scholarly journals Разработка кандидатной субстанции рекомбинантного белка CRM197

2016 ◽  
Vol 15 (1) ◽  
pp. 93-98
Author(s):  
E. G. Bogomolova ◽  
O. A. Dobrovol'skaya ◽  
A. A. Mirovskaya ◽  
R. I. Al-Shehadat ◽  
E. A. Fedorova ◽  
...  

CRM197 is a non-toxic mutant of diphtheria toxin having a single amino acid substitution of a glycine for a glutamic acid in position 52. Being naturally nontoxic, CRM197 is a promising adjuvant and ideal carrier protein for conjugate vaccines. Typically, production of diphtheria toxic and non-toxic mutants are carried out in Corynebacterium diphtheria. Production of recombinant CRM197 in Escherichia coli is advantageous. It is simple, cheap and permits production of the target protein in a short time using a non-pathogenic microorganism. In this study the pharmacology grade substance of recombinant protein CRM197 was developed based on chemical properties of the protein. The substance of recombinant protein CRM197 is characterized by presence of 0.054 ng/mcg of CRM197 E. coli host cell protein, 1.26 pg/mcg of CRM197 E.coli Host Cell DNA and less than 0,078 EU endotoxins per 1 mg of recombinant protein CRM197.

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Nicholas M. Negretti ◽  
Christopher R. Gourley ◽  
Prabhat K. Talukdar ◽  
Geremy Clair ◽  
Courtney M. Klappenbach ◽  
...  

AbstractCampylobacter jejuni is a foodborne pathogen that binds to and invades the epithelial cells lining the human intestinal tract. Maximal invasion of host cells by C. jejuni requires cell binding as well as delivery of the Cia proteins (Campylobacter invasion antigens) to the host cell cytosol via the flagellum. Here, we show that CiaD binds to the host cell protein IQGAP1 (a Ras GTPase-activating-like protein), thus displacing RacGAP1 from the IQGAP1 complex. This, in turn, leads to the unconstrained activity of the small GTPase Rac1, which is known to have roles in actin reorganization and internalization of C. jejuni. Our results represent the identification of a host cell protein targeted by a flagellar secreted effector protein and demonstrate that C. jejuni-stimulated Rac signaling is dependent on IQGAP1.


2016 ◽  
Vol 18 (6) ◽  
pp. 1439-1452 ◽  
Author(s):  
Vibha Jawa ◽  
Marisa K. Joubert ◽  
Qingchun Zhang ◽  
Meghana Deshpande ◽  
Suminda Hapuarachchi ◽  
...  

2015 ◽  
Vol 9 (S9) ◽  
Author(s):  
Nadine Kochanowski ◽  
Gaetan Siriez ◽  
Larissa Mukankurayija ◽  
Aurélie Delangle ◽  
Alex Murray-Smith ◽  
...  

Biologicals ◽  
2018 ◽  
Vol 52 ◽  
pp. 59-66 ◽  
Author(s):  
Sabine Johnson ◽  
Jun X. Wheeler ◽  
Robin Thorpe ◽  
Mary Collins ◽  
Yasuhiro Takeuchi ◽  
...  

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