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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

X: Tetracyclin repressor-like, C-terminal domain
H: Tetracyclin repressor-like, C-terminal domain
T: Tetracyclin repressor-like, C-terminal domain
F: TetR_C_29

PF17938 CL0174

Representatives:

e2fx0A2[A:77-198] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HEMOLYSIN II REGULATORY PROTEIN ; X-RAY DIFFRACTION 2.4Å

e3lwjA2[A:74-200] Image Pymol Jmol Links: PDB, SCOP, CATH

Putative TetR-family transcriptional regulator ; ligands: EDO ; X-RAY DIFFRACTION 2.07Å

e3npiA2[A:85-227] Image Pymol Jmol Links: PDB, SCOP, CATH

TetR family regulatory protein ; ligands: SO4 ; X-RAY DIFFRACTION 2.96Å

e3npiB4[B:87-226] Image Pymol Jmol Links: PDB, SCOP, CATH

TetR family regulatory protein ; ligands: SO4 ; X-RAY DIFFRACTION 2.96Å

e3dewA2[A:70-196] Image Pymol Jmol Links: PDB, SCOP, CATH

Transcriptional regulator, TetR family ; ligands: ACY,BME,CL,EDO ; X-RAY DIFFRACTION 1.75Å

e2jk3A1[A:77-190] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HEMOLYSIN II REGULATORY PROTEIN ; ligands: SO4 ; X-RAY DIFFRACTION 2.2Å

e2wv1A2[A:77-198] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HEMOLYSIN II REGULATORY PROTEIN ; X-RAY DIFFRACTION 2.3Å

e2jk3B2[B:77-190] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HEMOLYSIN II REGULATORY PROTEIN ; ligands: SO4 ; X-RAY DIFFRACTION 2.2Å

e2jj7A1[A:77-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed,

HEMOLYSIN II REGULATORY PROTEIN ; X-RAY DIFFRACTION 2.10Å

e2jj7B2[B:77-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed,

HEMOLYSIN II REGULATORY PROTEIN ; X-RAY DIFFRACTION 2.10Å

e2wv1B2[B:77-198] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HEMOLYSIN II REGULATORY PROTEIN ; ligands: NO3 ; X-RAY DIFFRACTION 2.3Å

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.

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