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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: Flavodoxin-like
H: Ribosomal protein S2/SIS domain
T: Ribosomal protein S2/SIS domain
F: Ribosomal_S2

PF00318 CL0067

Representatives:

e1vi6A1[A:5-197] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

30S ribosomal protein S2P ; ligands: NA ; X-RAY DIFFRACTION 1.85Å

e7syqB1[B:2-218] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

uS2 (SA) ; ELECTRON MICROSCOPY

e7syrB1[B:2-218] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

uS2 (SA) ; ELECTRON MICROSCOPY

e7sysB1[B:2-218] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

uS2 (SA) ; ELECTRON MICROSCOPY

e7sytB1[B:2-218] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

40S ribosomal protein SA ; ELECTRON MICROSCOPY

e7syuB1[B:2-218] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

40S ribosomal protein SA ; ELECTRON MICROSCOPY

e7syvB1[B:2-218] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

40S ribosomal protein SA ; ELECTRON MICROSCOPY

e7sywB1[B:2-218] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

40S ribosomal protein SA ; ELECTRON MICROSCOPY

e7pzyB1[B:2-209] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

40S ribosomal protein S0 ; ELECTRON MICROSCOPY

e7q08B1[B:2-209] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

40S ribosomal protein S0 ; ELECTRON MICROSCOPY

e7q0fB1[B:2-209] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

40S ribosomal protein S0 ; ELECTRON MICROSCOPY

e7q0pB1[B:2-209] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

40S ribosomal protein S0 ; ELECTRON MICROSCOPY

e7q0rB1[B:2-209] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

40S ribosomal protein S0 ; ELECTRON MICROSCOPY

e7zw0sP1[sP:2-207] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

40S ribosomal protein S0-A ; ELECTRON MICROSCOPY

e7qvpRA1[RA:3-214] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

40S ribosomal protein SA ; ELECTRON MICROSCOPY

e7qvpSA1[SA:3-218] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

40S ribosomal protein SA ; ELECTRON MICROSCOPY

e7qcaSA01[SA0:2-222] Image Pymol Jmol Links: PDB, SCOP, CATH

40S ribosomal protein S0 ; ELECTRON MICROSCOPY

e7qggSA1[SA:3-216] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

40S ribosomal protein SA ; ELECTRON MICROSCOPY

e7qjhSA01[SA0:2-222] Image Pymol Jmol Links: PDB, SCOP, CATH

e7qjhRA01[RA0:2-222] Image Pymol Jmol Links: PDB, SCOP, CATH

e7r4xA1[A:2-207] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

40S ribosomal protein SA ; ELECTRON MICROSCOPY

e7wtvA1[A:2-217] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

40S ribosomal protein SA ; ELECTRON MICROSCOPY

e7wtwA1[A:2-217] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

40S ribosomal protein SA ; ELECTRON MICROSCOPY

e7wtxA1[A:2-217] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

40S ribosomal protein SA ; ELECTRON MICROSCOPY

e7wtzA1[A:2-217] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

40S ribosomal protein SA ; ELECTRON MICROSCOPY

e7wu0A1[A:2-217] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

40S ribosomal protein SA ; ELECTRON MICROSCOPY

e8c01P1[P:2-207] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

40S ribosomal protein S0-A ; ELECTRON MICROSCOPY

e7zpqAA1[AA:2-207] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

40S ribosomal protein S0-A ; ELECTRON MICROSCOPY

e7zrsAA1[AA:2-207] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

40S ribosomal protein S0-A ; ELECTRON MICROSCOPY

e7zuwAA1[AA:2-207] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

40S ribosomal protein S0-A ; ELECTRON MICROSCOPY

e7zuxDA1[DA:2-207] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

40S ribosomal protein S0-A ; ELECTRON MICROSCOPY

e8br8SA1[SA:15-210] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

40S ribosomal protein SA ; ELECTRON MICROSCOPY

e8brmSA1[SA:15-210] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Ribosomal protein SA ; ELECTRON MICROSCOPY

e8bsiSA1[SA:14-209] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

40S ribosomal protein SA ; ELECTRON MICROSCOPY

e8bsjSA1[SA:16-209] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

40S ribosomal protein SA ; ELECTRON MICROSCOPY

e8btdSA1[SA:14-210] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Ribosomal protein SA ; ELECTRON MICROSCOPY

e8btrSA1[SA:14-210] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Ribosomal protein SA ; ELECTRON MICROSCOPY

e8bqdP1[P:2-207] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

40S ribosomal protein S0-A ; ELECTRON MICROSCOPY

e8bqxP1[P:2-207] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

40S ribosomal protein S0-A ; ELECTRON MICROSCOPY

e8c83P1[P:2-207] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

40S ribosomal protein S0-A ; ELECTRON MICROSCOPY

e8cahP1[P:2-207] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

40S ribosomal protein S0-A ; ELECTRON MICROSCOPY

e8casP1[P:2-207] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

40S ribosomal protein S0-A ; ELECTRON MICROSCOPY

e8cbjA1[A:2-207] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

40S ribosomal protein S0-A ; ELECTRON MICROSCOPY

e8br3SA01[SA0:2-222] Image Pymol Jmol Links: PDB, SCOP, CATH

e7z3nSA1[SA:3-210] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

40S ribosomal protein S0 ; ELECTRON MICROSCOPY

e7z3oSA1[SA:3-210] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

40S ribosomal protein S0 ; ELECTRON MICROSCOPY

e8auvZ1[Z:5-206] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

uS2 (40S ribosomal protein SA) ; ELECTRON MICROSCOPY

e8b2lZ11[Z1:5-206] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

40S ribosomal protein SA ; ELECTRON MICROSCOPY

e8eubBA1[BA:2-207] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

; ELECTRON MICROSCOPY

e8ccsd1[d:2-207] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

40S ribosomal protein S0-A ; ELECTRON MICROSCOPY

e8bhfB31[B3:2-218] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

; ELECTRON MICROSCOPY

e8p5dSA01[SA0:2-222] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

; ELECTRON MICROSCOPY

e8t4sA1[A:2-214] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

; ELECTRON MICROSCOPY

e8ppkA1[A:2-217] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

40S ribosomal protein SA ; ELECTRON MICROSCOPY

e8hkxAS2P1[AS2P:28-223] Image Pymol Jmol Links: PDB, SCOP, CATH

; ELECTRON MICROSCOPY

e8hkyAS2P1[AS2P:28-223] Image Pymol Jmol Links: PDB, SCOP, CATH

; ligands: UNK ; ELECTRON MICROSCOPY

e8hl2AS2P1[AS2P:28-223] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

30S ribosomal protein S2 ; ligands: UNK ; ELECTRON MICROSCOPY

e8hl5AS2P1[AS2P:28-223] Image Pymol Jmol Links: PDB, SCOP, CATH

; ligands: UNK ; ELECTRON MICROSCOPY

e8a98SB1[SB:1-211] Image Pymol Jmol Links: PDB, SCOP, CATH

40S ribosomal protein SA ; ELECTRON MICROSCOPY

e8q5iB1[B:2-209] Image Pymol Jmol Links: PDB, SCOP, CATHDOI

; ELECTRON MICROSCOPY

Previous

e4z8c1b1[1b:7-237] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

30S ribosomal protein S2 ; ligands: MG ; X-RAY DIFFRACTION 2.800Å

e3j9mAB1[AB:58-274] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

uS2m ; ligands: ZN ; ELECTRON MICROSCOPY

e4v4vAB1[AB:5-240] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

30S ribosomal subunit protein S2 ; 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.

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