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: Rossmann-like

X: C-terminal domain in CAC2185-like proteins

X: P-loop domains-like

X: EreA/ChaN-like

X: HUP domain-like

X: HAD domain-like

X: Flavodoxin-like

X: Nucleic acid-binding domain of nonstructural protein 3

X: EDD domain

X: Phosphorylase/hydrolase-like

X: LigB-like

X: Other Rossmann-like structures with the crossover

X: N-terminal domain in NTD biosynthesis operon protein NtdA

X: Flavivirus non-structural protein 1 (NS1) a/b domain

X: STT3/PglB/AglB core domain

X: C-terminal domain in arabinosyltransferase C

X: Nqo1 FMN-binding domain-like

X: beta-carbonic anhydrase-like

X: a/b domain in QueA-like proteins (Pfam 02547)

X: a/b domain in AF0625-like proteins

X: CbiG linker domain

X: CobE/CbiG C-terminal domain-like

X: a/b domain in CV3147-like proteins

X: alpha/beta knot

X: Peptidyl-tRNA hydrolase II

X: Subtilisin-like

X: Insert domain in hypothetical protein PF0380

X: a/b domain in flagellar biosynthesis protein flhA

X: a/b domain in family 98 glycoside hydrolases

X: UPF0302 protein BA_1542/GBAA1542/BAS1430

X: Cellulose Synthase Subunit B a/b domain

X: Core protein P7

X: Type III R-M system modification subunit C-terminal domain

X: Restriction endonuclease-like

X: ClpP/crotonase

X: The "swivelling" beta/beta/alpha domains

X: Barstar (barnase inhibitor)

X: Ribosomal protein L13/L15p/L18e/L32e

X: C-terminal subdomain in Lon-related proteases catalytic domains

X: Atg7 N-terminal domain-like

X: MurF and HprK N-domain-like

X: DTD-like

X: Cell-division inhibitor MinC, N-terminal domain

X: CRISPR-associated Csx3

X: SpoIIaa-like

X: Small protrusion domain in cytoplasmic polyhedrosis virus capsid shell protein

X: Polycomb protein Eed insertion domain

X: HSP90 C-terminal a/b domain

X: STING C-terminal domain

X: C-terminal domain of poxin

X: Glycerate kinase I (Pfam 02595) domain II

X: Dihydrofolate reductases

X: Anticodon-binding domain of Class II aaRS

X: TolB, N-terminal domain

X: ITPase-like

X: Kinesin-like protein KIF23 C-terminal domain

X: N-terminal domain of GerK3 germinant receptor

X: Glutaminase/Asparaginase C-terminal domain

X: O-glucosyltransferase rumi N-terminal domain

X: NIF3 (NGG1p interacting factor 3)-like

X: Isocitrate/Isopropylmalate dehydrogenase-like

X: Single-stranded-DNA-specific exonuclease RecJ C-terminal domain

X: UDP-Glycosyltransferase/glycogen phosphorylase

H: UDP-Glycosyltransferase/glycogen phosphorylase

T: UDP-Glycosyltransferase/glycogen phosphorylase

F: XG_FTase

F: O-FucT

F: Glyco_transf_5

F: Glyco_transf_52

F: MGDG_synth

F: PS_pyruv_trans

F: LpxB

F: Epimerase_2

F: Glyco_transf_9

F: Glyco_transf_10

F: PM0188

F: AGT

F: Glycos_transf_N

F: Glyco_transf_28

F: Glyco_transf_20

F: Glyco_transf_90

F: Sucrose_synth

F: FUT8_N_cat

F: FucT_N

F: Glyco_trans_1_4

F: Glyco_transf_4

F: A-2_8-polyST

F: Capsule_synth

F: Glyco_tran_28_C

F: Glycos_transf_1

F: UDPGT

F: Glyco_transf_41

F: WsaF_N

F: TreT_GT1

F: Glyco_trans_4_4

Representatives:

e3c48A1[A:-1-195] * nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Predicted glycosyltransferases ; ligands: SO4 ; X-RAY DIFFRACTION 2.1Å

e3c48B1[B:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Predicted glycosyltransferases ; ligands: SO4 ; X-RAY DIFFRACTION 2.1Å

e3c4qA2[A:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PREDICTED GLYCOSYLTRANSFERASES ; ligands: SO4,UDP ; X-RAY DIFFRACTION 2.8Å

e3c4qB2[B:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PREDICTED GLYCOSYLTRANSFERASES ; ligands: SO4,UDP ; X-RAY DIFFRACTION 2.8Å

e3c4vA2[A:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PREDICTED GLYCOSYLTRANSFERASES ; ligands: UDP ; X-RAY DIFFRACTION 2.6Å

e3c4vB1[B:1-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PREDICTED GLYCOSYLTRANSFERASES ; ligands: LIP,UDP ; X-RAY DIFFRACTION 2.6Å

e4xsrB2[B:0-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Alr3699 protein ; ligands: EPE,SO4,UPG ; X-RAY DIFFRACTION 2.39Å

e6kihA1[A:27-218] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI