Ontology Term : Pfam:PF08615 Ribonuclease H2 non-catalytic subunit (Ylr154p-like) EMBL-EBI

Description  This entry represents the non-catalytic subunit of RNase H2, which in S. cerevisiae is Ylr154p/Rnh203p Swiss:Q12338 (. Whereas bacterial and archaeal RNases H2 are active as single polypeptides, the Saccharomyces cerevisiae homologue, Rnh2Ap, when expressed in Escherichia coli, fails to produce an active RNase H2. For RNase H2 activity three proteins are required [Rnh2Ap (Rnh201p), Ydr279p (Rnh202p) and Ylr154p (Rnh203p)]. Deletion of any one of the proteins or mutations in the catalytic site in Rnh2A leads to loss of RNase H2 activity [1]. RNase H2 ia an endonuclease that specifically degrades the RNA of RNA:DNA hybrids. It participates in DNA replication, possibly by mediating the removal of lagging-strand Okazaki fragment RNA primers during DNA replication.
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