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
Representatives:
e3etjA2[A:277-355] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Phosphoribosylaminoimidazole carboxylase ATPase subunit ; X-RAY DIFFRACTION 1.60Å
e3k5hA3[A:307-382] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Phosphoribosyl-aminoimidazole carboxylase ; X-RAY DIFFRACTION 2.1Å
e3k5hC2[C:307-382] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Phosphoribosyl-aminoimidazole carboxylase ; X-RAY DIFFRACTION 2.1Å
e3k5iC2[C:307-382] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Phosphoribosyl-aminoimidazole carboxylase ; ligands: AIR ; X-RAY DIFFRACTION 2.0Å
e3k5hB2[B:307-381] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Phosphoribosyl-aminoimidazole carboxylase ; X-RAY DIFFRACTION 2.1Å
e3k5hD2[D:307-381] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Phosphoribosyl-aminoimidazole carboxylase ; X-RAY DIFFRACTION 2.1Å
e3k5iA2[A:307-381] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Phosphoribosyl-aminoimidazole carboxylase ; ligands: AIR ; X-RAY DIFFRACTION 2.0Å
e3k5iB2[B:307-381] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Phosphoribosyl-aminoimidazole carboxylase ; ligands: AIR ; X-RAY DIFFRACTION 2.0Å
e3k5iD2[D:307-380] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Phosphoribosyl-aminoimidazole carboxylase ; ligands: AIR ; X-RAY DIFFRACTION 2.0Å
e4mamA3[A:299-373] Image Pymol Jmol Links: PDB, SCOP, CATH
Phosphoribosylaminoimidazole carboxylase, ATPase subunit ; ligands: A12,GOL ; X-RAY DIFFRACTION 1.474Å
e4ma0A3[A:299-366] Image Pymol Jmol Links: PDB, SCOP, CATH
PHOSPHORIBOSYLAMINOIMIDAZOLE CARBOXYLASE, ATPASE SUBUNIT ; ligands: PEG ; X-RAY DIFFRACTION 1.98Å
e4m9uA2[A:299-365] Image Pymol Jmol Links: PDB, SCOP, CATH
PHOSPHORIBOSYLAMINOIMIDAZOLE CARBOXYLASE, ATPASE SUBUNIT ; ligands: ACT,CL,FMT ; X-RAY DIFFRACTION 1.6Å
e4ma5A6[A:299-365] Image Pymol Jmol Links: PDB, SCOP, CATH
Phosphoribosylaminoimidazole carboxylase, ATPase subunit ; ligands: GOL ; X-RAY DIFFRACTION 1.809Å
e4mamB2[B:299-365] Image Pymol Jmol Links: PDB, SCOP, CATH
Phosphoribosylaminoimidazole carboxylase, ATPase subunit ; ligands: GOL ; X-RAY DIFFRACTION 1.474Å
e5jqwA1[A:299-365] Image Pymol Jmol Links: PDB, SCOP, CATH
N5-carboxyaminoimidazole ribonucleotide synthase ; ligands: ACT ; X-RAY DIFFRACTION 2.06Å
e3ax6A9[A:297-373] Image Pymol Jmol Links: PDB, SCOP, CATH
PHOSPHORIBOSYLAMINOIMIDAZOLE CARBOXYLASE, ATPASE SUBUNIT ; X-RAY DIFFRACTION 2.2Å
e3ax6B9[B:297-373] Image Pymol Jmol Links: PDB, SCOP, CATH
PHOSPHORIBOSYLAMINOIMIDAZOLE CARBOXYLASE, ATPASE SUBUNIT ; X-RAY DIFFRACTION 2.2Å
e3ax6D9[D:297-373] Image Pymol Jmol Links: PDB, SCOP, CATH
PHOSPHORIBOSYLAMINOIMIDAZOLE CARBOXYLASE, ATPASE SUBUNIT ; X-RAY DIFFRACTION 2.2Å
e3ax6C2[C:297-373] Image Pymol Jmol Links: PDB, SCOP, CATH
PHOSPHORIBOSYLAMINOIMIDAZOLE CARBOXYLASE, ATPASE SUBUNIT ; X-RAY DIFFRACTION 2.2Å
e1b6rA2[A:277-355] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PROTEIN (N5-CARBOXYAMINOIMIDAZOLE RIBONUCLEOTIDE SYNTHETASE) ; ligands: SO4 ; X-RAY DIFFRACTION 2.1Å
e1b6sA2[A:277-355] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PROTEIN (N5-CARBOXYAMINOIMIDAZOLE RIBONUCLEOTIDE SYNTHETASE) ; X-RAY DIFFRACTION 2.5Å
e1b6sB2[B:277-355] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PROTEIN (N5-CARBOXYAMINOIMIDAZOLE RIBONUCLEOTIDE SYNTHETASE) ; X-RAY DIFFRACTION 2.5Å
e1b6sC2[C:277-355] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PROTEIN (N5-CARBOXYAMINOIMIDAZOLE RIBONUCLEOTIDE SYNTHETASE) ; X-RAY DIFFRACTION 2.5Å
e1b6sD2[D:277-355] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PROTEIN (N5-CARBOXYAMINOIMIDAZOLE RIBONUCLEOTIDE SYNTHETASE) ; X-RAY DIFFRACTION 2.5Å
e3ethA2[A:277-355] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Phosphoribosylaminoimidazole carboxylase ATPase subunit ; X-RAY DIFFRACTION 1.6Å
e3ethB2[B:277-355] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Phosphoribosylaminoimidazole carboxylase ATPase subunit ; X-RAY DIFFRACTION 1.6Å
e3etjB2[B:277-355] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Phosphoribosylaminoimidazole carboxylase ATPase subunit ; X-RAY DIFFRACTION 1.60Å
e3aw8A3[A:296-366] Image Pymol Jmol Links: PDB, SCOP, CATH
Phosphoribosylaminoimidazole carboxylase, ATPase subunit ; ligands: CL ; X-RAY DIFFRACTION 2.60Å
e3aw8B2[B:290-360] Image Pymol Jmol Links: PDB, SCOP, CATH
Phosphoribosylaminoimidazole carboxylase, ATPase subunit ; ligands: CL ; X-RAY DIFFRACTION 2.60Å
e4e4tA6[A:315-398] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PHOSPHORIBOSYLAMINOIMIDAZOLE CARBOXYLASE, ATPASE SUBUNIT ; ligands: SO4 ; X-RAY DIFFRACTION 1.55Å
e4izoA6[A:315-397] Image Pymol Jmol Links: PDB, SCOP, CATH
PHOSPHORIBOSYLAMINOIMIDAZOLE CARBOXYLASE, ATPASE SUBUNIT ; X-RAY DIFFRACTION 1.85Å
e4e4tB8[B:315-398] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PHOSPHORIBOSYLAMINOIMIDAZOLE CARBOXYLASE, ATPASE SUBUNIT ; ligands: SO4 ; X-RAY DIFFRACTION 1.55Å
e2z04B3[B:289-356] Image Pymol Jmol Links: PDB, SCOP, CATH
PHOSPHORIBOSYLAMINOIMIDAZOLE CARBOXYLASE ATPASE SUBUNIT ; ligands: SO4 ; X-RAY DIFFRACTION 2.35Å
e3r5hA6[A:308-383] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Phosphoribosylaminoimidazole carboxylase, ATPase subunit ; ligands: AIR ; X-RAY DIFFRACTION 2.200Å
e3v4sA6[A:308-381] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Phosphoribosylaminoimidazole carboxylase, ATPase subunit ; ligands: CO3 ; X-RAY DIFFRACTION 2.02Å
e3v4sB6[B:308-380] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Phosphoribosylaminoimidazole carboxylase, ATPase subunit ; ligands: CO3 ; X-RAY DIFFRACTION 2.02Å
e4dlkB6[B:308-380] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Phosphoribosylaminoimidazole carboxylase, ATPase subunit ; X-RAY DIFFRACTION 2.02Å
e3q2oB6[B:308-377] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PHOSPHORIBOSYLAMINOIMIDAZOLE CARBOXYLASE, ATPASE SUBUNIT ; X-RAY DIFFRACTION 1.96Å
e3qffA6[A:308-377] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
N5-carboxyaminoimidazole ribonucleotide synthetase ; X-RAY DIFFRACTION 1.960Å
e3qffB6[B:308-377] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
N5-carboxyaminoimidazole ribonucleotide synthetase ; X-RAY DIFFRACTION 1.960Å
e3r5hB6[B:308-377] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Phosphoribosylaminoimidazole carboxylase, ATPase subunit ; ligands: AIR ; X-RAY DIFFRACTION 2.200Å
e4dlkA1[A:308-380] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Phosphoribosylaminoimidazole carboxylase, ATPase subunit ; ligands: ATP ; X-RAY DIFFRACTION 2.02Å
e3q2oA2[A:308-377] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PHOSPHORIBOSYLAMINOIMIDAZOLE CARBOXYLASE, ATPASE SUBUNIT ; X-RAY DIFFRACTION 1.96Å
e3orqA1[A:307-371] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
N5-CARBOXYAMINOIMIDAZOLE RIBONUCLEOTIDE SYNTHETASE ; ligands: POP ; X-RAY DIFFRACTION 2.23Å
e3orqB1[B:307-374] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
N5-CARBOXYAMINOIMIDAZOLE RIBONUCLEOTIDE SYNTHETASE ; ligands: POP ; X-RAY DIFFRACTION 2.23Å
e2z04A1[A:289-354] Image Pymol Jmol Links: PDB, SCOP, CATH
PHOSPHORIBOSYLAMINOIMIDAZOLE CARBOXYLASE ATPASE SUBUNIT ; ligands: SO4 ; X-RAY DIFFRACTION 2.35Å
e3orrB1[B:307-372] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
N5-CARBOXYAMINOIMIDAZOLE RIBONUCLEOTIDE SYNTHETASE ; X-RAY DIFFRACTION 2.23Å
e3orrA1[A:307-371] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
N5-CARBOXYAMINOIMIDAZOLE RIBONUCLEOTIDE SYNTHETASE ; X-RAY DIFFRACTION 2.23Å
Pseudo group of domains that do not map to PFam family profiles. Domains inside should not be considered as in one family.
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