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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

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

X: Periplasmic binding protein-like II
H: Periplasmic binding protein-like II
T: Periplasmic binding protein-like II
F: LysR_substrate

PF03466 CL0177

Representatives:

e5tpiA1[A:88-160,A:261-292] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH

Putative transcriptional regulator (LysR family) ; ligands: CL,NA ; X-RAY DIFFRACTION 1.47Å

e5tpiA2[A:161-260] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH

Putative transcriptional regulator (LysR family) ; ligands: CL,NA ; X-RAY DIFFRACTION 1.47Å

e1al3A2[A:166-268] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CYS REGULON TRANSCRIPTIONAL ACTIVATOR CYSB ; ligands: SO4 ; X-RAY DIFFRACTION 1.8Å

e1al3A3[A:88-165,A:269-324] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CYS REGULON TRANSCRIPTIONAL ACTIVATOR CYSB ; ligands: SO4 ; X-RAY DIFFRACTION 1.8Å

e2esnA3[A:174-276] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH

probable transcriptional regulator ; X-RAY DIFFRACTION 2.1Å

e2esnA4[A:92-173,A:277-303] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH

probable transcriptional regulator ; X-RAY DIFFRACTION 2.1Å

e1ixcA3[A:163-266] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

LYSR-TYPE REGULATORY PROTEIN ; X-RAY DIFFRACTION 2.2Å

e1ixcA4[A:90-162,A:267-294] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

LYSR-TYPE REGULATORY PROTEIN ; X-RAY DIFFRACTION 2.2Å

e1uthA3[A:86-168,A:272-304] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

LYSR-TYPE REGULATORY PROTEIN ; ligands: SCN ; X-RAY DIFFRACTION 2.2Å

e1i6aA2[A:163-266] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HYDROGEN PEROXIDE-INDUCIBLE GENES ACTIVATOR ; X-RAY DIFFRACTION 2.3Å

e2f7bA2[A:162-267] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HTH-type transcriptional regulator catM ; ligands: CL,SO4 ; X-RAY DIFFRACTION 1.80Å

e2f7cA1[A:162-267] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HTH-type transcriptional regulator catM ; ligands: CCU,SO4 ; X-RAY DIFFRACTION 2.16Å

e3glbA1[A:162-267] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HTH-type transcriptional regulator catM ; ligands: CCU,GOL ; X-RAY DIFFRACTION 2.800Å

e3glbB1[B:162-267] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HTH-type transcriptional regulator catM ; ligands: CCU,GOL,SO4 ; X-RAY DIFFRACTION 2.800Å

e3glbC2[C:162-267] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HTH-type transcriptional regulator catM ; ligands: CCU,GOL ; X-RAY DIFFRACTION 2.800Å

e2h98A2[A:162-267] Image Pymol Jmol Links: PDB, SCOP, CATH

HTH-type transcriptional regulator catM ; ligands: CL ; X-RAY DIFFRACTION 1.800Å

e2h98B2[B:162-267] Image Pymol Jmol Links: PDB, SCOP, CATH

HTH-type transcriptional regulator catM ; X-RAY DIFFRACTION 1.800Å

e3hfuA1[A:163-263] Image Pymol Jmol Links: PDB, SCOP, CATH

HTH-TYPE TRANSCRIPTIONAL REGULATOR CYNR ; ligands: AZI ; X-RAY DIFFRACTION 2.6Å

e3hfuC1[C:163-263] Image Pymol Jmol Links: PDB, SCOP, CATH

HTH-TYPE TRANSCRIPTIONAL REGULATOR CYNR ; ligands: AZI,EDO ; X-RAY DIFFRACTION 2.6Å

e3hfuD2[D:163-263] Image Pymol Jmol Links: PDB, SCOP, CATH

HTH-TYPE TRANSCRIPTIONAL REGULATOR CYNR ; ligands: AZI,EDO ; X-RAY DIFFRACTION 2.6Å

e3ho7A2[A:163-267] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

OXYR ; X-RAY DIFFRACTION 1.58Å

e3ho7B1[B:163-267] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

OXYR ; X-RAY DIFFRACTION 1.58Å

e2hxrA1[A:163-263] Image Pymol Jmol Links: PDB, SCOP, CATH

HTH-type transcriptional regulator cynR ; X-RAY DIFFRACTION 2.05Å

e2hxrB1[B:163-263] Image Pymol Jmol Links: PDB, SCOP, CATH

HTH-type transcriptional regulator cynR ; X-RAY DIFFRACTION 2.05Å

e1i69A1[A:163-266] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HYDROGEN PEROXIDE-INDUCIBLE GENES ACTIVATOR ; ligands: BEZ ; X-RAY DIFFRACTION 2.7Å

e1i69B2[B:1163-1266] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HYDROGEN PEROXIDE-INDUCIBLE GENES ACTIVATOR ; ligands: BEZ ; X-RAY DIFFRACTION 2.7Å

e3jv9B2[B:163-270] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TRANSCRIPTIONAL REGULATOR, LYSR FAMILY ; ligands: CL ; X-RAY DIFFRACTION 2.39Å

e3t22A1[A:163-267] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

REDOX-SENSITIVE TRANSCRIPTIONAL ACTIVATOR OXYR ; X-RAY DIFFRACTION 2.2Å

e3t22B1[B:163-267] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

REDOX-SENSITIVE TRANSCRIPTIONAL ACTIVATOR OXYR ; X-RAY DIFFRACTION 2.2Å

e3t22C2[C:163-267] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

REDOX-SENSITIVE TRANSCRIPTIONAL ACTIVATOR OXYR ; X-RAY DIFFRACTION 2.2Å

e3t22D2[D:163-267] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

REDOX-SENSITIVE TRANSCRIPTIONAL ACTIVATOR OXYR ; X-RAY DIFFRACTION 2.2Å

e3ukiA2[A:163-267] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

OXYR ; X-RAY DIFFRACTION 4.15Å

e3ukiB2[B:163-267] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

OXYR ; X-RAY DIFFRACTION 4.15Å

e3ukiC1[C:163-267] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

OXYR ; X-RAY DIFFRACTION 4.15Å

e3ukiD2[D:163-267] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

OXYR ; X-RAY DIFFRACTION 4.15Å

e4x6gB1[B:163-281] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

OxyR ; ligands: GOL,PEO ; X-RAY DIFFRACTION 2.0Å

e4x6gD1[D:163-281] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

OxyR ; ligands: GOL,PEO ; X-RAY DIFFRACTION 2.0Å

e4x6gF1[F:163-283] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

OxyR ; ligands: GOL,PEO ; X-RAY DIFFRACTION 2.0Å

e5b70A1[A:170-274] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

LysR family transcriptional regulator ; X-RAY DIFFRACTION 2.3Å

e5b70B1[B:170-274] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

LysR family transcriptional regulator ; X-RAY DIFFRACTION 2.3Å

e5b70C1[C:170-274] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

LysR family transcriptional regulator ; ligands: GOL ; X-RAY DIFFRACTION 2.3Å

e5b70D1[D:170-274] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

LysR family transcriptional regulator ; ligands: GOL ; X-RAY DIFFRACTION 2.3Å

e5b7dA1[A:170-274] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

LysR family transcriptional regulator ; ligands: SO4 ; X-RAY DIFFRACTION 1.52Å

e5b7dB1[B:170-274] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

LysR family transcriptional regulator ; ligands: SO4 ; X-RAY DIFFRACTION 1.52Å

e5x0qA2[A:170-274] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

LysR family transcriptional regulator ; ligands: CL ; X-RAY DIFFRACTION 1.55Å

e5x0qB1[B:170-274] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

LysR family transcriptional regulator ; ligands: CL ; X-RAY DIFFRACTION 1.55Å

e5x0vA1[A:170-274] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

LysR family transcriptional regulator ; ligands: CL ; X-RAY DIFFRACTION 1.60Å

e5x0vB2[B:170-274] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

LysR family transcriptional regulator ; ligands: CL ; X-RAY DIFFRACTION 1.60Å

e1i6aA3[A:87-162,A:267-298] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HYDROGEN PEROXIDE-INDUCIBLE GENES ACTIVATOR ; X-RAY DIFFRACTION 2.3Å

e3t1bA2[A:89-159,A:263-290] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Transcriptional regulator, LysR family ; X-RAY DIFFRACTION 2.40Å

e3t1bA3[A:160-262] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Transcriptional regulator, LysR family ; X-RAY DIFFRACTION 2.40Å

e5vvhD1[D:89-161,D:261-298] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Octopine catabolism/uptake operon regulatory protein OccR ; ligands: SO4 ; X-RAY DIFFRACTION 2.5Å

e5vvhD2[D:162-260] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Octopine catabolism/uptake operon regulatory protein OccR ; ligands: FMT ; X-RAY DIFFRACTION 2.5Å

e2fyiA2[A:165-269] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HTH-TYPE TRANSCRIPTIONAL REGULATOR CBL ; X-RAY DIFFRACTION 2.8Å

e2fyiA3[A:88-164,A:270-307] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HTH-TYPE TRANSCRIPTIONAL REGULATOR CBL ; X-RAY DIFFRACTION 2.8Å

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.

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