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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: helical hairpin of HlyD-like secretion proteins
H: helical hairpin of HlyD-like secretion proteins
T: helical hairpin of HlyD-like secretion proteins
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.

Representatives:

e4l8jA1[A:89-151] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH

Putative efflux transporter ; ligands: GOL,PEG ; X-RAY DIFFRACTION 2.06Å

e5c21A2[A:131-325] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Chromosomal hemolysin D ; X-RAY DIFFRACTION 2.2Å

e1vf7A2[A:73-134] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

MULTIDRUG RESISTANCE PROTEIN MEXA ; X-RAY DIFFRACTION 2.4Å

e2f1mA5[A:98-173] * nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Acriflavine resistance protein A ; X-RAY DIFFRACTION 2.700Å

e2f1mD1[D:98-173] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Acriflavine resistance protein A ; X-RAY DIFFRACTION 2.700Å

e2f1mB3[B:98-173] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Acriflavine resistance protein A ; X-RAY DIFFRACTION 2.700Å

e2f1mC2[C:98-173] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Acriflavine resistance protein A ; X-RAY DIFFRACTION 2.700Å

e3fppB3[B:94-185] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Macrolide-specific efflux protein macA ; X-RAY DIFFRACTION 2.99Å

e3fppA2[A:94-185] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Macrolide-specific efflux protein macA ; X-RAY DIFFRACTION 2.99Å

e5ng5E4[E:98-174] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Multidrug efflux pump subunit AcrA ; ELECTRON MICROSCOPY

e5ng5D2[D:98-174] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Multidrug efflux pump subunit AcrA ; ELECTRON MICROSCOPY

e5ng5G1[G:98-174] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Multidrug efflux pump subunit AcrA ; ELECTRON MICROSCOPY

e5ng5H2[H:98-174] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Multidrug efflux pump subunit AcrA ; ELECTRON MICROSCOPY

e5ng5A1[A:98-174] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Multidrug efflux pump subunit AcrA ; ELECTRON MICROSCOPY

e5ng5B1[B:98-174] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Multidrug efflux pump subunit AcrA ; ELECTRON MICROSCOPY

e5v5sD2[D:98-174] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Multidrug efflux pump subunit AcrA ; ELECTRON MICROSCOPY

e5v5sE2[E:98-174] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Multidrug efflux pump subunit AcrA ; ELECTRON MICROSCOPY

e5v5sF2[F:98-174] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Multidrug efflux pump subunit AcrA ; ELECTRON MICROSCOPY

e5v5sG4[G:98-174] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Multidrug efflux pump subunit AcrA ; ELECTRON MICROSCOPY

e5v5sH1[H:98-174] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Multidrug efflux pump subunit AcrA ; ELECTRON MICROSCOPY

e5v5sI3[I:98-174] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Multidrug efflux pump subunit AcrA ; ELECTRON MICROSCOPY

e5v78E1[E:98-174] Image Pymol Jmol Links: PDB, SCOP, CATH

e5v78D4[D:98-174] Image Pymol Jmol Links: PDB, SCOP, CATH

e5v78G1[G:98-174] Image Pymol Jmol Links: PDB, SCOP, CATH

e5v78H2[H:98-174] Image Pymol Jmol Links: PDB, SCOP, CATH

e5v78A1[A:98-174] Image Pymol Jmol Links: PDB, SCOP, CATH

e5v78B3[B:98-174] Image Pymol Jmol Links: PDB, SCOP, CATH

e5nikD4[D:94-185] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Macrolide export protein MacA ; ELECTRON MICROSCOPY

e5nikE4[E:94-185] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Macrolide export protein MacA ; ELECTRON MICROSCOPY

e5nikF1[F:94-185] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Macrolide export protein MacA ; ELECTRON MICROSCOPY

e5nikG4[G:94-185] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Macrolide export protein MacA ; ELECTRON MICROSCOPY

e5nikH4[H:94-185] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Macrolide export protein MacA ; ELECTRON MICROSCOPY

e5nikI4[I:94-185] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Macrolide export protein MacA ; ELECTRON MICROSCOPY

e5nilD4[D:94-185] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Macrolide export protein MacA ; ELECTRON MICROSCOPY

e5nilE2[E:94-185] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Macrolide export protein MacA ; ELECTRON MICROSCOPY

e5nilF1[F:94-185] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Macrolide export protein MacA ; ELECTRON MICROSCOPY

e5nilG1[G:94-185] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Macrolide export protein MacA ; ELECTRON MICROSCOPY

e5nilH2[H:94-185] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Macrolide export protein MacA ; ELECTRON MICROSCOPY

e5nilI4[I:94-185] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Macrolide export protein MacA ; ELECTRON MICROSCOPY

e5o66D3[D:98-174] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Multidrug efflux pump subunit AcrA ; ELECTRON MICROSCOPY

e5o66E3[E:98-174] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Multidrug efflux pump subunit AcrA ; ELECTRON MICROSCOPY

e5o66F2[F:98-174] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Multidrug efflux pump subunit AcrA ; ELECTRON MICROSCOPY

e5o66G2[G:98-174] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Multidrug efflux pump subunit AcrA ; ELECTRON MICROSCOPY

e5o66H1[H:98-174] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Multidrug efflux pump subunit AcrA ; ELECTRON MICROSCOPY

e5o66I4[I:98-174] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Multidrug efflux pump subunit AcrA ; ELECTRON MICROSCOPY

e3lnnA4[A:91-165] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Membrane fusion protein (MFP) heavy metal cation efflux ZneB (CzcB-like) ; X-RAY DIFFRACTION 2.796Å

e3lnnB5[B:90-109,B:132-170] * nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Membrane fusion protein (MFP) heavy metal cation efflux ZneB (CzcB-like) ; X-RAY DIFFRACTION 2.796Å

e4tkoB3[B:77-243] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

EmrA ; X-RAY DIFFRACTION 2.85Å

e5nenB1[B:41-48,B:75-280] * nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Lipase C ; X-RAY DIFFRACTION 2.90Å

e5xu0A3[A:106-140,A:171-197] * nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Membrane-fusion protein ; X-RAY DIFFRACTION 2.95Å

e1t5eD2[D:72-133] * nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Multidrug resistance protein mexA ; X-RAY DIFFRACTION 3Å

e4dk1D4[D:90-153] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Putative MacA, Multidrug resistance protein mexA ; X-RAY DIFFRACTION 3.499Å

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