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NTIS 바로가기Korean journal of microbiology = 미생물학회지, v.54 no.1, 2018년, pp.1 - 8
박신애 (강원대학교 분자생명과학과) , 이정신 (강원대학교 분자생명과학과)
A prokaryotic cell has various histone-like proteins also known as nucleoid-associated proteins (NAPs). These proteins bind AT-rich sequence at DNA, which induce DNA wrapping, bending, and bridging, and subsequently regulate the gene expression in bacteria. Because NAPs function in transcriptional s...
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핵심어 | 질문 | 논문에서 추출한 답변 |
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원핵세포의 히스톤 유사 단백질은 어떤 역할을 하는가? | 원핵 세포는 핵양체 결합 단백질(NAP)로 알려진 다양한 히스톤 유사 단백질을 가지고 있다. 이들은 DNA의 AT-rich 서열에 결합하여, DNA 자체를 감싸거나, 구부리거나, 떨어져 있는 DNA 가닥을 연결시키는 다리 역할을 하여, 결국에는 원핵 생물의 유전자 발현을 조절한다. NAP는 특히 전사의 억제 기능을 가지고 있기 때문에, 유전자 발현 억제에 있어서 이들의 역할과, 구체적인 메커니즘을 밝히는 것을 매우 중요한 일이다. | |
살모넬라는 HGT로 얻어진 Salmonella pathogenicity island를 총 5개 가지고 있는데 그중 SP-1과 SP-2 유전자는 각각 어디에 필요한 유전자인가? | Salmonella는 HGT로 얻어진 Salmonella pathogenicity island (SPI)를 총 5개 가지고 있고, 현재까지 SPI-1, SPI-2 유전자와 H-NS와의 관계에 대한 연구들이 활발하게 진행되고 있다. 먼저 SPI-1 유전자들은 Salmonella가 장내 상피세포에 침투할 때에 필요한 유전자들이고, SPI-2 유전자들은 대식세포(macrophage) 내 생존과 증식에 필요하여 결국에는 최종적으로 systemic disease를 유발한다고 알려져 있는 유전자들이다(Ellermeier and Slauch, 2007; Fass and Groisman, 2009). SPI-1 유전자들의 전사 조절자(transcriptional regulator)로 알려진 HilD는 SPI-1 내에 존재하는 한 유전자의 생성물이다. | |
E. coli의 H-NS 구조에서 N-말단은 어떤 구조를 가지고 있고 무엇을 형성할 수 있는가? | E. coli의 H-NS 구조를 보았을 때, N-말단에 4개의 α–helix (α1, α2, α3, α4) 구조를 가지고 있고, 이 부분을 이용하여 다른 H-NS와 결합하여 올리고머화(oligomerization)를 할 수 있다. α1, α2, α3 도메인을 이용하여 head-to-head 결합, α3와 α4 도메인을 이용하여 tail-to-tail 결합을 할 수 있다(Esposito et al. |
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