The development of expression systems for heterologous proteins has been greatly demanded not only for the study of the structure/function relationships of these proteins but also for their biotechnological and pharmaceutical applications. During the past decades, the methylotrophic yeast Hansenula polymorpha and Pichia pastoris have drawn attention as one of promising hosts for the production of a variety of heterologous proteins. The increasing popularity of H. polymorpha and P. pastoris as the host systems can be attributed to the several advantages over the traditional yeast Saccharomyces cerevisiae, such as the availability of very strong and tightly regulated promoters from the enzymes involved in the metabolism of methanol, a very high-cell density even on simple mineral media, and a high stability of expression plasmids. Furthermore, it has been observed that glycoproteins from these two yeasts are less hyperglycosylated compared to those from S. cerevisiae. Despite substantial similarities as methylotrophic yeasts, however, these two expression systems have some unique features distinguished from each other. In this paper we present a brief overview on the present status of the expression systems developed in methylotrophic yeasts, mainly focusing on the similarities and differences between the H. polymorpha and P. pastoris systems.
목차
Abstract 서론 메탄올 대사 및 조절(Methanol metabolism and regulation) 분자 유전학적 조작(Molecular genetic manipulation) 발현 벡터(Expression vectors) 프로모터(Promoters) 선별표지(Selectable markers) 삽입 카피 수 조절 시스템(Copy-number controlled integrationsystem) 숙주 균주(Host strains) 메탄올 소모 형질(Methanol utilization phenotype) 단백질 분해효소 결손 균주(Protease-deficient strains) 단백질 합성 후 수식(Post-translational modification) 분비 신호 서열(Secretion signal sequence) 당화과정(Glycosylation) 퍼옥시솜 타겟팅(Sorting of heterologous proteins toperoxisome) 고농도 배양(High cell density growth) 결론 REFERENCES
키워드
Hansenula polymorphaPichia pastorisheterologous protein production
저자
강현아 [ Hyun Ah Kang | 생명공학연구소 미생물공정 연구실 ]
이상기 [ Sang Ki Rhe | 생명공학연구소 미생물공정 연구실 ]
Corresponding author
한국생물공학회 [The Korean Society for Biotechnology and Bioengineering]
설립연도
1984
분야
공학>생물공학
소개
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