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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

H: RIFT-related
T: acid protease

126354, 3-crossover-4

F: Asp

PF00026 CL0129

Representatives:

e1oewA2[A:1-177] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ENDOTHIAPEPSIN ; ligands: SER,SO4,THR ; X-RAY DIFFRACTION 0.91Å

e1oewA3[A:178-329] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ENDOTHIAPEPSIN ; ligands: GOL,SER,SO4,THR ; X-RAY DIFFRACTION 0.91Å

e1wkrA2[A:1-169] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

POLYPOROPEPSIN ; ligands: SO4 ; X-RAY DIFFRACTION 1.3Å

e1wkrA3[A:170-340] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

POLYPOROPEPSIN ; ligands: SO4 ; X-RAY DIFFRACTION 1.3Å

e2qp8A2[A:245-447] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: SC7 ; X-RAY DIFFRACTION 1.500Å

e2qp8A3[A:58-244] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: SC7,TAR ; X-RAY DIFFRACTION 1.500Å

e2bjuA2[A:1-177] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PLASMEPSIN II ; ligands: IH4 ; X-RAY DIFFRACTION 1.56Å

e2bjuA3[A:178-329] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PLASMEPSIN II ; ligands: IH4 ; X-RAY DIFFRACTION 1.56Å

e1dpjA2[A:0-147] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEINASE A ; ligands: NAG ; X-RAY DIFFRACTION 1.78Å

e1dpjA3[A:148-326] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEINASE A ; ligands: NAG,SO4 ; X-RAY DIFFRACTION 1.78Å

e1j71A1[A:1-179] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Aspartic proteinase ; ligands: EOH ; X-RAY DIFFRACTION 1.8Å

e1j71A2[A:180-334] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Aspartic proteinase ; ligands: EOH ; X-RAY DIFFRACTION 1.8Å

e3qvcA1[A:77P-328] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HISTO-ASPARTIC PROTEASE ; ligands: EDO ; X-RAY DIFFRACTION 2.1Å

e4zl4A2[A:273-470] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Aspartic protease PM5 ; ligands: 4PK,EDO,SO4 ; X-RAY DIFFRACTION 2.37Å

e4obz.1[C:-4-98,D:106-346] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Cathepsin D heavy chain & Cathepsin D light chain ; ligands: NAG ; X-RAY DIFFRACTION 2.90Å

e1mppA1[A:-1-174] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PEPSIN ; ligands: SO4 ; X-RAY DIFFRACTION

e1mppA2[A:175-332] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PEPSIN ; X-RAY DIFFRACTION

e1smrA2[A:-2-174] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RENIN ; X-RAY DIFFRACTION

e1smrA3[A:175-326] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RENIN ; X-RAY DIFFRACTION

e5r3qA1[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; X-RAY DIFFRACTION 1.01Å

e5r3rA2[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; X-RAY DIFFRACTION 0.98Å

e5r3sA1[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; X-RAY DIFFRACTION 1.05Å

e5r3tA1[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; X-RAY DIFFRACTION 1.07Å

e5r3uA2[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; X-RAY DIFFRACTION 1.09Å

e5r3vA1[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; X-RAY DIFFRACTION 1.12Å

e5r3wA1[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; X-RAY DIFFRACTION 1.19Å

e5r3xA2[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; X-RAY DIFFRACTION 1.16Å

e5r3yA1[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; X-RAY DIFFRACTION 1.04Å

e5r3zA2[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; X-RAY DIFFRACTION 1.07Å

e5r40A1[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; X-RAY DIFFRACTION 1.07Å

e5r41A2[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; X-RAY DIFFRACTION 1.08Å

e5rboA2[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; ligands: DMS,PG4,R8A ; X-RAY DIFFRACTION 1.08Å

e5rbpA1[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; ligands: DMS,PG4,SYG ; X-RAY DIFFRACTION 1.05Å

e5rbqA2[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; ligands: DMS,PG4,R8P ; X-RAY DIFFRACTION 1.04Å

e5rbrA2[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; ligands: ACT,DMS,PG4,R8S ; X-RAY DIFFRACTION 0.90Å

e5rbsA1[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; ligands: DMS,PG4,R8V ; X-RAY DIFFRACTION 1.00Å

e5rbtA1[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; ligands: DMS,PG4 ; X-RAY DIFFRACTION 1.12Å

e5rbuA1[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; ligands: DMS,PG4,R97 ; X-RAY DIFFRACTION 1.01Å

e5rbvA2[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; ligands: DMS,GOL,PG4,RQD ; X-RAY DIFFRACTION 0.98Å

e5rbwA1[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; ligands: DMS,PG4,R9G ; X-RAY DIFFRACTION 0.95Å

e5rbxA2[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; ligands: DMS,PG4,R9J ; X-RAY DIFFRACTION 1.00Å

e5rbyA1[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; ligands: DMS,PG4 ; X-RAY DIFFRACTION 1.10Å

e5rbzA1[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; ligands: DMS,PG4,R9S ; X-RAY DIFFRACTION 1.14Å

e5rc0A2[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; ligands: DMS,PG4,R9V ; X-RAY DIFFRACTION 1.03Å

e5rc1A2[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; ligands: DMS,PG4,R9Y ; X-RAY DIFFRACTION 1.05Å

e5rc2A2[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; ligands: DMS,PG4 ; X-RAY DIFFRACTION 0.97Å

e5rc3A2[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; ligands: DMS,PG4,RAY ; X-RAY DIFFRACTION 0.98Å

e5rc4A2[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; ligands: DMS,PG4,RB7 ; X-RAY DIFFRACTION 1.00Å

e5rc5A2[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; ligands: DMS,GOL,PG4,RBG ; X-RAY DIFFRACTION 1.03Å

e5rc6A1[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; ligands: DMS,PG4,RBJ ; X-RAY DIFFRACTION 1.18Å

e5rc7A2[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; ligands: AES,DMS,PG4 ; X-RAY DIFFRACTION 0.97Å

e5rc8A1[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; ligands: DMS,PG4,RCV ; X-RAY DIFFRACTION 1.04Å

e5rc9A1[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; ligands: DMS,PG4,RD4 ; X-RAY DIFFRACTION 1.08Å

e5rcaA1[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; ligands: DMS,PG4,RDJ ; X-RAY DIFFRACTION 1.04Å

e5rcbA2[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; ligands: DMS,PG4 ; X-RAY DIFFRACTION 0.99Å

e5rccA1[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; ligands: DMS,RDV ; X-RAY DIFFRACTION 1.04Å

e5rcdA2[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; ligands: DMS,PG4 ; X-RAY DIFFRACTION 1.02Å

e5rceA2[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; ligands: DMS,PG4,RE4 ; X-RAY DIFFRACTION 1.05Å

e5rcfA1[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; ligands: DMS,PG4,RE7 ; X-RAY DIFFRACTION 1.00Å

e5rcgA1[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; ligands: DMS,PG4,REG ; X-RAY DIFFRACTION 1.23Å

e5rchA2[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; X-RAY DIFFRACTION 1.22Å

e5rciA2[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; ligands: PG4 ; X-RAY DIFFRACTION 1.23Å

e5rcjA2[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; ligands: PG4 ; X-RAY DIFFRACTION 1.00Å

e5rckA1[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; ligands: PG4 ; X-RAY DIFFRACTION 0.92Å

e5rclA2[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; X-RAY DIFFRACTION 1.01Å

e5rcmA2[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; X-RAY DIFFRACTION 1.03Å

e5rcnA2[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; ligands: PG4 ; X-RAY DIFFRACTION 1.03Å

e5rcoA1[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; ligands: PG4 ; X-RAY DIFFRACTION 1.21Å

e5rcpA2[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; ligands: PG4 ; X-RAY DIFFRACTION 1.08Å

e5rcqA2[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; X-RAY DIFFRACTION 1.34Å

e5rcrA1[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; ligands: PG4 ; X-RAY DIFFRACTION 1.05Å

e5rcsA1[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; X-RAY DIFFRACTION 0.97Å

e5rctA1[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; ligands: PG4 ; X-RAY DIFFRACTION 1.01Å

e5rcuA1[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; ligands: PG4 ; X-RAY DIFFRACTION 1.10Å

e5rcvA1[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; X-RAY DIFFRACTION 0.95Å

e5rcwA1[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; ligands: PG4 ; X-RAY DIFFRACTION 1.04Å

e5rcxA2[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; X-RAY DIFFRACTION 1.04Å

e5rcyA2[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; ligands: PG4 ; X-RAY DIFFRACTION 1.11Å

e5rczA2[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; X-RAY DIFFRACTION 1.04Å

e5rd0A1[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; ligands: PG4 ; X-RAY DIFFRACTION 1.04Å

e5rd1A2[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; ligands: PG4 ; X-RAY DIFFRACTION 1.00Å

e5rd2A2[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; X-RAY DIFFRACTION 1.08Å

e5rd3A1[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; ligands: PG4 ; X-RAY DIFFRACTION 0.93Å

e5rd4A1[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; X-RAY DIFFRACTION 1.18Å

e5rd5A2[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; ligands: PG4 ; X-RAY DIFFRACTION 1.15Å

e5rd6A2[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; ligands: PG4 ; X-RAY DIFFRACTION 1.13Å

e5rd7A1[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; X-RAY DIFFRACTION 1.03Å

e5rd8A1[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; ligands: PG4 ; X-RAY DIFFRACTION 0.98Å

e5rd9A2[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; X-RAY DIFFRACTION 1.11Å

e5rdaA1[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; X-RAY DIFFRACTION 0.98Å

e5rdbA2[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; ligands: PG4 ; X-RAY DIFFRACTION 1.04Å

e5rdcA1[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; ligands: PG4 ; X-RAY DIFFRACTION 1.02Å

e5rddA2[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; ligands: PG4 ; X-RAY DIFFRACTION 1.03Å

e5rdeA2[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; X-RAY DIFFRACTION 1.01Å

e5rdfA1[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; ligands: PG4 ; X-RAY DIFFRACTION 0.97Å

e5rdgA2[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; X-RAY DIFFRACTION 1.12Å

e5rdhA1[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; X-RAY DIFFRACTION 0.85Å

e5rdiA2[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; X-RAY DIFFRACTION 1.00Å

e5rdjA2[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; ligands: PG4 ; X-RAY DIFFRACTION 0.93Å

e5rdkA1[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; ligands: PG4 ; X-RAY DIFFRACTION 1.03Å

e5rdlA1[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; ligands: PG4 ; X-RAY DIFFRACTION 1.09Å

e5rdmA1[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; X-RAY DIFFRACTION 1.01Å

e5rdnA1[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; ligands: PG4 ; X-RAY DIFFRACTION 0.98Å

e5rdoA2[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; X-RAY DIFFRACTION 1.06Å

e5rdpA2[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; X-RAY DIFFRACTION 0.97Å

e5rdqA2[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; X-RAY DIFFRACTION 1.04Å

e5rdrA1[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; X-RAY DIFFRACTION 1.03Å

e5rdsA2[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; X-RAY DIFFRACTION 0.97Å

e5rdtA1[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; X-RAY DIFFRACTION 1.04Å

e5rduA2[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; X-RAY DIFFRACTION 1.05Å

e5rdvA1[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; X-RAY DIFFRACTION 1.08Å

e5rdwA2[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; X-RAY DIFFRACTION 1.03Å

e5rdxA1[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; X-RAY DIFFRACTION 0.98Å

e5rdyA2[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; X-RAY DIFFRACTION 1.13Å

e5rdzA2[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; X-RAY DIFFRACTION 1.14Å

e5re0A2[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; X-RAY DIFFRACTION 1.03Å

e5re1A1[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; X-RAY DIFFRACTION 0.97Å

e5re2A1[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; X-RAY DIFFRACTION 1.00Å

e5re3A2[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endothiapepsin ; ligands: PG4 ; X-RAY DIFFRACTION 1.09Å

e6ronA1[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH

Endothiapepsin ; ligands: DMS,KCE ; X-RAY DIFFRACTION 1.13Å

e6rsvA1[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH

Endothiapepsin ; ligands: DMS,KHW ; X-RAY DIFFRACTION 1.10Å

e5qcwB1[B:-2-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: AR9 ; X-RAY DIFFRACTION 2.104Å

e5qd0A2[A:-2-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: E5Y ; X-RAY DIFFRACTION 2.600Å

e5qcoA1[A:-2-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: E4A ; X-RAY DIFFRACTION 2.700Å

e5qcoB1[B:-2-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: E4A ; X-RAY DIFFRACTION 2.700Å

e5qcoC1[C:-2-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: E4A ; X-RAY DIFFRACTION 2.700Å

e5qcpA2[A:-2-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: E4G ; X-RAY DIFFRACTION 2.450Å

e5qcpB1[B:-2-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: E4G ; X-RAY DIFFRACTION 2.450Å

e5qcpC1[C:-2-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: E4G ; X-RAY DIFFRACTION 2.450Å

e5qcqA1[A:-2-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: AFJ ; X-RAY DIFFRACTION 1.971Å

e5qcqB2[B:-2-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: AFJ ; X-RAY DIFFRACTION 1.971Å

e5qcqC1[C:-2-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: AFJ ; X-RAY DIFFRACTION 1.971Å

e5qcrA1[A:-2-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: E4J,SO4 ; X-RAY DIFFRACTION 2.200Å

e5qcrB2[B:-2-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: E4J,SO4 ; X-RAY DIFFRACTION 2.200Å

e5qcrC2[C:-2-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: E4J,SO4 ; X-RAY DIFFRACTION 2.200Å

e5qcsA2[A:-2-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: AXF ; X-RAY DIFFRACTION 2.305Å

e5qcsB1[B:-2-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: AXF ; X-RAY DIFFRACTION 2.305Å

e5qcsC2[C:-2-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: AXF ; X-RAY DIFFRACTION 2.305Å

e5qctA2[A:-2-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: E4Y ; X-RAY DIFFRACTION 2.050Å

e5qctB1[B:-2-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: E4Y ; X-RAY DIFFRACTION 2.050Å

e5qctC2[C:-2-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: E4Y ; X-RAY DIFFRACTION 2.050Å

e5qcuA1[A:-2-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: E51 ; X-RAY DIFFRACTION 1.9510Å

e5qcuB1[B:-2-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: E51 ; X-RAY DIFFRACTION 1.9510Å

e5qcuC2[C:-2-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: E51 ; X-RAY DIFFRACTION 1.9510Å

e5qcvA2[A:-2-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: E5A ; X-RAY DIFFRACTION 2.250Å

e5qcvB2[B:-2-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: E5A ; X-RAY DIFFRACTION 2.250Å

e5qcvC2[C:-2-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: E5A ; X-RAY DIFFRACTION 2.250Å

e5qcwA1[A:-2-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: AR9 ; X-RAY DIFFRACTION 2.104Å

e5qcwC1[C:-2-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: AR9 ; X-RAY DIFFRACTION 2.104Å

e5qcxA1[A:-2-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: E5D ; X-RAY DIFFRACTION 2.200Å

e5qcxB2[B:-2-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: E5D ; X-RAY DIFFRACTION 2.200Å

e5qcxC1[C:-2-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: E5D ; X-RAY DIFFRACTION 2.200Å

e5qcyA2[A:-2-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: E5P ; X-RAY DIFFRACTION 2.152Å

e5qcyB1[B:-2-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: E5P ; X-RAY DIFFRACTION 2.152Å

e5qcyC1[C:-2-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: E5P ; X-RAY DIFFRACTION 2.152Å

e5qczA2[A:-2-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: E5V ; X-RAY DIFFRACTION 2.300Å

e5qczB2[B:-2-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: E5V ; X-RAY DIFFRACTION 2.300Å

e5qczC1[C:-2-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: E5V ; X-RAY DIFFRACTION 2.300Å

e5qd0B1[B:-2-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: E5Y ; X-RAY DIFFRACTION 2.600Å

e5qd0C1[C:-2-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: E5Y ; X-RAY DIFFRACTION 2.600Å

e5qd1A1[A:-2-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: E61 ; X-RAY DIFFRACTION 2.400Å

e5qd1B2[B:-2-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: E61 ; X-RAY DIFFRACTION 2.400Å

e5qd1C2[C:-2-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: E61 ; X-RAY DIFFRACTION 2.400Å

e5qd2A1[A:-2-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: E6J ; X-RAY DIFFRACTION 2.500Å

e5qd2B1[B:-2-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: E6J ; X-RAY DIFFRACTION 2.500Å

e5qd2C2[C:-2-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: E6J ; X-RAY DIFFRACTION 2.500Å

e5qd3A1[A:-2-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: E6M ; X-RAY DIFFRACTION 2.460Å

e5qd3B2[B:-2-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: E6M ; X-RAY DIFFRACTION 2.460Å

e5qd3C2[C:-2-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: E6M ; X-RAY DIFFRACTION 2.460Å

e5qd4A2[A:-2-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: AXQ ; X-RAY DIFFRACTION 2.1120Å

e5qd4B1[B:-2-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: AXQ ; X-RAY DIFFRACTION 2.1120Å

e5qd4C2[C:-2-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: AXQ ; X-RAY DIFFRACTION 2.1120Å

e5qd5A1[A:-2-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: E6P ; X-RAY DIFFRACTION 2.300Å

e5qd5B1[B:-2-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: E6P ; X-RAY DIFFRACTION 2.300Å

e5qd5C1[C:-2-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: E6P ; X-RAY DIFFRACTION 2.300Å

e5qd6A1[A:-2-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: E6S ; X-RAY DIFFRACTION 2.505Å

e5qd6B2[B:-2-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: E6S ; X-RAY DIFFRACTION 2.505Å

e5qd6C2[C:-2-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: E6S ; X-RAY DIFFRACTION 2.505Å

e5qd7A1[A:-2-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: 0BI ; X-RAY DIFFRACTION 2.120Å

e5qd7B1[B:-2-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: 0BI ; X-RAY DIFFRACTION 2.120Å

e5qd7C1[C:-2-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: 0BI ; X-RAY DIFFRACTION 2.120Å

e5qd8A1[A:-2-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: E6V ; X-RAY DIFFRACTION 2.450Å

e5qd8B1[B:-2-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: E6V ; X-RAY DIFFRACTION 2.450Å

e5qd8C2[C:-2-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: E6V ; X-RAY DIFFRACTION 2.450Å

e5qd9A2[A:-2-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: E6Y ; X-RAY DIFFRACTION 2.6020Å

e5qd9B1[B:-2-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: E6Y ; X-RAY DIFFRACTION 2.6020Å

e5qd9C1[C:-2-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: E6Y ; X-RAY DIFFRACTION 2.6020Å

e5qdaA2[A:-2-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: E74 ; X-RAY DIFFRACTION 2.100Å

e5qdaB2[B:-2-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: E74 ; X-RAY DIFFRACTION 2.100Å

e5qdaC2[C:-2-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: E74 ; X-RAY DIFFRACTION 2.100Å

e5qdbA2[A:-2-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: BAV ; X-RAY DIFFRACTION 2.100Å

e5qdbB1[B:-2-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: BAV ; X-RAY DIFFRACTION 2.100Å

e5qdbC1[C:-2-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: BAV ; X-RAY DIFFRACTION 2.100Å

e5qdcA1[A:-2-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: E77,GOL ; X-RAY DIFFRACTION 2.100Å

e5qdcB1[B:-2-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: E77,GOL ; X-RAY DIFFRACTION 2.100Å

e5qdcC2[C:-2-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: E77,GOL ; X-RAY DIFFRACTION 2.100Å

e5qddA1[A:-2-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: E7A,GOL ; X-RAY DIFFRACTION 2.003Å

e5qddB1[B:-2-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: E7A,GOL ; X-RAY DIFFRACTION 2.003Å

e5qddC2[C:-2-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: E7A,GOL ; X-RAY DIFFRACTION 2.003Å

e6wnyA2[A:60-244] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: IOD,U64 ; X-RAY DIFFRACTION 1.86Å

e6scvA1[A:1-178] Image Pymol Jmol Links: PDB, SCOP, CATH

Endothiapepsin ; ligands: L7K ; X-RAY DIFFRACTION 1.70Å

e6uj0A2[A:17-196] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 2 ; X-RAY DIFFRACTION 2.14Å

e6uj1A1[A:16-196] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 2 ; ligands: L3M ; X-RAY DIFFRACTION 3.0Å

e6uj1B2[B:15-196] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 2 ; ligands: L3M ; X-RAY DIFFRACTION 3.0Å

e6uj0B1[B:16-196] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 2 ; X-RAY DIFFRACTION 2.14Å

e6r5hA1[A:7-356] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endopeptidase ; ligands: 1PE,ACY,EDO,NA,PEG,PG4,PGE,SO4 ; X-RAY DIFFRACTION 1.750Å

e7agbA1[A:1-181] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Candidapepsin ; ligands: 1PE,MES,NA,PGE ; X-RAY DIFFRACTION 1.70Å

e7d2vA2[A:-5-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: 66F,GOL,IOD ; X-RAY DIFFRACTION 2.1Å

e7b1qA1[A:46P-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: SLK ; X-RAY DIFFRACTION 1.940Å

e7d5bA1[A:13-196] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 2 ; ligands: 66F,CL,NA ; X-RAY DIFFRACTION 1.310Å

e7dczA2[A:-4-183] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-secretase 1 ; ligands: GOL,H3C,IOD ; X-RAY DIFFRACTION 2.300Å

e6r61A1[A:7-356] Image Pymol Jmol Links: PDB, SCOP, CATH

Endopeptidase ; ligands: CL,JT8,NA,PEG,PGE,SO4 ; X-RAY DIFFRACTION 1.810Å

e6r6aA1[A:7-356] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endopeptidase ; ligands: 1PE,NA,PEG,PGE,SO4 ; X-RAY DIFFRACTION 1.800Å

e7agbB2[B:1-181] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Candidapepsin ; ligands: MES,NA,PE3,PGE ; X-RAY DIFFRACTION 1.70Å

e7agbC1[C:1-181] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Candidapepsin ; ligands: MES,NA,PGE ; X-RAY DIFFRACTION 1.70Å

e7agbD1[D:1-181] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Candidapepsin ; ligands: 1PE,MES,NA,PGE ; X-RAY DIFFRACTION 1.70Å

e7agcA1[A:1-181] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Candidapepsin ; ligands: FOR,MES,PEG,PGE ; X-RAY DIFFRACTION 1.35Å

e7agcB1[B:1-181] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Candidapepsin ; ligands: FOR,MES ; X-RAY DIFFRACTION 1.35Å

e7agcD1[D:1-181] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Candidapepsin ; ligands: FOR ; X-RAY DIFFRACTION 1.35Å

Previous Next

e2aprA2[A:1-178] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RHIZOPUSPEPSIN ; ligands: CA ; X-RAY DIFFRACTION

e2aprA3[A:179-325] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RHIZOPUSPEPSIN ; ligands: CA ; X-RAY DIFFRACTION

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.

T: double psi

152436, 2-crossover-3, 5-crossover-6

T: AbrB

122'1'344'3', 2-crossover-3, 2'-crossover-3'

T: Bacterial fluorinating enzyme-C

1265437, 2-crossover-3, 6-crossover-7

T: FMN-binding split barrel

123654, 3-crossover-4

T: Surface presentation of antigens (SPOA)

123654, 3-crossover-4, swapping

T: Alanine racemase-C

125436, 2-crossover-3, 5-crossover-6

T: Aminomethyltransferase beta-barrel domain

143256, 1-crossover-2, 4-crossover-5

T: PUA domain

12543, 2-crossover-3

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