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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: Cupredoxin-like
H: Surface antigen 1 (SAG1)-related-sequence (SRS) family
T: Surface antigen 1 (SAG1)-related-sequence (SRS) family
F: s48_45

PF07422

Representatives:

e2ymoA1[A:29-173] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PF12 ; X-RAY DIFFRACTION 1.9Å

e2ymoA2[A:174-305] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PF12 ; X-RAY DIFFRACTION 1.9Å

e6h5nD1[D:293-427] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Gametocyte surface protein P45/48 ; X-RAY DIFFRACTION 3.23Å

e7kj7B1[B:168-200,B:239-341] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Surface protein P12p ; X-RAY DIFFRACTION 2.790Å

e7kj7A1[A:168-198,A:242-341] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Surface protein P12p ; X-RAY DIFFRACTION 2.790Å

e7kjhC2[C:168-200,C:242-341] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Surface protein P12p ; ligands: FLC,NAG ; X-RAY DIFFRACTION 2.000Å

e7kjhD2[D:168-200,D:242-341] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Surface protein P12p ; ligands: FLC,NAG ; X-RAY DIFFRACTION 2.000Å

e7kjiB1[B:167-198,B:240-341] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Surface protein P12p ; X-RAY DIFFRACTION 3.250Å

e7s7qB1[B:174-304] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Merozoite surface protein P12 ; ligands: CD,NAG ; X-RAY DIFFRACTION 2.850Å

e7s7rA2[A:174-304] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Merozoite surface protein P12 ; ligands: NAG ; X-RAY DIFFRACTION 1.770Å

e4ys4A1[A:19-239] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Merozoite surface protein P41 ; ligands: CL,GOL,ZN ; X-RAY DIFFRACTION 2.45Å

e4ys4A2[A:240-369] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Merozoite surface protein P41 ; ligands: CL,GOL,ZN ; X-RAY DIFFRACTION 2.45Å

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