R Karwan
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Explore the profile of R Karwan including associated specialties, affiliations and a list of published articles.
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12
Citations
159
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Recent Articles
1.
Rossmanith W, Tullo A, Potuschak T, Karwan R, Sbisa E
J Biol Chem
. 1995 May;
270(21):12885-91.
PMID: 7759547
tRNA processing is a central event in mammalian mitochondrial gene expression. We have identified key enzymatic activities (ribonuclease P, precursor tRNA 3'-endonuclease, and ATP(CTP)-tRNA-specific nucleotidyltransferase) that are involved in HeLa...
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3.
Potuschak T, Rossmanith W, Karwan R
Nucleic Acids Res
. 1993 Jul;
21(14):3239-43.
PMID: 7688115
RNase MRP is a site-specific ribonucleoprotein endoribonuclease that processes RNA from the mammalian mitochondrial displacement loop containing region. RNase P is a site-specific ribonucleoprotein endoribonuclease that processes pre-tRNAs to generate...
4.
Rossmanith W, Karwan R
Mol Biol Rep
. 1993 Jun;
18(1):29-35.
PMID: 8232291
We show that the Th/To ribonucleoprotein is defined by (i) the co-immunoprecipitation of two RNAs, (ii) the co-immunoprecipitation of four major polypeptides and (iii) the quantitative immune recognition of both...
5.
Karwan R
FEBS Lett
. 1993 Mar;
319(1-2):1-4.
PMID: 7681014
RNase P and RNase MRP are related ribonucleoproteins. RNase MRP processes mitochondrial precursor- (primer) RNAs, whereas RNase P cleaves precursor-tRNAs to produce their mature 5'-ends. Both RNase P and RNase...
6.
Karwan R, Bennett J, Clayton D
Genes Dev
. 1991 Jul;
5(7):1264-76.
PMID: 2065976
RNase MRP is a site-specific endoribonuclease that processes primer RNA from the leading-strand origin of mammalian mitochondrial DNA replication. It is present in active form as isolated from the nucleus,...
7.
Karwan R
Eur J Biochem
. 1989 Feb;
179(3):549-55.
PMID: 2465894
We have isolated a 55-kDa enzyme from Saccharomyces cerevisiae on the basis of its ability to hydrolyze specifically the RNA moiety of RNA/DNA hybrids [RNase H(55)]. Remarkably, monospecific anti-[RNase H(55)]...
8.
Wintersberger U, Kuhne C, Karwan R
Biochim Biophys Acta
. 1988 Dec;
951(2-3):322-9.
PMID: 2462914
From the yeast, Saccharomyces cerevisiae, three proteins exhibiting ribonuclease H activity were isolated. These proteins differ in molecular weights and enzymatic properties. The two smaller ones, RNAase H(55) and RNAase...
9.
Karwan R, Wintersberger U
J Biol Chem
. 1988 Oct;
263(29):14970-7.
PMID: 3049596
Two ribonucleases H (RNases H) were purified to apparent homogeneity from the yeast Saccharomyces cerevisiae. The enzymes were separated from the previously described yeast ribonuclease H (RNase H(70), Karwan, R.,...
10.
Karwan R, Wintersberger U
FEBS Lett
. 1986 Oct;
206(2):189-92.
PMID: 2428664
A specific substrate, M13 DNA:RNA-[32P]DNA, was synthesized to investigate the mode of cleavage of enzymes with RNase H activity. RNase H(70) from Saccharomyces cerevisiae hydrolyzes the phosphodiester bond at the...