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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

X: Major tropism determinant (Mtd) trimerization domain-related
H: Major tropism determinant (Mtd) trimerization domain-related
T: Major tropism determinant (Mtd) trimerization domain-related
F: Mtd_N

PF18454 CL0737

Representatives:

e1yu0A5[A:5-54] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Major Tropism Determinant (Mtd-P1) ; X-RAY DIFFRACTION 1.56Å

e2c3fA3[A:7-66] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HYALURONIDASE, PHAGE ASSOCIATED ; X-RAY DIFFRACTION 1.81Å

e2dp5A2[A:7-66] Image Pymol Jmol Links: PDB, SCOP, CATH

HYALURONIDASE ; X-RAY DIFFRACTION 3.55Å

e2yvvA2[A:7-66] Image Pymol Jmol Links: PDB, SCOP, CATH

HYALURONIDASE, PHAGE ASSOCIATED ; X-RAY DIFFRACTION 2.6Å

e2yw0A2[A:7-66] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HYALURONIDASE, PHAGE ASSOCIATED ; X-RAY DIFFRACTION 2.6Å

e2yx2A2[A:7-66] Image Pymol Jmol Links: PDB, SCOP, CATH

HYALURONIDASE, PHAGE ASSOCIATED ; X-RAY DIFFRACTION 2.8Å

e3ekaA2[A:7-66] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HYALURONIDASE, PHAGE ASSOCIATED ; X-RAY DIFFRACTION 3.1Å

e6x3mC2[C:6-56,C:85-94] Image Pymol Jmol Links: PDB, SCOP, CATH

Hyaluronoglucosaminidase ; X-RAY DIFFRACTION 3.581Å

e6x3mD1[D:7-56,D:85-94] Image Pymol Jmol Links: PDB, SCOP, CATH

Hyaluronoglucosaminidase ; X-RAY DIFFRACTION 3.581Å

e6x3mE1[E:8-56,E:85-94] Image Pymol Jmol Links: PDB, SCOP, CATH

Hyaluronoglucosaminidase ; X-RAY DIFFRACTION 3.581Å

e6x3mF1[F:3-56,F:85-94] Image Pymol Jmol Links: PDB, SCOP, CATH

Hyaluronoglucosaminidase ; X-RAY DIFFRACTION 3.581Å

e6x3mG1[G:6-56,G:85-94] Image Pymol Jmol Links: PDB, SCOP, CATH

Hyaluronoglucosaminidase ; X-RAY DIFFRACTION 3.581Å

e6x3mA1[A:7-56,A:85-94] Image Pymol Jmol Links: PDB, SCOP, CATH

Hyaluronoglucosaminidase ; X-RAY DIFFRACTION 3.581Å

e6x3mB1[B:6-56,B:85-94] Image Pymol Jmol Links: PDB, SCOP, CATH

Hyaluronoglucosaminidase ; X-RAY DIFFRACTION 3.581Å

e6x3mH1[H:8-56,H:85-94] Image Pymol Jmol Links: PDB, SCOP, CATH

Hyaluronoglucosaminidase ; X-RAY DIFFRACTION 3.581Å

e6x3mI2[I:6-56,I:85-94] Image Pymol Jmol Links: PDB, SCOP, CATH

Hyaluronoglucosaminidase ; X-RAY DIFFRACTION 3.581Å

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