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  • 02월 26일 17시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제115회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Structural study on the Plk4 complexes reveals the molecular basis for scaffold switching in centriole duplication

등록일
2015년 2월 12일 15시 13분 37초
접수번호
0988
발표코드
BIO.O-4 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
금 11시 : 35분
발표형식
구두발표
발표분야
생명화학 - Oral Presentation of Young Biochemists
저자 및
공동저자
구본수, 김승준1,*
한국생명공학연구원(KRIBB) 기능유전체연구센터, Korea
1한국생명공학연구원 단백체시스템, Korea
Polo-like kinases (Plks) are serine/threonine kinases that regulate cell cycle, which commonly contain a canonical catalytic domain and a unique polo-box domain. Polo-like kinase 4 (Plk4) is a master regulator of centriole duplication, whose proper recruitment to centriole is critical for maintaining genomic integrity. The cryptic polo-box domain (CPB) of Plk4 is necessary for the protein function by interacting with the centriolar receptors including Cep152 and Cep192. We found the assembly of Cep152 around the Cep192-encircled daughter centriole and the relocalization of Plk4 from the inner Cep192 ring to the outer Cep152 ring during cell cycle. Crystal structures of the CPB of Plk4 alone and in complex with Cep192- and Cep152-derived fragments revealed that the fragements bind to Plk4 in an opposite orientations and mutually exclusively. Together with the higher binding affinity of Cep152 over Cep192 to Plk4, it accounts for the effective ‘snatching’ of Plk4 from the preformed Plk4-Cep192 complex to the Plk4-Cep152 complex. These results demonstrate that Plk4 is regulated in time and space through ordered interactions of its CPB with two scaffold proteins, Cep192 and Cep152.

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