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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

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

X: Rubredoxin-like

binds one zinc with two CxxC motifs on two beta-hairpins

X: RING/U-box-like

binds two zincs. one in the same way as rubredoxin, probably related to rubredoxin. the other in a similar way as glucocorticoid receptor

X: Glucocorticoid receptor-like

binds zinc with one beta-hairpin and one helix, the helix binds DNA

X: EGF-like
H: LDL receptor-like module
T: LDL receptor-like module
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.

Representatives:

e2gtlM3[M:9-41] * nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HEMOGLOBIN LINKER CHAIN L1 ; X-RAY DIFFRACTION 3.5Å

e4d0i03[0:9-43] Image Pymol Jmol Links: PDB, SCOP, CATH Obsolete PDB

e4d0i53[5:9-43] Image Pymol Jmol Links: PDB, SCOP, CATH Obsolete PDB

e4d0iC3[C:9-43] Image Pymol Jmol Links: PDB, SCOP, CATH Obsolete PDB

e4d0iH3[H:9-43] Image Pymol Jmol Links: PDB, SCOP, CATH Obsolete PDB

e4d0iM3[M:9-43] Image Pymol Jmol Links: PDB, SCOP, CATH Obsolete PDB

e4d0iR3[R:9-43] Image Pymol Jmol Links: PDB, SCOP, CATH Obsolete PDB

e4d0iW3[W:9-43] Image Pymol Jmol Links: PDB, SCOP, CATH Obsolete PDB

e4d0ib3[b:9-43] Image Pymol Jmol Links: PDB, SCOP, CATH Obsolete PDB

e4d0ig3[g:9-43] Image Pymol Jmol Links: PDB, SCOP, CATH Obsolete PDB

e4d0il3[l:9-43] Image Pymol Jmol Links: PDB, SCOP, CATH Obsolete PDB

e4d0iq3[q:9-43] Image Pymol Jmol Links: PDB, SCOP, CATH Obsolete PDB

e4d0iv3[v:9-43] Image Pymol Jmol Links: PDB, SCOP, CATH Obsolete PDB

e4v93C03[C0:9-43] Image Pymol Jmol Links: PDB, SCOP, CATH

HEMOGLOBIN LINKER CHAIN L1 ; ELECTRON MICROSCOPY

e4v93C53[C5:9-43] Image Pymol Jmol Links: PDB, SCOP, CATH

HEMOGLOBIN LINKER CHAIN L1 ; ELECTRON MICROSCOPY

e4v93CC3[CC:9-43] Image Pymol Jmol Links: PDB, SCOP, CATH

HEMOGLOBIN LINKER CHAIN L1 ; ELECTRON MICROSCOPY

e4v93CH3[CH:9-43] Image Pymol Jmol Links: PDB, SCOP, CATH

HEMOGLOBIN LINKER CHAIN L1 ; ELECTRON MICROSCOPY

e4v93CM3[CM:9-43] Image Pymol Jmol Links: PDB, SCOP, CATH

HEMOGLOBIN LINKER CHAIN L1 ; ELECTRON MICROSCOPY

e4v93CR3[CR:9-43] Image Pymol Jmol Links: PDB, SCOP, CATH

HEMOGLOBIN LINKER CHAIN L1 ; ELECTRON MICROSCOPY

e4v93CW3[CW:9-43] Image Pymol Jmol Links: PDB, SCOP, CATH

HEMOGLOBIN LINKER CHAIN L1 ; ELECTRON MICROSCOPY

e4v93Cb3[Cb:9-43] Image Pymol Jmol Links: PDB, SCOP, CATH

HEMOGLOBIN LINKER CHAIN L1 ; ELECTRON MICROSCOPY

e4v93Cg3[Cg:9-43] Image Pymol Jmol Links: PDB, SCOP, CATH

HEMOGLOBIN LINKER CHAIN L1 ; ELECTRON MICROSCOPY

e4v93Cl3[Cl:9-43] Image Pymol Jmol Links: PDB, SCOP, CATH

HEMOGLOBIN LINKER CHAIN L1 ; ELECTRON MICROSCOPY

e4v93Cq3[Cq:9-43] Image Pymol Jmol Links: PDB, SCOP, CATH

HEMOGLOBIN LINKER CHAIN L1 ; ELECTRON MICROSCOPY

e4v93Cv3[Cv:9-43] Image Pymol Jmol Links: PDB, SCOP, CATH

HEMOGLOBIN LINKER CHAIN L1 ; ELECTRON MICROSCOPY

e4u8uM2[M:4-43] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Linker L1 ; X-RAY DIFFRACTION 3.2Å

e4u8ub1[b:4-43] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Linker L1 ; X-RAY DIFFRACTION 3.2Å

e4u8uq3[q:4-43] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Linker L1 ; X-RAY DIFFRACTION 3.2Å

e5m3lM1[M:9-43] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Hemoglobin linker chain L1 ; ELECTRON MICROSCOPY

extended segmentsextended, non-globular segments, frequently bind to other proteins to form complexes