420 HOMOLOGUE ; X-RAY DIFFRACTION 1.6Å

e4k02A1[A:10-136] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

1,4-dihydroxy-2-naphthoyl-CoA thioesterase ; X-RAY DIFFRACTION 1.90Å

e1psuA1[A:1-131] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Phenylacetic acid degradation protein PaaI ; X-RAY DIFFRACTION 1.90Å

e3lw3B1[B:-3-135] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HP0420 HOMOLOGUE ; X-RAY DIFFRACTION 1.6Å

e1j1yA1[A:2-117] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PAAI PROTEIN ; ligands: CL ; X-RAY DIFFRACTION 1.7Å

e3lwgA1[A:10-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HP0420 HOMOLOGUE ; X-RAY DIFFRACTION 1.8Å

e1vh9A1[A:0-137] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HYPOTHETICAL PROTEIN YBDB ; X-RAY DIFFRACTION 2.15Å

e3lwgB1[B:-2-138] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HP0420 HOMOLOGUE ; X-RAY DIFFRACTION 1.8Å

e2cy9A1[A:13-138] Image Pymol Jmol Links: PDB, SCOP, CATH

THIOESTERASE SUPERFAMILY MEMBER 2 ; X-RAY DIFFRACTION 2.72Å

e3hduA1[A:4-156] Image Pymol Jmol Links: PDB, SCOP, CATH

putative thioesterase ; X-RAY DIFFRACTION 2.50Å

e3lz7A1[A:1-143] Image Pymol Jmol Links: PDB, SCOP, CATH

Putative esterase HI1161 ; ligands: PEG ; X-RAY DIFFRACTION 2.191Å

e3gekA1[A:1-134] Image Pymol Jmol Links: PDB, SCOP, CATH

Putative thioesterase yhdA ; X-RAY DIFFRACTION 2.24Å

e3f5oA1[A:2-139] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

THIOESTERASE SUPERFAMILY MEMBER 2 ; ligands: CL,COA,P6G,UOC ; X-RAY DIFFRACTION 1.7Å

e3lbbA1[A:4-127] Image Pymol Jmol Links: PDB, SCOP, CATH

PUTATIVE UNCHARACTERIZED PROTEIN SMU.793 ; ligands: SO4 ; X-RAY DIFFRACTION 2.1Å

e3s4kA1[A:15-140] Image Pymol Jmol Links: PDB, SCOP, CATH

Putative esterase Rv1847/MT1895 ; ligands: CL,EDO,SO4 ; X-RAY DIFFRACTION 1.700Å

e4i82A1[A:5-125] Image Pymol Jmol Links: PDB, SCOP, CATH

Putative uncharacterized protein ; X-RAY DIFFRACTION 2.49Å

e2prxA1[A:6-151] Image Pymol Jmol Links: PDB, SCOP, CATH

Thioesterase superfamily protein ; X-RAY DIFFRACTION 1.500Å

e3dkzA1[A:39-163] Image Pymol Jmol Links: PDB, SCOP, CATH

THIOESTERASE SUPERFAMILY PROTEIN ; X-RAY DIFFRACTION 2.4Å

e2qwzA1[A:-5-138] Image Pymol Jmol Links: PDB, SCOP, CATH

Phenylacetic acid degradation-related protein ; ligands: ACT,GOL ; X-RAY DIFFRACTION 2.15Å

e3e8pA1[A:12-164] Image Pymol Jmol Links: PDB, SCOP, CATH

uncharacterized protein ; X-RAY DIFFRACTION 2.3Å

e3f1tB1[B:3-139] Image Pymol Jmol Links: PDB, SCOP, CATH

uncharacterized protein Q9I3C8_PSEAE ; ligands: MG ; X-RAY DIFFRACTION 2.20Å

e3e29B1[B:1-135] Image Pymol Jmol Links: PDB, SCOP, CATH

uncharacterized protein Q7WE92_BORBR ; X-RAY DIFFRACTION 2.4Å

e3e1eC1[C:1-141] Image Pymol Jmol Links: PDB, SCOP, CATH

Thioesterase family protein ; X-RAY DIFFRACTION 2.0Å

e1wlvA1[A:2-117] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

phenylacetic acid degradation protein PaaI ; ligands: CL,COA ; X-RAY DIFFRACTION 1.9Å

e1wlvB1[B:2-117] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

phenylacetic acid degradation protein PaaI ; ligands: CL,COA ; X-RAY DIFFRACTION 1.9Å

e1wlvH1[H:2-117] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

phenylacetic acid degradation protein PaaI ; ligands: CL,COA ; X-RAY DIFFRACTION 1.9Å

e1wm6A1[A:2-117] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

phenylacetic acid degradation protein PaaI ; ligands: CL ; X-RAY DIFFRACTION 2.4Å

e1wm6B1[B:2-117] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

phenylacetic acid degradation protein PaaI ; ligands: CL ; X-RAY DIFFRACTION 2.4Å

e1wm6C1[C:2-117] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

phenylacetic acid degradation protein PaaI ; ligands: CL ; X-RAY DIFFRACTION 2.4Å

e1wm6D1[D:2-117] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

phenylacetic acid degradation protein PaaI ; ligands: CL ; X-RAY DIFFRACTION 2.4Å

e1wm6F1[F:2-117] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

phenylacetic acid degradation protein PaaI ; ligands: CL ; X-RAY DIFFRACTION 2.4Å

e1wm6H1[H:2-117] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

phenylacetic acid degradation protein PaaI ; ligands: CL ; X-RAY DIFFRACTION 2.4Å

e1wn3A1[A:2-117] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PHENYLACETIC ACID DEGRADATION PROTEIN PAAI ; ligands: CL,HXC ; X-RAY DIFFRACTION 2.1Å

e1wn3B1[B:2-117] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PHENYLACETIC ACID DEGRADATION PROTEIN PAAI ; ligands: CL,HXC ; X-RAY DIFFRACTION 2.1Å

e1wn3D1[D:2-117] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PHENYLACETIC ACID DEGRADATION PROTEIN PAAI ; ligands: CL,HXC ; X-RAY DIFFRACTION 2.1Å

e1wn3F1[F:2-117] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PHENYLACETIC ACID DEGRADATION PROTEIN PAAI ; ligands: CL,HXC ; X-RAY DIFFRACTION 2.1Å

e1wn3H1[H:2-117] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PHENYLACETIC ACID DEGRADATION PROTEIN PAAI ; ligands: CL,HXC ; X-RAY DIFFRACTION 2.1Å

e1j1yB1[B:3-117] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PAAI PROTEIN ; ligands: CL ; X-RAY DIFFRACTION 1.7Å

e1wlvC1[C:3-117] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

phenylacetic acid degradation protein PaaI ; ligands: CL,COA ; X-RAY DIFFRACTION 1.9Å

e1wlvD1[D:3-117] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

phenylacetic acid degradation protein PaaI ; ligands: CL,COA ; X-RAY DIFFRACTION 1.9Å

e1wlvE1[E:3-117] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

phenylacetic acid degradation protein PaaI ; ligands: ACT,CL,COA ; X-RAY DIFFRACTION 1.9Å

e1wlvF1[F:3-117] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

phenylacetic acid degradation protein PaaI ; ligands: CL,COA ; X-RAY DIFFRACTION 1.9Å

e1wlvG1[G:3-117] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

phenylacetic acid degradation protein PaaI ; ligands: ACT,CL,COA ; X-RAY DIFFRACTION 1.9Å

e1wm6E1[E:3-117] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

phenylacetic acid degradation protein PaaI ; ligands: CL ; X-RAY DIFFRACTION 2.4Å

e1wm6G1[G:3-117] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

phenylacetic acid degradation protein PaaI ; ligands: CL ; X-RAY DIFFRACTION 2.4Å

e1wn3C1[C:3-117] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PHENYLACETIC ACID DEGRADATION PROTEIN PAAI ; ligands: CL,HXC ; X-RAY DIFFRACTION 2.1Å

e1wn3E1[E:3-117] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PHENYLACETIC ACID DEGRADATION PROTEIN PAAI ; ligands: ACT,CL,HXC ; X-RAY DIFFRACTION 2.1Å

e1wn3G1[G:3-117] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PHENYLACETIC ACID DEGRADATION PROTEIN PAAI ; ligands: ACT,CL,HXC ; X-RAY DIFFRACTION 2.1Å

e2dslA1[A:3-117] Image Pymol Jmol Links: PDB, SCOP, CATH

Phenylacetic acid degradation protein PaaI ; ligands: CL ; X-RAY DIFFRACTION 1.7Å

e2dslB1[B:3-117] Image Pymol Jmol Links: PDB, SCOP, CATH

Phenylacetic acid degradation protein PaaI ; ligands: CL ; X-RAY DIFFRACTION 1.7Å

e1q4sA1[A:11-150] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Thioesterase ; ligands: COA,PHB ; X-RAY DIFFRACTION 1.95Å

e1q4tA1[A:11-150] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Thioesterase ; ligands: 4CO,CL,EDO ; X-RAY DIFFRACTION 1.60Å

e1q4sB1[B:12-150] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Thioesterase ; ligands: COA,PHB ; X-RAY DIFFRACTION 1.95Å

e1q4tB1[B:12-150] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Thioesterase ; ligands: 4CO,CL,EDO ; X-RAY DIFFRACTION 1.60Å

e1q4uB1[B:12-150] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Thioesterase ; ligands: 4CA,EDO ; X-RAY DIFFRACTION 1.60Å

e3f5oE1[E:2-139] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

THIOESTERASE SUPERFAMILY MEMBER 2 ; ligands: CL,COA,P6G,UOC ; X-RAY DIFFRACTION 1.7Å

e3f5oF1[F:2-139] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

THIOESTERASE SUPERFAMILY MEMBER 2 ; ligands: CL,COA,P6G,UOC ; X-RAY DIFFRACTION 1.7Å

e3f5oH1[H:2-139] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

THIOESTERASE SUPERFAMILY MEMBER 2 ; ligands: CL,COA,P6G,UOC ; X-RAY DIFFRACTION 1.7Å

e3f5oC1[C:3-139] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

THIOESTERASE SUPERFAMILY MEMBER 2 ; ligands: CL,COA,P6G,UOC ; X-RAY DIFFRACTION 1.7Å

e3f5oD1[D:3-139] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

THIOESTERASE SUPERFAMILY MEMBER 2 ; ligands: CL,COA,P6G,UOC ; X-RAY DIFFRACTION 1.7Å

e2f0xB1[B:3-138] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Thioesterase superfamily member 2 ; ligands: SO4 ; X-RAY DIFFRACTION 2.30Å

e2f0xC1[C:3-138] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Thioesterase superfamily member 2 ; ligands: SO4 ; X-RAY DIFFRACTION 2.30Å

e2f0xF1[F:3-138] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Thioesterase superfamily member 2 ; ligands: SO4 ; X-RAY DIFFRACTION 2.30Å

e2f0xG1[G:3-138] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Thioesterase superfamily member 2 ; ligands: SO4 ; X-RAY DIFFRACTION 2.30Å

e3f5oB1[B:4-139] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

THIOESTERASE SUPERFAMILY MEMBER 2 ; ligands: COA,P6G,UOC ; X-RAY DIFFRACTION 1.7Å

e3f5oG1[G:4-139] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

THIOESTERASE SUPERFAMILY MEMBER 2 ; ligands: CL,COA,P6G,UOC ; X-RAY DIFFRACTION 1.7Å

e2f0xD1[D:4-138] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Thioesterase superfamily member 2 ; ligands: SO4 ; X-RAY DIFFRACTION 2.30Å

e2f0xE1[E:4-138] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Thioesterase superfamily member 2 ; ligands: SO4 ; X-RAY DIFFRACTION 2.30Å

e2f0xH1[H:4-138] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Thioesterase superfamily member 2 ; ligands: SO4 ; X-RAY DIFFRACTION 2.30Å

e3lz7C1[C:1-143] Image Pymol Jmol Links: PDB, SCOP, CATH

Putative esterase HI1161 ; X-RAY DIFFRACTION 2.191Å

e3lz7D1[D:1-141] Image Pymol Jmol Links: PDB, SCOP, CATH

Putative esterase HI1161 ; ligands: PEG ; X-RAY DIFFRACTION 2.191Å

e3lz7B1[B:1-140] Image Pymol Jmol Links: PDB, SCOP, CATH

Putative esterase HI1161 ; X-RAY DIFFRACTION 2.191Å

e1sc0A1[A:2-137] Image Pymol Jmol Links: PDB, SCOP, CATH

HYPOTHETICAL PROTEIN HI1161 ; X-RAY DIFFRACTION 1.7Å

e1sc0B1[B:2-137] Image Pymol Jmol Links: PDB, SCOP, CATH

HYPOTHETICAL PROTEIN HI1161 ; X-RAY DIFFRACTION 1.7Å

e2b6eA1[A:2-137] Image Pymol Jmol Links: PDB, SCOP, CATH

HYPOTHETICAL UPF0152 PROTEIN HI1161 ; ligands: ACY ; X-RAY DIFFRACTION 1.9Å

e2b6eB1[B:2-137] Image Pymol Jmol Links: PDB, SCOP, CATH

HYPOTHETICAL UPF0152 PROTEIN HI1161 ; ligands: ACY ; X-RAY DIFFRACTION 1.9Å

e2b6eC1[C:2-137] Image Pymol Jmol Links: PDB, SCOP, CATH

HYPOTHETICAL UPF0152 PROTEIN HI1161 ; ligands: ACY ; X-RAY DIFFRACTION 1.9Å

e2b6eD1[D:2-137] Image Pymol Jmol Links: PDB, SCOP, CATH

HYPOTHETICAL UPF0152 PROTEIN HI1161 ; ligands: ACY ; X-RAY DIFFRACTION 1.9Å

e2b6eE1[E:2-137] Image Pymol Jmol Links: PDB, SCOP, CATH

HYPOTHETICAL UPF0152 PROTEIN HI1161 ; ligands: ACY ; X-RAY DIFFRACTION 1.9Å

e2b6eF1[F:2-137] Image Pymol Jmol Links: PDB, SCOP, CATH

HYPOTHETICAL UPF0152 PROTEIN HI1161 ; ligands: ACY ; X-RAY DIFFRACTION 1.9Å

e2b6eG1[G:2-137] Image Pymol Jmol Links: PDB, SCOP, CATH

HYPOTHETICAL UPF0152 PROTEIN HI1161 ; ligands: ACY ; X-RAY DIFFRACTION 1.9Å

e2b6eH1[H:2-137] Image Pymol Jmol Links: PDB, SCOP, CATH

HYPOTHETICAL UPF0152 PROTEIN HI1161 ; ligands: ACY ; X-RAY DIFFRACTION 1.9Å

e1vh5B1[B:0-137] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Hypothetical protein ydiI ; X-RAY DIFFRACTION 1.280Å

e1vi8A1[A:0-137] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Hypothetical protein ydiI ; X-RAY DIFFRACTION 2.20Å

e1vi8B1[B:0-137] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Hypothetical protein ydiI ; X-RAY DIFFRACTION 2.20Å

e1vi8C1[C:0-137] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Hypothetical protein ydiI ; X-RAY DIFFRACTION 2.20Å

e1vi8D1[D:0-137] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Hypothetical protein ydiI ; X-RAY DIFFRACTION 2.20Å

e1vi8E1[E:0-137] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Hypothetical protein ydiI ; X-RAY DIFFRACTION 2.20Å

e1vi8F1[F:0-137] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Hypothetical protein ydiI ; X-RAY DIFFRACTION 2.20Å

e1vi8H1[H:0-137] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Hypothetical protein ydiI ; X-RAY DIFFRACTION 2.20Å

e1sbkA1[A:1-137] Image Pymol Jmol Links: PDB, SCOP, CATH

HYPOTHETICAL PROTEIN YDII ; ligands: SO4 ; X-RAY DIFFRACTION 2.0Å

e1sbkB1[B:1-137] Image Pymol Jmol Links: PDB, SCOP, CATH

HYPOTHETICAL PROTEIN YDII ; ligands: SO4 ; X-RAY DIFFRACTION 2.0Å

e1sbkC1[C:1-137] Image Pymol Jmol Links: PDB, SCOP, CATH

HYPOTHETICAL PROTEIN YDII ; ligands: SO4 ; X-RAY DIFFRACTION 2.0Å

e1sbkD1[D:1-137] Image Pymol Jmol Links: PDB, SCOP, CATH

HYPOTHETICAL PROTEIN YDII ; ligands: SO4 ; X-RAY DIFFRACTION 2.0Å

e1vi8G1[G:1-137] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Hypothetical protein ydiI ; X-RAY DIFFRACTION 2.20Å

e3e1eE1[E:1-141] Image Pymol Jmol Links: PDB, SCOP, CATH

Thioesterase family protein ; X-RAY DIFFRACTION 2.0Å

e3e1eF1[F:1-141] Image Pymol Jmol Links: PDB, SCOP, CATH

Thioesterase family protein ; X-RAY DIFFRACTION 2.0Å

e3e1eG1[G:1-141] Image Pymol Jmol Links: PDB, SCOP, CATH

Thioesterase family protein ; X-RAY DIFFRACTION 2.0Å

e3e1eH1[H:1-141] Image Pymol Jmol Links: PDB, SCOP, CATH

Thioesterase family protein ; X-RAY DIFFRACTION 2.0Å

e3e1eB1[B:2-141] Image Pymol Jmol Links: PDB, SCOP, CATH

Thioesterase family protein ; X-RAY DIFFRACTION 2.0Å

e3e1eD1[D:5-141] Image Pymol Jmol Links: PDB, SCOP, CATH

Thioesterase family protein ; X-RAY DIFFRACTION 2.0Å

e3e1eA1[A:6-141] Image Pymol Jmol Links: PDB, SCOP, CATH

Thioesterase family protein ; X-RAY DIFFRACTION 2.0Å

e2cy9B1[B:13-138] Image Pymol Jmol Links: PDB, SCOP, CATH

THIOESTERASE SUPERFAMILY MEMBER 2 ; X-RAY DIFFRACTION 2.72Å

e2h4uA1[A:19-138] Image Pymol Jmol Links: PDB, SCOP, CATH

THIOESTERASE SUPERFAMILY MEMBER 2 ; X-RAY DIFFRACTION 2.2Å

e2h4uB1[B:19-138] Image Pymol Jmol Links: PDB, SCOP, CATH

THIOESTERASE SUPERFAMILY MEMBER 2 ; X-RAY DIFFRACTION 2.2Å

e2h4uC1[C:19-138] Image Pymol Jmol Links: PDB, SCOP, CATH

THIOESTERASE SUPERFAMILY MEMBER 2 ; X-RAY DIFFRACTION 2.2Å

e2h4uD1[D:19-138] Image Pymol Jmol Links: PDB, SCOP, CATH

THIOESTERASE SUPERFAMILY MEMBER 2 ; X-RAY DIFFRACTION 2.2Å

e3lbbB1[B:4-127] Image Pymol Jmol Links: PDB, SCOP, CATH

PUTATIVE UNCHARACTERIZED PROTEIN SMU.793 ; ligands: CL,SO4 ; X-RAY DIFFRACTION 2.1Å

e3lbeB1[B:4-127] Image Pymol Jmol Links: PDB, SCOP, CATH

PUTATIVE UNCHARACTERIZED PROTEIN SMU.793 ; ligands: CL,COA ; X-RAY DIFFRACTION 1.7Å

e3lbeD1[D:4-126] Image Pymol Jmol Links: PDB, SCOP, CATH

PUTATIVE UNCHARACTERIZED PROTEIN SMU.793 ; ligands: CL,COA ; X-RAY DIFFRACTION 1.7Å

e3lbeA1[A:5-126] Image Pymol Jmol Links: PDB, SCOP, CATH

PUTATIVE UNCHARACTERIZED PROTEIN SMU.793 ; ligands: CL,COA ; X-RAY DIFFRACTION 1.7Å

e3lbeC1[C:5-126] Image Pymol Jmol Links: PDB, SCOP, CATH

PUTATIVE UNCHARACTERIZED PROTEIN SMU.793 ; ligands: COA ; X-RAY DIFFRACTION 1.7Å

e3e8pB1[B:12-164] Image Pymol Jmol Links: PDB, SCOP, CATH

uncharacterized protein ; X-RAY DIFFRACTION 2.3Å

e3e8pC1[C:12-164] Image Pymol Jmol Links: PDB, SCOP, CATH

uncharacterized protein ; X-RAY DIFFRACTION 2.3Å

e3e8pD1[D:12-164] Image Pymol Jmol Links: PDB, SCOP, CATH

uncharacterized protein ; X-RAY DIFFRACTION 2.3Å

e2qwzB1[B:-5-138] Image Pymol Jmol Links: PDB, SCOP, CATH

Phenylacetic acid degradation-related protein ; ligands: ACT,GOL ; X-RAY DIFFRACTION 2.15Å

e2qwzC1[C:1-138] Image Pymol Jmol Links: PDB, SCOP, CATH

Phenylacetic acid degradation-related protein ; ligands: ACT,GOL ; X-RAY DIFFRACTION 2.15Å

e2qwzD1[D:2-138] Image Pymol Jmol Links: PDB, SCOP, CATH

Phenylacetic acid degradation-related protein ; ligands: ACT,GOL ; X-RAY DIFFRACTION 2.15Å

e3f1tA1[A:4-139] Image Pymol Jmol Links: PDB, SCOP, CATH

uncharacterized protein Q9I3C8_PSEAE ; ligands: MG ; X-RAY DIFFRACTION 2.20Å

e3f1tD1[D:4-139] Image Pymol Jmol Links: PDB, SCOP, CATH

uncharacterized protein Q9I3C8_PSEAE ; ligands: MG ; X-RAY DIFFRACTION 2.20Å

e3f1tC1[C:5-139] Image Pymol Jmol Links: PDB, SCOP, CATH

uncharacterized protein Q9I3C8_PSEAE ; ligands: MG ; X-RAY DIFFRACTION 2.20Å

e3e29A1[A:1-134] Image Pymol Jmol Links: PDB, SCOP, CATH

uncharacterized protein Q7WE92_BORBR ; X-RAY DIFFRACTION 2.4Å

e3e29C1[C:2-134] Image Pymol Jmol Links: PDB, SCOP, CATH

uncharacterized protein Q7WE92_BORBR ; X-RAY DIFFRACTION 2.4Å

e3e29D1[D:3-134] Image Pymol Jmol Links: PDB, SCOP, CATH

uncharacterized protein Q7WE92_BORBR ; X-RAY DIFFRACTION 2.4Å

e3gekC1[C:1-134] Image Pymol Jmol Links: PDB, SCOP, CATH

Putative thioesterase yhdA ; X-RAY DIFFRACTION 2.24Å

e3gekB1[B:1-133] Image Pymol Jmol Links: PDB, SCOP, CATH

Putative thioesterase yhdA ; X-RAY DIFFRACTION 2.24Å

e3gekD1[D:1-131] Image Pymol Jmol Links: PDB, SCOP, CATH

Putative thioesterase yhdA ; X-RAY DIFFRACTION 2.24Å

e1psuB1[B:1-131] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Phenylacetic acid degradation protein PaaI ; X-RAY DIFFRACTION 1.90Å

e2fs2B1[B:1-131] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Phenylacetic acid degradation protein paaI ; ligands: SO4 ; X-RAY DIFFRACTION 2.000Å

e3hduC1[C:6-156] Image Pymol Jmol Links: PDB, SCOP, CATH

putative thioesterase ; X-RAY DIFFRACTION 2.50Å

e3hduB1[B:9-156] Image Pymol Jmol Links: PDB, SCOP, CATH

putative thioesterase ; X-RAY DIFFRACTION 2.50Å

e2prxB1[B:6-151] Image Pymol Jmol Links: PDB, SCOP, CATH

Thioesterase superfamily protein ; X-RAY DIFFRACTION 1.500Å

e1vh9B1[B:0-137] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HYPOTHETICAL PROTEIN YBDB ; X-RAY DIFFRACTION 2.15Å

e1zkiB1[B:5-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

hypothetical protein PA5202 ; ligands: ACY ; X-RAY DIFFRACTION 1.7Å

e3s4kB1[B:15-140] Image Pymol Jmol Links: PDB, SCOP, CATH

Putative esterase Rv1847/MT1895 ; ligands: CL,EDO,SO4 ; X-RAY DIFFRACTION 1.700Å

e3dkzB1[B:39-162] Image Pymol Jmol Links: PDB, SCOP, CATH

THIOESTERASE SUPERFAMILY PROTEIN ; X-RAY DIFFRACTION 2.4Å

e4a0yB1[B:72-189] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TRANSCRIPTION FACTOR FAPR ; ligands: CL ; X-RAY DIFFRACTION 2.6Å

e4a0zB1[B:52-189] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TRANSCRIPTION FACTOR FAPR ; ligands: MLC ; X-RAY DIFFRACTION 1.9Å

e2ov9C2[C:75-211] Image Pymol Jmol Links: PDB, SCOP, CATH

HYPOTHETICAL PROTEIN ; ligands: SO4 ; X-RAY DIFFRACTION 1.9Å

e2ov9B3[B:75-209] Image Pymol Jmol Links: PDB, SCOP, CATH

HYPOTHETICAL PROTEIN ; X-RAY DIFFRACTION 1.9Å

e2f41B1[B:73-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Transcription factor fapR ; X-RAY DIFFRACTION 2.50Å

e2f41C1[C:73-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Transcription factor fapR ; X-RAY DIFFRACTION 2.50Å

e2f41D1[D:73-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Transcription factor fapR ; X-RAY DIFFRACTION 2.50Å

e2ov9D3[D:75-208] Image Pymol Jmol Links: PDB, SCOP, CATH

HYPOTHETICAL PROTEIN ; X-RAY DIFFRACTION 1.9Å

e3r32A2[A:11-151] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

4-HYDROXYBENZOYL-COA THIOESTERASE ; ligands: 4CO ; X-RAY DIFFRACTION 1.8Å

e3teaA2[A:12-151] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

4-hydroxybenzoyl-CoA thioesterase ; ligands: 4CO ; X-RAY DIFFRACTION 1.8Å

e3r32B2[B:12-151] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

4-HYDROXYBENZOYL-COA THIOESTERASE ; ligands: 4CO ; X-RAY DIFFRACTION 1.8Å

e3r37A2[A:12-151] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

4-hydroxybenzoyl-CoA thioesterase ; ligands: 4CO ; X-RAY DIFFRACTION 1.80Å

e3r35A2[A:11-151] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

4-HYDROXYBENZOYL-COA THIOESTERASE ; ligands: 4CO ; X-RAY DIFFRACTION 1.8Å

e3r3fA2[A:12-151] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

4-hydroxybenzoyl-CoA thioesterase ; ligands: 4CO ; X-RAY DIFFRACTION 1.75Å

e3r37B2[B:12-151] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

4-hydroxybenzoyl-CoA thioesterase ; ligands: 4CO ; X-RAY DIFFRACTION 1.80Å

e3r35B2[B:12-151] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

4-HYDROXYBENZOYL-COA THIOESTERASE ; ligands: 4CO ; X-RAY DIFFRACTION 1.8Å

e3r34B2[B:12-151] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

4-hydroxybenzoyl-CoA thioesterase ; ligands: COA,EDO ; X-RAY DIFFRACTION 1.80Å

e3r3dB2[B:12-151] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

4-hydroxybenzoyl-CoA thioesterase ; ligands: 4CO ; X-RAY DIFFRACTION 1.75Å

e3r36B2[B:12-151] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

4-hydroxybenzoyl-CoA thioesterase ; ligands: PHB ; X-RAY DIFFRACTION 1.95Å

e3r3aB2[B:12-151] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

4-hydroxybenzoyl-CoA thioesterase ; ligands: COA,PHB ; X-RAY DIFFRACTION 1.80Å

e3r3cA2[A:12-151] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

4-hydroxybenzoyl-CoA thioesterase ; ligands: 4CO ; X-RAY DIFFRACTION 1.8Å

e3r3aA2[A:11-151] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

4-hydroxybenzoyl-CoA thioesterase ; ligands: COA,PHB ; X-RAY DIFFRACTION 1.80Å

e3r3cB2[B:12-151] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

4-hydroxybenzoyl-CoA thioesterase ; ligands: 4CO ; X-RAY DIFFRACTION 1.8Å

e3r3fB2[B:12-151] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

4-hydroxybenzoyl-CoA thioesterase ; ligands: 4CO ; X-RAY DIFFRACTION 1.75Å

e3r3bB2[B:12-151] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

4-hydroxybenzoyl-CoA thioesterase ; ligands: 4CO ; X-RAY DIFFRACTION 1.80Å

e3r3dA2[A:12-151] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

4-hydroxybenzoyl-CoA thioesterase ; ligands: 4CO ; X-RAY DIFFRACTION 1.75Å

e3r36A2[A:11-151] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

4-hydroxybenzoyl-CoA thioesterase ; ligands: PHB ; X-RAY DIFFRACTION 1.95Å

e3r34A2[A:11-151] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

4-hydroxybenzoyl-CoA thioesterase ; ligands: COA,EDO ; X-RAY DIFFRACTION 1.80Å

e3teaB2[B:12-151] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

4-hydroxybenzoyl-CoA thioesterase ; ligands: 4CO ; X-RAY DIFFRACTION 1.8Å

e3r3bA2[A:11-151] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

4-hydroxybenzoyl-CoA thioesterase ; ligands: 4CO ; X-RAY DIFFRACTION 1.80Å

e4a12A1[A:77-190] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TRANSCRIPTION FACTOR FAPR ; X-RAY DIFFRACTION 3.15Å

e4a12D1[D:77-190] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TRANSCRIPTION FACTOR FAPR ; X-RAY DIFFRACTION 3.15Å

e4a0zA1[A:59-189] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TRANSCRIPTION FACTOR FAPR ; ligands: MLC ; X-RAY DIFFRACTION 1.9Å

e4a0yA1[A:59-189] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TRANSCRIPTION FACTOR FAPR ; ligands: CL ; X-RAY DIFFRACTION 2.6Å

e4k02B2[B:10-136] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

1,4-dihydroxy-2-naphthoyl-CoA thioesterase ; X-RAY DIFFRACTION 1.90Å

e3nwzB3[B:17-167] Image Pymol Jmol Links: PDB, SCOP, CATH

BH2602 PROTEIN ; ligands: COA,SO4 ; X-RAY DIFFRACTION 2.57Å

e4i82B2[B:5-125] Image Pymol Jmol Links: PDB, SCOP, CATH

Putative uncharacterized protein ; X-RAY DIFFRACTION 2.49Å

e4m20B1[B:3-123] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Uncharacterized protein ; ligands: COA ; X-RAY DIFFRACTION 2.00Å

e4m20C1[C:3-123] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Uncharacterized protein ; ligands: COA ; X-RAY DIFFRACTION 2.00Å

e4m20D1[D:3-122] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Uncharacterized protein ; ligands: COA ; X-RAY DIFFRACTION 2.00Å

e4k49C1[C:1-136] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Esterase YdiI ; ligands: HFQ ; X-RAY DIFFRACTION 1.89Å

e4k49B1[B:1-136] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Esterase YdiI ; ligands: HFQ ; X-RAY DIFFRACTION 1.89Å

e4k49D1[D:1-136] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Esterase YdiI ; ligands: HFQ ; X-RAY DIFFRACTION 1.89Å

e4k49A1[A:1-136] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Esterase YdiI ; ligands: HFQ ; X-RAY DIFFRACTION 1.89Å

e4k4aA1[A:1-136] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Esterase YdiI ; ligands: 0FQ ; X-RAY DIFFRACTION 1.89Å

e4k4aB1[B:1-136] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Esterase YdiI ; ligands: 0FQ ; X-RAY DIFFRACTION 1.89Å

e4k4aC1[C:1-136] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Esterase YdiI ; ligands: 0FQ ; X-RAY DIFFRACTION 1.89Å

e4k4aD1[D:1-136] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Esterase YdiI ; ligands: 0FQ ; X-RAY DIFFRACTION 1.89Å

e4k4bA1[A:1-136] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Esterase YdiI ; ligands: CL,UOQ ; X-RAY DIFFRACTION 1.9Å

e4k4bB1[B:1-136] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Esterase YdiI ; ligands: UOQ ; X-RAY DIFFRACTION 1.9Å

e4k4bC1[C:1-136] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Esterase YdiI ; ligands: UOQ ; X-RAY DIFFRACTION 1.9Å

e4k4bD1[D:1-136] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Esterase YdiI ; ligands: UOQ ; X-RAY DIFFRACTION 1.9Å

e4k4bE1[E:1-136] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Esterase YdiI ; ligands: CL,UOQ ; X-RAY DIFFRACTION 1.9Å

e4k4bF1[F:1-136] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Esterase YdiI ; ligands: UOQ ; X-RAY DIFFRACTION 1.9Å

e4k4bG1[G:1-136] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Esterase YdiI ; ligands: UOQ ; X-RAY DIFFRACTION 1.9Å

e4k4bH1[H:1-136] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Esterase YdiI ; ligands: UOQ ; X-RAY DIFFRACTION 1.9Å

e4k4cA1[A:1-137] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proofreading thioesterase EntH ; ligands: 0FQ ; X-RAY DIFFRACTION 1.85Å

e4k4cB1[B:1-137] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proofreading thioesterase EntH ; ligands: 0FQ ; X-RAY DIFFRACTION 1.85Å

e4k4cC1[C:1-137] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proofreading thioesterase EntH ; ligands: 0FQ ; X-RAY DIFFRACTION 1.85Å

e4k4cD1[D:1-137] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proofreading thioesterase EntH ; ligands: 0FQ ; X-RAY DIFFRACTION 1.85Å

e4k4dA1[A:1-137] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proofreading thioesterase EntH ; ligands: ACT,HFQ,MLI ; X-RAY DIFFRACTION 2.170Å

e4k4dB1[B:1-137] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Proofreading thioesterase EntH ; ligands: ACT,HFQ ; X-RAY DIFFRACTION 2.170Å

e4a12B3[B:52-190] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TRANSCRIPTION FACTOR FAPR ; X-RAY DIFFRACTION 3.15Å

e4a12C2[C:52-190] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TRANSCRIPTION FACTOR FAPR ; X-RAY DIFFRACTION 3.15Å

Next

e1wluA1[A:2-117] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

phenylacetic acid degradation protein PaaI ; ligands: CL,GOL ; X-RAY DIFFRACTION 1.45Å

e1q4uA1[A:11-150] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Thioesterase ; ligands: 4CA,EDO ; X-RAY DIFFRACTION 1.60Å

e1vpmA1[A:2-156] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH

acyl-CoA hydrolase ; ligands: COA ; X-RAY DIFFRACTION 1.660Å

e1s5uA1[A:4-132] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH

Protein ybgC ; ligands: EDO,SO4 ; X-RAY DIFFRACTION 1.7Å

e1zkiA1[A:4-129] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

hypothetical protein PA5202 ; X-RAY DIFFRACTION 1.7Å

e2hboA1[A:12-153] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH

Hypothetical protein (np_422103.1) ; ligands: EDO,PE4 ; X-RAY DIFFRACTION 1.850Å

e1yliA1[A:11-152] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH

Putative acyl-CoA thioester hydrolase HI0827 ; ligands: CA,COA ; X-RAY DIFFRACTION 1.9Å

e2ov9A3[A:75-209] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH

HYPOTHETICAL PROTEIN ; X-RAY DIFFRACTION 1.9Å

e1ixlA1[A:1-130] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HYPOTHETICAL PROTEIN PH1136 ; X-RAY DIFFRACTION 1.94Å

e2fs2A1[A:1-131] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Phenylacetic acid degradation protein paaI ; ligands: SO4 ; X-RAY DIFFRACTION 2.000Å

e2f0xA1[A:3-138] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Thioesterase superfamily member 2 ; ligands: SO4 ; X-RAY DIFFRACTION 2.30Å

e2f41A1[A:73-183] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Transcription factor fapR ; X-RAY DIFFRACTION 2.50Å

e2gvhA1[A:9-143] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH

AGR_L_2016p ; X-RAY DIFFRACTION 2.500Å

e2gvhA2[A:147-262] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH

AGR_L_2016p ; ligands: NA ; X-RAY DIFFRACTION 2.500Å

e3nwzA1[A:10-164] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH

BH2602 PROTEIN ; X-RAY DIFFRACTION 2.57Å

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.

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