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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

X: Immunoglobulin-like beta-sandwich
H: Immunoglobulin-related
T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like
F: A2M,A2M_BRD

PF00207 PF07703

Representatives:

e4a5wA6[A:566-611,A:766-821] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

COMPLEMENT C5 ; X-RAY DIFFRACTION 3.50Å

e3pvmB6[B:544-648,B:735-811] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

COBRA VENOM FACTOR ; X-RAY DIFFRACTION 4.3Å

e2b39B3[B:558-597,B:748-811] Image Pymol Jmol Links: PDB, SCOP, CATH

e3prxD4[D:544-646,D:736-811] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

COBRA VENOM FACTOR ; X-RAY DIFFRACTION 4.3Å

e3pvmD4[D:544-648,D:735-811] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

COBRA VENOM FACTOR ; X-RAY DIFFRACTION 4.3Å

e3prxB16[B:544-646,B:736-811] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

COBRA VENOM FACTOR ; X-RAY DIFFRACTION 4.3Å

e2b39A1[A:558-597,A:748-811] Image Pymol Jmol Links: PDB, SCOP, CATH

e5i5kB5[B:566-679,B:758-821] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Complement C5 ; X-RAY DIFFRACTION 4.2Å

e5i5kA5[A:566-679,A:758-821] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Complement C5 ; X-RAY DIFFRACTION 4.2Å

e4acqA12[A:564-632,A:662-689,A:729-790] Image Pymol Jmol Links: PDB, SCOP, CATH

e4acqB12[B:564-632,B:662-689,B:729-790] Image Pymol Jmol Links: PDB, SCOP, CATH

e4acqD12[D:564-632,D:662-689,D:729-790] Image Pymol Jmol Links: PDB, SCOP, CATH

e3pvmA17[A:566-679,A:758-821] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

COMPLEMENT C5 ; X-RAY DIFFRACTION 4.3Å

e3pvmC23[C:566-679,C:758-821] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

COMPLEMENT C5 ; X-RAY DIFFRACTION 4.3Å

e4acqC6[C:564-632,C:662-689,C:729-790] Image Pymol Jmol Links: PDB, SCOP, CATH

e4d94A5[A:515-603,A:630-683] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Thioester-containing protein 1 ; ligands: NAG ; X-RAY DIFFRACTION 2.700Å

e4lnvA4[A:515-605,A:629-683] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Thioester-containing protein I ; ligands: NAG ; X-RAY DIFFRACTION 3.700Å

e4lnvC4[C:515-605,C:629-683] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Thioester-containing protein I ; ligands: NAG ; X-RAY DIFFRACTION 3.700Å

e2pn5A5[A:495-582,A:609-662] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Thioester-containing protein I ; ligands: NAG ; X-RAY DIFFRACTION 2.698Å

e4lnvB18[B:515-592,B:629-683] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Thioester-containing protein I ; X-RAY DIFFRACTION 3.700Å

e6i2xB1[B:544-645,B:738-811] Image Pymol Jmol Links: PDB, SCOP, CATH

e6tavA2[A:564-700,A:729-789] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Alpha-2-macroglobulin ; X-RAY DIFFRACTION 4.20Å

e6tavC2[C:564-691,C:728-789] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Alpha-2-macroglobulin ; X-RAY DIFFRACTION 4.20Å

e7nycA4[A:548-655,A:750-802] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Complement C5 ; ELECTRON MICROSCOPY

e7nydA4[A:548-655,A:750-802] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Complement C5 ; ELECTRON MICROSCOPY

e7q60A4[A:558-633,A:669-695,A:729-788] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Alpha-2-macroglobulin-like protein 1 ; ELECTRON MICROSCOPY

e7q61A4[A:558-633,A:669-694,A:726-788] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Alpha-2-macroglobulin-like protein 1 ; ligands: NAG ; ELECTRON MICROSCOPY

e7q62A7[A:558-633,A:669-695,A:729-788] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Alpha-2-macroglobulin-like protein 1 ; ligands: NAG ; ELECTRON MICROSCOPY

e7q1yA4[A:558-625,A:670-695,A:728-788] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Alpha-2-macroglobulin-like protein 1 ; X-RAY DIFFRACTION 4.276Å

e7q1yB6[B:558-625,B:670-695,B:728-788] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Alpha-2-macroglobulin-like protein 1 ; X-RAY DIFFRACTION 4.276Å

e7q5zA6[A:558-633,A:670-695,A:730-788] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Alpha-2-macroglobulin-like protein 1 ; ELECTRON MICROSCOPY

e7q62B1[B:558-633,B:669-695,B:726-788] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Alpha-2-macroglobulin-like protein 1 ; ligands: NAG ; ELECTRON MICROSCOPY

e6tavB4[B:564-632,B:662-689,B:729-790] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Alpha-2-macroglobulin ; X-RAY DIFFRACTION 4.20Å

e6tavD2[D:564-632,D:662-690,D:730-790] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Alpha-2-macroglobulin ; X-RAY DIFFRACTION 4.20Å

e7o7nA3[A:564-632,A:662-690,A:730-790] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Alpha-2-macroglobulin ; ELECTRON MICROSCOPY

e7o7nC7[C:564-632,C:662-690,C:730-790] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Alpha-2-macroglobulin ; ELECTRON MICROSCOPY

e7o7oA4[A:564-632,A:662-690,A:730-790] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Alpha-2-macroglobulin ; ligands: NAG ; ELECTRON MICROSCOPY

e7o7oC8[C:564-632,C:662-690,C:730-790] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Alpha-2-macroglobulin ; ligands: NAG ; ELECTRON MICROSCOPY

e7o7pA4[A:564-632,A:662-690,A:730-790] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Alpha-2-macroglobulin ; ELECTRON MICROSCOPY

e7o7pB4[B:564-632,B:662-690,B:730-790] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Alpha-2-macroglobulin ; ELECTRON MICROSCOPY

e7o7pC3[C:564-632,C:662-690,C:730-790] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Alpha-2-macroglobulin ; ELECTRON MICROSCOPY

e7o7pD2[D:564-632,D:662-690,D:730-790] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Alpha-2-macroglobulin ; ELECTRON MICROSCOPY

e7o7qA6[A:564-632,A:662-690,A:730-790] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Alpha-2-macroglobulin ; ELECTRON MICROSCOPY

e7o7qB5[B:564-632,B:662-690,B:730-790] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Alpha-2-macroglobulin ; ELECTRON MICROSCOPY

e7o7qC4[C:564-632,C:662-690,C:730-790] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Alpha-2-macroglobulin ; ELECTRON MICROSCOPY

e7o7qD5[D:564-632,D:662-690,D:730-790] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Alpha-2-macroglobulin ; ELECTRON MICROSCOPY

e7o7rA3[A:564-632,A:662-690,A:730-790] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Alpha-2-macroglobulin ; ELECTRON MICROSCOPY

e7o7rB7[B:564-632,B:662-690,B:730-790] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Alpha-2-macroglobulin ; ELECTRON MICROSCOPY

e7o7rC1[C:564-632,C:662-690,C:730-790] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Alpha-2-macroglobulin ; ELECTRON MICROSCOPY

e7o7rD2[D:564-632,D:662-690,D:730-790] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Alpha-2-macroglobulin ; ELECTRON MICROSCOPY

e7o7sA2[A:564-632,A:662-690,A:730-790] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Alpha-2-macroglobulin ; ELECTRON MICROSCOPY

e7o7sB3[B:564-632,B:662-690,B:730-790] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Alpha-2-macroglobulin ; ELECTRON MICROSCOPY

e7o7sC8[C:564-632,C:662-690,C:730-790] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Alpha-2-macroglobulin ; ELECTRON MICROSCOPY

e7o7lA8[A:564-632,A:662-689,A:729-790] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Alpha-2-macroglobulin ; ELECTRON MICROSCOPY

e7o7lB8[B:564-632,B:662-689,B:729-790] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Alpha-2-macroglobulin ; ELECTRON MICROSCOPY

e7o7lC4[C:564-632,C:662-689,C:729-790] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Alpha-2-macroglobulin ; ELECTRON MICROSCOPY

e7o7lD6[D:564-632,D:662-689,D:729-790] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Alpha-2-macroglobulin ; ELECTRON MICROSCOPY

e7o7mA1[A:564-632,A:662-689,A:729-790] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Alpha-2-macroglobulin ; ELECTRON MICROSCOPY

e7o7mB8[B:564-632,B:662-689,B:729-790] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Alpha-2-macroglobulin ; ELECTRON MICROSCOPY

e7o7mC8[C:564-632,C:662-689,C:729-790] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Alpha-2-macroglobulin ; ELECTRON MICROSCOPY

e7o7mD8[D:564-632,D:662-689,D:729-790] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Alpha-2-macroglobulin ; ELECTRON MICROSCOPY

e7o7nB8[B:564-632,B:662-689,B:729-790] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Alpha-2-macroglobulin ; ELECTRON MICROSCOPY

e7o7nD1[D:564-632,D:662-689,D:729-790] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Alpha-2-macroglobulin ; ELECTRON MICROSCOPY

e7o7oB5[B:564-632,B:662-689,B:729-790] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Alpha-2-macroglobulin ; ELECTRON MICROSCOPY

e7o7oD2[D:564-632,D:662-689,D:729-790] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Alpha-2-macroglobulin ; ELECTRON MICROSCOPY

e7o7sD3[D:564-632,D:662-689,D:729-790] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Alpha-2-macroglobulin ; ELECTRON MICROSCOPY

e8ayhB6[B:544-645,B:738-811] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Cobra venom factor ; ELECTRON MICROSCOPY

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.

X: Glycosyl hydrolase domain-like

some similarity with Ig fold

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

few secondary structure elementsstabilized by cofactors or disulfides

extended segmentsextended, non-globular segments, frequently bind to other proteins to form complexes