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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

X: ETN0001 domain-like
H: ETN0001 domain-like
T: Mss4-like
F: SelR

PF01641 CL0080

Representatives:

e1l1dA1[A:378-521] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed,

PEPTIDE METHIONINE SULFOXIDE REDUCTASE ; ligands: CAC ; X-RAY DIFFRACTION 1.85Å

e1l1dB1[B:378-521] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed,

PEPTIDE METHIONINE SULFOXIDE REDUCTASE ; ligands: CAC ; X-RAY DIFFRACTION 1.85Å

e3e0mA1[A:159-312] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Peptide methionine sulfoxide reductase msrA/msrB 1 ; X-RAY DIFFRACTION 2.3Å

e3hciA1[A:2-154] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Peptide methionine sulfoxide reductase ; ligands: CA,RSM,ZN ; X-RAY DIFFRACTION 2.59Å

e3hcgA1[A:378-522] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PEPTIDE METHIONINE SULFOXIDE REDUCTASE MSRA/MSRB ; ligands: PO4 ; X-RAY DIFFRACTION 1.82Å

e2kv1A1[A:1-124] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

METHIONINE-R-SULFOXIDE REDUCTASE B1 ; ligands: ZN ; SOLUTION NMR

e3maoA1[A:-1-112] Image Pymol Jmol Links: PDB, SCOP, CATH

Methionine-R-sulfoxide reductase B1 ; ligands: FE,MLI,NA ; X-RAY DIFFRACTION 1.42Å

e2kznA1[A:1-147] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PEPTIDE METHIONINE SULFOXIDE REDUCTASE MSRB ; SOLUTION NMR

e2l1uA1[A:1-143] Image Pymol Jmol Links: PDB, SCOP, CATH

METHIONINE-R-SULFOXIDE REDUCTASE B2, MITOCHONDRIAL ; ligands: ZN ; SOLUTION NMR

e3cezA1[A:10-139] Image Pymol Jmol Links: PDB, SCOP, CATH

METHIONINE-R-SULFOXIDE REDUCTASE ; ligands: ACY,ZN ; X-RAY DIFFRACTION 2.1Å

e3cezB1[B:10-139] Image Pymol Jmol Links: PDB, SCOP, CATH

METHIONINE-R-SULFOXIDE REDUCTASE ; ligands: ACY,ZN ; X-RAY DIFFRACTION 2.1Å

e3cxkA1[A:10-140] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methionine-R-sulfoxide reductase ; ligands: ACT,ZN ; X-RAY DIFFRACTION 1.70Å

e3cxkB1[B:10-140] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methionine-R-sulfoxide reductase ; ligands: ACT,ZN ; X-RAY DIFFRACTION 1.70Å

e2k8dA1[A:4-154] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Peptide methionine sulfoxide reductase msrB ; ligands: ZN ; SOLUTION NMR

e3e0mB2[B:159-312] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Peptide methionine sulfoxide reductase msrA/msrB 1 ; X-RAY DIFFRACTION 2.3Å

e3e0mC2[C:159-312] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Peptide methionine sulfoxide reductase msrA/msrB 1 ; X-RAY DIFFRACTION 2.3Å

e3e0mD2[D:159-312] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Peptide methionine sulfoxide reductase msrA/msrB 1 ; X-RAY DIFFRACTION 2.3Å

e3e0oA1[A:0-141] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Peptide methionine sulfoxide reductase msrB ; X-RAY DIFFRACTION 2.6Å

e3e0oB1[B:0-141] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Peptide methionine sulfoxide reductase msrB ; X-RAY DIFFRACTION 2.6Å

e3e0oC1[C:3-141] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Peptide methionine sulfoxide reductase msrB ; X-RAY DIFFRACTION 2.6Å

e3e0oD1[D:3-141] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Peptide methionine sulfoxide reductase msrB ; X-RAY DIFFRACTION 2.6Å

e3e0oE1[E:1-141] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Peptide methionine sulfoxide reductase msrB ; X-RAY DIFFRACTION 2.6Å

e3e0oF1[F:1-141] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Peptide methionine sulfoxide reductase msrB ; X-RAY DIFFRACTION 2.6Å

e3hcgB1[B:378-521] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PEPTIDE METHIONINE SULFOXIDE REDUCTASE MSRA/MSRB ; ligands: PO4 ; X-RAY DIFFRACTION 1.82Å

e3hcgC1[C:378-521] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PEPTIDE METHIONINE SULFOXIDE REDUCTASE MSRA/MSRB ; ligands: PO4 ; X-RAY DIFFRACTION 1.82Å

e3hcgD1[D:378-521] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PEPTIDE METHIONINE SULFOXIDE REDUCTASE MSRA/MSRB ; ligands: PO4 ; X-RAY DIFFRACTION 1.82Å

e3hchA1[A:378-522] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Peptide methionine sulfoxide reductase msrA/msrB ; ligands: CIT,P6G,RSM ; X-RAY DIFFRACTION 2.10Å

e3hchB1[B:378-522] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Peptide methionine sulfoxide reductase msrA/msrB ; ligands: P6G,RSM,TRS ; X-RAY DIFFRACTION 2.10Å

e3hciB1[B:2-154] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Peptide methionine sulfoxide reductase ; ligands: CA,ZN ; X-RAY DIFFRACTION 2.59Å

e3hcjA1[A:2-154] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PEPTIDE METHIONINE SULFOXIDE REDUCTASE ; ligands: ZN ; X-RAY DIFFRACTION 1.66Å

e3hcjB1[B:2-154] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PEPTIDE METHIONINE SULFOXIDE REDUCTASE ; ligands: ZN ; X-RAY DIFFRACTION 1.66Å

e5fa9A2[A:160-316] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Peptide methionine sulfoxide reductase MsrA ; ligands: DTT ; X-RAY DIFFRACTION 2.3Å

e5fa9B1[B:160-317] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Peptide methionine sulfoxide reductase MsrA ; ligands: DTT ; X-RAY DIFFRACTION 2.3Å

e6q9vA1[A:-3-138] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methionine-R-sulfoxide reductase B3 ; ligands: MPD,SO4,ZN ; X-RAY DIFFRACTION 1.850Å

e6q9vB1[B:0-156] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methionine-R-sulfoxide reductase B3 ; ligands: MPD,SO4,ZN ; X-RAY DIFFRACTION 1.850Å

e6qa0A1[A:-3-137] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methionine-R-sulfoxide reductase B3 ; ligands: CL,SO4,ZN ; X-RAY DIFFRACTION 1.710Å

e6qa0B1[B:-3-137] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methionine-R-sulfoxide reductase B3 ; ligands: CL,SO4,ZN ; X-RAY DIFFRACTION 1.710Å

e6tr8A1[A:1-136] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Peptide-methionine (R)-S-oxide reductase ; ligands: ZN ; SOLUTION NMR

e7ctoB1[B:3-141] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Peptide methionine sulfoxide reductase MsrB ; X-RAY DIFFRACTION 3.47Å

e7ctoC1[C:4-139] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Peptide methionine sulfoxide reductase MsrB ; X-RAY DIFFRACTION 3.47Å

e7ctoD1[D:4-141] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Peptide methionine sulfoxide reductase MsrB ; X-RAY DIFFRACTION 3.47Å

e7ctoE1[E:6-141] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Peptide methionine sulfoxide reductase MsrB ; X-RAY DIFFRACTION 3.47Å

e7ctoF1[F:5-139] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Peptide methionine sulfoxide reductase MsrB ; X-RAY DIFFRACTION 3.47Å

e7ctoA1[A:6-139] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Peptide methionine sulfoxide reductase MsrB ; X-RAY DIFFRACTION 3.47Å

e6symA1[A:3-137] Image Pymol Jmol Links: PDB, SCOP, CATH

Peptide methionine sulfoxide reductase MsrB ; ligands: ZN ; X-RAY DIFFRACTION 1.630Å

e6symB1[B:4-137] Image Pymol Jmol Links: PDB, SCOP, CATH

Peptide methionine sulfoxide reductase MsrB ; ligands: ZN ; X-RAY DIFFRACTION 1.630Å

e7e43B1[B:193-357] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Peptide methionine sulfoxide reductase MsrA/MsrB ; ligands: ACT ; X-RAY DIFFRACTION 2.200Å

e7e43A1[A:193-357] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Peptide methionine sulfoxide reductase MsrA/MsrB ; ligands: ACT ; X-RAY DIFFRACTION 2.200Å

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.

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