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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: Alpha-beta plaits
H: Methyl-coenzyme M reductase subunits
T: Methyl-coenzyme M reductase subunits
F: MCR_beta_N

PF02783 CL0618

Representatives:

e1hbnB2[B:2-188] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

METHYL-COENZYME M REDUCTASE I BETA SUBUNIT ; ligands: GOL,MG,NA ; X-RAY DIFFRACTION 1.160Å

e8gf5C2[C:3-185] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

; ELECTRON MICROSCOPY

e8gf5D1[D:2-185] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

; ELECTRON MICROSCOPY

e8gf6D2[D:2-185] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

; ELECTRON MICROSCOPY

e5a8rB2[B:2-188] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

METHYL-COENZYME M REDUCTASE II SUBUNIT GAMMA ; X-RAY DIFFRACTION 2.15Å

e5a8rE1[E:2-188] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

METHYL-COENZYME M REDUCTASE II SUBUNIT GAMMA ; X-RAY DIFFRACTION 2.15Å

e5a8rH1[H:2-188] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

METHYL-COENZYME M REDUCTASE II SUBUNIT GAMMA ; X-RAY DIFFRACTION 2.15Å

e5a8rK2[K:2-188] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

METHYL-COENZYME M REDUCTASE II SUBUNIT GAMMA ; X-RAY DIFFRACTION 2.15Å

e5a8kB2[B:2-188] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

METHYL-COENZYME M REDUCTASE ; ligands: ETX ; X-RAY DIFFRACTION 1.41Å

e5a8wB2[B:2-188] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

METHYL-COENZYME M REDUCTASE II ; X-RAY DIFFRACTION 1.80Å

e1hboB2[B:2-188] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

METHYL-COENZYME M REDUCTASE I BETA SUBUNIT ; ligands: GOL,NA ; X-RAY DIFFRACTION 1.780Å

e1hbmE2[E:2-188] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

METHYL-COENZYME M REDUCTASE I BETA SUBUNIT ; ligands: GOL,MG ; X-RAY DIFFRACTION 1.800Å

e1hbuB2[B:2-188] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

METHYL-COENZYME M REDUCTASE I BETA SUBUNIT ; ligands: GOL,MG,NA ; X-RAY DIFFRACTION 1.900Å

e1hbnE2[E:2-188] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

METHYL-COENZYME M REDUCTASE I BETA SUBUNIT ; ligands: GOL,MG ; X-RAY DIFFRACTION 1.160Å

e1hboE2[E:2-188] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

METHYL-COENZYME M REDUCTASE I BETA SUBUNIT ; ligands: GOL ; X-RAY DIFFRACTION 1.780Å

e1e6vB2[B:7-189] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

METHYL-COENZYME M REDUCTASE I BETA SUBUNIT ; X-RAY DIFFRACTION 1.600Å

e1mroB2[B:2-188] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

METHYL-COENZYME M REDUCTASE ; X-RAY DIFFRACTION 1.16Å

e1hbuE2[E:2-188] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

METHYL-COENZYME M REDUCTASE I BETA SUBUNIT ; ligands: GOL,MG ; X-RAY DIFFRACTION 1.900Å

e1e6vE2[E:7-189] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

METHYL-COENZYME M REDUCTASE I BETA SUBUNIT ; X-RAY DIFFRACTION 1.600Å

e1hbmB2[B:2-188] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

METHYL-COENZYME M REDUCTASE I BETA SUBUNIT ; ligands: GOL,NA ; X-RAY DIFFRACTION 1.800Å

e1e6yE2[E:5002-5185] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

METHYL-COENZYME M REDUCTASE I BETA SUBUNIT ; ligands: GOL ; X-RAY DIFFRACTION 1.600Å

e1e6yB2[B:2002-2185] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

METHYL-COENZYME M REDUCTASE I BETA SUBUNIT ; ligands: GOL ; X-RAY DIFFRACTION 1.600Å

e1mroE2[E:2-188] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

METHYL-COENZYME M REDUCTASE ; X-RAY DIFFRACTION 1.16Å

e3sqgB2[B:3-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methyl-coenzyme M reductase, beta subunit ; ligands: GOL,P6G,SO4 ; X-RAY DIFFRACTION 2.1Å

e3potB2[B:2-188] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methyl-coenzyme M reductase I subunit beta ; X-RAY DIFFRACTION 1.2Å

e3m1vB2[B:2-188] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methyl-coenzyme M reductase I subunit beta ; X-RAY DIFFRACTION 1.450Å

e3m1vE2[E:2-188] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methyl-coenzyme M reductase I subunit beta ; X-RAY DIFFRACTION 1.450Å

e3m2rB2[B:2-188] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methyl-coenzyme M reductase I subunit beta ; X-RAY DIFFRACTION 1.300Å

e3m2rE2[E:2-188] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methyl-coenzyme M reductase I subunit beta ; X-RAY DIFFRACTION 1.300Å

e3m2uB2[B:2-188] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methyl-coenzyme M reductase I subunit beta ; X-RAY DIFFRACTION 1.40Å

e3m2uE2[E:2-188] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methyl-coenzyme M reductase I subunit beta ; X-RAY DIFFRACTION 1.40Å

e3m2vB2[B:2-188] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methyl-coenzyme M reductase I subunit beta ; X-RAY DIFFRACTION 1.800Å

e3m2vE2[E:2-188] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methyl-coenzyme M reductase I subunit beta ; X-RAY DIFFRACTION 1.800Å

e3m30B2[B:2-188] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methyl-coenzyme M reductase I subunit beta ; X-RAY DIFFRACTION 1.450Å

e3m30E2[E:2-188] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methyl-coenzyme M reductase I subunit beta ; X-RAY DIFFRACTION 1.450Å

e3m32B2[B:2-188] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methyl-coenzyme M reductase I subunit beta ; X-RAY DIFFRACTION 1.350Å

e3m32E2[E:2-188] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methyl-coenzyme M reductase I subunit beta ; X-RAY DIFFRACTION 1.350Å

e3sqgE2[E:3-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methyl-coenzyme M reductase, beta subunit ; ligands: 1PE,GOL ; X-RAY DIFFRACTION 2.1Å

e3sqgH2[H:3-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methyl-coenzyme M reductase, beta subunit ; ligands: 1PE,SO4 ; X-RAY DIFFRACTION 2.1Å

e3potE2[E:2-188] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methyl-coenzyme M reductase I subunit beta ; ligands: MG ; X-RAY DIFFRACTION 1.2Å

e5g0rB2[B:2-188] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

METHYL-COENZYME M REDUCTASE I SUBUNIT BETA ; X-RAY DIFFRACTION 1.25Å

e5g0rE2[E:2-188] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

METHYL-COENZYME M REDUCTASE I SUBUNIT BETA ; ligands: MG ; X-RAY DIFFRACTION 1.25Å

e5a0yB2[B:2-188] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

METHYL-COENZYME M REDUCTASE I SUBUNIT BETA ; X-RAY DIFFRACTION 1.10Å

e5a0yE1[E:2-188] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

METHYL-COENZYME M REDUCTASE I SUBUNIT BETA ; ligands: MG ; X-RAY DIFFRACTION 1.10Å

e5a8kE2[E:2-188] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

METHYL-COENZYME M REDUCTASE ; ligands: ETX,K ; X-RAY DIFFRACTION 1.41Å

e5a8wE1[E:2-188] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

METHYL-COENZYME M REDUCTASE II ; ligands: ACT ; X-RAY DIFFRACTION 1.80Å

e5a8wH2[H:2-188] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

METHYL-COENZYME M REDUCTASE II ; ligands: ACT ; X-RAY DIFFRACTION 1.80Å

e5a8wK1[K:2-188] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

METHYL-COENZYME M REDUCTASE II ; ligands: ACT ; X-RAY DIFFRACTION 1.80Å

e5n28B1[B:2-188] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methyl-coenzyme M reductase, beta subunit ; X-RAY DIFFRACTION 2.80Å

e5n28E1[E:2-188] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methyl-coenzyme M reductase, beta subunit ; X-RAY DIFFRACTION 2.80Å

e5n2aB2[B:2-188] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methyl-coenzyme M reductase, beta subunit ; X-RAY DIFFRACTION 2.80Å

e5n1qB2[B:2-188] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

METHYL-COENZYME M REDUCTASE III FROM METHANOTHERMOCOCCUS THERMOLITHOTROPHICUS SUBUNIT BETA ; ligands: GOL ; X-RAY DIFFRACTION 1.9Å

e5n1qE2[E:2-188] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

METHYL-COENZYME M REDUCTASE III FROM METHANOTHERMOCOCCUS THERMOLITHOTROPHICUS SUBUNIT BETA ; ligands: GOL ; X-RAY DIFFRACTION 1.9Å

e7nkgB2[B:2-184] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methyl-coenzyme M reductase beta subunit ; ligands: GOL,SO4 ; X-RAY DIFFRACTION 1.60Å

e7nkgE2[E:2-184] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methyl-coenzyme M reductase beta subunit ; ligands: GOL,SO4 ; X-RAY DIFFRACTION 1.60Å

e7nkgH2[H:2-184] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methyl-coenzyme M reductase beta subunit ; ligands: SO4 ; X-RAY DIFFRACTION 1.60Å

e7nkgK2[K:2-184] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methyl-coenzyme M reductase beta subunit ; ligands: SO4 ; X-RAY DIFFRACTION 1.60Å

e7b1sB2[B:2-63,B:86-212] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Ethyl-Coenzyme M reductase beta subunit ; ligands: CL,TRS ; X-RAY DIFFRACTION 0.992Å

e7b2hB2[B:2-188] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methyl-coenzyme M reductase I subunit beta ; ligands: CL,MG,PEG,XE ; X-RAY DIFFRACTION 2.120Å

e7b1sE2[E:2-63,E:86-212] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Ethyl-Coenzyme M reductase beta subunit ; ligands: CL,GOL,K,TRS ; X-RAY DIFFRACTION 0.992Å

e7b2cB2[B:2-63,B:86-212] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Ethyl-Coenzyme M reductase beta subunit ; ligands: CL,GOL,K,NA,XE ; X-RAY DIFFRACTION 1.800Å

e7b2cE2[E:2-63,E:86-212] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Ethyl-Coenzyme M reductase beta subunit ; ligands: CL,GOL,K,NA,TRS,XE ; X-RAY DIFFRACTION 1.800Å

e7b2hE2[E:3-188] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methyl-coenzyme M reductase I subunit beta ; ligands: MG,XE ; X-RAY DIFFRACTION 2.120Å

e7sucB2[B:2-188] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methyl-coenzyme M reductase I subunit beta ; ligands: MG ; X-RAY DIFFRACTION 1.9Å

e7sucb1[b:2-188] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methyl-coenzyme M reductase I subunit beta ; X-RAY DIFFRACTION 1.9Å

e7sxmB2[B:2-188] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methyl-coenzyme M reductase I subunit beta ; ligands: XE ; X-RAY DIFFRACTION 2.5030Å

e7sxmE2[E:2-188] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Methyl-coenzyme M reductase I subunit beta ; ligands: XE ; X-RAY DIFFRACTION 2.5030Å

e8gf6C1[C:2-185] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

; ELECTRON MICROSCOPY

X: LuxS, MPP, ThrRS/AlaRS common domain

looks like an elaborated ferredoxin

X: ClpS-like

contains a HTH motif

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