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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: LuxS, MPP, ThrRS/AlaRS common domain

looks like an elaborated ferredoxin

X: ClpS-like

contains a HTH motif

X: Ribosomal protein S5 domain 2-like
H: Ribosomal protein S5 domain 2-like
T: Ribosomal protein S5 domain 2-like
F: Ribosomal_S5_C

PF03719 CL0329

Representatives:

e1pkpA2[A:78-148] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RIBOSOMAL PROTEIN S5 ; X-RAY DIFFRACTION

e3j6vE3[E:287-430] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH Obsolete PDB

e4v6iAE3[AE:176-254] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

40S ribosomal protein rpS2 (S5p) ; ELECTRON MICROSCOPY

e8c83R3[R:176-249] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

40S ribosomal protein S2 ; ELECTRON MICROSCOPY

e8cahR2[R:176-249] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

40S ribosomal protein S2 ; ligands: MG ; ELECTRON MICROSCOPY

e8casR1[R:176-249] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

40S ribosomal protein S2 ; ELECTRON MICROSCOPY

e8cbjC3[C:176-250] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

40S ribosomal protein S2 ; ELECTRON MICROSCOPY

e8q5iD2[D:171-244] Image Pymol Jmol Links: PDB, SCOP, CATHDOI

; ELECTRON MICROSCOPY

e8p5dSC01[SC0:168-248] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

; ELECTRON MICROSCOPY

e8auvc1[c:186-259] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

uS5 (40S ribosomal protein S2) ; ELECTRON MICROSCOPY

e8b2lc12[c1:186-259] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

40S ribosomal protein S2-3-like ; ELECTRON MICROSCOPY

e8t4sC3[C:202-276] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

; ligands: MG ; ELECTRON MICROSCOPY

e8ppkC2[C:202-278] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

40S ribosomal protein S2 ; ELECTRON MICROSCOPY

e8p2kAb1[Ab:202-276] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

40S ribosomal protein S2 ; ELECTRON MICROSCOPY

e8bhfD31[D3:202-278] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

; ELECTRON MICROSCOPY

e8a98SF3[SF:188-263] Image Pymol Jmol Links: PDB, SCOP, CATH

40S ribosomal protein S2 ; ELECTRON MICROSCOPY

e8eubBC1[BC:176-250] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

; ELECTRON MICROSCOPY

e8ccsf2[f:176-250] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

40S ribosomal protein S2 ; ELECTRON MICROSCOPY

Previous

e5o5jE2[E:104-214] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

30S ribosomal protein S5 ; ligands: MG ; ELECTRON MICROSCOPY

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 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