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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: Nitrogenase vanadium-iron protein delta chain
H: Nitrogenase vanadium-iron protein delta chain
T: Nitrogenase vanadium-iron protein delta chain
F: AnfG_VnfG

PF03139

Representatives:

e5n6yC1[C:2-113] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Nitrogenase vanadium-iron protein delta chain ; ligands: MG ; X-RAY DIFFRACTION 1.35Å

e7adrC1[C:1-113] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Nitrogenase vanadium-iron protein delta chain ; ligands: EDO,MG ; X-RAY DIFFRACTION 1.0Å

e7adrF1[F:3-113] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Nitrogenase vanadium-iron protein delta chain ; ligands: EDO,MG ; X-RAY DIFFRACTION 1.0Å

e7adyC1[C:1-113] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Nitrogenase vanadium-iron protein delta chain ; ligands: EDO,MG ; X-RAY DIFFRACTION 1.05Å

e7adyF1[F:3-113] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Nitrogenase vanadium-iron protein delta chain ; ligands: EDO,MG ; X-RAY DIFFRACTION 1.05Å

e7aizC1[C:2-113] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Nitrogenase vanadium-iron protein delta chain ; ligands: EDO ; X-RAY DIFFRACTION 1.05Å

e7aizF1[F:3-113] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Nitrogenase vanadium-iron protein delta chain ; ligands: EDO,MG ; X-RAY DIFFRACTION 1.05Å

e8boqC1[C:14-132] Image Pymol Jmol Links: PDB, SCOP, CATHDOI

; X-RAY DIFFRACTION 1.547Å

e8oieB1[B:5-115] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

; ELECTRON MICROSCOPY

e8boqF1[F:14-132] Image Pymol Jmol Links: PDB, SCOP, CATHDOI

; X-RAY DIFFRACTION 1.547Å

e8oieG1[G:5-115] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

; ELECTRON MICROSCOPY

e5n6yF1[F:3-113] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Nitrogenase vanadium-iron protein delta chain ; ligands: MG ; X-RAY DIFFRACTION 1.35Å

e6feaC1[C:1-113] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Vanadium nitrogenase, delta subunit, VnfG ; ligands: MG ; X-RAY DIFFRACTION 1.20Å

e6feaF1[F:3-113] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Vanadium nitrogenase, delta subunit, VnfG ; ligands: MG ; X-RAY DIFFRACTION 1.20Å

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