SERAP YALÇIN AZARKAN
(Ahi Evran Üniversitesi, Mühendislik-Mimarlık Fakültesi, Gıda Mühendisliği Bölümü, Kırşehir, Türkiye)
Yıl: 2012Cilt: 69Sayı: 3ISSN: 0377-9777 / 1308-2523Sayfa Aralığı: 169 - 178Türkçe

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Mikrosistin Biyosentez Yolaklarının Düzenlenmesi and Genetik Mekanizmalar
Oksijenik fotosentetik bakteriler grubunda yer alan, sucul ve karasal çevrede çok yaygın bir yaşam alanı bulunan siyanobakteriler (Mavi-yeşil alg) farklı morfolojik yapıya sahiptirler. Siyanobakteriler, bir kısmı oldukça etkili toksin olan ribozomal olmayan peptidler, poliketidler ve alkoloidleri içeren biyoaktif sekonder metabolit üretebilmektedirler. Toksik siyanobakterilerin yaygın bir şekilde bulunması insan ve hayvan sağlığı için risk oluşturmaktadır. Siyanobakterial toksinler veya siyanotoksinler insanlarda karaciğer kanseri, dermal kontakt irritasyonlar, gastroenterit gibi hastalıklara sebep olmaktadır. Siyanotoksinler nörotoksinler,hepatotoksinler, sitotoksinler ve dermatotoksinler olmak üzere dört ana sınıfa ayrılırlar. Fakat yapısal olarak birbirlerinden oldukça farklıdırlar. Geçtiğimiz on yıl içerisinde dört temel siyanotoksinin: mikrosistin, nodularin, saksitoksin ve silindrospermopsin biyosentez yolakları biyokimyasal ve genetik olarak tanımlanmıştır. Mikrosistinlerin, insan ve hayvan intoksikasyonlarını içeren birçok vakadan sorumlu olduğu gösterilmiştir. Bu derleme ile mikrosistinin biyosentez yolaklarını, kimyasal, genetik ve toksikolojik özelliklerin açıklanmaya çalışılmıştır.
Fen > Temel Bilimler > Biyoloji
DergiDerlemeErişime Açık
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