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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: DNA-binding domain of intron-encoded endonucleases

lacks the N-terminal helix, circularly permuted wing

T: FF domain
F: Ribosomal_S17e

PF00833

Representatives:

e1rq6A1[A:1-62] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

30S ribosomal protein S17e ; SOLUTION NMR

e2xzmV1[V:2-122] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH Obsolete PDB

e3o2zK1[K:7-73] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH Obsolete PDB

e3zeyL1[L:2-128] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH Obsolete PDB

e4v6iAQ1[AQ:1-136] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

40S ribosomal protein rpS17 (S17e) ; ELECTRON MICROSCOPY

e5m1jR21[R2:2-126] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

40S ribosomal protein S17-B ; ELECTRON MICROSCOPY

e5mc6G1[G:2-97] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

40S ribosomal protein S17-B ; ELECTRON MICROSCOPY

e5tgmC71[C7:2-126] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

40S ribosomal protein S17-B ; ligands: LEU,OHX,PHE ; X-RAY DIFFRACTION 3.500Å

e5tgmc71[c7:2-122] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

40S ribosomal protein S17-B ; ligands: LEU,MG,PHE ; X-RAY DIFFRACTION 3.500Å

e7osaeS171[eS17:2-122] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BJ4_G0020710.mRNA.1.CDS.1 ; X-RAY DIFFRACTION 3.0Å

e7osmeS171[eS17:2-122] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BJ4_G0020710.mRNA.1.CDS.1 ; X-RAY DIFFRACTION 3.0Å

e7rr5SR1[SR:2-126] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

40S ribosomal protein S17-A ; ELECTRON MICROSCOPY

e7mpiBR1[BR:2-126] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

40S ribosomal protein S17-A ; ELECTRON MICROSCOPY

e7mpjBR1[BR:2-126] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

40S ribosomal protein S17-A ; ELECTRON MICROSCOPY

e7n8bBR1[BR:2-126] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

40S ribosomal protein S17-A ; ELECTRON MICROSCOPY

e7pzyS1[S:2-126] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Ribosomal 40S subunit protein S17B ; ELECTRON MICROSCOPY

e7q08S1[S:2-126] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Ribosomal 40S subunit protein S17B ; ELECTRON MICROSCOPY

e7q0fS1[S:2-126] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Ribosomal 40S subunit protein S17B ; ELECTRON MICROSCOPY

e7q0pS1[S:2-126] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Ribosomal 40S subunit protein S17B ; ELECTRON MICROSCOPY

e7q0rS1[S:2-126] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Ribosomal 40S subunit protein S17B ; ELECTRON MICROSCOPY

e8q5iS1[S:2-126] Image Pymol Jmol Links: PDB, SCOP, CATHDOI

; ELECTRON MICROSCOPY

e4v7eBR1[BR:1-116] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

40S ribosomal protein S17E ; ELECTRON MICROSCOPY

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