Exchange of equivalent core secondary structural elements between constituent subunits in homo-oligomeric complexes. The swapped elements in the homo-oligomer have an environment essentially identical to that in the monomer.

Bennett MJ, Schlunegger MP, Eisenberg D.3D domain swapping: a mechanism for oligomer assembly, Protein Sci. 1995 Dec;4(12):2455-68. pubmed

accession codenametypelength
AL00054097 Prion-like proteins homologous 100
AL00050331 MOP-like homologous 64
AL10069117 AhpD-like homologous 168
AL00089155 TorD-like homologous 202
AL00074653 TolA/TonB C-terminal domain homologous 69
AL00054446 ssDNA-binding transcriptional regulator domain homologous 161
AL00055594 HPr-like homologous 84
AL00109622 PurS-like homologous 157
AL00082614 Polo-box domain fragment 81
AL00110848 ParB/Sulfiredoxin homologous 73
AL00055723 Mog1p/PsbP-like homologous 201
AL00101215 KaiA/RbsU domain homologous 90
AL10101215 KaiA/RbsU dimer homologous 180
AL00050475 FMN-binding split barrel homologous 209
AL00055637 Cell cycle regulatory proteins homologous 79
AL00089800 Deoxycytidylate deaminase-like homologous 152
AL00051324 Cyanovirin-N homologous 101
AL00050083 EPS8 SH3 domain homologous 59
AL00052186 Sporulation response regulator Spo0A (N-Spo0A) homologous 123
AL00055563 Growth factor receptor-bound protein 2 (GRB2) homologous 95
AL00050815 Lipocalins homologous 171
AL00051366 Ribulose-phoshate binding beta/alpha-barrels homologous 366
AL00048098 Regulator of G-protein signaling, RGS homologous 122
AL10054593 Glyoxalase/Bleomycin resistance protein/Dihydroxybiphenyl dioxygenase homologous 438
AL00049879 SMAD/FHA domain homologous 234
AL00054407 Cystatins homologous 112
AL00054253 GABARAP/GATE-16/LC3/ATG12 family homologous 88
AL00054403 Cystatin/Monellin-like homologous 108
AL00088995 CUE domain homologous 41
AL00068994 FAT domain of focal adhesion kinase homologous 125
AL00047241 Ferritin-like homologous 152
AL00101117 Flagellar export chaperone FliS homologous 110
AL00054624 Heme-binding protein A (HasA) homologous 173
AL00089048 Polcalcin homologous 76
AL00047305 Interferons/Interleukin-10 (IL-10) family homologous 147
AL00063492 BAG domain homologous 104
AL00051735 NAD(P)-binding Rossmann-fold domains homologous 324