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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: V-set

PF07686 CL0159

Representatives:

e1mjuH1[H:1-113] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

IMMUNOGLOBULIN MS6-12 ; ligands: GOL ; X-RAY DIFFRACTION 1.22Å

e1mjuL1[L:1-107] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

IMMUNOGLOBULIN MS6-12 ; ligands: GOL ; X-RAY DIFFRACTION 1.22Å

e1eajA1[A:16-139] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

COXSACKIE VIRUS AND ADENOVIRUS RECEPTOR ; ligands: SO4 ; X-RAY DIFFRACTION 1.350Å

e2p49B1[B:1-121] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ANTIBODY CAB-RN05 ; X-RAY DIFFRACTION 1.38Å

e1ogaD1[D:3-117] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

T-CELL RECEPTOR ALPHA CHAIN V REGION ; X-RAY DIFFRACTION 1.4Å

e1ogaE1[E:5-118] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

T-CELL RECEPTOR BETA CHAIN C REGION ; X-RAY DIFFRACTION 1.4Å

e1pkoA1[A:1-126] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

MYELIN OLIGODENDROCYTE GLYCOPROTEIN ; X-RAY DIFFRACTION 1.45Å

e1sq2N1[N:2-113] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

NOVEL ANTIGEN RECEPTOR ; ligands: EDO ; X-RAY DIFFRACTION 1.45Å

e1smoA1[A:21-133] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TRIGGERING RECEPTOR EXPRESSED ON MYELOID CELLS 1 ; ligands: TLA ; X-RAY DIFFRACTION 1.47Å

e1oaqL1[L:1-110] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

LIGHT CHAIN ; X-RAY DIFFRACTION 1.5Å

e2g5rA1[A:24-144] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

SIALIC ACID-BINDING IG-LIKE LECTIN 7 ; ligands: CYS,NAG,NXD ; X-RAY DIFFRACTION 1.6Å

e2bnqD1[D:2-114] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

T-CELL RECEPTOR ALPHA CHAIN V REGION ; X-RAY DIFFRACTION 1.700Å

e3bp5A1[A:1-114] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Programmed cell death protein 1 ; ligands: GOL ; X-RAY DIFFRACTION 1.700Å

e1qfoA1[A:1-118] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEIN (SIALOADHESIN) ; ligands: SIA ; X-RAY DIFFRACTION 1.85Å

e1neuA1[A:1-119] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

MYELIN P0 PROTEIN ; X-RAY DIFFRACTION 1.9Å

e1tvdA1[A:1-116] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

T CELL RECEPTOR ; X-RAY DIFFRACTION 1.9Å

e1xedA1[A:2-117] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

POLYMERIC-IMMUNOGLOBULIN RECEPTOR ; ligands: MG ; X-RAY DIFFRACTION 1.9Å

e1a6wH2[H:301-420] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH

B1-8 FV (HEAVY CHAIN) ; ligands: NIP ; X-RAY DIFFRACTION 2.0Å

e1dqtA1[A:1-117] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CYTOTOXIC T LYMPHOCYTE ASSOCIATED ANTIGEN 4 ; ligands: CL,EDO ; X-RAY DIFFRACTION 2.0Å

e1lp9E1[E:0-117] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

T-cell Receptor alpha chain ; X-RAY DIFFRACTION 2.0Å

e1tjgH1[H:1-113] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

FAB 2F5 HEAVY CHAIN ; ligands: IPA ; X-RAY DIFFRACTION 2.0Å

e1nezG1[G:4-125] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

T-CELL SURFACE GLYCOPROTEIN CD8 ALPHA CHAIN ; ligands: NAG ; X-RAY DIFFRACTION 2.1Å

e1hkfA1[A:5-112] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

NK CELL ACTIVATING RECEPTOR ; X-RAY DIFFRACTION 2.2Å

e2ij0C1[C:1-117] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PENULTIMATE AFFINITY-MATURED VARIANT OF HVBETA 2.1, D10 ; X-RAY DIFFRACTION 2.25Å

e2atpB1[B:1-115] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

T-CELL SURFACE GLYCOPROTEIN CD8 BETA CHAIN ; X-RAY DIFFRACTION 2.4Å

e2ntsP1[P:3-118] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TRBC1 PROTEIN ; X-RAY DIFFRACTION 2.4Å

e1bd2D1[D:1-117] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

T CELL RECEPTOR ALPHA ; X-RAY DIFFRACTION 2.5Å

e1f97A1[A:27-128] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

JUNCTION ADHESION MOLECULE ; X-RAY DIFFRACTION 2.5Å

e1hnfA1[A:4-104] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CD2 ; ligands: NA,NAG ; X-RAY DIFFRACTION 2.5Å

e2ak4D1[D:1-116] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

SB27 T CELL RECEPTOR ALPHA CHAIN ; X-RAY DIFFRACTION 2.5Å

e1fo0B1[B:1-116] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEIN (BM3.3 T CELL RECEPTOR BETA-CHAIN) ; X-RAY DIFFRACTION 2.500Å

e1ncnA1[A:0-109] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

T LYMPHOCYTE ACTIVATION ANTIGEN CD86 ; X-RAY DIFFRACTION 2.7Å

e1hzhH5[H:1-113] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

IMMUNOGLOBULIN HEAVY CHAIN ; X-RAY DIFFRACTION 2.70Å

e1dr9A1[A:1-105] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

T LYMPHOCYTE ACTIVATION ANTIGEN ; X-RAY DIFFRACTION 3.0Å

e1hxmA1[A:1-120] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

GAMMA-DELTA T-CELL RECEPTOR ; X-RAY DIFFRACTION 3.00Å

e1hxmB1[B:1-123] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

GAMMA-DELTA T-CELL RECEPTOR ; X-RAY DIFFRACTION 3.00Å

e1l6zA1[A:1-107] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BILIARY GLYCOPROTEIN C ; ligands: NAG,NDG ; X-RAY DIFFRACTION 3.32Å

e1ypzF1[F:1-120] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

T-CELL RECEPTOR GAMMA CHAIN ; X-RAY DIFFRACTION 3.4Å

e1e07A1[A:1-107] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CARCINOEMBRYONIC ANTIGEN ; SOLUTION SCATTERING

e1kgcD1[D:2-117] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

T-cell receptor alpha chain ; X-RAY DIFFRACTION

e1zvoC1[C:1-129] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Immunoglobulin delta heavy chain ; SOLUTION SCATTERING

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