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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

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

X: Thiolase-like
H: Thiolase-like
T: Thiolase-like
F: Ketoacyl-synt_C

PF02801 CL0046

Representatives:

e1ox0A2[A:252-409] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta ketoacyl-acyl carrier protein synthase ; ligands: MG ; X-RAY DIFFRACTION 1.3Å

e3kzuA2[A:257-420] Image Pymol Jmol Links: PDB, SCOP, CATH

3-OXOACYL-(ACYL-CARRIER-PROTEIN) SYNTHASE II ; ligands: EDO ; X-RAY DIFFRACTION 1.75Å

e3kzuB2[B:257-420] Image Pymol Jmol Links: PDB, SCOP, CATH

3-OXOACYL-(ACYL-CARRIER-PROTEIN) SYNTHASE II ; ligands: EDO ; X-RAY DIFFRACTION 1.75Å

e3kzuC2[C:257-420] Image Pymol Jmol Links: PDB, SCOP, CATH

3-OXOACYL-(ACYL-CARRIER-PROTEIN) SYNTHASE II ; X-RAY DIFFRACTION 1.75Å

e6p9kA1[A:260-416] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

3-oxoacyl-ACP synthase ; ligands: IPA,NA,O6G ; X-RAY DIFFRACTION 1.700Å

e6y2jAAA2[AAA:260-416] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

3-oxoacyl-[acyl-carrier-protein] synthase 1 ; ligands: NA,O6W ; X-RAY DIFFRACTION 2.886Å

e6p9lA1[A:260-416] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

3-oxoacyl-[acyl-carrier-protein] synthase 1 ; ligands: GOL,IPA,JFX,NA ; X-RAY DIFFRACTION 2.300Å

e6p9mA1[A:260-416] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

3-oxoacyl-[acyl-carrier-protein] synthase 1 ; ligands: GOL,IPA,NA,O6J ; X-RAY DIFFRACTION 2.250Å

e6y2iAAA1[AAA:260-416] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

3-oxoacyl-[acyl-carrier-protein] synthase 1 ; ligands: EDO,NA,O6Z ; X-RAY DIFFRACTION 1.53Å

e6y2iBBB1[BBB:260-416] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

3-oxoacyl-[acyl-carrier-protein] synthase 1 ; ligands: EDO,NA,O6Z ; X-RAY DIFFRACTION 1.53Å

e6y2jBBB1[BBB:260-416] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

3-oxoacyl-[acyl-carrier-protein] synthase 1 ; ligands: NA,O6W ; X-RAY DIFFRACTION 2.886Å

e6y2jCCC1[CCC:260-416] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

3-oxoacyl-[acyl-carrier-protein] synthase 1 ; ligands: NA,O6W ; X-RAY DIFFRACTION 2.886Å

e6y2jDDD1[DDD:260-416] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

3-oxoacyl-[acyl-carrier-protein] synthase 1 ; ligands: NA,O6W ; X-RAY DIFFRACTION 2.886Å

e6y2jEEE1[EEE:260-416] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

3-oxoacyl-[acyl-carrier-protein] synthase 1 ; ligands: NA,O6W ; X-RAY DIFFRACTION 2.886Å

e6y2jFFF2[FFF:260-416] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

3-oxoacyl-[acyl-carrier-protein] synthase 1 ; ligands: NA,O6W ; X-RAY DIFFRACTION 2.886Å

e6y2jGGG1[GGG:260-416] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

3-oxoacyl-[acyl-carrier-protein] synthase 1 ; ligands: NA,O6W ; X-RAY DIFFRACTION 2.886Å

e6y2jHHH1[HHH:260-416] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

3-oxoacyl-[acyl-carrier-protein] synthase 1 ; ligands: NA,O6W ; X-RAY DIFFRACTION 2.886Å

e6okgA2[A:252-412] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

3-oxoacyl-[acyl-carrier-protein] synthase 2 ; ligands: MU4,NA ; X-RAY DIFFRACTION 2.300Å

e6oltA2[A:252-412] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

3-oxoacyl-[acyl-carrier-protein] synthase 2 ; ligands: MRJ ; X-RAY DIFFRACTION 2.350Å

e6kxfA1[A:252-408] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Ketosynthase ; ligands: DYF ; X-RAY DIFFRACTION 1.98Å

e6smoB2[B:227-425] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PKS_KS domain-containing protein ; ligands: LKZ ; X-RAY DIFFRACTION 2.7Å

e6smoD1[D:226-427] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PKS_KS domain-containing protein ; ligands: LKZ,NA ; X-RAY DIFFRACTION 2.7Å

e6smoF1[F:226-426] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PKS_KS domain-containing protein ; ligands: LKZ ; X-RAY DIFFRACTION 2.7Å

e6smpB2[B:227-426] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PKS_KS domain-containing protein ; ligands: LLE ; X-RAY DIFFRACTION 2.9Å

e6smpE1[E:226-426] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PKS_KS domain-containing protein ; ligands: LLE ; X-RAY DIFFRACTION 2.9Å

e6smpH1[H:226-427] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PKS_KS domain-containing protein ; ligands: LLE ; X-RAY DIFFRACTION 2.9Å

e6smpK2[K:227-426] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PKS_KS domain-containing protein ; ligands: LLE ; X-RAY DIFFRACTION 2.9Å

e6kxdA2[A:252-407] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Ketosynthase ; X-RAY DIFFRACTION 1.75Å

e6kxeA2[A:252-407] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Ketosynthase ; ligands: ACT,PPI ; X-RAY DIFFRACTION 1.81Å

e7oc0A2[A:255-413] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

3-oxoacyl-[acyl-carrier-protein] synthase 2 ; ligands: DMS,MG,V7W ; X-RAY DIFFRACTION 1.78Å

e4jgaA2[A:269-428] Image Pymol Jmol Links: PDB, SCOP, CATH

3-OXOACYL-[ACYL-CARRIER-PROTEIN] SYNTHASE 2 ; ligands: K,NA ; X-RAY DIFFRACTION 2.1Å

e7l4lA2[A:254-412] Image Pymol Jmol Links: PDB, SCOP, CATHDOI

3-oxoacyl-[acyl-carrier-protein] synthase 2 ; ligands: DYF,NA ; X-RAY DIFFRACTION 2.650Å

e7l4lB2[B:254-412] Image Pymol Jmol Links: PDB, SCOP, CATHDOI

3-oxoacyl-[acyl-carrier-protein] synthase 2 ; ligands: DYF,NA ; X-RAY DIFFRACTION 2.650Å

e7oc0B2[B:255-413] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

3-oxoacyl-[acyl-carrier-protein] synthase 2 ; ligands: V7W ; X-RAY DIFFRACTION 1.78Å

e7oc1A2[A:255-413] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

3-oxoacyl-[acyl-carrier-protein] synthase 2 ; ligands: DMS,K,PMN ; X-RAY DIFFRACTION 1.8Å

e7oc1B2[B:255-413] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

3-oxoacyl-[acyl-carrier-protein] synthase 2 ; ligands: DMS,GOL,PMN ; X-RAY DIFFRACTION 1.8Å

e7l4eA2[A:254-412] Image Pymol Jmol Links: PDB, SCOP, CATHDOI

3-oxoacyl-[acyl-carrier-protein] synthase 2 ; ligands: EDO,MU4 ; X-RAY DIFFRACTION 2.000Å

e7s2xA2[A:267-433] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

SalC ; X-RAY DIFFRACTION 2.85Å

e7s2xB1[B:267-434] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

SalC ; ligands: K ; X-RAY DIFFRACTION 2.85Å

e7s2xC2[C:267-434] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

SalC ; X-RAY DIFFRACTION 2.85Å

e7s2xD1[D:267-434] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

SalC ; ligands: K ; X-RAY DIFFRACTION 2.85Å

e7f27A1[A:251-408] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

3-oxoacyl-(Acyl-carrier-protein) synthase ; X-RAY DIFFRACTION 1.8060Å

e7f27B2[B:251-408] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

3-oxoacyl-(Acyl-carrier-protein) synthase ; X-RAY DIFFRACTION 1.8060Å

e7f27C1[C:251-408] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

3-oxoacyl-(Acyl-carrier-protein) synthase ; X-RAY DIFFRACTION 1.8060Å

e7f27D2[D:251-408] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

3-oxoacyl-(Acyl-carrier-protein) synthase ; X-RAY DIFFRACTION 1.8060Å

e2vbaA2[A:254-404] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

3-OXOACYL-[ACYL-CARRIER-PROTEIN] SYNTHASE 1 ; ligands: P4T ; X-RAY DIFFRACTION 1.36Å

e1tqyB2[B:210-403] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Actinorhodin polyketide putative beta-ketoacyl synthase 2 ; X-RAY DIFFRACTION 2.00Å

e4kc5A2[A:3315-3496] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RhiE protein ; X-RAY DIFFRACTION 2.14Å

e2pffA2[A:1399-1744] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

FATTY ACID SYNTHASE SUBUNIT ALPHA ; X-RAY DIFFRACTION 4.0Å

e3hmjA5[A:1399-1745] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

FATTY ACID SYNTHASE SUBUNIT ALPHA ; ligands: CER ; X-RAY DIFFRACTION 4.0Å

e3zenD13[D:2834-3089] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH Obsolete PDB

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.

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