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X - Possible homology level

H - Homology level

T - Topology level

F - Family level

* - Provisional representative

Keyword search

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

X: cradle loop barrel

Refs: Structure 14, 1489-1498; Current opinion in structural biology 18, 358-365

X: Barrel domain in upper collar protein
H: Barrel domain in upper collar protein
T: Barrel domain in upper collar protein
F: Phage_connector

PF05352

Representatives:

e1h5wA3[A:61-129] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

UPPER COLLAR PROTEIN ; X-RAY DIFFRACTION 2.100Å

e1fouA2[A:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

UPPER COLLAR PROTEIN ; X-RAY DIFFRACTION 3.2Å

e1fouB2[B:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

UPPER COLLAR PROTEIN ; X-RAY DIFFRACTION 3.2Å

e1fouC2[C:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

UPPER COLLAR PROTEIN ; X-RAY DIFFRACTION 3.2Å

e1fouD2[D:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

UPPER COLLAR PROTEIN ; X-RAY DIFFRACTION 3.2Å

e1fouE2[E:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

UPPER COLLAR PROTEIN ; X-RAY DIFFRACTION 3.2Å

e1fouF2[F:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

UPPER COLLAR PROTEIN ; X-RAY DIFFRACTION 3.2Å

e1fouG2[G:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

UPPER COLLAR PROTEIN ; X-RAY DIFFRACTION 3.2Å

e1fouH2[H:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

UPPER COLLAR PROTEIN ; X-RAY DIFFRACTION 3.2Å

e1fouI2[I:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

UPPER COLLAR PROTEIN ; X-RAY DIFFRACTION 3.2Å

e1fouJ2[J:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

UPPER COLLAR PROTEIN ; X-RAY DIFFRACTION 3.2Å

e1fouK2[K:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

UPPER COLLAR PROTEIN ; X-RAY DIFFRACTION 3.2Å

e1fouL2[L:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

UPPER COLLAR PROTEIN ; X-RAY DIFFRACTION 3.2Å

e1ijgA2[A:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

UPPER COLLAR PROTEIN ; X-RAY DIFFRACTION 2.9Å

e1ijgB2[B:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

UPPER COLLAR PROTEIN ; X-RAY DIFFRACTION 2.9Å

e1ijgC2[C:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

UPPER COLLAR PROTEIN ; X-RAY DIFFRACTION 2.9Å

e1ijgD2[D:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

UPPER COLLAR PROTEIN ; X-RAY DIFFRACTION 2.9Å

e1ijgE2[E:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

UPPER COLLAR PROTEIN ; X-RAY DIFFRACTION 2.9Å

e1ijgF2[F:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

UPPER COLLAR PROTEIN ; X-RAY DIFFRACTION 2.9Å

e1ijgG2[G:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

UPPER COLLAR PROTEIN ; X-RAY DIFFRACTION 2.9Å

e1ijgH2[H:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

UPPER COLLAR PROTEIN ; X-RAY DIFFRACTION 2.9Å

e1ijgI2[I:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

UPPER COLLAR PROTEIN ; X-RAY DIFFRACTION 2.9Å

e1ijgJ2[J:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

UPPER COLLAR PROTEIN ; X-RAY DIFFRACTION 2.9Å

e1ijgK2[K:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

UPPER COLLAR PROTEIN ; X-RAY DIFFRACTION 2.9Å

e1ijgL2[L:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

UPPER COLLAR PROTEIN ; X-RAY DIFFRACTION 2.9Å

e1jnbA2[A:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

UPPER COLLAR PROTEIN ; X-RAY DIFFRACTION 3.21Å

e1jnbB2[B:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

UPPER COLLAR PROTEIN ; X-RAY DIFFRACTION 3.21Å

e1jnbC2[C:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

UPPER COLLAR PROTEIN ; X-RAY DIFFRACTION 3.21Å

e1jnbD2[D:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

UPPER COLLAR PROTEIN ; X-RAY DIFFRACTION 3.21Å

e1jnbE2[E:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

UPPER COLLAR PROTEIN ; X-RAY DIFFRACTION 3.21Å

e1jnbF2[F:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

UPPER COLLAR PROTEIN ; X-RAY DIFFRACTION 3.21Å

e1jnbG2[G:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

UPPER COLLAR PROTEIN ; X-RAY DIFFRACTION 3.21Å

e1jnbH2[H:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

UPPER COLLAR PROTEIN ; X-RAY DIFFRACTION 3.21Å

e1jnbI2[I:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

UPPER COLLAR PROTEIN ; X-RAY DIFFRACTION 3.21Å

e1jnbJ2[J:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

UPPER COLLAR PROTEIN ; X-RAY DIFFRACTION 3.21Å

e1jnbK2[K:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

UPPER COLLAR PROTEIN ; X-RAY DIFFRACTION 3.21Å

e1jnbL2[L:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

UPPER COLLAR PROTEIN ; X-RAY DIFFRACTION 3.21Å

e1h5wB2[B:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

UPPER COLLAR PROTEIN ; X-RAY DIFFRACTION 2.100Å

e1h5wC2[C:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

UPPER COLLAR PROTEIN ; ligands: MPD ; X-RAY DIFFRACTION 2.100Å

e6qx70a2[0a:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Portal protein ; ELECTRON MICROSCOPY

e6qx70b2[0b:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Portal protein ; ELECTRON MICROSCOPY

e6qx70c2[0c:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Portal protein ; ELECTRON MICROSCOPY

e6qx70d1[0d:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Portal protein ; ELECTRON MICROSCOPY

e6qx70e1[0e:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Portal protein ; ELECTRON MICROSCOPY

e6qx70f2[0f:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Portal protein ; ELECTRON MICROSCOPY

e6qx70g2[0g:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Portal protein ; ELECTRON MICROSCOPY

e6qx70h1[0h:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Portal protein ; ELECTRON MICROSCOPY

e6qx70i2[0i:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Portal protein ; ELECTRON MICROSCOPY

e6qx70j1[0j:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Portal protein ; ELECTRON MICROSCOPY

e6qx70k2[0k:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Portal protein ; ELECTRON MICROSCOPY

e6qx70l2[0l:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Portal protein ; ELECTRON MICROSCOPY

e6qyj0a1[0a:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Portal protein ; ELECTRON MICROSCOPY

e6qyj0b1[0b:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Portal protein ; ELECTRON MICROSCOPY

e6qyj0c2[0c:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Portal protein ; ELECTRON MICROSCOPY

e6qyj0d2[0d:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Portal protein ; ELECTRON MICROSCOPY

e6qyj0e1[0e:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Portal protein ; ELECTRON MICROSCOPY

e6qyj0f1[0f:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Portal protein ; ELECTRON MICROSCOPY

e6qyj0g2[0g:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Portal protein ; ELECTRON MICROSCOPY

e6qyj0h2[0h:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Portal protein ; ELECTRON MICROSCOPY

e6qyj0i2[0i:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Portal protein ; ELECTRON MICROSCOPY

e6qyj0j2[0j:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Portal protein ; ELECTRON MICROSCOPY

e6qyj0k1[0k:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Portal protein ; ELECTRON MICROSCOPY

e6qyj0l1[0l:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Portal protein ; ELECTRON MICROSCOPY

e6qym0a2[0a:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Portal protein ; ELECTRON MICROSCOPY

e6qym0b2[0b:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Portal protein ; ELECTRON MICROSCOPY

e6qym0c2[0c:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Portal protein ; ELECTRON MICROSCOPY

e6qym0d2[0d:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Portal protein ; ELECTRON MICROSCOPY

e6qym0e2[0e:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Portal protein ; ELECTRON MICROSCOPY

e6qym0f1[0f:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Portal protein ; ELECTRON MICROSCOPY

e6qym0g1[0g:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Portal protein ; ELECTRON MICROSCOPY

e6qym0h2[0h:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Portal protein ; ELECTRON MICROSCOPY

e6qym0i2[0i:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Portal protein ; ELECTRON MICROSCOPY

e6qym0j1[0j:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Portal protein ; ELECTRON MICROSCOPY

e6qym0k1[0k:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Portal protein ; ELECTRON MICROSCOPY

e6qym0l2[0l:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Portal protein ; ELECTRON MICROSCOPY

e6qz90a2[0a:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Portal protein ; ELECTRON MICROSCOPY

e6qz90b1[0b:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Portal protein ; ELECTRON MICROSCOPY

e6qz90c1[0c:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Portal protein ; ELECTRON MICROSCOPY

e6qz90d2[0d:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Portal protein ; ELECTRON MICROSCOPY

e6qz90e1[0e:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Portal protein ; ELECTRON MICROSCOPY

e6qz90f1[0f:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Portal protein ; ELECTRON MICROSCOPY

e6qz90g2[0g:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Portal protein ; ELECTRON MICROSCOPY

e6qz90h1[0h:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Portal protein ; ELECTRON MICROSCOPY

e6qz90i2[0i:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Portal protein ; ELECTRON MICROSCOPY

e6qz90j2[0j:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Portal protein ; ELECTRON MICROSCOPY

e6qz90k1[0k:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Portal protein ; ELECTRON MICROSCOPY

e6qz90l2[0l:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Portal protein ; ELECTRON MICROSCOPY

e6qzf0a1[0a:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Portal protein ; ELECTRON MICROSCOPY

e6qzf0b2[0b:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Portal protein ; ELECTRON MICROSCOPY

e6qzf0c2[0c:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Portal protein ; ELECTRON MICROSCOPY

e6qzf0d2[0d:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Portal protein ; ELECTRON MICROSCOPY

e6qzf0e1[0e:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Portal protein ; ELECTRON MICROSCOPY

e6qzf0f2[0f:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Portal protein ; ELECTRON MICROSCOPY

e6qzf0g1[0g:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Portal protein ; ELECTRON MICROSCOPY

e6qzf0h1[0h:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Portal protein ; ELECTRON MICROSCOPY

e6qzf0i2[0i:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Portal protein ; ELECTRON MICROSCOPY

e6qzf0j2[0j:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Portal protein ; ELECTRON MICROSCOPY

e6qzf0k2[0k:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Portal protein ; ELECTRON MICROSCOPY

e6qzf0l2[0l:61-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Portal protein ; ELECTRON MICROSCOPY

e7pv2A2[A:60-131] Image Pymol Jmol Links: PDB, SCOP, CATH

Head-tail connector (Portal protein) ; ELECTRON MICROSCOPY

e7pv2B1[B:60-131] Image Pymol Jmol Links: PDB, SCOP, CATH

Head-tail connector (Portal protein) ; ELECTRON MICROSCOPY

e7pv2C1[C:60-131] Image Pymol Jmol Links: PDB, SCOP, CATH

Head-tail connector (Portal protein) ; ELECTRON MICROSCOPY

e7pv2D2[D:60-131] Image Pymol Jmol Links: PDB, SCOP, CATH

Head-tail connector (Portal protein) ; ELECTRON MICROSCOPY

e7pv2E1[E:60-131] Image Pymol Jmol Links: PDB, SCOP, CATH

Head-tail connector (Portal protein) ; ELECTRON MICROSCOPY

e7pv2F2[F:60-131] Image Pymol Jmol Links: PDB, SCOP, CATH

Head-tail connector (Portal protein) ; ELECTRON MICROSCOPY

e7pv2G2[G:60-131] Image Pymol Jmol Links: PDB, SCOP, CATH

Head-tail connector (Portal protein) ; ELECTRON MICROSCOPY

e7pv2H2[H:60-131] Image Pymol Jmol Links: PDB, SCOP, CATH

Head-tail connector (Portal protein) ; ELECTRON MICROSCOPY

e7pv2I1[I:60-131] Image Pymol Jmol Links: PDB, SCOP, CATH

Head-tail connector (Portal protein) ; ELECTRON MICROSCOPY

e7pv2J1[J:60-131] Image Pymol Jmol Links: PDB, SCOP, CATH

Head-tail connector (Portal protein) ; ELECTRON MICROSCOPY

e7pv2K2[K:60-131] Image Pymol Jmol Links: PDB, SCOP, CATH

Head-tail connector (Portal protein) ; ELECTRON MICROSCOPY

e7pv2L1[L:60-131] Image Pymol Jmol Links: PDB, SCOP, CATH

Head-tail connector (Portal protein) ; ELECTRON MICROSCOPY

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.

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