락토페리신

락토페리신
식별자
상징N/A
OPM superfamily203
OPM protein1lfc

락토페리신(lactoferricin)은 양친매성, 양이온성펩타이드항미생물,[1] 항암 능력을 가지고 있다.[2] 락토페린펩신에 의해 매개되는 단백질분해를 거쳐 락토페리신이 생성된다.

젖의 단백질에서 유래하는 항미생물 펩타이드 중 가장 많이 연구되었다. 락토페리신의 완전한 서열은 락토페린의 17-41번 아미노산 잔기(FKCRRWQWRM KKLGAPSITCVRRAF; LFB0084 Archived 2018년 11월 3일 - 웨이백 머신)에 대응하며 이 부분 안의 서열 역시 항미생물 활성을 가진다. MilkAMP 데이터베이스에는 완전한 락토페리신을 구성하고 있거나, 락토페리신에서 유래한 총 111개의 펩타이드(자연적인 경우, 합성된 경우, 변형된 경우 모두 포함)가 등록되어 있다.[3] 사람의 락토페리신은 락토페린의 1-47번 잔기에 대응하지만 1-11과 12-47의 두 소단위체로 구성되어 있다. (LFH0009 Archived 2017년 1월 13일 - 웨이백 머신) 두 소단위체는 서로 이황화 결합으로 연결되어 있다.

사람과 소의 락토페리신은 락토페리신 중에서 가장 많이 연구된 두 형태이다. 이 두 형태의 락토페리신의 서열에는 많은 차이가 존재한다. 소 락토페리신은 25개의 아미노산 잔기를 포함하고 있지만 사람 락토페리신은 49개의 아미노산 잔기로 이루어져 있다.[4] 또한 용액에 넣었을 때 소 락토페리신은 베타 병풍을 형성하지만 사람 락토페리신은 코일 구조를 이룬다.[5]

각주

  1. Wakabayashi H, Takase M, Tomita M (2003). “Lactoferricin derived from milk protein lactoferrin” (PDF). 《Current Pharmaceutical Design》 9 (16): 1277–1287. doi:10.1007/s13594-013-0153-2. PMID 12769736. S2CID 85279971. 
  2. Eliassen LT, Berge G, Sveinbjørnsson B, Svendsen JS, Vorland LH, Rekdal Ø (2002). “Evidence for a direct antitumor mechanism of action of bovine lactoferricin”. 《Anticancer Research》 22 (5): 2703–10. PMID 12529985. 
  3. Théolier J, Fliss I, Jean J, Hammami R (2013). “MilkAMP: a comprehensive database of antimicrobial peptides of dairy origin” (PDF). 《Dairy Science & Technology》 94 (2): 181–193. doi:10.1007/s13594-013-0153-2. PMID 12769736. S2CID 85279971. 
  4. Gifford JL, Hunter HN, Vogel HJ (November 2005). “Lactoferricin: a lactoferrin-derived peptide with antimicrobial, antiviral, antitumor and immunological properties”. 《Cellular and Molecular Life Sciences》 62 (22): 2588–98. doi:10.1007/s00018-005-5373-z. PMID 16261252. 
  5. Hunter HN, Demcoe AR, Jenssen H, Gutteberg TJ, Vogel HJ (August 2005). “Human lactoferricin is partially folded in aqueous solution and is better stabilized in a membrane mimetic solvent”. 《Antimicrobial Agents and Chemotherapy》 49 (8): 3387–95. doi:10.1128/AAC.49.8.3387-3395.2005. PMC 1196233. PMID 16048952. 

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