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  • Journal of Experimental and Clinical Medicine
  • Volume:29 Issue:2
  • Endoplazmik retikulum stresi ve katlanmamış protein cevabı

Endoplazmik retikulum stresi ve katlanmamış protein cevabı

Authors : Aynur DÜZGÜN, Hasan ALAÇAM, Ali OKUYUCU
Pages : 95-100
Doi:10.5835/jecm.omu.29.02.003
View : 29 | Download : 12
Publication Date : 2012-02-23
Article Type : Other Papers
Abstract :Hücre içerisinde bir çok önemli görevi bulunan endoplazmik retikulumun insert ignore into journalissuearticles values(ER); bir diğer önemli görevi de protein katlanmasının sağlanmasıdır. ER’de protein katlanmasının gerçekleşmesini sağlayan glukoz düzenleyici protein 78, glukoz düzenleyici protein 94, lektin benzeri proteinler ve foldazlar bulunmaktadır. ER fonksiyon kapasitesini aşan fizyolojik veya patolojik durumlarda lümende katlanmamış ya da yanlış katlanmış protein birikimi meydana gelir ve bu durum ER stresi olarak isimlendirilmektedir. ER stresi hücre içerisinde oluştuktan sonra hücrenin hayati fonksiyonlarını devam ettirebilmek için katlanmamış protein cevabı insert ignore into journalissuearticles values(UPR); adı verilen sinyal yolakları devreye girmektedir. Protein kinaz RNA insert ignore into journalissuearticles values(PKR); benzeri ER kinaz insert ignore into journalissuearticles values(PERK);, aktive edici transkripsiyon faktörü insert ignore into journalissuearticles values(ATF6);, inozitol gerektiren kinaz 1 insert ignore into journalissuearticles values(IRE1); yolakları UPR sinyal yolaklarının başlıcalarıdır. Endoplasmic reticulum stress and unfolded protein response Another important function of the endoplasmic reticulum insert ignore into journalissuearticles values(ER);, which has many important tasks in the cell, is to ensure the protein folding. In ER, there are glucose regulated protein 78, glucose regulated protein 94, lectin like proteins and foldases, which enable the protein folding. In case of physiological and pathological situations that exceed the function capacity of ER, unfolded or misfolded protein accumulation occurs in lumen and this case is named as ER stress. After the ER stress occurs in the cell, the signal pathways named unfolded protein response insert ignore into journalissuearticles values(UPR); step in for the continuance of the vital functions of the cell. Major UPR signal pathways include protein kinase RNA insert ignore into journalissuearticles values(PKR); like ER kinase insert ignore into journalissuearticles values(PERK);, activating transcription factor 6 insert ignore into journalissuearticles values(ATF6);, j requiring kinase 1 insert ignore into journalissuearticles values(IRE1);. J. Exp. Clin. Med., 2012; 29:95-100
Keywords : Endoplazmik retikulum, Grp78, Grp94, PERK, ATF6, IRE Endoplasmic reticulum, Grp78, Grp94, PERK, ATF6, IRE1,

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