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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

X: LuxS, MPP, ThrRS/AlaRS common domain

looks like an elaborated ferredoxin

X: ClpS-like

contains a HTH motif

X: ATPase domain of HSP90 chaperone/DNA topoisomerase II/histidine kinase-like
H: ATPase domain of HSP90 chaperone/DNA topoisomerase II/histidine kinase
T: ATPase domain of HSP90 chaperone/DNA topoisomerase II/histidine kinase
F: HATPase_c

PF02518 CL0025

Representatives:

e1i58A1[A:352-540] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CHEMOTAXIS PROTEIN CHEA ; ligands: ACP,ACT,MG ; X-RAY DIFFRACTION 1.6Å

e5m4kA1[A:161-366] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

[Pyruvate dehydrogenase (acetyl-transferring)] kinase isozyme 2, mitochondrial ; ligands: 7F9,MG ; X-RAY DIFFRACTION 2.60Å

e5m4mA2[A:161-366] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

[Pyruvate dehydrogenase (acetyl-transferring)] kinase isozyme 2, mitochondrial ; ligands: 7FW,CL ; X-RAY DIFFRACTION 2.40Å

e5m4nA1[A:161-366] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

[Pyruvate dehydrogenase (acetyl-transferring)] kinase isozyme 2, mitochondrial ; ligands: 7FV,CL ; X-RAY DIFFRACTION 2.60Å

e5m4pA2[A:161-366] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

[Pyruvate dehydrogenase (acetyl-transferring)] kinase isozyme 2, mitochondrial ; ligands: 7FE,CL ; X-RAY DIFFRACTION 2.30Å

e5lfkA1[A:302-455] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Sensor histidine kinase CpxA ; ligands: ATP,MG,SO4 ; X-RAY DIFFRACTION 3.09Å

e5lfkB1[B:302-455] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Sensor histidine kinase CpxA ; ligands: ATP,MG,SO4 ; X-RAY DIFFRACTION 3.09Å

e3omuB1[B:2-207] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Heat shock protein 83 ; ligands: IBD ; X-RAY DIFFRACTION 2.150Å

e1y4uB8[B:15-98,B:120-228] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Chaperone protein htpG ; X-RAY DIFFRACTION 2.9Å

e4z1hA4[A:70-171,A:201-294] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Heat shock protein 75 kDa, mitochondrial ; ligands: 4KP ; X-RAY DIFFRACTION 2.9Å

e5y3nA2[A:70-171,A:201-294] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Heat shock protein 75 kDa, mitochondrial ; ligands: 8MF ; X-RAY DIFFRACTION 2.40Å

e5y3oA3[A:69-170,A:201-293] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Heat shock protein 75 kDa, mitochondrial ; ligands: 8M9 ; X-RAY DIFFRACTION 2.7Å

e6blkA1[A:323-476] Image Pymol Jmol Links: PDB, SCOP, CATH

Signal transduction histidine-protein kinase/phosphatase mprB ; ligands: ATP,MG ; X-RAY DIFFRACTION 1.550Å

e6blkB1[B:323-476] Image Pymol Jmol Links: PDB, SCOP, CATH

Signal transduction histidine-protein kinase/phosphatase mprB ; ligands: ATP,MG ; X-RAY DIFFRACTION 1.550Å

e6blkC1[C:319-476] Image Pymol Jmol Links: PDB, SCOP, CATH

Signal transduction histidine-protein kinase/phosphatase mprB ; ligands: ATP,MG ; X-RAY DIFFRACTION 1.550Å

e6blkD1[D:325-476] Image Pymol Jmol Links: PDB, SCOP, CATH

Signal transduction histidine-protein kinase/phosphatase mprB ; ligands: ATP,MG ; X-RAY DIFFRACTION 1.550Å

e6mi6A1[A:353-539] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Chemotaxis protein CheA ; ligands: JSJ,SO4 ; X-RAY DIFFRACTION 2.95Å

e6mi6B1[B:353-539] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Chemotaxis protein CheA ; ligands: JSJ,SO4 ; X-RAY DIFFRACTION 2.95Å

e6mi6C1[C:353-539] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Chemotaxis protein CheA ; ligands: ADP,SO4 ; X-RAY DIFFRACTION 2.95Å

e6mi6D1[D:353-539] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Chemotaxis protein CheA ; ligands: ADP,SO4 ; X-RAY DIFFRACTION 2.95Å

e6dk8E2[E:481-643] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RetS (Regulator of Exopolysaccharide and Type III Secretion) ; ligands: NI ; X-RAY DIFFRACTION 3.8Å

e6dk7A1[A:481-642] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RetS (Regulator of Exopolysaccharide and Type III Secretion) ; ligands: CO ; X-RAY DIFFRACTION 2.60Å

e6dk7C1[C:481-641] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RetS (Regulator of Exopolysaccharide and Type III Secretion) ; ligands: CO ; X-RAY DIFFRACTION 2.60Å

e6dk7D1[D:481-641] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RetS (Regulator of Exopolysaccharide and Type III Secretion) ; ligands: CO ; X-RAY DIFFRACTION 2.60Å

e6dk7B2[B:481-641] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RetS (Regulator of Exopolysaccharide and Type III Secretion) ; ligands: CO ; X-RAY DIFFRACTION 2.60Å

e6dk7E2[E:481-641] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RetS (Regulator of Exopolysaccharide and Type III Secretion) ; ligands: CO ; X-RAY DIFFRACTION 2.60Å

e6dk7F2[F:481-642] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RetS (Regulator of Exopolysaccharide and Type III Secretion) ; ligands: CO ; X-RAY DIFFRACTION 2.60Å

e6dk7G2[G:481-642] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RetS (Regulator of Exopolysaccharide and Type III Secretion) ; ligands: CO ; X-RAY DIFFRACTION 2.60Å

e6dk7H2[H:481-642] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RetS (Regulator of Exopolysaccharide and Type III Secretion) ; ligands: CO ; X-RAY DIFFRACTION 2.60Å

e6dk8A1[A:481-642] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RetS (Regulator of Exopolysaccharide and Type III Secretion) ; ligands: NI ; X-RAY DIFFRACTION 3.8Å

e6dk8B1[B:481-642] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RetS (Regulator of Exopolysaccharide and Type III Secretion) ; ligands: NI ; X-RAY DIFFRACTION 3.8Å

e6dk8C2[C:481-642] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RetS (Regulator of Exopolysaccharide and Type III Secretion) ; ligands: NI ; X-RAY DIFFRACTION 3.8Å

e6dk8D2[D:481-642] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RetS (Regulator of Exopolysaccharide and Type III Secretion) ; ligands: NI ; X-RAY DIFFRACTION 3.8Å

e6dk8F2[F:481-642] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RetS (Regulator of Exopolysaccharide and Type III Secretion) ; ligands: NI ; X-RAY DIFFRACTION 3.8Å

e6dk8G1[G:481-641] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RetS (Regulator of Exopolysaccharide and Type III Secretion) ; ligands: NI ; X-RAY DIFFRACTION 3.8Å

e6dk8H1[H:481-642] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RetS (Regulator of Exopolysaccharide and Type III Secretion) ; ligands: NI ; X-RAY DIFFRACTION 3.8Å

e6qrjA2[A:78-242] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Hybrid kinase ; ligands: ANP,MG ; X-RAY DIFFRACTION 2.64Å

e6s1kA2[A:325-508] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Chemotaxis protein CheA ; ELECTRON MICROSCOPY

e6s1kB1[B:325-508] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Chemotaxis protein CheA ; ELECTRON MICROSCOPY

e6pajA1[A:429-516,A:546-583] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Sensor protein SrrB ; X-RAY DIFFRACTION 1.990Å

e6pajB1[B:429-516,B:543-583] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Sensor protein SrrB ; ligands: MPD ; X-RAY DIFFRACTION 1.990Å

e7c05A3[A:70-171,A:201-294] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Heat shock protein 75 kDa, mitochondrial ; ligands: FE6 ; X-RAY DIFFRACTION 2.59Å

e6tmpAAA2[AAA:161-370] Image Pymol Jmol Links: PDB, SCOP, CATHDOI

[Pyruvate dehydrogenase (acetyl-transferring)] kinase isozyme 2, mitochondrial ; ligands: MG,NN8 ; X-RAY DIFFRACTION 2.076Å

e6tmqAAA2[AAA:161-369] Image Pymol Jmol Links: PDB, SCOP, CATHDOI

[Pyruvate dehydrogenase (acetyl-transferring)] kinase isozyme 2, mitochondrial ; ligands: DMS,NMW ; X-RAY DIFFRACTION 2.112Å

e6tn2AAA2[AAA:161-370] Image Pymol Jmol Links: PDB, SCOP, CATHDOI

[Pyruvate dehydrogenase (acetyl-transferring)] kinase isozyme 2, mitochondrial ; ligands: CL,DMS,NL8 ; X-RAY DIFFRACTION 1.768Å

e6tmzAAA2[AAA:173-367] Image Pymol Jmol Links: PDB, SCOP, CATHDOI

[Pyruvate dehydrogenase (acetyl-transferring)] kinase isozyme 2, mitochondrial ; ligands: MG,NN8 ; X-RAY DIFFRACTION 2.660Å

e6tn0AAA2[AAA:173-367] Image Pymol Jmol Links: PDB, SCOP, CATHDOI

[Pyruvate dehydrogenase (acetyl-transferring)] kinase isozyme 2, mitochondrial ; ligands: DMS,NLZ ; X-RAY DIFFRACTION 1.905Å

e6linA2[A:182-385] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

[Pyruvate dehydrogenase (acetyl-transferring)] kinase isozyme 2, mitochondrial ; ligands: EH0,GOL,SO4 ; X-RAY DIFFRACTION 2.670Å

e6linB2[B:182-385] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

[Pyruvate dehydrogenase (acetyl-transferring)] kinase isozyme 2, mitochondrial ; ligands: EH0,SO4 ; X-RAY DIFFRACTION 2.670Å

e6linC2[C:182-384] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

[Pyruvate dehydrogenase (acetyl-transferring)] kinase isozyme 2, mitochondrial ; ligands: EH0,PEG ; X-RAY DIFFRACTION 2.670Å

e6linD1[D:181-382] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

[Pyruvate dehydrogenase (acetyl-transferring)] kinase isozyme 2, mitochondrial ; ligands: EH0 ; X-RAY DIFFRACTION 2.670Å

e6lioA2[A:182-382] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

[Pyruvate dehydrogenase (acetyl-transferring)] kinase isozyme 2, mitochondrial ; ligands: EH3,SO4 ; X-RAY DIFFRACTION 1.760Å

e6lioB2[B:182-384] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

[Pyruvate dehydrogenase (acetyl-transferring)] kinase isozyme 2, mitochondrial ; ligands: EH3,GOL,SO4 ; X-RAY DIFFRACTION 1.760Å

e6lilA2[A:182-373] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

[Pyruvate dehydrogenase (acetyl-transferring)] kinase isozyme 2, mitochondrial ; ligands: FLC,GOL,PEG,SO4 ; X-RAY DIFFRACTION 1.930Å

e6lilB1[B:181-373] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

[Pyruvate dehydrogenase (acetyl-transferring)] kinase isozyme 2, mitochondrial ; ligands: FLC,PEG ; X-RAY DIFFRACTION 1.930Å

e6lgqC2[C:733-890] Image Pymol Jmol Links: PDB, SCOP, CATH

Histidine kinase KdpD ; X-RAY DIFFRACTION 3Å

e7cchA1[A:207-357] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

AdeS ; X-RAY DIFFRACTION 2.848Å

e7c7cA2[A:70-171,A:201-294] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Heat shock protein 75 kDa, mitochondrial ; ligands: FK0 ; X-RAY DIFFRACTION 3.00Å

e7vbuA1[A:169-374] Image Pymol Jmol Links: PDB, SCOP, CATHDOI

[Pyruvate dehydrogenase (acetyl-transferring)] kinase isozyme 2, mitochondrial ; ligands: 6I4,ACT,DMS ; X-RAY DIFFRACTION 1.89Å

e7zp0A2[A:330-480] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Sensor protein ; X-RAY DIFFRACTION 1.3980Å

e7zp0B1[B:330-480] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Sensor protein ; X-RAY DIFFRACTION 1.3980Å

e7zp0C2[C:330-480] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Sensor protein ; ligands: EDO ; X-RAY DIFFRACTION 1.3980Å

e7zp0D1[D:330-480] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Sensor protein ; ligands: EDO ; X-RAY DIFFRACTION 1.3980Å

e7zp0E1[E:330-480] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Sensor protein ; ligands: EDO ; X-RAY DIFFRACTION 1.3980Å

e7zp0F1[F:330-480] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Sensor protein ; X-RAY DIFFRACTION 1.3980Å

e7vbvA2[A:169-374] Image Pymol Jmol Links: PDB, SCOP, CATHDOI

[Pyruvate dehydrogenase (acetyl-transferring)] kinase isozyme 2, mitochondrial ; ligands: 67V,ACT,DMS ; X-RAY DIFFRACTION 2.21Å

e7vbvB1[B:169-372] Image Pymol Jmol Links: PDB, SCOP, CATHDOI

[Pyruvate dehydrogenase (acetyl-transferring)] kinase isozyme 2, mitochondrial ; ligands: 67V,ACT,DMS ; X-RAY DIFFRACTION 2.21Å

e7vbxA2[A:169-372] Image Pymol Jmol Links: PDB, SCOP, CATHDOI

[Pyruvate dehydrogenase (acetyl-transferring)] kinase isozyme 2, mitochondrial ; ligands: 5ZP,ACT,DMS ; X-RAY DIFFRACTION 2.6Å

e7ssiA1[A:244-368] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Sensor histidine kinase DesK ; ligands: ACP,MG ; X-RAY DIFFRACTION 3.41Å

e7ssiB2[B:244-367] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Sensor histidine kinase DesK ; ligands: ACP,MG ; X-RAY DIFFRACTION 3.41Å

e7ssiE1[E:244-367] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Sensor histidine kinase DesK ; ligands: ACP,MG ; X-RAY DIFFRACTION 3.41Å

e7ssiD1[D:244-369] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Sensor histidine kinase DesK ; ligands: ACP,MG ; X-RAY DIFFRACTION 3.41Å

e7ssjD2[D:244-369] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Sensor histidine kinase DesK ; ligands: ACP,MG ; X-RAY DIFFRACTION 2.52Å

e7ssjA1[A:244-369] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Sensor histidine kinase DesK ; ligands: ACP,MG ; X-RAY DIFFRACTION 2.52Å

e7ssjC2[C:244-369] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Sensor histidine kinase DesK ; ligands: ACP,MG ; X-RAY DIFFRACTION 2.52Å

e8h70A1[A:247-331,A:364-402] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Phosphate regulon sensor protein PhoR ; ligands: PEG ; X-RAY DIFFRACTION 1.88Å

e8dx0A1[A:210-358] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Histidine kinase ; ligands: MG ; X-RAY DIFFRACTION 1.45Å

e8dx0B1[B:210-358] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Histidine kinase ; ligands: MG ; X-RAY DIFFRACTION 1.45Å

e8egdA1[A:186-306,A:336-382] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

[3-methyl-2-oxobutanoate dehydrogenase [lipoamide]] kinase, mitochondrial ; ligands: ADP,K,MG,SO4,WIH ; X-RAY DIFFRACTION 2.047Å

e8c5vA4[A:325-508] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

; ELECTRON MICROSCOPY

e8iffB5[B:962-1121] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

; ELECTRON MICROSCOPY

e8iskB5[B:965-1125] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

; ELECTRON MICROSCOPY

e8f5zA5[A:962-1119] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

; ELECTRON MICROSCOPY

e8isjA5[A:962-1120] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

; ELECTRON MICROSCOPY

e4r3aB2[B:195-336] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Blue-light-activated histidine kinase 2 ; ligands: ANP,MG ; X-RAY DIFFRACTION 2.920Å

e4r39A1[A:193-343] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Blue-light-activated histidine kinase 2 ; ligands: ANP,MG ; X-RAY DIFFRACTION 2.600Å

e4r39D1[D:193-343] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Blue-light-activated histidine kinase 2 ; ligands: ANP,MG ; X-RAY DIFFRACTION 2.600Å

e4r39B1[B:193-341] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Blue-light-activated histidine kinase 2 ; ligands: ANP,MG ; X-RAY DIFFRACTION 2.600Å

e4r39C1[C:193-340] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Blue-light-activated histidine kinase 2 ; ligands: ANP,MG ; X-RAY DIFFRACTION 2.600Å

e4r3aA1[A:193-338] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Blue-light-activated histidine kinase 2 ; ligands: ANP,MG ; X-RAY DIFFRACTION 2.920Å

Previous

e1id0A1[A:335-480] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PHOQ HISTIDINE KINASE ; ligands: ANP,MG ; X-RAY DIFFRACTION 1.6Å

e1r62A1[A:194-292,A:313-349] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Nitrogen regulation protein NR(II) ; X-RAY DIFFRACTION 1.6Å

e1ysrA1[A:299-446] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH

SENSOR-TYPE HISTIDINE KINASE PRRB ; ligands: GOL,TRS ; X-RAY DIFFRACTION 1.78Å

e1pvgA2[A:7-245] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

DNA topoisomerase II ; ligands: ANP,MG ; X-RAY DIFFRACTION 1.80Å

e2c2aA2[A:321-481] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

SENSOR HISTIDINE KINASE ; ligands: ADP ; X-RAY DIFFRACTION 1.9Å

e1s14A1[A:1027-1217] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Topoisomerase IV subunit B ; ligands: NOV ; X-RAY DIFFRACTION 2.0Å

e2hkjA3[A:10-228] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TYPE II DNA TOPOISOMERASE VI SUBUNIT B ; ligands: MG,RDC ; X-RAY DIFFRACTION 2.0Å

e1gkzA2[A:186-306,A:332-378] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

[3-METHYL-2-OXOBUTANOATE DEHYDROGENASE [LIPOAMIDE]] KINASE ; ligands: ADP,CL,K,MG ; X-RAY DIFFRACTION 2.200Å

e1ei1A2[A:2-220] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

DNA GYRASE B ; ligands: ANP,GOL,SO4 ; X-RAY DIFFRACTION 2.3Å

e1y8oA2[A:177-401] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

[PYRUVATE DEHYDROGENASE [LIPOAMIDE]] KINASE ISOZYME 3 ; ligands: ADP,K,MG ; X-RAY DIFFRACTION 2.48Å

e1jm6A2[A:1177-1366] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PYRUVATE DEHYDROGENASE KINASE, ISOZYME 2 ; ligands: ADP,MG ; X-RAY DIFFRACTION 2.5Å

e4bizD1[D:304-393,D:420-456] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH

SENSOR PROTEIN CPXA ; ligands: SO4 ; X-RAY DIFFRACTION 2.65Å

e4xivB1[B:355-540] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Chemotaxis protein CheA ; ligands: ADP ; X-RAY DIFFRACTION 2.800Å

e3ehfD2[D:244-367] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

SENSOR KINASE (YOCF PROTEIN) ; ligands: ACP,MG ; X-RAY DIFFRACTION 3.1Å

e2q2eB1[B:11-233] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Type 2 DNA topoisomerase 6 subunit B ; X-RAY DIFFRACTION 4.0Å

e1bxdA1[A:290-450] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEIN (OSMOLARITY SENSOR PROTEIN (ENVZ)) ; ligands: ANP ; SOLUTION NMR

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.

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