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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: C2 domain
T: C2 domain
F: C2

PF00168 CL0154

Representatives:

e1uowA1[A:263-419] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

SYNAPTOTAGMIN I ; ligands: ACT,CA,GOL ; X-RAY DIFFRACTION 1.04Å

e2cm5A1[A:541-677] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RABPHILIN-3A ; ligands: CA ; X-RAY DIFFRACTION 1.28Å

e2bwqA1[A:729-853] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

REGULATING SYNAPTIC MEMBRANE EXOCYTOSIS PROTEIN 2 ; ligands: SO4 ; X-RAY DIFFRACTION 1.410Å

e2cjtA1[A:1-128] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

UNC-13 HOMOLOG A ; ligands: EDO,FMT ; X-RAY DIFFRACTION 1.440Å

e2zkmX3[X:678-799] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

1-phosphatidylinositol-4,5-bisphosphate phosphodiesterase beta-2 ; X-RAY DIFFRACTION 1.620Å

e1gmiA1[A:1-136] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEIN KINASE C, EPSILON TYPE ; ligands: MG ; X-RAY DIFFRACTION 1.7Å

e2nq3A1[A:13-145] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH

ITCHY HOMOLOG E3 UBIQUITIN PROTEIN LIGASE ; ligands: CL ; X-RAY DIFFRACTION 1.8Å

e1rlwA1[A:16-141] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PHOSPHOLIPASE A2 ; ligands: CA,CD ; X-RAY DIFFRACTION 2.3Å

e1qasA1[A:626-756] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PHOSPHOLIPASE C DELTA-1 ; X-RAY DIFFRACTION 2.4Å

e4p42A2[A:353-494] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

EXTENDED SYNAPTOTAGMIN-2 ; X-RAY DIFFRACTION 2.44Å

e4p42A3[A:504-630] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

EXTENDED SYNAPTOTAGMIN-2 ; X-RAY DIFFRACTION 2.44Å

e1a25A1[A:157-288] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEIN KINASE C (BETA) ; ligands: CA ; X-RAY DIFFRACTION 2.7Å

e1dsyA1[A:157-288] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEIN KINASE C, ALPHA TYPE ; ligands: CA,PO4,PSF ; X-RAY DIFFRACTION 2.6Å

e1a25B1[B:157-288] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEIN KINASE C (BETA) ; ligands: CA,PSE ; X-RAY DIFFRACTION 2.7Å

e3gpeA1[A:156-292] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protein kinase C alpha type ; ligands: CA,PO4,PT5 ; X-RAY DIFFRACTION 1.9Å

e3rdjA1[A:156-292] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protein kinase C alpha type ; X-RAY DIFFRACTION 1.9Å

e2uzpA1[A:-1-293] Image Pymol Jmol Links: PDB, SCOP, CATH

PROTEIN KINASE C GAMMA TYPE ; ligands: CA,CO,EDO,PLP,SO4 ; X-RAY DIFFRACTION 2.000Å

e2uzpB1[B:-1-293] Image Pymol Jmol Links: PDB, SCOP, CATH

PROTEIN KINASE C GAMMA TYPE ; ligands: CA,CO,EDO,PLP,SO4 ; X-RAY DIFFRACTION 2.000Å

e2uzpC1[C:-1-293] Image Pymol Jmol Links: PDB, SCOP, CATH

PROTEIN KINASE C GAMMA TYPE ; ligands: CA,CO,EDO,PLP,SO4 ; X-RAY DIFFRACTION 2.000Å

e3twyA1[A:156-292] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protein kinase C alpha type ; ligands: PB,SO4 ; X-RAY DIFFRACTION 1.500Å

e4dnlA1[A:156-293] Image Pymol Jmol Links: PDB, SCOP, CATH

Protein kinase C alpha type ; ligands: NA ; X-RAY DIFFRACTION 1.90Å

e2q3xA1[A:1445-1594] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

REGULATING SYNAPTIC MEMBRANE EXOCYTOSIS PROTEIN 1 ; ligands: CL,SO4 ; X-RAY DIFFRACTION 1.73Å

e3fbkA1[A:32-171] Image Pymol Jmol Links: PDB, SCOP, CATH

REGULATOR OF G-PROTEIN SIGNALING 3 ; ligands: SO4 ; X-RAY DIFFRACTION 2.0Å

e2q3xB1[B:1445-1594] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

REGULATING SYNAPTIC MEMBRANE EXOCYTOSIS PROTEIN 1 ; ligands: CL,NA,SO4 ; X-RAY DIFFRACTION 1.73Å

e3fbkB1[B:31-171] Image Pymol Jmol Links: PDB, SCOP, CATH

REGULATOR OF G-PROTEIN SIGNALING 3 ; ligands: SO4 ; X-RAY DIFFRACTION 2.0Å

e4l1lA1[A:156-293] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protein kinase C alpha type ; ligands: CD,SO4 ; X-RAY DIFFRACTION 1.60Å

e2nceA1[A:155-293] Image Pymol Jmol Links: PDB, SCOP, CATH

Protein kinase C alpha type ; ligands: CA ; SOLUTION NMR

e2fk9A1[A:-9-137] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEIN KINASE C, ETA TYPE ; X-RAY DIFFRACTION 1.75Å

e3nsjA3[A:411-551] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PERFORIN-1 ; ligands: CA,CL,GOL,IOD ; X-RAY DIFFRACTION 2.75Å

e1rh8A1[A:4635-4776] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Piccolo protein ; SOLUTION NMR

e1rsyA1[A:9F-265] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

SYNAPTOTAGMIN I ; ligands: SO4 ; X-RAY DIFFRACTION

e1ugkA1[A:1-138] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH

Synaptotagmin IV ; SOLUTION NMR

e1wfjA1[A:1-136] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH

putative elicitor-responsive gene ; SOLUTION NMR

e1wfmA1[A:1-138] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH

synaptotagmin XIII ; SOLUTION NMR

e2ep6A1[A:92-217] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH

MCTP2 protein ; SOLUTION NMR

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