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NTIS 바로가기생명과학회지 = Journal of life science, v.24 no.8 = no.172, 2014년, pp.915 - 926
최은실 (부산대학교 생명시스템학과) , 황지환 (부산대학교 생명시스템학과)
The ribosome is a protein synthesizing machinery and a ribonucleoprotein complex that consists of three ribosomal RNAs (23S, 16S and 5S) and 54 ribosomal proteins in bacteria. In the course of ribosome assembly, ribosomal proteins (r-protein) and rRNAs are modified, the r-proteins bind to rRNAs to f...
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핵심어 | 질문 | 논문에서 추출한 답변 |
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원핵세포의 리보솜은 어떻게 구성되어 있나? | 리보솜은 리보솜 단백질(ribosomal protein)들과 리보솜 RNA (ribosomal RNA; rRNA)들로 이루어진 리보핵산단백질 복합체로, 전령 RNA (messenger RNA; mRNA)상의 정보를 단백질로 번역하는 단계에 중심적인 역할을 한다. 원핵세포의 리보솜은 70S 입자로 이루어져 있으며, 이는 30S 리보솜 소단위체(small ribosomal subunit)와 50S 리보솜 소단위체(large ribosomal subunit)로 구성되어있다. 30S 리보솜 소단위체는 16S rRNA (1,542 nt)와 21개의 리보솜 단백질로 이루어져 있으며, 번역과정에서 mRNA와 결합하여 mRNA상의 유전정보를 해독하는 기능을 가진다. | |
리보솜이란 무엇인가? | 리보솜은 mRNA상의 유전정보를 단백질로 번역하는 세포에 필수적인 거대복합체이다. 이러한 리보솜은 리보 핵산단백질 복합체로, rRNA와 리보솜 단백질로 이루어져있다. | |
PTC에서 촉매부위가 리보솜 단백질이 아닌, rRNA에 위치하는 것이 의미하는 것은? | 70S 리보솜의 결정구조를 관찰해 보면, PTC에서 촉매부위는 리보솜 단백질이 아닌 rRNA에 위치한다는 것이 보고되어 있다[82]. 이는 리보솜이 사실상 리보자임(ribozyme)에 속하며, 리보솜의 기능에 있어서 RNA가 중심적인 역할을 한다는 것을 나타낸다. |
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