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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

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

X: P-loop domains-like
H: P-loop domains-related
T: P-loop containing nucleoside triphosphate hydrolases
F: cobW

PF02492 CL0023

Representatives:

e1nijA2[A:2-223] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Hypothetical protein yjiA ; X-RAY DIFFRACTION 2.0Å

e5xktA1[A:66-204] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Urease accessory protein UreG ; ligands: GNP,NI ; X-RAY DIFFRACTION 1.80Å

e5xktB2[B:66-204] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Urease accessory protein UreG ; ligands: GNP,NI ; X-RAY DIFFRACTION 1.80Å

e4hi0E2[E:1-59] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Urease accessory protein UreG ; ligands: GDP ; X-RAY DIFFRACTION 2.35Å

e4hi0F2[F:1-59] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Urease accessory protein UreG ; ligands: GDP ; X-RAY DIFFRACTION 2.35Å

e5xktA2[A:6-65] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Urease accessory protein UreG ; ligands: GNP,NI ; X-RAY DIFFRACTION 1.80Å

e5xktB1[B:6-65] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Urease accessory protein UreG ; ligands: GNP,NI ; X-RAY DIFFRACTION 1.80Å

e4hi0E1[E:60-196] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Urease accessory protein UreG ; ligands: GDP ; X-RAY DIFFRACTION 2.35Å

e4hi0F1[F:60-196] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Urease accessory protein UreG ; ligands: GDP ; X-RAY DIFFRACTION 2.35Å

e2hf8A1[A:11-221] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROBABLE HYDROGENASE NICKEL INCORPORATION PROTEIN HYPB ; ligands: GSP,MG,ZN ; X-RAY DIFFRACTION 2.1Å

e2wsmB1[B:9-211] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HYDROGENASE EXPRESSION/FORMATION PROTEIN (HYPB) ; ligands: CL ; X-RAY DIFFRACTION 2.3Å

e4ixmB2[B:1-222] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

UNCHARACTERIZED GTP-BINDING PROTEIN YJIA ; ligands: SO4,ZN ; X-RAY DIFFRACTION 2.57Å

e4ixnA2[A:1-223] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Uncharacterized GTP-binding protein YjiA ; ligands: SO4,ZN ; X-RAY DIFFRACTION 2.05Å

e4ixnB2[B:1-223] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Uncharacterized GTP-binding protein YjiA ; ligands: SO4,ZN ; X-RAY DIFFRACTION 2.05Å

e4ixmA2[A:1-223] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

UNCHARACTERIZED GTP-BINDING PROTEIN YJIA ; ligands: SO4,ZN ; X-RAY DIFFRACTION 2.57Å

e2wsmA2[A:11-213] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HYDROGENASE EXPRESSION/FORMATION PROTEIN (HYPB) ; ligands: CL ; X-RAY DIFFRACTION 2.3Å

e2hf8B1[B:12-220] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROBABLE HYDROGENASE NICKEL INCORPORATION PROTEIN HYPB ; ligands: GSP,MG,ZN ; X-RAY DIFFRACTION 2.1Å

e2hf9A1[A:11-221] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROBABLE HYDROGENASE NICKEL INCORPORATION PROTEIN HYPB ; ligands: GSP,MG,ZN ; X-RAY DIFFRACTION 1.9Å

e2hf9B1[B:12-220] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROBABLE HYDROGENASE NICKEL INCORPORATION PROTEIN HYPB ; ligands: GSP,MG,ZN ; X-RAY DIFFRACTION 1.9Å

e4lpsA1[A:28-242] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HYDROGENASE/UREASE NICKEL INCORPORATION PROTEIN HYPB ; ligands: GDP,GOL,MG,MLI,NI,PO4 ; X-RAY DIFFRACTION 2.0Å

e4lpsB1[B:28-242] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HYDROGENASE/UREASE NICKEL INCORPORATION PROTEIN HYPB ; ligands: GDP,GOL,MG,MLI,NI,PO4 ; X-RAY DIFFRACTION 2.0Å

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.

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