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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: EpoR_lig-bind

PF09067 CL0159

Representatives:

e1axiB1[B:32-130] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

GROWTH HORMONE RECEPTOR ; X-RAY DIFFRACTION 2.1Å

e7z0lC2[C:31-122] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Interleukin-27 receptor subunit alpha ; ELECTRON MICROSCOPY

e8g04C2[C:26-130] Image Pymol Jmol Links: PDB, SCOP, CATH

; ligands: NAG ; ELECTRON MICROSCOPY

e3hhrB1[B:32-130] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed,

HUMAN GROWTH HORMONE RECEPTOR (HGHBP) ; X-RAY DIFFRACTION 2.8Å

e2d9qB1[B:97-202] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Granulocyte colony-stimulating factor receptor ; X-RAY DIFFRACTION 2.8Å

e1kf9F1[F:1533-1628] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

EXTRACELLULAR DOMAIN HUMAN GROWTH HORMONE RECEPTOR (1-238) ; X-RAY DIFFRACTION 2.6Å

e3tgxA2[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Interleukin-21 receptor ; ligands: FUL,NI,SO4 ; X-RAY DIFFRACTION 2.8Å

e3tgxC1[C:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Interleukin-21 receptor ; ligands: FUL,SO4 ; X-RAY DIFFRACTION 2.8Å

e3hhrC1[C:32-130] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed,

HUMAN GROWTH HORMONE RECEPTOR (HGHBP) ; X-RAY DIFFRACTION 2.8Å

e1kf9E1[E:1233-1328] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

EXTRACELLULAR DOMAIN HUMAN GROWTH HORMONE RECEPTOR (1-238) ; X-RAY DIFFRACTION 2.6Å

e3tgxE1[E:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Interleukin-21 receptor ; ligands: FUL,NI,SO4 ; X-RAY DIFFRACTION 2.8Å

e3tgxG1[G:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Interleukin-21 receptor ; ligands: FUL,NI,SO4 ; X-RAY DIFFRACTION 2.8Å

e1a22B1[B:233-328] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

GROWTH HORMONE RECEPTOR ; X-RAY DIFFRACTION 2.60Å

e2aewB1[B:32-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Growth hormone receptor ; X-RAY DIFFRACTION 2.70Å

e3tgxI1[I:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Interleukin-21 receptor ; ligands: FUL,SO4 ; X-RAY DIFFRACTION 2.8Å

e3tgxK1[K:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Interleukin-21 receptor ; ligands: FUL,SO4 ; X-RAY DIFFRACTION 2.8Å

e1hwhB1[B:32-130] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

GROWTH HORMONE BINDING PROTEIN ; X-RAY DIFFRACTION 2.9Å

e1kf9B1[B:233-328] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

EXTRACELLULAR DOMAIN HUMAN GROWTH HORMONE RECEPTOR (1-238) ; X-RAY DIFFRACTION 2.6Å

e3tgxM1[M:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Interleukin-21 receptor ; ligands: NI,SO4 ; X-RAY DIFFRACTION 2.8Å

e1hwgB1[B:32-130] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

GROWTH HORMONE BINDING PROTEIN ; X-RAY DIFFRACTION 2.5Å

e3tgxO1[O:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Interleukin-21 receptor ; ligands: FUL,NI,SO4 ; X-RAY DIFFRACTION 2.8Å

e2aewA1[A:32-129] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Growth hormone receptor ; X-RAY DIFFRACTION 2.70Å

e4nzdA2[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH

Interleukin-21 receptor ; ligands: CL,TLA ; X-RAY DIFFRACTION 2.75Å

e4nzdC2[C:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH

Interleukin-21 receptor ; X-RAY DIFFRACTION 2.75Å

e1hwgC1[C:32-130] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

GROWTH HORMONE BINDING PROTEIN ; X-RAY DIFFRACTION 2.5Å

e4nzdB2[B:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH

Interleukin-21 receptor ; ligands: CL,TLA ; X-RAY DIFFRACTION 2.75Å

e2jixB1[B:10-116] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ERYTHROPOIETIN RECEPTOR ; X-RAY DIFFRACTION 3.20Å

e1eerC1[C:10-116] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ERYTHROPOIETIN RECEPTOR ; X-RAY DIFFRACTION 1.900Å

e6o4pA3[A:90-194] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Interleukin-11 receptor subunit alpha ; ligands: NAG,SO4 ; X-RAY DIFFRACTION

e6o4pB3[B:90-194] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Interleukin-11 receptor subunit alpha ; ligands: NAG,SO4 ; X-RAY DIFFRACTION

e1ebaA1[A:10-116] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEIN (ERYTHROPOIETIN RECEPTOR) ; X-RAY DIFFRACTION 2.7Å

e1eerB1[B:10-116] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ERYTHROPOIETIN RECEPTOR ; X-RAY DIFFRACTION 1.900Å

e7kq7B1[B:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Interleukin-21 receptor ; X-RAY DIFFRACTION 2.2Å

e7u7nC2[C:29-127] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Interleukin-27 subunit beta ; ELECTRON MICROSCOPY

e1ernB1[B:10-116] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEIN (ERYTHROPOIETIN RECEPTOR) ; X-RAY DIFFRACTION 2.4Å

e2jixC1[C:10-116] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ERYTHROPOIETIN RECEPTOR ; X-RAY DIFFRACTION 3.20Å

e7z0lB3[B:28-126] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Interleukin-27 subunit beta,Interleukin-27 subunit alpha ; ELECTRON MICROSCOPY

e7zxkB1[B:31-127] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Interleukin-27 subunit beta ; ligands: NAG ; X-RAY DIFFRACTION 2.20Å

e2jixE1[E:10-116] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ERYTHROPOIETIN RECEPTOR ; X-RAY DIFFRACTION 3.20Å

e1ebaB1[B:10-116] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEIN (ERYTHROPOIETIN RECEPTOR) ; X-RAY DIFFRACTION 2.7Å

e7zg0C2[C:26-126] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Interleukin-27 subunit beta ; ligands: NAG ; X-RAY DIFFRACTION 3.175Å

e1cn4A1[A:10-116] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEIN (ERYTHROPOIETIN RECEPTOR) ; X-RAY DIFFRACTION 2.800Å

e7zg0D2[D:26-126] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Interleukin-27 subunit beta ; ligands: NAG ; X-RAY DIFFRACTION 3.175Å

e1ebpB1[B:10-116] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed,

EPO RECEPTOR ; X-RAY DIFFRACTION 2.8Å

e7zxkD2[D:31-127] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Interleukin-27 subunit beta ; ligands: NAG ; X-RAY DIFFRACTION 2.20Å

e1ebpA1[A:10-116] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed,

EPO RECEPTOR ; X-RAY DIFFRACTION 2.8Å

e8d85A2[A:38-126] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Interleukin-27 receptor subunit alpha ; ligands: NAG ; ELECTRON MICROSCOPY

e8d7eC3[C:95-202] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Ciliary neurotrophic factor receptor subunit alpha ; ELECTRON MICROSCOPY

e1cn4B1[B:10-116] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEIN (ERYTHROPOIETIN RECEPTOR) ; X-RAY DIFFRACTION 2.800Å

e3d48R1[R:5-100] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Prolactin receptor ; ligands: CO3 ; X-RAY DIFFRACTION 2.50Å

e8d7hC2[C:95-202] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Ciliary neurotrophic factor receptor subunit alpha ; ELECTRON MICROSCOPY

e1bp3B1[B:205-300] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEIN (PROLACTIN RECEPTOR) ; X-RAY DIFFRACTION 2.900Å

e8d7hG3[G:95-202] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Ciliary neurotrophic factor receptor subunit alpha ; ELECTRON MICROSCOPY

e3ew3B1[B:0-100] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROLACTIN RECEPTOR ; X-RAY DIFFRACTION 3.8Å

e8d85C1[C:28-127] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Interleukin-27 subunit beta ; ligands: NAG ; ELECTRON MICROSCOPY

e8d74C1[C:107-202] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Ciliary neurotrophic factor receptor subunit alpha ; ligands: NAG ; ELECTRON MICROSCOPY

e3mzgB1[B:1-100] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROLACTIN RECEPTOR ; ligands: NA ; X-RAY DIFFRACTION 2.1Å

e8d7rC2[C:107-202] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Ciliary neurotrophic factor receptor subunit alpha ; ligands: NAG ; ELECTRON MICROSCOPY

e3ew3C1[C:4-100] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROLACTIN RECEPTOR ; X-RAY DIFFRACTION 3.8Å

e8entB1[B:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

; ligands: EDO,NAG ; X-RAY DIFFRACTION 2.83Å

e3npzB1[B:1-100] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROLACTIN RECEPTOR ; X-RAY DIFFRACTION 3.35Å

e3npzC1[C:1-100] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROLACTIN RECEPTOR ; X-RAY DIFFRACTION 3.35Å

e3n06B1[B:1-100] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Prolactin receptor ; ligands: NA ; X-RAY DIFFRACTION 2.000Å

e3n0pB1[B:1-100] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROLACTIN RECEPTOR ; ligands: NA ; X-RAY DIFFRACTION 2.1Å

e3ncbB1[B:1-100] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Prolactin receptor ; ligands: NA ; X-RAY DIFFRACTION 1.950Å

e3nccB1[B:1-100] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Prolactin receptor ; ligands: CO3,NA ; X-RAY DIFFRACTION 2.250Å

e3nceB1[B:1-100] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Prolactin receptor ; ligands: NA ; X-RAY DIFFRACTION 1.800Å

e3ncfB1[B:1-100] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Prolactin receptor ; ligands: NA ; X-RAY DIFFRACTION 2.500Å

e4i18C1[C:3-100] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Prolactin receptor ; ligands: GOL ; X-RAY DIFFRACTION 3.238Å

e1kf9C4[C:533-616] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

EXTRACELLULAR DOMAIN HUMAN GROWTH HORMONE RECEPTOR (1-238) ; X-RAY DIFFRACTION 2.6Å

e4i18R4[R:3-88] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Prolactin receptor ; ligands: ACT ; X-RAY DIFFRACTION 3.238Å

e1f6fC1[C:6-100] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROLACTIN RECEPTOR ; X-RAY DIFFRACTION 2.3Å

e4y5yF1[F:9-118] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Erythropoietin receptor ; X-RAY DIFFRACTION 2.850Å

e4y5vC2[C:9-116] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Erythropoietin receptor ; ligands: GOL ; X-RAY DIFFRACTION 2.60Å

e4y5vF2[F:9-116] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Erythropoietin receptor ; ligands: GOL ; X-RAY DIFFRACTION 2.60Å

e4y5vI1[I:10-110] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Erythropoietin receptor ; X-RAY DIFFRACTION 2.60Å

e6mojB1[B:6-116] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Erythropoietin receptor ; X-RAY DIFFRACTION 2.431Å

e6mohC2[C:7-116] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Erythropoietin receptor ; ligands: PO4 ; X-RAY DIFFRACTION 3.2Å

e6moeC1[C:7-116] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Erythropoietin receptor ; ligands: PO4 ; X-RAY DIFFRACTION 2.091Å

e6moeD2[D:8-116] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Erythropoietin receptor ; ligands: PO4 ; X-RAY DIFFRACTION 2.091Å

e6mofB2[B:8-116] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Erythropoietin receptor ; ligands: EDO ; X-RAY DIFFRACTION 2.894Å

e6mohD2[D:7-116] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Erythropoietin receptor ; X-RAY DIFFRACTION 3.2Å

e6molB2[B:8-116] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Erythropoietin receptor ; ligands: GOL ; X-RAY DIFFRACTION 3.163Å

e6moiB2[B:9-116] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Erythropoietin receptor ; ligands: EDO,PEG ; X-RAY DIFFRACTION 2.065Å

e6mokB1[B:9-116] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Erythropoietin receptor ; X-RAY DIFFRACTION 5.101Å

e6molC2[C:10-116] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Erythropoietin receptor ; X-RAY DIFFRACTION 3.163Å

e8d7hA1[A:133-231] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Cytokine receptor-like factor 1 ; ligands: NAG ; ELECTRON MICROSCOPY

e8d7hE3[E:133-230] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Cytokine receptor-like factor 1 ; ligands: NAG ; ELECTRON MICROSCOPY

e8g04B1[B:26-130] Image Pymol Jmol Links: PDB, SCOP, CATH

; ligands: NAG ; ELECTRON MICROSCOPY

e1f6fB1[B:5-100] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROLACTIN RECEPTOR ; X-RAY DIFFRACTION 2.3Å

e1ernA1[A:10-116] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEIN (ERYTHROPOIETIN RECEPTOR) ; X-RAY DIFFRACTION 2.4Å

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