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The lectin pathway or lectin complement pathway is a type of cascade reaction in the complement system, similar in structure to the classical complement pathway, in that, after activation, it proceeds through the action of C4 and C2 to produce activated complement proteins further down the cascade. In contrast to the classical complement pathway, the lectin pathway does not recognize an antibody bound to its target. The lectin pathway starts with mannose-binding lectin (MBL) or ficolin binding to certain sugars.

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  • The lectin pathway or lectin complement pathway is a type of cascade reaction in the complement system, similar in structure to the classical complement pathway, in that, after activation, it proceeds through the action of C4 and C2 to produce activated complement proteins further down the cascade. In contrast to the classical complement pathway, the lectin pathway does not recognize an antibody bound to its target. The lectin pathway starts with mannose-binding lectin (MBL) or ficolin binding to certain sugars. In this pathway, mannose-binding lectin binds to mannose, glucose, or other sugars with 3- and 4-OH groups placed in the equatorial plane, in terminal positions on carbohydrate or glycoprotein components of microorganisms including bacteria such as Salmonella, Listeria, and Neisseria strains. Fungal pathogens such as Candida albicans and Cryptococcus neoformans as well as some viruses such as HIV-1 and Respiratory syncytial virus (RSV) are bound by MBL. Mannan-binding lectin, also called mannose-binding protein, is a protein belonging to the collectin family that is produced by the liver and can initiate the complement cascade by binding to pathogen surfaces. (en)
  • Lintasan MBL (bahasa Inggris: mannan-binding lectin pathway, Ali/Krueger pathway) adalah lintasan pada sistem komplemen yang menggunakan protein serupa dengan C1q seperti pada , yang mengikat senyawa mannos yang tampak pada karbohidrat pada permukaan bakteri maupun virus. Ikatan yang terjadi antara lektin, protein dari golongan yang diproduksi oleh hati, dengan mannosa merupakan . Kompleks protein MBL, lebih lanjut membentuk ikatan kompleks menjadi (bahasa Inggris: Mannan-binding lectin Associated Serine Protease) atau , dua buah zimogen protease. MASP-I dan MASP-II sangat mirip dengan protein C1r dan C1s pada lintasan komplemen klasik dan dianggap mempunyai prekursor yang sejenis. Ketika gugus reseptor karbohidrat pada MBL mengikat residu mannosa tertentu pada membran fosfolipid dari patogen, MASP-I dan MASP-II teraktivasi dan membelah protein komplemen C4 dan C2 menjadi C4a, C4b, C2a, C2b. C4b dan C2a saling mengikat pada permukaan patogen, membentuk , sedangkan masing-masing C4a dan C2b bertindak sebagai kemokina. C3 konvertase akan terpotong menjadi C3b yang kemudian mengikat reseptor komplemen yang terdapat pada fagosit. (in)
  • A via da lectina é um tipo de reação em cascata no sistema complemento, com estrutura semelhante à via clássica do complemento, a qual, após ativação, envolve ação de C4 e C2 para produzir proteínas ativas do complemento à jusante na cascata. Em contraste com a via clássica, a via da lectina não reconhece um anticorpo ligado ao alvo, mas sim começa com a ligação de lectinas ligadoras de manose ou ficolinas a certos açúcares. Nessa via, a lectina ligadora de manose (MBL) se liga a manose, glicose ou outros açúcares com os grupos 3- e 4-OH localizados no plano equatorial nas posições terminais de carboidratos ou glicoproteínas encontradas em microorganismos. Entre os alvos da MBL encontram-se, por exemplo, bactérias como Salmonella, Listeria e Neisseria, fungos patogênicos como Candida albicans e Cryptococcus neoformans e até alguns vírus como HIV-1 e o Vírus sincicial respiratório (RSV). A lectina ligadora de manose (MBL, também conhecida como proteína ligadora de manose) é uma proteína que pertence à família das colectinas que é produzida no fígado e é capaz de iniciar a cascata do complemento ligando-se a superfícies patógenos. (pt)
  • Лекти́новый путь актива́ции систе́мы комплеме́нта — один из трёх путей активации системы комплемента, наряду с альтернативным путём и классическим путём. Как и альтернативный путь, лектиновый путь системы комплемента не требует участия антител, поэтому его (наряду с альтернативным) относят к гуморальным механизмам врождённого иммунитета (а классический путь, для активации которого необходимы комплексы антиген—антитело, относят к гуморальным механизмам приобретённого иммунитета). Лектиновый путь был признан третьим возможным путём активации системы комплемента в 1990-х годах. (ru)
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  • Лекти́новый путь актива́ции систе́мы комплеме́нта — один из трёх путей активации системы комплемента, наряду с альтернативным путём и классическим путём. Как и альтернативный путь, лектиновый путь системы комплемента не требует участия антител, поэтому его (наряду с альтернативным) относят к гуморальным механизмам врождённого иммунитета (а классический путь, для активации которого необходимы комплексы антиген—антитело, относят к гуморальным механизмам приобретённого иммунитета). Лектиновый путь был признан третьим возможным путём активации системы комплемента в 1990-х годах. (ru)
  • The lectin pathway or lectin complement pathway is a type of cascade reaction in the complement system, similar in structure to the classical complement pathway, in that, after activation, it proceeds through the action of C4 and C2 to produce activated complement proteins further down the cascade. In contrast to the classical complement pathway, the lectin pathway does not recognize an antibody bound to its target. The lectin pathway starts with mannose-binding lectin (MBL) or ficolin binding to certain sugars. (en)
  • Lintasan MBL (bahasa Inggris: mannan-binding lectin pathway, Ali/Krueger pathway) adalah lintasan pada sistem komplemen yang menggunakan protein serupa dengan C1q seperti pada , yang mengikat senyawa mannos yang tampak pada karbohidrat pada permukaan bakteri maupun virus. Ikatan yang terjadi antara lektin, protein dari golongan yang diproduksi oleh hati, dengan mannosa merupakan . Kompleks protein MBL, lebih lanjut membentuk ikatan kompleks menjadi (bahasa Inggris: Mannan-binding lectin Associated Serine Protease) atau , dua buah zimogen protease. (in)
  • A via da lectina é um tipo de reação em cascata no sistema complemento, com estrutura semelhante à via clássica do complemento, a qual, após ativação, envolve ação de C4 e C2 para produzir proteínas ativas do complemento à jusante na cascata. Em contraste com a via clássica, a via da lectina não reconhece um anticorpo ligado ao alvo, mas sim começa com a ligação de lectinas ligadoras de manose ou ficolinas a certos açúcares. (pt)
rdfs:label
  • Lintasan MBL (in)
  • Lectin pathway (en)
  • Via da lectina (pt)
  • Лектиновый путь активации системы комплемента (ru)
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