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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: F5_F8_type_C

PF00754 CL0202

Representatives:

e1k3iA1[A:-12-150] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

GALACTOSE OXIDASE PRECURSOR ; ligands: CA ; X-RAY DIFFRACTION 1.4Å

e1tvgA1[A:4-140] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

LOC51668 protein ; ligands: CA,SM ; X-RAY DIFFRACTION 1.4Å

e1d7pM1[M:2171-2329] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

COAGULATION FACTOR VIII PRECURSOR ; ligands: CYS,GOL,SO4 ; X-RAY DIFFRACTION 1.5Å

e1w8oA1[A:506-647] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BACTERIAL SIALIDASE ; ligands: LBT,NA ; X-RAY DIFFRACTION 1.7Å

e2yc2A1[A:1-134] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

INTRAFLAGELLAR TRANSPORT PROTEIN 25 ; ligands: CA ; X-RAY DIFFRACTION 2.59Å

e1wcqA1[A:506-647] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

SIALIDASE ; ligands: GOL,NA ; X-RAY DIFFRACTION 2.1Å

e1w8nA1[A:506-647] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BACTERIAL SIALIDASE ; ligands: GAL,NA ; X-RAY DIFFRACTION 2.100Å

e2yfuA1[A:1-140] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CARBOHYDRATE BINDING FAMILY 6 ; ligands: CA,GOL ; X-RAY DIFFRACTION 1.65Å

e1euuA1[A:506-647] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

SIALIDASE ; ligands: GAL,NA ; X-RAY DIFFRACTION 2.5Å

e2yb7A1[A:739-878] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CARBOHYDRATE BINDING FAMILY 6 ; ligands: CA,GOL ; X-RAY DIFFRACTION 1.70Å

e2yc2B1[B:1-134] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

INTRAFLAGELLAR TRANSPORT PROTEIN 25 ; ligands: CA ; X-RAY DIFFRACTION 2.59Å

e1wcqC1[C:506-647] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

SIALIDASE ; ligands: GOL,NA ; X-RAY DIFFRACTION 2.1Å

e2berA1[A:506-647] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BACTERIAL SIALIDASE ; ligands: NA ; X-RAY DIFFRACTION 1.8Å

e2yc4A1[A:1-135] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

INTRAFLAGELLAR TRANSPORT PROTEIN 25 ; ligands: CA ; X-RAY DIFFRACTION 2.8Å

e2yc4B1[B:2-134] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

INTRAFLAGELLAR TRANSPORT PROTEIN 25 ; ligands: CA ; X-RAY DIFFRACTION 2.8Å

e1wcqB1[B:506-647] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

SIALIDASE ; ligands: GOL,NA ; X-RAY DIFFRACTION 2.1Å

e2yfzA1[A:1-140] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CARBOHYDRATE BINDING FAMILY 6 ; ligands: CA,GOL ; X-RAY DIFFRACTION 1.8Å

e1eutA1[A:506-647] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

SIALIDASE ; ligands: NA ; X-RAY DIFFRACTION 2.5Å

e2yg0A1[A:2-140] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CARBOHYDRATE BINDING FAMILY 6 ; ligands: CA,GOL ; X-RAY DIFFRACTION 1.8Å

e1xpwA1[A:4-139] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

LOC51668 protein ; SOLUTION NMR

e3nngA1[A:186-338] Image Pymol Jmol Links: PDB, SCOP, CATH

uncharacterized protein ; ligands: CA ; X-RAY DIFFRACTION 2.177Å

e2yb7B1[B:739-878] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CARBOHYDRATE BINDING FAMILY 6 ; ligands: CA,GOL ; X-RAY DIFFRACTION 1.70Å

e2jd9A1[A:7-145] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

YECBM32 ; ligands: CA ; X-RAY DIFFRACTION 1.8Å

e4uapA1[A:3-152] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Glycosyl hydrolase, family 31/fibronectin type III domain protein ; ligands: CA,GOL,NGA ; X-RAY DIFFRACTION 2.00Å

e2bzdA1[A:506-647] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BACTERIAL SIALIDASE ; ligands: GAL,NA ; X-RAY DIFFRACTION 2.0Å

e4uapB1[B:3-151] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Glycosyl hydrolase, family 31/fibronectin type III domain protein ; ligands: CA,GOL,NGA ; X-RAY DIFFRACTION 2.00Å

e2bzdB1[B:506-647] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BACTERIAL SIALIDASE ; ligands: GAL,NA ; X-RAY DIFFRACTION 2.0Å

e2bzdC1[C:506-647] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BACTERIAL SIALIDASE ; ligands: GAL,NA ; X-RAY DIFFRACTION 2.0Å

e2jdaA1[A:7-145] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

YECBM32 ; ligands: CA,GOL,SO4 ; X-RAY DIFFRACTION 1.35Å

e2jdaB1[B:4-145] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

YECBM32 ; ligands: CA,GOL,SO4 ; X-RAY DIFFRACTION 1.35Å

e3nngB1[B:188-338] Image Pymol Jmol Links: PDB, SCOP, CATH

uncharacterized protein ; ligands: CA ; X-RAY DIFFRACTION 2.177Å

e4a42B2[B:1496-1621] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ALPHA-N-ACETYLGLUCOSAMINIDASE FAMILY PROTEIN ; ligands: CA ; X-RAY DIFFRACTION 1.55Å

e6eonA4[A:615-779] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-galactosidase ; ligands: CA ; X-RAY DIFFRACTION 1.75Å

e2qqiA1[A:431-586] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Neuropilin-1 ; ligands: GOL ; X-RAY DIFFRACTION 1.800Å

e2qqiA2[A:273-427] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Neuropilin-1 ; X-RAY DIFFRACTION 1.800Å

e4a4aA1[A:26-165] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ALPHA-N-ACETYLGLUCOSAMINIDASE FAMILY PROTEIN ; ligands: CA,SO4 ; X-RAY DIFFRACTION 1.90Å

e1sddB1[B:1863-2024] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

COAGULATION FACTOR V ; ligands: NDG ; X-RAY DIFFRACTION 2.8Å

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