BMP 신호 하부 인자인 PV.1 단백질의 결합 단백질 동정 = Screening of Interacting Proteins with PV.1 as Downstream Factors of BMP Signal

국문 초록 (Abstract)

척추동물에서 BMP의 배(ventral)쪽 신호 전달 경로의 하위에 있는 전사조절인자들은 등배(dorsalventral)쪽 축을 따라 형성되는 중배엽에 있어서도 그 기능을 공유 한다는 것이 보고 되었다. 본 연구에서는 BMP 신호 물질의 하위 유전자인 PV.1 단백질이 배쪽과 등쪽에서의 신호전달에 있어서 차별적 기능을 알기 위하여 PV.1과 상호 결합하는 단백질을 검색하였다. 효모 이중 접합법을 이용하여 24개의 PV.1 결합 단백질을 검색하였고, 이중 결합하는 Xvent-2와 Xclaudin-6에 대한 PV.1 단백질의 도메인(domain) 연구를 하였다. PV.1 단백질의 C-terminus인 197-241 지역이 Xclaudin-6와 결합하는 반면에 Xvent-2는 PV.1 단백질의 C-terminus 전반에서 결합한다는 것을 확인하였다. 또한 PV.1과 결합하는 Xvent-2는 동형 이중 결합(Homodimerization)뿐만 아니라 PV.1과 결합하는 Xclaudin-6과도 이형 이중 결합(Heteodimerization)을 한다는 것을 확인하였다.

다국어 초록 (Multilingual Abstract)

Homeodomain transcription factors functioning downstream of BMP ventral pathway have been reported to share similar domain of roles in mesoderm patterning along the dorsal-ventral axis. To elucidate the differential role of PV.1 in the aspect of relationship between dorsal and ventral region, we tried to screen PV.1-
interacting proteins. Twenty-four PV.1-interacting proteins were identified by yeast two-hybrid screening. Xvent-2 and Xclaudin-6 among these, went under domain study. The C-terminus of PV.1, more specifically 197-241 region was found to interact with Xclaudin-6. Meanwhile Xvent-2 has mild affinity to overall C-terminal region of PV.1. At the same time it was found that Xvent-2 homodimerizes and also binds to Xclaudin-6.

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