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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

X: HTH
H: HTH
T: winged
F: z-alpha

PF02295 CL0123

Representatives:

e1xmkA1[A:294-366] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Double-stranded RNA-specific adenosine deaminase ; ligands: CD,CL,NI ; X-RAY DIFFRACTION 0.970Å

e1j75A1[A:113-169] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TUMOR STROMA AND ACTIVATED MACROPHAGE PROTEIN DLM-1 ; X-RAY DIFFRACTION 1.85Å

e1sfuA1[A:6-75] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

34L protein ; X-RAY DIFFRACTION 2.0Å

e2gxbA1[A:140-198] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

DOUBLE-STRANDED RNA-SPECIFIC ADENOSINE DEAMINASE ; X-RAY DIFFRACTION 2.25Å

e1oyiA1[A:13-74] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

double-stranded RNA-binding protein ; SOLUTION NMR

e5j6xA1[A:4-69] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Z-DNA binding protein kinase ; X-RAY DIFFRACTION 2.49Å

e5j6xB1[B:5-69] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Z-DNA binding protein kinase ; X-RAY DIFFRACTION 2.49Å

e7c0iA1[A:9-70] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Double-stranded RNA-binding protein,Double-stranded RNA-specific adenosine deaminase ; X-RAY DIFFRACTION 2.400Å

e7c0iB1[B:3-69] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Double-stranded RNA-binding protein,Double-stranded RNA-specific adenosine deaminase ; ligands: SO4 ; X-RAY DIFFRACTION 2.400Å

e7c0iC1[C:6-70] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Double-stranded RNA-binding protein,Double-stranded RNA-specific adenosine deaminase ; X-RAY DIFFRACTION 2.400Å

e8i9jB1[B:13-74] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

; 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.

T: DNA-binding domain of intron-encoded endonucleases

lacks the N-terminal helix, circularly permuted wing

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

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