38kDa의 중합효소 델타 상호작용 단백질(PDIP38) 로도 알려진 중합효소 델타 상호작용 단백질 2 는 [5] [6] 인간 의 POLDIP2 유전자 에 의해 암호화된다.
이 유전자는 DNA 중합효소 델타 p50 서브유닛과 상호작용하는 단백질을 암호화한다. 암호화된 단백질은 또한 증식하는 세포 핵항원과 상호작용한다. 이 유전자의 일부 전사물은 종양괴사인자 알파유도단백질1(TNFAIP1)[6] POLDIP2 / PDIP38은 핵과 미토콘드리아 양쪽에서 확인된 달빛 단백질이다
상호 작용 핵에서 POLDIP2는 PCNA 와 [5] 것 으로 나타난 반면, 미토콘드리아 DNA 핵이드를 구성하는 단백질 및 AAA+ 단백질분해효소 CLPXP 와 상호작용하여 이 단백질 분해 기계의 특이성과 안정성을 모두 조절하는 것으로 나타났다.
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