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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 35, Number 10
BKCSDE 35(10)
October 20, 2014 
 
Title
 Human ChlR1 Stimulates Endonuclease Activity of hFen1 Independently of ATPase Activity
Author
 Do-Hyung Kim, Jeong-Hoon Kim, Byoung Chul Park, Do Hee Lee, Sayeon Cho*, Sung Goo Park*,
Keywords
 ChlR1, Dna2, Fen1, Okazaki fragment processing
Abstract
 Human ChlR1 protein (hChlR1), a member of the cohesion establishment factor family, plays an important role in the segregation of sister chromatids for maintenance of genome integrity. We previously reported that hChlR1 interacts with hFen1 and stimulates its nuclease activity on the flap-structured DNA substrate covered with RPA. To elucidate the relationship between hChlR1 and Okazaki fragment processing, the effect of hChlR1 on in vitro nuclease activities of hFen1 and hDna2 was examined. Independent of ATPase activity, hChlR1 stimulated endonuclease activity of hFen1 but not that of hDna2. Our findings suggest that the acceleration of Okazaki fragment processing near cohesions may aid in reducing the size of the replication machinery, thereby facilitating its entry through the cohesin ring.
Page
 3005 - 3008
Full Text
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