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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: RuvA-C
H: RuvA-C, UBA, CRAL/TRIO-N, HBS1
T: RuvA-C, UBA, CRAL/TRIO-N, HBS1
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:

e3frhA1[A:1-54] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

16S RRNA METHYLASE ; ligands: SAH ; X-RAY DIFFRACTION 1.2Å

e6pi9A2[A:0-56] * nonrep Image Pymol Jmol Links: PDB, SCOP, CATH

16S rRNA (guanine(1405)-N(7))-methyltransferase ; ligands: SAH ; X-RAY DIFFRACTION 1.85Å

e5vmrC1[C:2-39] * nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Bot.2110.4 ; X-RAY DIFFRACTION 1.95Å

e1xb2B1[B:56-111] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ELONGATION FACTOR TS, MITOCHONDRIAL ; X-RAY DIFFRACTION 2.2Å

e1efuB1[B:1-54] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ELONGATION FACTOR TS ; X-RAY DIFFRACTION 2.5Å

e3b89A2[A:2-52] * nonrep Image Pymol Jmol Links: PDB, SCOP, CATH

16S rRNA methylase ; X-RAY DIFFRACTION 2.6Å

e5vidF1[F:1-40] * nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Bot.0671.2 ; X-RAY DIFFRACTION 2.75Å

e6cn0B1[B:1-56] * nonrep Image Pymol Jmol Links: PDB, SCOP, CATH

16S rRNA (guanine(1405)-N(7))-methyltransferase ; ligands: SO4 ; X-RAY DIFFRACTION 2.95Å

e4bkxA1[A:200-282] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

METASTASIS-ASSOCIATED PROTEIN MTA1 ; X-RAY DIFFRACTION 3.0Å

e4yxyA1[A:1-91] * nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

dTor_9x31L ; X-RAY DIFFRACTION 3.200Å

e6h3aB1[B:146-202] * nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

SWI/SNF-related matrix-associated actin-dependent regulator of chromatin subfamily A containing DEAD/H box 1 ; X-RAY DIFFRACTION 5.50Å

e2cp8A1[A:8-48] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH

Next to BRCA1 gene 1 protein ; SOLUTION NMR

e5uoiA1[A:1-43] * nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HHH_rd1_0142 ; SOLUTION NMR

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