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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: HTH_IclR

PF09339 CL0123

Representatives:

e1mkmA1[A:1-75] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

IclR transcriptional regulator ; ligands: FMT ; X-RAY DIFFRACTION 2.200Å

e2xrnA2[A:14-86] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HTH-TYPE TRANSCRIPTIONAL REGULATOR TTGV ; X-RAY DIFFRACTION 2.9Å

e5h1aA1[A:29-83] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

IclR transcription factor homolog ; ligands: PO4 ; X-RAY DIFFRACTION 2.1Å

e5h1aB2[B:29-83] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

IclR transcription factor homolog ; X-RAY DIFFRACTION 2.1Å

e3r4kA1[A:1-69] Image Pymol Jmol Links: PDB, SCOP, CATH

Transcriptional regulator, IclR family ; ligands: EDO ; X-RAY DIFFRACTION 2.46Å

e2g7uC1[C:9-80] Image Pymol Jmol Links: PDB, SCOP, CATH

transcriptional regulator ; X-RAY DIFFRACTION 2.30Å

e5h1aC2[C:29-83] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

IclR transcription factor homolog ; X-RAY DIFFRACTION 2.1Å

e5h1aD2[D:29-83] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

IclR transcription factor homolog ; X-RAY DIFFRACTION 2.1Å

e2g7uD1[D:9-80] Image Pymol Jmol Links: PDB, SCOP, CATH

transcriptional regulator ; X-RAY DIFFRACTION 2.30Å

e2ia2B1[B:17-90] Image Pymol Jmol Links: PDB, SCOP, CATH

Putative Transcriptional Regulator ; X-RAY DIFFRACTION 2.1Å

e4asoA1[A:6-98] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TUBR FROM BACILLUS THURINGIENSIS PBTOXIS ; X-RAY DIFFRACTION 7.0Å

e3m8eB1[B:4-96] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Putative DNA-binding protein ; X-RAY DIFFRACTION 2.000Å

e2ia2C1[C:17-90] Image Pymol Jmol Links: PDB, SCOP, CATH

Putative Transcriptional Regulator ; X-RAY DIFFRACTION 2.1Å

e2xrnB1[B:13-86] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HTH-TYPE TRANSCRIPTIONAL REGULATOR TTGV ; X-RAY DIFFRACTION 2.9Å

e3m9aA1[A:6-98] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Putative DNA-binding protein ; X-RAY DIFFRACTION 2.50Å

e4asoN2[N:6-98] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TUBR FROM BACILLUS THURINGIENSIS PBTOXIS ; X-RAY DIFFRACTION 7.0Å

e2xroA1[A:15-86] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HTH-TYPE TRANSCRIPTIONAL REGULATOR TTGV ; X-RAY DIFFRACTION 3.4Å

e4assB2[B:6-98] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TUBR FROM BACILLUS THURINGIENSIS PBTOXIS ; X-RAY DIFFRACTION 7.0Å

e2xroB1[B:14-86] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HTH-TYPE TRANSCRIPTIONAL REGULATOR TTGV ; X-RAY DIFFRACTION 3.4Å

e2xroE1[E:15-86] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HTH-TYPE TRANSCRIPTIONAL REGULATOR TTGV ; X-RAY DIFFRACTION 3.4Å

e4assH2[H:6-98] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TUBR FROM BACILLUS THURINGIENSIS PBTOXIS ; X-RAY DIFFRACTION 7.0Å

e2xroF1[F:14-86] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HTH-TYPE TRANSCRIPTIONAL REGULATOR TTGV ; X-RAY DIFFRACTION 3.4Å

e4asoI2[I:6-98] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TUBR FROM BACILLUS THURINGIENSIS PBTOXIS ; X-RAY DIFFRACTION 7.0Å

e4assG2[G:6-98] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TUBR FROM BACILLUS THURINGIENSIS PBTOXIS ; X-RAY DIFFRACTION 7.0Å

e3r4kB1[B:2-69] Image Pymol Jmol Links: PDB, SCOP, CATH

Transcriptional regulator, IclR family ; X-RAY DIFFRACTION 2.46Å

e4assF2[F:6-98] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TUBR FROM BACILLUS THURINGIENSIS PBTOXIS ; X-RAY DIFFRACTION 7.0Å

e3r4kC1[C:1-69] Image Pymol Jmol Links: PDB, SCOP, CATH

Transcriptional regulator, IclR family ; ligands: EDO ; X-RAY DIFFRACTION 2.46Å

e4asoL2[L:6-98] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TUBR FROM BACILLUS THURINGIENSIS PBTOXIS ; X-RAY DIFFRACTION 7.0Å

e3r4kD1[D:1-69] Image Pymol Jmol Links: PDB, SCOP, CATH

Transcriptional regulator, IclR family ; ligands: EDO ; X-RAY DIFFRACTION 2.46Å

e2g7uA1[A:5-80] Image Pymol Jmol Links: PDB, SCOP, CATH

transcriptional regulator ; X-RAY DIFFRACTION 2.30Å

e4asoG2[G:6-98] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TUBR FROM BACILLUS THURINGIENSIS PBTOXIS ; X-RAY DIFFRACTION 7.0Å

e2ia2A2[A:16-90] Image Pymol Jmol Links: PDB, SCOP, CATH

Putative Transcriptional Regulator ; X-RAY DIFFRACTION 2.1Å

e4assD2[D:6-98] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TUBR FROM BACILLUS THURINGIENSIS PBTOXIS ; X-RAY DIFFRACTION 7.0Å

e2o0yD1[D:8-91] Image Pymol Jmol Links: PDB, SCOP, CATH

Transcriptional regulator ; X-RAY DIFFRACTION 2.00Å

e4assA2[A:6-98] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TUBR FROM BACILLUS THURINGIENSIS PBTOXIS ; X-RAY DIFFRACTION 7.0Å

e2g7uB1[B:6-80] Image Pymol Jmol Links: PDB, SCOP, CATH

transcriptional regulator ; X-RAY DIFFRACTION 2.30Å

e4asoJ2[J:6-98] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TUBR FROM BACILLUS THURINGIENSIS PBTOXIS ; X-RAY DIFFRACTION 7.0Å

e1mkmB1[B:1-75] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

IclR transcriptional regulator ; ligands: FMT ; X-RAY DIFFRACTION 2.200Å

e4asoP2[P:6-98] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TUBR FROM BACILLUS THURINGIENSIS PBTOXIS ; X-RAY DIFFRACTION 7.0Å

e4assI2[I:6-98] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TUBR FROM BACILLUS THURINGIENSIS PBTOXIS ; X-RAY DIFFRACTION 7.0Å

e2ia2D1[D:16-90] Image Pymol Jmol Links: PDB, SCOP, CATH

Putative Transcriptional Regulator ; X-RAY DIFFRACTION 2.1Å

e4assC2[C:6-98] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TUBR FROM BACILLUS THURINGIENSIS PBTOXIS ; X-RAY DIFFRACTION 7.0Å

e3mq0A1[A:20-100] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Transcriptional repressor of the blcABC operon ; X-RAY DIFFRACTION 1.79Å

e2o0yB1[B:17-91] Image Pymol Jmol Links: PDB, SCOP, CATH

Transcriptional regulator ; X-RAY DIFFRACTION 2.00Å

e4asoH2[H:6-98] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TUBR FROM BACILLUS THURINGIENSIS PBTOXIS ; X-RAY DIFFRACTION 7.0Å

e4asoM2[M:6-98] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TUBR FROM BACILLUS THURINGIENSIS PBTOXIS ; X-RAY DIFFRACTION 7.0Å

e3mq0B1[B:23-98] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Transcriptional repressor of the blcABC operon ; X-RAY DIFFRACTION 1.79Å

e4asoO2[O:6-98] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TUBR FROM BACILLUS THURINGIENSIS PBTOXIS ; X-RAY DIFFRACTION 7.0Å

e2o0yA1[A:18-91] Image Pymol Jmol Links: PDB, SCOP, CATH

Transcriptional regulator ; X-RAY DIFFRACTION 2.00Å

e4asoK2[K:6-98] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TUBR FROM BACILLUS THURINGIENSIS PBTOXIS ; X-RAY DIFFRACTION 7.0Å

e2o0yC2[C:6-91] Image Pymol Jmol Links: PDB, SCOP, CATH

Transcriptional regulator ; X-RAY DIFFRACTION 2.00Å

e5tjjA2[A:1-78] Image Pymol Jmol Links: PDB, SCOP, CATH

Transcriptional regulator, IclR family ; X-RAY DIFFRACTION 2.50Å

e4assE2[E:6-98] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TUBR FROM BACILLUS THURINGIENSIS PBTOXIS ; X-RAY DIFFRACTION 7.0Å

e4asoD2[D:6-98] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TUBR FROM BACILLUS THURINGIENSIS PBTOXIS ; X-RAY DIFFRACTION 7.0Å

e5tjjB1[B:3-78] Image Pymol Jmol Links: PDB, SCOP, CATH

Transcriptional regulator, IclR family ; X-RAY DIFFRACTION 2.50Å

e5whmA2[A:-2-92] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

IclR family transcriptional regulator ; ligands: ACY,EDO ; X-RAY DIFFRACTION 1.95Å

e4asoB2[B:6-98] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TUBR FROM BACILLUS THURINGIENSIS PBTOXIS ; X-RAY DIFFRACTION 7.0Å

e5whmB1[B:-2-92] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

IclR family transcriptional regulator ; ligands: ACY ; X-RAY DIFFRACTION 1.95Å

e4asoF2[F:6-98] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TUBR FROM BACILLUS THURINGIENSIS PBTOXIS ; X-RAY DIFFRACTION 7.0Å

e5whmC1[C:-2-92] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

IclR family transcriptional regulator ; ligands: ACY,EDO ; X-RAY DIFFRACTION 1.95Å

e4asoC2[C:6-98] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TUBR FROM BACILLUS THURINGIENSIS PBTOXIS ; X-RAY DIFFRACTION 7.0Å

e5whmD1[D:-1-92] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

IclR family transcriptional regulator ; ligands: ACY ; X-RAY DIFFRACTION 1.95Å

e4asoE2[E:6-98] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TUBR FROM BACILLUS THURINGIENSIS PBTOXIS ; X-RAY DIFFRACTION 7.0Å

e5w1eA3[A:269-372] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Putative transcriptional regulator ; ligands: GOL ; X-RAY DIFFRACTION 2.06Å

e7cuoA1[A:29-83] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Transcription factor ; ligands: SO4 ; X-RAY DIFFRACTION 2.0Å

e7cuoB1[B:29-83] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Transcription factor ; ligands: SO4 ; X-RAY DIFFRACTION 2.0Å

e5w1eA4[A:12-93] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

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

e5y6iA2[A:16-88] Image Pymol Jmol Links: PDB, SCOP, CATH

Transcriptional regulator KdgR ; X-RAY DIFFRACTION 2.50Å

e5y6iB2[B:16-88] Image Pymol Jmol Links: PDB, SCOP, CATH

Transcriptional regulator KdgR ; X-RAY DIFFRACTION 2.50Å

e7dqbA1[A:9-83] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

IclR homolog ; X-RAY DIFFRACTION 2.1Å

e7dqbB2[B:9-83] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

IclR homolog ; X-RAY DIFFRACTION 2.1Å

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