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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: Rrf2

PF02082 CL0123

Representatives:

e1ylfA1[A:5-142] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH

RRF2 family protein ; ligands: CL ; X-RAY DIFFRACTION 2.50Å

e3lwfA1[A:-3-140] Image Pymol Jmol Links: PDB, SCOP, CATH

Putative transcriptional regulator ; ligands: CL,SO4 ; X-RAY DIFFRACTION 2.06Å

e2y75A1[A:1-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HTH-TYPE TRANSCRIPTIONAL REGULATOR CYMR ; ligands: SO4 ; X-RAY DIFFRACTION 2.00Å

e3t8rA1[A:1-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Staphylococcus aureus CymR ; X-RAY DIFFRACTION 1.70Å

e3lwfB1[B:-3-140] Image Pymol Jmol Links: PDB, SCOP, CATH

Putative transcriptional regulator ; ligands: CL,SO4 ; X-RAY DIFFRACTION 2.06Å

e3lwfC1[C:-3-140] Image Pymol Jmol Links: PDB, SCOP, CATH

Putative transcriptional regulator ; ligands: CL,SO4 ; X-RAY DIFFRACTION 2.06Å

e3lwfD1[D:-3-140] Image Pymol Jmol Links: PDB, SCOP, CATH

Putative transcriptional regulator ; ligands: CL,SO4 ; X-RAY DIFFRACTION 2.06Å

e2y75B1[B:1-128] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HTH-TYPE TRANSCRIPTIONAL REGULATOR CYMR ; ligands: CL,SO4 ; X-RAY DIFFRACTION 2.00Å

e2y75C1[C:1-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HTH-TYPE TRANSCRIPTIONAL REGULATOR CYMR ; ligands: SO4 ; X-RAY DIFFRACTION 2.00Å

e2y75D1[D:1-128] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HTH-TYPE TRANSCRIPTIONAL REGULATOR CYMR ; ligands: CL,SO4 ; X-RAY DIFFRACTION 2.00Å

e2y75E1[E:1-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HTH-TYPE TRANSCRIPTIONAL REGULATOR CYMR ; ligands: SO4 ; X-RAY DIFFRACTION 2.00Å

e2y75F1[F:1-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HTH-TYPE TRANSCRIPTIONAL REGULATOR CYMR ; ligands: CL,SO4 ; X-RAY DIFFRACTION 2.00Å

e3t8tA1[A:-2-119] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

STAPHYLOCOCCUS AUREUS CYMR (OXIDIZED FORM) ; X-RAY DIFFRACTION 1.75Å

e4hf1A1[A:1-144] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HTH-type transcriptional regulator IscR ; X-RAY DIFFRACTION 2.22Å

e1ylfC1[C:6-142] Image Pymol Jmol Links: PDB, SCOP, CATH

RRF2 family protein ; ligands: CL ; X-RAY DIFFRACTION 2.50Å

e1xd7A1[A:6-132] Image Pymol Jmol Links: PDB, SCOP, CATH

ywnA ; ligands: SO4 ; X-RAY DIFFRACTION 2.3Å

e3k69A1[A:6-160] Image Pymol Jmol Links: PDB, SCOP, CATH

Putative transcription regulator ; ligands: DMS ; X-RAY DIFFRACTION 1.95Å

e1ylfB1[B:7-140] Image Pymol Jmol Links: PDB, SCOP, CATH

RRF2 family protein ; ligands: CL ; X-RAY DIFFRACTION 2.50Å

e4hf2A3[A:1-132] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HTH-type transcriptional regulator IscR ; X-RAY DIFFRACTION 2.990Å

e4hf0B2[B:1-135] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HTH-type transcriptional regulator IscR ; ligands: SO4 ; X-RAY DIFFRACTION 1.90Å

e4hf0A2[A:1-133] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HTH-type transcriptional regulator IscR ; ligands: SO4 ; X-RAY DIFFRACTION 1.90Å

e4hf1B2[B:1-136] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HTH-type transcriptional regulator IscR ; X-RAY DIFFRACTION 2.22Å

e4hf2B2[B:1-136] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HTH-type transcriptional regulator IscR ; X-RAY DIFFRACTION 2.990Å

e4cicA1[A:-3-149] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TRANSCRIPTIONAL REGULATOR, BADM/RRF2 FAMILY ; ligands: NA ; X-RAY DIFFRACTION 1.6Å

e4cicB1[B:-3-148] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TRANSCRIPTIONAL REGULATOR, BADM/RRF2 FAMILY ; ligands: NA ; X-RAY DIFFRACTION 1.6Å

e4chuA1[A:0-139] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HTH-TYPE TRANSCRIPTIONAL REGULATOR ISCR ; X-RAY DIFFRACTION 2.49Å

e4chuB1[B:1-135] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HTH-TYPE TRANSCRIPTIONAL REGULATOR ISCR ; X-RAY DIFFRACTION 2.49Å

e5n07A1[A:2-144] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HTH-type transcriptional repressor NsrR ; ligands: CL,SF4,SO4 ; X-RAY DIFFRACTION 1.95Å

e5n08A1[A:2-134] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HTH-type transcriptional repressor NsrR ; X-RAY DIFFRACTION 3.90Å

e5n08B1[B:2-134] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HTH-type transcriptional repressor NsrR ; X-RAY DIFFRACTION 3.90Å

e5n08C1[C:2-134] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HTH-type transcriptional repressor NsrR ; X-RAY DIFFRACTION 3.90Å

e5n08D1[D:2-134] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HTH-type transcriptional repressor NsrR ; X-RAY DIFFRACTION 3.90Å

e5n08E1[E:2-134] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HTH-type transcriptional repressor NsrR ; X-RAY DIFFRACTION 3.90Å

e6hsdB1[B:1-158] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Rrf2 family transcriptional regulator ; ligands: FES,GOL,MES ; X-RAY DIFFRACTION 1.600Å

e6hsdD1[D:1-160] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Rrf2 family transcriptional regulator ; ligands: CL,FES,GOL,MES ; X-RAY DIFFRACTION 1.600Å

e6hseC1[C:1-159] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Rrf2 family transcriptional regulator ; ligands: FES ; X-RAY DIFFRACTION 2.300Å

e6hseB1[B:1-158] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Rrf2 family transcriptional regulator ; ligands: FES,GOL ; X-RAY DIFFRACTION 2.300Å

e6hseD1[D:1-160] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Rrf2 family transcriptional regulator ; ligands: FES,SO4 ; X-RAY DIFFRACTION 2.300Å

e6hsmA1[A:1-164] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Rrf2 family transcriptional regulator ; ligands: FES,GOL,MES,MPD ; X-RAY DIFFRACTION 2.000Å

e6hsmD1[D:1-160] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Rrf2 family transcriptional regulator ; ligands: CL,FES,GOL,MES,MPD ; X-RAY DIFFRACTION 2.000Å

e6hsmB1[B:1-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Rrf2 family transcriptional regulator ; ligands: CL,FES,GOL,MG,MPD ; X-RAY DIFFRACTION 2.000Å

e6hsmC1[C:1-158] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Rrf2 family transcriptional regulator ; ligands: FES,GOL,MPD ; X-RAY DIFFRACTION 2.000Å

e6hsmG1[G:1-156] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Rrf2 family transcriptional regulator ; ligands: FES,MES,MPD ; X-RAY DIFFRACTION 2.000Å

e6hsmH1[H:1-158] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Rrf2 family transcriptional regulator ; ligands: FES,GOL,MPD ; X-RAY DIFFRACTION 2.000Å

e6hsdA1[A:1-160] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Rrf2 family transcriptional regulator ; ligands: FES,GOL,MES ; X-RAY DIFFRACTION 1.600Å

e6hsmE1[E:1-159] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Rrf2 family transcriptional regulator ; ligands: FES,GOL,MES,MPD ; X-RAY DIFFRACTION 2.000Å

e6hsmF1[F:1-158] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Rrf2 family transcriptional regulator ; ligands: CL,FES,GOL,MPD ; X-RAY DIFFRACTION 2.000Å

e6hsdC1[C:1-160] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Rrf2 family transcriptional regulator ; ligands: CL,FES,GOL,MES ; X-RAY DIFFRACTION 1.600Å

e6hseA1[A:1-161] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Rrf2 family transcriptional regulator ; ligands: FES,SO3,SO4 ; X-RAY DIFFRACTION 2.300Å

e6y45A1[A:1-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Rrf2 family transcriptional regulator ; ligands: FES,MPD ; X-RAY DIFFRACTION 1.68Å

e6y42A1[A:2-160] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Rrf2 family transcriptional regulator ; ligands: FES ; X-RAY DIFFRACTION 4.30Å

e6y42B1[B:2-160] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Rrf2 family transcriptional regulator ; ligands: FES ; X-RAY DIFFRACTION 4.30Å

e6y45B1[B:1-157] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Rrf2 family transcriptional regulator ; ligands: FES,MPD,NA,SO4 ; X-RAY DIFFRACTION 1.68Å

e6y45D1[D:1-157] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Rrf2 family transcriptional regulator ; ligands: FES,MES,MPD,NA ; X-RAY DIFFRACTION 1.68Å

e6y45C1[C:1-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Rrf2 family transcriptional regulator ; ligands: FES,MPD ; X-RAY DIFFRACTION 1.68Å

e7b0cA1[A:1-144] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HTH-type transcriptional repressor NsrR ; ligands: SF4 ; X-RAY DIFFRACTION 3.00Å

e7b0cB1[B:1-144] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HTH-type transcriptional repressor NsrR ; ligands: SF4 ; X-RAY DIFFRACTION 3.00Å

e7zpnA1[A:-7-137] Image Pymol Jmol Links: PDB, SCOP, CATH

HTH-type transcriptional regulator ; ligands: GOL,SO4 ; X-RAY DIFFRACTION 1.940Å

e7zpnB1[B:-7-137] Image Pymol Jmol Links: PDB, SCOP, CATH

HTH-type transcriptional regulator ; ligands: SO4 ; X-RAY DIFFRACTION 1.940Å

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