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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

X: cradle loop barrel

Refs: Structure 14, 1489-1498; Current opinion in structural biology 18, 358-365

X: SH3
H: SH3
T: SH3
F: Agenet

PF05641 CL0010

Representatives:

e4qvzB2[B:55-122] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fragile X mental retardation protein 1 ; X-RAY DIFFRACTION 3.195Å

e7yt9A3[A:146-222] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

AGD1-4 of Arabidopsis AGDP3 ; X-RAY DIFFRACTION 2.600Å

e7yt9B3[B:146-222] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

AGD1-4 of Arabidopsis AGDP3 ; X-RAY DIFFRACTION 2.600Å

e7ytaA2[A:10-82] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

AGDP3 AGD1-2 ; X-RAY DIFFRACTION 2.300Å

e7ytaB1[B:11-82] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

AGDP3 AGD1-2 ; X-RAY DIFFRACTION 2.300Å

e7ytaC1[C:10-82] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

AGDP3 AGD1-2 ; X-RAY DIFFRACTION 2.300Å

e7ytaA1[A:83-147] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

AGDP3 AGD1-2 ; X-RAY DIFFRACTION 2.300Å

e7yt9A1[A:78-145] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

AGD1-4 of Arabidopsis AGDP3 ; X-RAY DIFFRACTION 2.600Å

e7yt9B1[B:78-145] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

AGD1-4 of Arabidopsis AGDP3 ; X-RAY DIFFRACTION 2.600Å

e7ytaB2[B:83-150] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

AGDP3 AGD1-2 ; X-RAY DIFFRACTION 2.300Å

e7ytaC2[C:83-149] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

AGDP3 AGD1-2 ; X-RAY DIFFRACTION 2.300Å

e7yt9A2[A:4-77] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

AGD1-4 of Arabidopsis AGDP3 ; X-RAY DIFFRACTION 2.600Å

e7yt9B2[B:4-77] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

AGD1-4 of Arabidopsis AGDP3 ; X-RAY DIFFRACTION 2.600Å

e3kufA1[A:57-120] Image Pymol Jmol Links: PDB, SCOP, CATH

FRAGILE X MENTAL RETARDATION SYNDROME-RELATED PROTEIN 1 ; ligands: DTT,GOL ; X-RAY DIFFRACTION 2.7Å

e3h8zA1[A:69-132] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fragile X mental retardation syndrome-related protein 2 ; X-RAY DIFFRACTION 1.920Å

e3o8vA2[A:59-121] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fragile X mental retardation syndrome-related protein 1 ; X-RAY DIFFRACTION 2.500Å

e4qvzA1[A:55-122] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fragile X mental retardation protein 1 ; X-RAY DIFFRACTION 3.195Å

e4qw2A3[A:55-122] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fragile X mental retardation protein 1 ; X-RAY DIFFRACTION 2.989Å

e4qw2B2[B:55-122] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fragile X mental retardation protein 1 ; ligands: PB ; X-RAY DIFFRACTION 2.989Å

e4ovaA3[A:55-122] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

; X-RAY DIFFRACTION 3Å

e4ovaB2[B:55-122] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

; X-RAY DIFFRACTION 3Å

e4ovaC2[C:55-122] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

; ligands: TRS ; X-RAY DIFFRACTION 3Å

e4ovaD3[D:55-122] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

; ligands: TRS ; X-RAY DIFFRACTION 3Å

e2bkdN1[N:55-134] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fragile X messenger ribonucleoprotein 1 ; SOLUTION NMR

e5zwxA1[A:26-104] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

DUF724 domain-containing protein 6-like ; X-RAY DIFFRACTION 1.9Å

e5zwxB2[B:26-104] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

DUF724 domain-containing protein 6-like ; X-RAY DIFFRACTION 1.9Å

e6ie4A2[A:5-81] Image Pymol Jmol Links: PDB, SCOP, CATH

Agenet domain-containing protein ; X-RAY DIFFRACTION 2.696Å

e6ie4C1[C:6-81] Image Pymol Jmol Links: PDB, SCOP, CATH

Agenet domain-containing protein ; X-RAY DIFFRACTION 2.696Å

e6ie7A2[A:6-81] Image Pymol Jmol Links: PDB, SCOP, CATH

Agenet domain-containing protein ; ligands: NH4 ; X-RAY DIFFRACTION 2.700Å

e6ie7B2[B:5-81] Image Pymol Jmol Links: PDB, SCOP, CATH

Agenet domain-containing protein ; ligands: NH4 ; X-RAY DIFFRACTION 2.700Å

e6ie7C2[C:6-81] Image Pymol Jmol Links: PDB, SCOP, CATH

Agenet domain-containing protein ; ligands: NH4 ; X-RAY DIFFRACTION 2.700Å

e6ie7D2[D:6-81] Image Pymol Jmol Links: PDB, SCOP, CATH

Agenet domain-containing protein ; ligands: NH4 ; X-RAY DIFFRACTION 2.700Å

e5zwzA1[A:206-286] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Agenet domain-containing protein ; X-RAY DIFFRACTION 2.00Å

e6ie6A1[A:8-91] Image Pymol Jmol Links: PDB, SCOP, CATH

Agenet domain-containing protein ; X-RAY DIFFRACTION 1.700Å

e6ie5A1[A:-13-68] Image Pymol Jmol Links: PDB, SCOP, CATH

Agenet domain-containing protein ; X-RAY DIFFRACTION 2.300Å

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.

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

few secondary structure elementsstabilized by cofactors or disulfides

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