Korean Journal of Microbiology (미생물학회지)

The Microbiological Society of Korea (한국미생물학회)
권호 표지

Subcellular Localization of Novel Stress Protein VISP

새로운 스트레스 단백질인 VISP의 세포내 위치

  • Moon, Chang-Hoon (Department of Biological Sciences, University of Ulsan) ;
  • Yoon, Won-Joon (Department of Biological Sciences, University of Ulsan) ;
  • Ko, Myoung-Seok (Department of Biological Sciences, University of Ulsan) ;
  • Kim, Hyun-Ju (Division of Molecular and Life Sciences, Pohang University of Science and Technology (POSTECH)) ;
  • Park, Jeong-Woo (Department of Biological Sciences, University of Ulsan)
  • 문창훈 (울산대학교 생명과학부) ;
  • 윤원준 (울산대학교 생명과학부) ;
  • 고명석 (울산대학교 생명과학부) ;
  • 김현주 (포항공과대학 생명과학과) ;
  • 박정우 (울산대학교 생명과학부)
  • Published : 2006.12.30
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Abstract

Previously we demonstrated that virus-inducible stress protein (VISP) is induced in fish cells by the infection of a fish rhabdovirus. In this paper, we investigated the subcellular localization of the VISP and determined the region of VISP responsible for the subcellular localization. The CHSE-214 cells were stained with monoclonal antibody raised against VISP and observed with confocal microscope to detect the endogenous VISP. The results showed that the VISP localizes to the perinuclear region as spots. A plasmid expressing VISP fused to enhanced green fluorescent protein (EGFP) was constructed. The transient expression of full-length VISP fused to EGFP in CHSE-214 cells confirmed the spot formation of the VISP at perinuclear region. To determine the region responsible for the perinuclear localization of the VISP, we constructed a series of deletion mutants and, by using these deletion mutants, we found that C-terminal region of the VISP (aa 612-710) is essential for the perinuclear distribution of VISP and that this region contained nuclear receptor binding motif (691-TLTSLLL-697). Our results suggest that VISP localizes to the perinuclear region and C-terminal regions are important for this localization. Further studies on the role of the perinuclear localization of VISP in IHNV growth mali reveal the novel mechanism of IHNV pathogenecity.

이전의 연구 결과 어류 rhabdovirus에 감염된 세포에서 virus-inducible stress protein (VISP)의 발현이 증가함을 확인하였다. 본 연구에서는 VISP의 세포내 위치를 확인하였으며, 또한 세포내 위치 결정에 중요한 역할을 담당하는 VISP의 부위를 확인하였다. 먼저 endogenous VISP의 세포내 위치를 확인하기 위하여 CHSE-214 세포를 VISP에 대한 단클론항체를 사용하여 염색한 후 confocal microscope로 관찰하였다. 그 결과 VISP가 세포의 핵 주변에 점구조를 형성함이 확인되었다. 이를 확인하기 위하여 VISP에 enhanced green fluorescent protein (EGFP)이 붙은 fusion gene을 발현하는 plasmid를 제조하였다. EGFP-VISP를 발현하는 plasmid 벡터를 세포에 transfection 시킨 후 confocal microscope로 관찰한 결과 핵 주변에 점구조를 형성함이 확인되었다. VISP의 아미노산서열 중 핵 주변의 점구조 형성에 관여하는 부분을 확인하기 위하여 VISP의 다양한 deletion mutant들을 제조하였다. 이 mutant를 사용한 transfection 실험 결과 VISP의 C-terminal 부위(aa 612-710)가 핵주변의 점구조 형성에 중요한 역할을 담당함이 확인되었으며, 이 부분의 functional motif 분석결과 691-TLTSLLL-697 부위에 nuclear receptor binding motif가 존재함이 확인되었다. 이와 같은 결과들을 종합하면, VISP는 핵 주변에 존재하며 VISP의 C-terminal부위가 혀 주위 분포에 중요한 역할을 담당함을 알 수 있었다. 이후의 연구로부터 VISP의 핵 주위 분포가 IHNV의 성장에 미치는 영향이 확인되면 IHNV 병원성의 새로운 기작을 밝혀내는 중요한 자료가 될 것이다.

Keywords

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