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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

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

X: Zincin-like
H: beta-N-acetylhexosaminidase-like domain
T: beta-N-acetylhexosaminidase-like domain
F: Glycohydro_20b2

PF14845 CL0546

Representatives:

e1nowA2[A:55-199] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BETA-HEXOSAMINIDASE BETA CHAIN ; ligands: GOL ; X-RAY DIFFRACTION 2.2Å

e1np0A2[A:55-199] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-hexosaminidase subunit beta ; ligands: GOL ; X-RAY DIFFRACTION 2.5Å

e2gk1B2[B:55-199] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-hexosaminidase subunit beta ; X-RAY DIFFRACTION 3.250Å

e1o7aE2[E:55-199] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BETA-HEXOSAMINIDASE BETA CHAIN ; ligands: EDO,NAG ; X-RAY DIFFRACTION 2.250Å

e1np0B2[B:55-199] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-hexosaminidase subunit beta ; X-RAY DIFFRACTION 2.5Å

e1nouB2[B:55-199] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BETA-HEXOSAMINIDASE BETA CHAIN ; X-RAY DIFFRACTION 2.4Å

e1o7aD2[D:55-199] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BETA-HEXOSAMINIDASE BETA CHAIN ; ligands: EDO,NAG ; X-RAY DIFFRACTION 2.250Å

e1o7aB2[B:55-199] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BETA-HEXOSAMINIDASE BETA CHAIN ; ligands: EDO,NAG ; X-RAY DIFFRACTION 2.250Å

e1o7aA2[A:55-199] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BETA-HEXOSAMINIDASE BETA CHAIN ; ligands: EDO,NAG ; X-RAY DIFFRACTION 2.250Å

e2gk1H2[H:55-199] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-hexosaminidase subunit beta ; X-RAY DIFFRACTION 3.250Å

e1o7aC2[C:55-199] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BETA-HEXOSAMINIDASE BETA CHAIN ; ligands: NAG ; X-RAY DIFFRACTION 2.250Å

e2gk1D2[D:55-199] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-hexosaminidase subunit beta ; X-RAY DIFFRACTION 3.250Å

e1nouA2[A:55-199] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BETA-HEXOSAMINIDASE BETA CHAIN ; ligands: GOL ; X-RAY DIFFRACTION 2.4Å

e1o7aF2[F:55-199] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BETA-HEXOSAMINIDASE BETA CHAIN ; ligands: EDO,NAG ; X-RAY DIFFRACTION 2.250Å

e2gjxG2[G:55-199] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-hexosaminidase beta chain ; ligands: NAG ; X-RAY DIFFRACTION 2.800Å

e2gjxF2[F:55-199] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-hexosaminidase beta chain ; ligands: NAG ; X-RAY DIFFRACTION 2.800Å

e2gk1F2[F:55-199] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-hexosaminidase subunit beta ; X-RAY DIFFRACTION 3.250Å

e2gjxC2[C:55-199] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-hexosaminidase beta chain ; ligands: NAG ; X-RAY DIFFRACTION 2.800Å

e1nowB2[B:55-199] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BETA-HEXOSAMINIDASE BETA CHAIN ; X-RAY DIFFRACTION 2.2Å

e2gjxB2[B:55-199] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-hexosaminidase beta chain ; X-RAY DIFFRACTION 2.800Å

e2gk1E2[E:23-166] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-hexosaminidase subunit alpha ; X-RAY DIFFRACTION 3.250Å

e2gjxH2[H:23-166] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-hexosaminidase alpha chain ; ligands: NAG ; X-RAY DIFFRACTION 2.800Å

e2gk1C2[C:23-166] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-hexosaminidase subunit alpha ; X-RAY DIFFRACTION 3.250Å

e2gjxD2[D:23-166] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-hexosaminidase alpha chain ; ligands: NAG ; X-RAY DIFFRACTION 2.800Å

e2gk1A2[A:23-166] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-hexosaminidase subunit alpha ; X-RAY DIFFRACTION 3.250Å

e2gjxE2[E:23-166] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-hexosaminidase alpha chain ; ligands: NAG ; X-RAY DIFFRACTION 2.800Å

e2gk1G2[G:23-166] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-hexosaminidase subunit alpha ; X-RAY DIFFRACTION 3.250Å

e3lmyB2[B:54-199] Image Pymol Jmol Links: PDB, SCOP, CATH

BETA-HEXOSAMINIDASE SUBUNIT BETA ; ligands: NAG,NDG ; X-RAY DIFFRACTION 2.8Å

e3vtrA2[A:23-208] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

N-ACETYLGLUCOSAMINIDASE ; ligands: NAG ; X-RAY DIFFRACTION 2.5Å

e3nsmA2[A:23-208] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

N-ACETYLGLUCOSAMINIDASE ; X-RAY DIFFRACTION 2.1Å

e3nsnA2[A:23-208] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

N-ACETYLGLUCOSAMINIDASE ; X-RAY DIFFRACTION 2.1Å

e3ozpA2[A:23-208] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

N-ACETYLGLUCOSAMINIDASE ; X-RAY DIFFRACTION 2.0Å

e3ozoA2[A:23-208] Image Pymol Jmol Links: PDB, SCOP, CATH

N-ACETYLGLUCOSAMINIDASE ; X-RAY DIFFRACTION 2.0Å

e3s6tA2[A:20-208] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

N-ACETYLGLUCOSAMINIDASE ; X-RAY DIFFRACTION 2.3Å

e3wmbA1[A:23-208] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-hexosaminidase ; ligands: NAG ; X-RAY DIFFRACTION 2.7Å

e3wmcA1[A:23-208] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-hexosaminidase ; ligands: NAG ; X-RAY DIFFRACTION 2.095Å

e5broA1[A:53-199] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-hexosaminidase subunit beta ; ligands: FMT,NAG ; X-RAY DIFFRACTION 2.40Å

e5y0vA1[A:23-208] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-hexosaminidase ; ligands: NAG ; X-RAY DIFFRACTION 2.420Å

e5y1bA2[A:23-208] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-hexosaminidase ; ligands: NAG ; X-RAY DIFFRACTION 2.207Å

e3lmyA1[A:54-199] Image Pymol Jmol Links: PDB, SCOP, CATH

BETA-HEXOSAMINIDASE SUBUNIT BETA ; ligands: NAG,NDG ; X-RAY DIFFRACTION 2.8Å

e2gjxA2[A:23-166] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-hexosaminidase alpha chain ; ligands: NAG ; X-RAY DIFFRACTION 2.800Å

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.

few secondary structure elementsstabilized by cofactors or disulfides

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