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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

X: EF-hand
H: EF-hand-related
T: EF-hand
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.

Representatives:

e1qv0A2[A:7-107] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Obelin ; ligands: CZH,GOL ; X-RAY DIFFRACTION 1.1Å

e2zfdA2[A:32-118] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Calcineurin B-like protein 2 ; ligands: CA ; X-RAY DIFFRACTION 1.2Å

e3kevA1[A:4-91] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Galieria sulfuraria DCUN1 domain-containing protein ; ligands: ACT,SO4 ; X-RAY DIFFRACTION 1.300Å

e4wriA2[A:4-97] * nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Okadaic acid binding protein 2-alpha ; ligands: OKA ; X-RAY DIFFRACTION 1.400Å

e1omrA1[A:2-96] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RECOVERIN ; X-RAY DIFFRACTION 1.5Å

e1m45A1[A:4-81] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Myosin light chain ; X-RAY DIFFRACTION 1.640Å

e1k94A1[A:123-217] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

GRANCALCIN ; ligands: CA ; X-RAY DIFFRACTION 1.7Å

e2hpsA4[A:3-100] * nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

COELENTERAZINE-BINDING PROTEIN WITH BOUND COELENTERAZINE ; ligands: CTZ,GOL ; X-RAY DIFFRACTION 1.72Å

e4x3nA1[A:24-177] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Calcium-regulated actin-bundling protein ; ligands: CA,CIT ; X-RAY DIFFRACTION 1.89Å

e1alvA1[A:171-266] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CALPAIN ; ligands: CA ; X-RAY DIFFRACTION 1.9Å

e1alvA2[A:94-170] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CALPAIN ; ligands: CA ; X-RAY DIFFRACTION 1.9Å

e1xo5A2[A:12-102] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Calcium and integrin-binding protein 1 ; ligands: CA ; X-RAY DIFFRACTION 1.99Å

e1s6cA2[A:39-121] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

KV4 POTASSIUM CHANNEL-INTERACTING PROTEIN KCHIP1B ; X-RAY DIFFRACTION 2.0Å

e1w7jB1[B:11-83] * nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

MYOSIN LIGHT CHAIN 1 ; X-RAY DIFFRACTION 2.0Å

e1wdcB2[B:84-153] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

SCALLOP MYOSIN ; X-RAY DIFFRACTION 2.02Å

e3siaA2[A:118-220] * nonrep Image Pymol Jmol Links: PDB, SCOP, CATH

URE3-BP sequence specific DNA binding protein ; ligands: CL,IOD ; X-RAY DIFFRACTION 2.050Å

e8fjgA1[A:1-104] * nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

; X-RAY DIFFRACTION 2.13Å

e4dckA1[A:1776-1897] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Sodium channel protein type 5 subunit alpha ; X-RAY DIFFRACTION 2.2Å

e1hqvA1[A:8-93] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROGRAMMED CELL DEATH PROTEIN 6 ; ligands: CA ; X-RAY DIFFRACTION 2.3Å

e4p5wA3[A:160-229] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Calcium-binding mitochondrial carrier protein Aralar2,Calcium-binding mitochondrial carrier protein Aralar2 ; X-RAY DIFFRACTION 2.40Å

e4p5wA4[A:230-295] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Calcium-binding mitochondrial carrier protein Aralar2,Calcium-binding mitochondrial carrier protein Aralar2 ; X-RAY DIFFRACTION 2.40Å

e5cuvA1[A:33-153] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH

Acidocalcisomal pyrophosphatase ; X-RAY DIFFRACTION 2.620Å

e2mysB2[B:92-163] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed,

MYOSIN ; X-RAY DIFFRACTION 2.8Å

e1j7qA1[A:1-86] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Calcium Vector Protein ; SOLUTION NMR

e1jbaA1[A:2-92] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEIN (GUANYLATE CYCLASE ACTIVATING PROTEIN 2) ; ligands: CA ; SOLUTION NMR

e1nyaA1[A:1-91] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Calerythrin ; ligands: CA ; SOLUTION NMR

e1snlA1[A:1-99] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Nucleobindin 1 ; SOLUTION NMR

e2l4iA1[A:8-102] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CALCIUM AND INTEGRIN-BINDING PROTEIN 1 ; SOLUTION NMR

e2sasA2[A:94-185] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

SARCOPLASMIC CALCIUM-BINDING PROTEIN ; ligands: CA ; X-RAY DIFFRACTION

e2scpA1[A:1-86] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

SARCOPLASMIC CALCIUM-BINDING PROTEIN ; ligands: CA ; X-RAY DIFFRACTION

e5kgqA1[A:1-112] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH

Uncharacterized protein ; SOLUTION NMR

e6mi5X1[X:104-139] * nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Lanmodulin ; SOLUTION NMR

e6nq1A1[A:327-347,A:371-411] * nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Two pore calcium channel protein 2 ; ELECTRON MICROSCOPY

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

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