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
mixed a+b and a/balpha and beta domain consists of both a+b and a/b regions
Representatives:
e1woqA1[A:11-139] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Inorganic polyphosphate/ATP-glucomannokinase ; ligands: BGC,PO4 ; X-RAY DIFFRACTION 1.8Å
e2ap1A1[A:118-303] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH
putative regulator protein ; ligands: ZN ; X-RAY DIFFRACTION 1.9Å
e2ap1A2[A:1-117] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH
putative regulator protein ; X-RAY DIFFRACTION 1.9Å
e1z05A2[A:209-405] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH
transcriptional regulator, ROK family ; ligands: BME,GOL,SO4,ZN ; X-RAY DIFFRACTION 2.0Å
e1z05A3[A:81-208] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH
transcriptional regulator, ROK family ; ligands: SO4 ; X-RAY DIFFRACTION 2.0Å
e2gupA1[A:1-114] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH
ROK FAMILY PROTEIN ; ligands: SUC,TRS ; X-RAY DIFFRACTION 2.01Å
e2gupA2[A:115-289] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH
ROK FAMILY PROTEIN ; ligands: SUC ; X-RAY DIFFRACTION 2.01Å
e1xc3A1[A:1-118] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Putative fructokinase ; ligands: GOL,PT ; X-RAY DIFFRACTION 2.1Å
e1xc3A2[A:119-294] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Putative fructokinase ; ligands: GOL,ZN ; X-RAY DIFFRACTION 2.1Å
e1woqB2[B:140-263] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Inorganic polyphosphate/ATP-glucomannokinase ; ligands: BGC,PO4 ; X-RAY DIFFRACTION 1.8Å
e1z6rA3[A:211-406] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Mlc protein ; ligands: ZN ; X-RAY DIFFRACTION 2.7Å
e3vgkA2[A:118-313] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
GLUCOKINASE ; ligands: ZN ; X-RAY DIFFRACTION 3.25Å
e4db3A1[A:96-303] Image Pymol Jmol Links: PDB, SCOP, CATH
N-acetyl-D-glucosamine kinase ; ligands: CL,GOL,SO4,ZN ; X-RAY DIFFRACTION 1.95Å
e4htlA2[A:117-291] Image Pymol Jmol Links: PDB, SCOP, CATH
Beta-glucoside kinase ; ligands: EDO ; X-RAY DIFFRACTION 1.640Å
e3vgkB2[B:118-313] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
GLUCOKINASE ; ligands: SO4,ZN ; X-RAY DIFFRACTION 3.25Å
e3vgkD2[D:118-313] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
GLUCOKINASE ; ligands: ZN ; X-RAY DIFFRACTION 3.25Å
e3vgkG2[G:118-313] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
GLUCOKINASE ; ligands: ZN ; X-RAY DIFFRACTION 3.25Å
e3vglA2[A:118-313] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
GLUCOKINASE ; ligands: ANP,BGC,NA,ZN ; X-RAY DIFFRACTION 1.55Å
e3vgmA2[A:118-313] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
GLUCOKINASE ; ligands: BGC,K,ZN ; X-RAY DIFFRACTION 1.84Å
e3vgkC2[C:118-312] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
GLUCOKINASE ; ligands: ZN ; X-RAY DIFFRACTION 3.25Å
e3vgkE2[E:118-312] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
GLUCOKINASE ; ligands: SO4,ZN ; X-RAY DIFFRACTION 3.25Å
e3vgkF2[F:118-312] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
GLUCOKINASE ; ligands: ZN ; X-RAY DIFFRACTION 3.25Å
e3vgkH2[H:118-312] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
GLUCOKINASE ; ligands: ZN ; X-RAY DIFFRACTION 3.25Å
e1z6rB3[B:211-406] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Mlc protein ; ligands: ZN ; X-RAY DIFFRACTION 2.7Å
e1z6rC3[C:211-406] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Mlc protein ; ligands: ZN ; X-RAY DIFFRACTION 2.7Å
e1z6rD3[D:211-406] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Mlc protein ; ligands: ZN ; X-RAY DIFFRACTION 2.7Å
e3bp8A3[A:211-406] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PUTATIVE NAGC-LIKE TRANSCRIPTIONAL REGULATOR ; ligands: ACT,ZN ; X-RAY DIFFRACTION 2.85Å
e3bp8B3[B:211-406] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PUTATIVE NAGC-LIKE TRANSCRIPTIONAL REGULATOR ; ligands: ACT,ZN ; X-RAY DIFFRACTION 2.85Å
e3lm9A2[A:119-293] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
fructokinase ; ligands: ADP,FRU,ZN ; X-RAY DIFFRACTION 2.45Å
e3ohrA2[A:119-293] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PUTATIVE FRUCTOKINASE ; ligands: ADP,ZN ; X-RAY DIFFRACTION 1.66Å
e2aa4B2[B:120-289] Image Pymol Jmol Links: PDB, SCOP, CATH
Putative N-acetylmannosamine kinase ; ligands: ZN ; X-RAY DIFFRACTION 2.200Å
e2yhyA4[A:529-717] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
BIFUNCTIONAL UDP-N-ACETYLGLUCOSAMINE 2-EPIMERASE/N-ACETYLMANNOSAMINE KINASE ; ligands: ADP,BM3,CA,EDO,PG4,ZN ; X-RAY DIFFRACTION 1.82Å
e4ijaB4[B:180-376] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
XylR protein ; ligands: GOL,K ; X-RAY DIFFRACTION 2.1Å
e3htvA2[A:130-163,A:185-195,A:215-302] Image Pymol Jmol Links: PDB, SCOP, CATH
D-allose kinase ; X-RAY DIFFRACTION 1.95Å
e2yi1A6[A:529-717] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
BIFUNCTIONAL UDP-N-ACETYLGLUCOSAMINE 2-EPIMERASE/N-ACETYLMANNOSAMINE KINASE ; ligands: ACT,ADP,BM3,BMX,CA,EDO,ZN ; X-RAY DIFFRACTION 2.15Å
e2yhwA4[A:529-717] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
BIFUNCTIONAL UDP-N-ACETYLGLUCOSAMINE 2-EPIMERASE/N-ACETYLMANNOSAMINE KINASE ; ligands: ACT,BM3,CA,EDO,ZN ; X-RAY DIFFRACTION 1.64Å
e3eo3A6[A:534-717] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Bifunctional UDP-N-acetylglucosamine 2-epimerase/N-acetylmannosamine kinase ; ligands: UNX,ZN ; X-RAY DIFFRACTION 2.840Å
e3eo3C6[C:534-717] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Bifunctional UDP-N-acetylglucosamine 2-epimerase/N-acetylmannosamine kinase ; ligands: UNX,ZN ; X-RAY DIFFRACTION 2.840Å
e3eo3B6[B:534-717] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Bifunctional UDP-N-acetylglucosamine 2-epimerase/N-acetylmannosamine kinase ; ligands: UNX,ZN ; X-RAY DIFFRACTION 2.840Å
e4ijaA2[A:180-376] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
XylR protein ; ligands: GOL,K,PO4 ; X-RAY DIFFRACTION 2.1Å
e6jdbA1[A:119-291] Image Pymol Jmol Links: PDB, SCOP, CATHDOI
N-acetylmannosamine kinase ; ligands: ADP,BMX,ZN ; X-RAY DIFFRACTION 2.640Å
e6jdcA1[A:119-188,A:210-290] Image Pymol Jmol Links: PDB, SCOP, CATHDOI
N-acetylmannosamine kinase ; ligands: BM3,ZN ; X-RAY DIFFRACTION 2.220Å
e6jdhA1[A:119-293] Image Pymol Jmol Links: PDB, SCOP, CATHDOI
N-acetylmannosamine kinase ; ligands: ZN ; X-RAY DIFFRACTION 1.900Å
e6jdaA1[A:119-291] Image Pymol Jmol Links: PDB, SCOP, CATHDOI
N-acetylmannosamine kinase ; ligands: BM3,GOL,ZN ; X-RAY DIFFRACTION 2.900Å
e6jdhB1[B:119-291] Image Pymol Jmol Links: PDB, SCOP, CATHDOI
N-acetylmannosamine kinase ; ligands: ZN ; X-RAY DIFFRACTION 1.900Å
e6jdoA2[A:119-293] Image Pymol Jmol Links: PDB, SCOP, CATHDOI
N-acetylmannosamine kinase ; ligands: ANP,CA ; X-RAY DIFFRACTION 2.000Å
e6jdoB1[B:119-291] Image Pymol Jmol Links: PDB, SCOP, CATHDOI
N-acetylmannosamine kinase ; ligands: ANP,CA ; X-RAY DIFFRACTION 2.000Å
e2aa4A1[A:1-119] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH
Putative N-acetylmannosamine kinase ; X-RAY DIFFRACTION 2.200Å
e2aa4A2[A:120-289] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH
Putative N-acetylmannosamine kinase ; ligands: ZN ; X-RAY DIFFRACTION 2.200Å
e2hoeA2[A:200-368] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH
N-acetylglucosamine kinase ; ligands: GOL,K ; X-RAY DIFFRACTION 2.460Å
Pseudo group of domains that do not map to PFam family profiles. Domains inside should not be considered as in one family.
few secondary structure elementsstabilized by cofactors or disulfides
extended segmentsextended, non-globular segments, frequently bind to other proteins to form complexes