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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

X: cradle loop barrel

Refs: Structure 14, 1489-1498; Current opinion in structural biology 18, 358-365

X: SH3
H: LexA/Signal peptidase
T: LexA/Signal peptidase
F: RuBisCo_chap_C

PF18087 CL0299

Representatives:

e4wt4A1[A:286-436] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Rubisco Accumulation Factor 1, isoform 2 ; ligands: PO4 ; X-RAY DIFFRACTION 2.800Å

conformational change

e8ilmS1[S:287-436] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

; ELECTRON MICROSCOPY

e8io2M1[M:287-436] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

; ELECTRON MICROSCOPY

e8io2N1[N:287-436] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

; ELECTRON MICROSCOPY

e8io2O1[O:287-436] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

; ELECTRON MICROSCOPY

e8io2Q1[Q:287-436] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

; ELECTRON MICROSCOPY

e8iojM1[M:287-436] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

; ELECTRON MICROSCOPY

e8iojO1[O:287-436] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

; ELECTRON MICROSCOPY

e8ilmR1[R:288-437] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

; ELECTRON MICROSCOPY

e8io2J1[J:288-437] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

; ELECTRON MICROSCOPY

e8io2K1[K:288-437] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

; ELECTRON MICROSCOPY

e8io2L1[L:288-437] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

; ELECTRON MICROSCOPY

e8io2P1[P:288-437] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

; ELECTRON MICROSCOPY

e8iojL1[L:288-437] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

; ELECTRON MICROSCOPY

e8iojN1[N:288-437] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

; ELECTRON MICROSCOPY

e4wt4B1[B:286-435] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Rubisco Accumulation Factor 1, isoform 2 ; ligands: PO4 ; X-RAY DIFFRACTION 2.800Å

e4wt4C1[C:287-436] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Rubisco Accumulation Factor 1, isoform 2 ; X-RAY DIFFRACTION 2.800Å

e4wt4D1[D:287-434] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Rubisco Accumulation Factor 1, isoform 2 ; ligands: PO4 ; X-RAY DIFFRACTION 2.800Å

e4wt5A1[A:288-437] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Rubisco Accumulation Factor 1, isoform 2 ; X-RAY DIFFRACTION 2.568Å

e4wt5B1[B:287-437] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Rubisco Accumulation Factor 1, isoform 2 ; X-RAY DIFFRACTION 2.568Å

e6kkmE3[E:198-361] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

All5250 protein ; X-RAY DIFFRACTION 3Å

e6kkmF1[F:198-361] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

All5250 protein ; X-RAY DIFFRACTION 3Å

e6kkmG1[G:198-361] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

All5250 protein ; X-RAY DIFFRACTION 3Å

e6kkmH1[H:198-361] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

All5250 protein ; X-RAY DIFFRACTION 3Å

e6kknA1[A:198-347] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

All5250 protein ; X-RAY DIFFRACTION 2.85Å

e6lrrO1[O:206-346] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

All5250 protein ; ELECTRON MICROSCOPY

e6lrrP1[P:205-361] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

All5250 protein ; ELECTRON MICROSCOPY

e6lrrM1[M:206-346] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

All5250 protein ; ELECTRON MICROSCOPY

e6lrrN1[N:205-361] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

All5250 protein ; ELECTRON MICROSCOPY

e6lrrK1[K:206-346] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

All5250 protein ; ELECTRON MICROSCOPY

e6lrrL1[L:205-361] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

All5250 protein ; ELECTRON MICROSCOPY

e6lrrI1[I:206-346] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

All5250 protein ; ELECTRON MICROSCOPY

e6lrrJ1[J:205-361] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

All5250 protein ; ELECTRON MICROSCOPY

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