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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

X: jelly-roll
H: Galactose-binding domain-like
T: Galactose-binding domain-like
F: Glyco_hydro_2_N2

PF22666

Representatives:

e2je8A1[A:28-219] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BETA-MANNOSIDASE ; ligands: B3P,CL ; X-RAY DIFFRACTION 1.7Å

e2vqtB1[B:28-219] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BETA-MANNOSIDASE ; ligands: 15A,BR,CL,EDO ; X-RAY DIFFRACTION 2.1Å

e2vo5B1[B:28-219] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BETA-MANNOSIDASE ; ligands: BR,CL,EDO,VBZ ; X-RAY DIFFRACTION 2.3Å

e2vl4A1[A:28-219] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BETA-MANNOSIDASE ; ligands: BR,CL,EDO,MNM ; X-RAY DIFFRACTION 1.90Å

e2vl4B1[B:28-219] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BETA-MANNOSIDASE ; ligands: BR,EDO,MNM ; X-RAY DIFFRACTION 1.90Å

e2vmfA1[A:28-219] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BETA-MANNOSIDASE ; ligands: BR,CL,EDO,MVL ; X-RAY DIFFRACTION 2.10Å

e2vr4B1[B:28-219] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BETA-MANNOSIDASE ; ligands: 17B,BR,CL,EDO ; X-RAY DIFFRACTION 1.8Å

e2votB1[B:28-219] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BETA-MANNOSIDASE ; ligands: BR,CL,EDO,NHV ; X-RAY DIFFRACTION 1.95Å

e2votA1[A:28-219] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BETA-MANNOSIDASE ; ligands: BR,EDO,NHV ; X-RAY DIFFRACTION 1.95Å

e2vquA1[A:28-219] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BETA-MANNOSIDASE ; ligands: BR,EDO,NOY ; X-RAY DIFFRACTION 1.9Å

e2vqtA1[A:28-219] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BETA-MANNOSIDASE ; ligands: 15A,BR,CL,EDO ; X-RAY DIFFRACTION 2.1Å

e2vjxA1[A:28-219] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BETA-MANNOSIDASE ; ligands: BR,CL,EDO,IFL ; X-RAY DIFFRACTION 1.85Å

e2je8B1[B:28-219] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BETA-MANNOSIDASE ; ligands: B3P,CL ; X-RAY DIFFRACTION 1.7Å

e2vo5A1[A:28-219] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BETA-MANNOSIDASE ; ligands: BR,EDO,VBZ ; X-RAY DIFFRACTION 2.3Å

e2vquB1[B:28-219] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BETA-MANNOSIDASE ; ligands: BR,CL,EDO,NOY ; X-RAY DIFFRACTION 1.9Å

e2vjxB1[B:28-219] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BETA-MANNOSIDASE ; ligands: BR,CL,EDO,IFL ; X-RAY DIFFRACTION 1.85Å

e2vr4A1[A:28-219] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BETA-MANNOSIDASE ; ligands: 17B,BR,EDO ; X-RAY DIFFRACTION 1.8Å

e2vmfB1[B:28-219] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BETA-MANNOSIDASE ; ligands: BR,CL,EDO,MVL ; X-RAY DIFFRACTION 2.10Å

e2vzsB1[B:42-225] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

EXO-BETA-D-GLUCOSAMINIDASE ; ligands: CD,GCS ; X-RAY DIFFRACTION 1.85Å

e2wbkA1[A:28-219] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BETA-MANNOSIDASE ; ligands: BR,CL,EDO,M2F ; X-RAY DIFFRACTION 2.1Å

e2x05A1[A:48-225] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

EXO-BETA-D-GLUCOSAMINIDASE ; ligands: CD,X05 ; X-RAY DIFFRACTION 2.3Å

e2vzoA2[A:49-225] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

EXO-BETA-D-GLUCOSAMINIDASE ; ligands: CD,GOL ; X-RAY DIFFRACTION 2.24Å

e2vzoB1[B:49-225] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

EXO-BETA-D-GLUCOSAMINIDASE ; ligands: CD,GOL ; X-RAY DIFFRACTION 2.24Å

e2vztA1[A:49-225] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

EXO-BETA-D-GLUCOSAMINIDASE ; ligands: CD,PNJ ; X-RAY DIFFRACTION 2.20Å

e2vztB1[B:49-225] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

EXO-BETA-D-GLUCOSAMINIDASE ; ligands: CD,PNJ ; X-RAY DIFFRACTION 2.20Å

e2vzuA1[A:49-225] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

EXO-BETA-D-GLUCOSAMINIDASE ; ligands: CD,PNJ ; X-RAY DIFFRACTION 2.10Å

e2vzuB1[B:49-225] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

EXO-BETA-D-GLUCOSAMINIDASE ; ligands: CD,PNJ ; X-RAY DIFFRACTION 2.10Å

e2vzvA1[A:42-225] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

EXO-BETA-D-GLUCOSAMINIDASE ; X-RAY DIFFRACTION 2.7Å

e2vzvB1[B:42-225] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

EXO-BETA-D-GLUCOSAMINIDASE ; X-RAY DIFFRACTION 2.7Å

e2wbkB1[B:27-219] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BETA-MANNOSIDASE ; ligands: BR,CL,EDO,M2F ; X-RAY DIFFRACTION 2.1Å

e2x05B1[B:48-225] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

EXO-BETA-D-GLUCOSAMINIDASE ; ligands: CD,X05 ; X-RAY DIFFRACTION 2.3Å

e2x09A1[A:49-225] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

EXO-BETA-D-GLUCOSAMINIDASE ; ligands: X09 ; X-RAY DIFFRACTION 2.4Å

e2x09B1[B:49-225] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

EXO-BETA-D-GLUCOSAMINIDASE ; ligands: X09 ; X-RAY DIFFRACTION 2.4Å

e4uojA2[A:26-224] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BETA-MANNOSIDASE GH2 ; ligands: CD,NAG,PE4 ; X-RAY DIFFRACTION 2.50Å

e4uojB2[B:26-224] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BETA-MANNOSIDASE GH2 ; ligands: CD,NAG,PE4 ; X-RAY DIFFRACTION 2.50Å

e5n6uA2[A:1-185] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-mannosidase ; ligands: BMA ; X-RAY DIFFRACTION 3.08Å

e5n6uB2[B:1-185] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-mannosidase ; ligands: BMA ; X-RAY DIFFRACTION 3.08Å

e5n6uC5[C:1-185] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-mannosidase ; ligands: BMA ; X-RAY DIFFRACTION 3.08Å

e5n6uD5[D:1-185] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-mannosidase ; ligands: BMA ; X-RAY DIFFRACTION 3.08Å

e6bygA3[A:29-235] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-mannosidase ; ligands: BMA ; X-RAY DIFFRACTION 1.99Å

e6bycA1[A:29-235] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-mannosidase ; ligands: ACT,GOL,PEG ; X-RAY DIFFRACTION 1.897Å

e6byeA1[A:29-235] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-mannosidase ; ligands: BMA ; X-RAY DIFFRACTION 2.12Å

e6byeB3[B:29-235] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-mannosidase ; ligands: ACT,BMA ; X-RAY DIFFRACTION 2.12Å

e6bygB1[B:29-235] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-mannosidase ; ligands: BMA ; X-RAY DIFFRACTION 1.99Å

e6byiA3[A:31-235] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-mannosidase ; ligands: BMA ; X-RAY DIFFRACTION 2.2Å

e6byiB3[B:31-235] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-mannosidase ; ligands: BMA ; X-RAY DIFFRACTION 2.2Å

e6ddtA5[A:18-211] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-mannosidase ; ligands: EDO,FUC,NAG ; X-RAY DIFFRACTION 2.10Å

e6dduA3[A:18-211] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-mannosidase ; ligands: BMA,EDO,FUC,NAG ; X-RAY DIFFRACTION 2.668Å

e6ncwA3[A:1-160] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-galacturonidase ; ligands: GOL ; X-RAY DIFFRACTION 2.3Å

e6ncwB2[B:1-160] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-galacturonidase ; ligands: GOL ; X-RAY DIFFRACTION 2.3Å

e6ncwC2[C:1-160] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-galacturonidase ; ligands: GOL ; X-RAY DIFFRACTION 2.3Å

e6ncwD3[D:1-160] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-galacturonidase ; ligands: GOL ; X-RAY DIFFRACTION 2.3Å

e6ncxD3[D:1-160] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-galacturonidase ; ligands: ADA ; X-RAY DIFFRACTION 2.250Å

e6ncxA2[A:1-160] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-galacturonidase ; ligands: ADA ; X-RAY DIFFRACTION 2.250Å

e6ncxB2[B:1-160] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-galacturonidase ; ligands: ADA ; X-RAY DIFFRACTION 2.250Å

e6ncxC3[C:1-160] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-galacturonidase ; ligands: ADA ; X-RAY DIFFRACTION 2.250Å

e7kgzA2[A:1-144] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-glucuronidase ; ligands: CA,GOL ; X-RAY DIFFRACTION 2.40Å

e7kgzB2[B:1-144] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-glucuronidase ; ligands: CA,GOL ; X-RAY DIFFRACTION 2.40Å

e7op7B3[B:28-219] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-mannosidase ; ligands: BR,CL,EDO,VEE ; X-RAY DIFFRACTION 1.85Å

e7op7A1[A:28-219] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-mannosidase ; ligands: BR,VEE ; X-RAY DIFFRACTION 1.85Å

e7op6A1[A:27-219] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-mannosidase ; ligands: BR,EDO,JIW,NA ; X-RAY DIFFRACTION 2.05Å

e7op6B4[B:28-219] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-mannosidase ; ligands: BR,CL,EDO,JIT,VKH ; X-RAY DIFFRACTION 2.05Å

e2vzsA1[A:42-225] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

EXO-BETA-D-GLUCOSAMINIDASE ; ligands: CD,GCS ; X-RAY DIFFRACTION 1.85Å

e5mqmA5[A:947-1102] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Glycosyl hydrolases family 2, sugar binding domain ; ligands: PGE ; X-RAY DIFFRACTION 2.11Å

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.

X: Glycosyl hydrolase domain-like

some similarity with Ig fold

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