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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

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

X: LuxS, MPP, ThrRS/AlaRS common domain

looks like an elaborated ferredoxin

X: ClpS-like

contains a HTH motif

X: beta-Grasp
H: Immunoglobulin-binding domains
T: Immunoglobulin-binding domains
F: B1

PF02246 CL0072

Representatives:

e1hz6A1[A:-2-64] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEIN L ; X-RAY DIFFRACTION 1.7Å

e1hz6C1[C:2-64] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEIN L ; X-RAY DIFFRACTION 1.7Å

e1hz5A1[A:-2-64] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEIN L ; ligands: ZN ; X-RAY DIFFRACTION 1.8Å

e1k53B1[B:-2-64] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protein L ; ligands: ZN ; X-RAY DIFFRACTION 2.1Å

e1k50A1[A:2-64] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protein L ; X-RAY DIFFRACTION 1.8Å

e1kh0A1[A:2-66] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

protein L ; X-RAY DIFFRACTION 1.9Å

e1mhhE1[E:820-881] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

protein L domain C ; X-RAY DIFFRACTION 2.1Å

e1k53A1[A:-2-64] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protein L ; ligands: ZN ; X-RAY DIFFRACTION 2.1Å

e1yntE1[E:820-880] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

protein L ; X-RAY DIFFRACTION 3.10Å

e1jmlA1[A:-2-64] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protein L ; ligands: ZN ; X-RAY DIFFRACTION 1.9Å

e1k52B1[B:-2-64] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protein L ; ligands: ZN ; X-RAY DIFFRACTION 1.8Å

e1mhhF1[F:1820-1881] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

protein L domain C ; X-RAY DIFFRACTION 2.1Å

e1k52A1[A:-2-64] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protein L ; ligands: ZN ; X-RAY DIFFRACTION 1.8Å

e2ptlA1[A:12-78] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEIN L ; SOLUTION NMR

e1k50D1[D:2-64] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protein L ; X-RAY DIFFRACTION 1.8Å

e1k50B1[B:2-64] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protein L ; X-RAY DIFFRACTION 1.8Å

e1kh0B1[B:2-66] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

protein L ; X-RAY DIFFRACTION 1.9Å

e1k50C1[C:2-64] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protein L ; X-RAY DIFFRACTION 1.8Å

e1hz6B1[B:2-64] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEIN L ; X-RAY DIFFRACTION 1.7Å

e1hz5B1[B:-2-64] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEIN L ; ligands: ZN ; X-RAY DIFFRACTION 1.8Å

e1k51A1[A:-2-64] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protein L ; ligands: ZN ; X-RAY DIFFRACTION 1.8Å

e1hezE1[E:820-880] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEIN L ; X-RAY DIFFRACTION 2.700Å

e2kacA1[A:1-64] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protein L ; SOLUTION NMR

e1xcqL1[L:17-82] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEIN L ; X-RAY DIFFRACTION 3.5Å

e2jzpA1[A:1-64] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protein L ; SOLUTION NMR

e1ymhE1[E:818-882] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEIN L ; X-RAY DIFFRACTION 2.6Å

e1ymhF1[F:818-882] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEIN L ; X-RAY DIFFRACTION 2.6Å

e1xcqM1[M:20-81] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEIN L ; X-RAY DIFFRACTION 3.5Å

e1xcqN1[N:18-81] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEIN L ; X-RAY DIFFRACTION 3.5Å

e1xcqO1[O:20-81] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEIN L ; X-RAY DIFFRACTION 3.5Å

e1xctL1[L:13-82] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEIN L ; X-RAY DIFFRACTION 3.05Å

e1xctM1[M:12-82] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEIN L ; X-RAY DIFFRACTION 3.05Å

e1xf5L1[L:12-82] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEIN L ; X-RAY DIFFRACTION 2.6Å

e1xf5M1[M:16-82] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEIN L ; X-RAY DIFFRACTION 2.6Å

e4hjgE1[E:20-81] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEIN L FRAGMENT ; X-RAY DIFFRACTION 2.0Å

e4hkzE1[E:19-81] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protein L fragment ; X-RAY DIFFRACTION 2.08Å

e4ioiE1[E:19-81] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEIN L ; X-RAY DIFFRACTION 1.95Å

e5u3dE1[E:19-81] Image Pymol Jmol Links: PDB, SCOP, CATH

Protein L ; X-RAY DIFFRACTION 1.770Å

e5u5fE1[E:19-81] Image Pymol Jmol Links: PDB, SCOP, CATH

Protein L ; X-RAY DIFFRACTION 1.810Å

e5u5mE1[E:19-81] Image Pymol Jmol Links: PDB, SCOP, CATH

Protein L ; X-RAY DIFFRACTION 1.880Å

e5u6aE1[E:19-81] Image Pymol Jmol Links: PDB, SCOP, CATH

Protein L ; X-RAY DIFFRACTION 1.736Å

e6b9yE1[E:19-81] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protein L ; X-RAY DIFFRACTION 2.14Å

e6b9zE1[E:19-81] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protein L ; X-RAY DIFFRACTION 1.820Å

e6baeE1[E:19-81] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protein L ; X-RAY DIFFRACTION 2.14Å

e6bahE1[E:19-81] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protein L ; X-RAY DIFFRACTION 1.90Å

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