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Interaction of HIV-1 ribonuclease H with polypurine tract containing RNA-DNA hybrids

Title data

Wöhrl, Birgitta ; Moelling, Karin:
Interaction of HIV-1 ribonuclease H with polypurine tract containing RNA-DNA hybrids.
In: Biochemistry. Vol. 29 (1990) Issue 44 . - pp. 10141-10147.
ISSN 1520-4995
DOI: https://doi.org/10.1021/bi00496a001

Abstract in another language

The mode of action of the RNase H activity from HIV-1 was analyzed with a purified recombinant p66/p51 reverse transcriptase RT/RNase H protein and RNA-DNA hybrid consisting of RNA harboring the polypurine tract (ppt) and three complementary synthetic DNA oligonucleotides. Upon incubation of this preformed RNA-DNA hybrid with the p66/p51 RT/RNase H, a cleavage pattern is observed that indicates endonucleolytic RNase H activity with some sequence specificity for the next to last nucleotide of the 3'-end of the ppt RNA and one cut within the ppt. The RNase H avoids cleavage of G or A stretches. During RNA-directed DNA synthesis the RNA is hydrolyzed in a concerted action of RT and RNase H whereby the RNase H exhibits endonuclease as well as 3'-5'-exonuclease activity. The distance between the active centers of the RT and RNase H corresponds to 18 base pairs of the RNA-DNA hybrid. Plus-strand DNA-directed DNA synthesis initiates exactly at the next to last nucleotide of the 3'-end of the ppt RNA by means of the RNase H activity.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Biopolymers
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Biopolymers > Lehrstuhl Biopolymere - Apl. Prof. Dr. Birgitta Wöhrl
Faculties
Result of work at the UBT: No
DDC Subjects: 500 Science > 540 Chemistry
500 Science > 570 Life sciences, biology
Date Deposited: 20 May 2019 12:52
Last Modified: 20 May 2019 12:52
URI: https://eref.uni-bayreuth.de/id/eprint/49014