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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

X: cradle loop barrel

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

X: SH3
H: SH3
T: SH3
F: SH3_11

PF18103 CL0010

Representatives:

e3l2qA3[A:313-374] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

INTEGRASE ; ligands: GOL ; X-RAY DIFFRACTION 3.25Å

e3oy9A1[A:313-375] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PFV integrase ; ligands: SO4 ; X-RAY DIFFRACTION 2.550Å

e4bdyA3[A:323-375] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

INTEGRASE ; ligands: SO4 ; X-RAY DIFFRACTION 2.52Å

e3oyaA1[A:313-375] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PFV INTEGRASE ; ligands: SO4 ; X-RAY DIFFRACTION 2.65Å

e3oybA1[A:313-375] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PFV INTEGRASE ; ligands: SO4 ; X-RAY DIFFRACTION 2.54Å

e3oycA1[A:313-375] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PFV INTEGRASE ; ligands: SO4 ; X-RAY DIFFRACTION 2.66Å

e3oydA1[A:313-375] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PFV INTEGRASE ; ligands: SO4 ; X-RAY DIFFRACTION 2.54Å

e3oyeA1[A:313-375] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PFV INTEGRASE ; ligands: SO4 ; X-RAY DIFFRACTION 2.74Å

e3oyfA1[A:313-375] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PFV INTEGRASE ; ligands: SO4 ; X-RAY DIFFRACTION 2.51Å

e3oygA1[A:313-375] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PFV INTEGRASE ; ligands: SO4 ; X-RAY DIFFRACTION 2.56Å

e3oyhA1[A:313-375] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PFV INTEGRASE ; ligands: SO4 ; X-RAY DIFFRACTION 2.74Å

e3oyiA1[A:313-375] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PFV INTEGRASE ; ligands: SO4 ; X-RAY DIFFRACTION 2.72Å

e3oyjA1[A:313-375] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PFV INTEGRASE ; ligands: SO4 ; X-RAY DIFFRACTION 2.68Å

e3oykA1[A:313-375] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PFV INTEGRASE ; ligands: SO4 ; X-RAY DIFFRACTION 2.72Å

e3oylA1[A:313-375] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PFV INTEGRASE ; ligands: SO4,ZZX ; X-RAY DIFFRACTION 2.54Å

e3oymA1[A:313-375] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PFV INTEGRASE ; ligands: SO4 ; X-RAY DIFFRACTION 2.02Å

e3oynA1[A:313-375] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PFV INTEGRASE ; ligands: SO4 ; X-RAY DIFFRACTION 2.68Å

e3s3mA1[A:313-375] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PFV INTEGRASE ; ligands: DLU,SO4 ; X-RAY DIFFRACTION 2.49Å

e3s3nA1[A:313-375] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PFV INTEGRASE ; ligands: DLU,SO4 ; X-RAY DIFFRACTION 2.49Å

e3s3oA1[A:313-375] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PFV INTEGRASE ; ligands: DLU,SO4 ; X-RAY DIFFRACTION 2.55Å

e4bacA3[A:313-375] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

INTEGRASE ; X-RAY DIFFRACTION 3.26Å

e4bdzA9[A:313-375] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PFV INTEGRASE ; ligands: SO4 ; X-RAY DIFFRACTION 2.85Å

e4be0A9[A:313-375] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PFV INTEGRASE ; ligands: SO4 ; X-RAY DIFFRACTION 2.68Å

e4be1A9[A:313-375] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

INTEGRASE ; ligands: SO4 ; X-RAY DIFFRACTION 2.71Å

e4be2A9[A:313-375] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PFV INTEGRASE ; ligands: SO4 ; X-RAY DIFFRACTION 2.38Å

e4e7hA3[A:313-375] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PRO-POL POLYPROTEIN ; ligands: SO4 ; X-RAY DIFFRACTION 2.57Å

e4e7iA9[A:313-375] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Pro-Pol polyprotein ; ligands: SO4 ; X-RAY DIFFRACTION 2.53Å

e4ikfA3[A:313-375] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Integrase ; ligands: SO4 ; X-RAY DIFFRACTION 3.40Å

e3l2rA1[A:313-374] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

INTEGRASE ; ligands: GOL ; X-RAY DIFFRACTION 2.88Å

e3l2uA1[A:313-374] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

INTEGRASE ; ligands: GOL ; X-RAY DIFFRACTION 3.15Å

e3l2vA1[A:313-374] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

INTEGRASE ; ligands: GOL ; X-RAY DIFFRACTION 3.2Å

e3l2wA1[A:313-374] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

INTEGRASE ; ligands: GOL ; X-RAY DIFFRACTION 3.2Å

e3os0A1[A:313-374] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

INTEGRASE ; X-RAY DIFFRACTION 2.81Å

e3os1A1[A:313-374] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

INTEGRASE ; X-RAY DIFFRACTION 2.97Å

e3os2A1[A:313-374] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

INTEGRASE ; X-RAY DIFFRACTION 3.32Å

e4e7jA9[A:313-374] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PRO-POL POLYPROTEIN ; X-RAY DIFFRACTION 3.15Å

e4e7kA9[A:313-374] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PRO-POL POLYPROTEIN ; X-RAY DIFFRACTION 3.02Å

e4e7lA9[A:313-374] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PRO-POL POLYPROTEIN ; X-RAY DIFFRACTION 3.0Å

e4ztfA3[A:313-375] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Integrase ; ligands: SO4 ; X-RAY DIFFRACTION 2.700Å

e4ztjA3[A:313-375] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PFV INTEGRASE ; ligands: SO4 ; X-RAY DIFFRACTION 2.670Å

e5frmA3[A:313-375] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PFV INTEGRASE ; ligands: SO4 ; X-RAY DIFFRACTION 2.58Å

e5frnA1[A:313-375] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Integrase ; ligands: SO4 ; X-RAY DIFFRACTION 2.80Å

e5froA1[A:313-375] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PFV INTEGRASE ; ligands: SO4 ; X-RAY DIFFRACTION 2.67Å

e5uopA2[A:313-375] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

INTEGRASE ; ligands: SO4 ; X-RAY DIFFRACTION 2.846Å

e5uoqA2[A:313-375] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

INTEGRASE ; ligands: SO4 ; X-RAY DIFFRACTION 2.608Å

e5mmaA3[A:313-375] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

integrase ; ligands: GOL,SO4 ; X-RAY DIFFRACTION 2.55Å

e5mmbA2[A:313-375] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PFV INTEGRASE ; ligands: GOL,HEZ,OUY,SO4 ; X-RAY DIFFRACTION 2.77Å

e5no1A2[A:313-375] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Integrase ; ligands: HEZ,MES,SO4 ; X-RAY DIFFRACTION 2.6Å

e6rnyK3[K:313-375] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Integrase ; ELECTRON MICROSCOPY

e6rnyO3[O:313-375] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Integrase ; ELECTRON MICROSCOPY

e7aduA1[A:313-375] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Integrase ; ligands: GOL,MES,SO4 ; X-RAY DIFFRACTION 2.62Å

e7advA3[A:313-375] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Integrase ; ligands: GOL,R7N,SO4 ; X-RAY DIFFRACTION 2.65Å

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