蛋白三聚體

蛋白三聚體（protein trimer）為三個蛋白質聚合而成的複合體，一般是以非共價作用力聚合而成。由三個相同蛋白質形成的三聚體稱為同源三聚體，如第三型膠原蛋白[1]、真核生物的DNA夾（由三個增殖細胞核抗原組成）[2]和冠狀病毒表面的刺突[3]；由三個相異蛋白質形成的三聚體則稱為異源三聚體，如古菌的DNA夾（由PCNA1、PCNA2和PCNA3組成）[2]。

由三個增殖細胞核抗原組成的DNA夾

參考文獻

Kuivaniemi, Helena; Tromp, Gerard. . Gene. 2019, 707: 151–171. ISSN 0378-1119. doi:10.1016/j.gene.2019.05.003.
Moldovan, George-Lucian; Pfander, Boris; Jentsch, Stefan. . Cell. 2007, 129 (4): 665–679. ISSN 0092-8674. doi:10.1016/j.cell.2007.05.003.
Walls, Alexandra C.; Tortorici, M. Alejandra; Bosch, Berend-Jan; Frenz, Brandon; Rottier, Peter J. M.; DiMaio, Frank; Rey, Félix A.; Veesler, David. . Nature. 2016, 531 (7592): 114–117. ISSN 0028-0836. doi:10.1038/nature16988.

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[KuivaniemiTromp2019-1] Kuivaniemi, Helena; Tromp, Gerard. . Gene. 2019, 707: 151–171. ISSN 0378-1119. doi:10.1016/j.gene.2019.05.003.

[MoldovanPfander2007-2] Moldovan, George-Lucian; Pfander, Boris; Jentsch, Stefan. . Cell. 2007, 129 (4): 665–679. ISSN 0092-8674. doi:10.1016/j.cell.2007.05.003.

[WallsTortorici2016-3] Walls, Alexandra C.; Tortorici, M. Alejandra; Bosch, Berend-Jan; Frenz, Brandon; Rottier, Peter J. M.; DiMaio, Frank; Rey, Félix A.; Veesler, David. . Nature. 2016, 531 (7592): 114–117. ISSN 0028-0836. doi:10.1038/nature16988.