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
looks like an elaborated ferredoxin
contains a HTH motif
Pseudo group of domains that do not map to PFam family profiles. Domains inside should not be considered as in one family.
Representatives:
e1gqeA4[A:313-365] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
RELEASE FACTOR 2 ; X-RAY DIFFRACTION 1.81Å
e1rq0A4[A:279-333] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptide chain release factor 1 ; X-RAY DIFFRACTION 2.65Å
e1rq0B4[B:668,B:679-732] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptide chain release factor 1 ; X-RAY DIFFRACTION 2.65Å
e1rq0C4[C:1068,C:1079-1132] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptide chain release factor 1 ; X-RAY DIFFRACTION 2.65Å
e2fvoA4[A:268,A:279-332] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptide chain release factor 1 ; ELECTRON MICROSCOPY
e2b3tB6[B:303-354] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptide chain release factor 1 ; X-RAY DIFFRACTION 3.10Å
e2b9mY4[Y:301-365] Image Pymol Jmol Links: PDB, SCOP, CATH Obsolete PDB
e2ihr17[1:297-351] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PEPTIDE CHAIN RELEASE FACTOR 2 ; X-RAY DIFFRACTION 2.5Å
e4kfhY11[Y:315-378] Image Pymol Jmol Links: PDB, SCOP, CATH Obsolete PDB
e4kfkY7[Y:315-378] Image Pymol Jmol Links: PDB, SCOP, CATH Obsolete PDB
; ligands: MG
e3f1eX7[X:316-378] Image Pymol Jmol Links: PDB, SCOP, CATH Obsolete PDB
; ligands: MG
e3f1gX11[X:316-378] Image Pymol Jmol Links: PDB, SCOP, CATH Obsolete PDB
e2wh1Y7[Y:302-356] Image Pymol Jmol Links: PDB, SCOP, CATH Obsolete PDB
e2wh3Y7[Y:302-356] Image Pymol Jmol Links: PDB, SCOP, CATH Obsolete PDB
e2x9rY7[Y:302-356] Image Pymol Jmol Links: PDB, SCOP, CATH Obsolete PDB
e2x9tY7[Y:302-356] Image Pymol Jmol Links: PDB, SCOP, CATH Obsolete PDB
e4v4sAY3[AY:301-365] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptide chain release factor 2 ; X-RAY DIFFRACTION 6.76Å
e4v5jAY3[AY:301-356] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PEPTIDE CHAIN RELEASE FACTOR 2 ; X-RAY DIFFRACTION 3.10Å
e4v5jCY3[CY:301-356] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PEPTIDE CHAIN RELEASE FACTOR 2 ; X-RAY DIFFRACTION 3.10Å
e4v9nAY3[AY:315-378] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Bacterial peptide chain release factor 2 (RF-2) ; X-RAY DIFFRACTION 3.400Å
e4v9nCY3[CY:315-378] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Bacterial peptide chain release factor 2 (RF-2) ; ligands: MG ; X-RAY DIFFRACTION 3.400Å
e4v67AX3[AX:316-378] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Bacterial peptide chain release factor 2 (RF-2) ; ligands: MG ; X-RAY DIFFRACTION 3.00Å
e4v67CX3[CX:316-378] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Bacterial peptide chain release factor 2 (RF-2) ; X-RAY DIFFRACTION 3.00Å
e4v5eAY4[AY:302-356] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PEPTIDE CHAIN RELEASE FACTOR 2 ; X-RAY DIFFRACTION 3.45Å
e4v5eCY4[CY:302-356] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PEPTIDE CHAIN RELEASE FACTOR 2 ; X-RAY DIFFRACTION 3.45Å
e5mdy72[7:316-369] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptide chain release factor 2 ; ELECTRON MICROSCOPY
e6bokGD2[GD:291-358] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptide chain release factor 1 ; ligands: MG ; X-RAY DIFFRACTION 3.55Å
e6b4vJA3[JA:291-358] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptide chain release factor 1 ; ligands: MG ; X-RAY DIFFRACTION 3.4Å
e6b4vNC1[NC:291-358] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptide chain release factor 1 ; ligands: MG ; X-RAY DIFFRACTION 3.4Å
e6c5lAY2[AY:301-356] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptide chain release factor 2 ; X-RAY DIFFRACTION 3.2Å
e6c5lCY1[CY:301-356] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptide chain release factor 2 ; X-RAY DIFFRACTION 3.2Å
e6c4iv4[v:313-365] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptide chain release factor 2 ; ELECTRON MICROSCOPY
e6bokHD2[HD:291-358] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptide chain release factor 1 ; ligands: MG ; X-RAY DIFFRACTION 3.55Å
e6bohKA1[KA:305-359] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptide chain release factor 1 ; ligands: MG ; X-RAY DIFFRACTION 3.4Å
e6bohPC1[PC:305-359] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptide chain release factor 1 ; ligands: MG ; X-RAY DIFFRACTION 3.4Å
e6dncMA2[MA:297-356] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptide chain release factor 1 ; ELECTRON MICROSCOPY
e6gxnv4[v:297-351] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptide chain release factor RF1 ; ELECTRON MICROSCOPY
e6gxmv2[v:291-351] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptide chain release factor RF1 ; ELECTRON MICROSCOPY
e6gwtv2[v:291-351] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptide chain release factor RF1 ; ELECTRON MICROSCOPY
e6gxov1[v:291-351] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptide chain release factor RF1 ; ELECTRON MICROSCOPY
e6orlA1[A:291-356] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptide chain release factor 1 ; ELECTRON MICROSCOPY
e6ost73[7:313-365] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptide chain release factor 2 ; ELECTRON MICROSCOPY
e6ot3A1[A:313-362] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptide chain release factor 2 ; ELECTRON MICROSCOPY
e6ouoA3[A:313-362] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptide chain release factor 2 ; ELECTRON MICROSCOPY
e6oskA2[A:291-355] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptide chain release factor 1 ; ELECTRON MICROSCOPY
e6osqA3[A:291-355] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptide chain release factor 1 ; ELECTRON MICROSCOPY
e6og783[8:313-364] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptide chain release factor RF2 ; ELECTRON MICROSCOPY
e6ogf82[8:313-364] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptide chain release factor 2 ; ELECTRON MICROSCOPY
e6ogg84[8:313-364] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptide chain release factor 2 ; ELECTRON MICROSCOPY
e6szsz3[z:312-366] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptide chain release factor 2 ; ELECTRON MICROSCOPY
e7nqhBL3[BL:283-352] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptide chain release factor 1-like, mitochondrial ; ELECTRON MICROSCOPY
e7o1cB94[B9:315-362] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptide chain release factor RF2 ; ELECTRON MICROSCOPY
e7oj084[8:316-365] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptide chain release factor RF2 ; ELECTRON MICROSCOPY
e8aknW2[W:297-358] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Peptide chain release factor RF1 ; ELECTRON MICROSCOPY
e7m5dA1[A:297-360] Image Pymol Jmol Links: PDB, SCOP, CATH
Peptide chain release factor 1 ; ELECTRON MICROSCOPY
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