TY - JOUR
T1 - Ribonucleotides in closed circular mitochondrial DNA from HeLa cells
AU - Wong-Staal, F.
AU - Mendelsohn, J.
AU - Goulian, M.
N1 - Funding Information:
Service Grants Grant NP-102A.
Copyright:
Copyright 2014 Elsevier B.V., All rights reserved.
PY - 1973/7/2
Y1 - 1973/7/2
N2 - Closed circular mitochondrial DNA from HeLa cells is sensitive to both alkali and ribonucleases. The kinetics of ring opening in alkali suggest at least two classes of molecules. One class undergoes rapid breakdown, ultimately to fragments smaller than unit length, in contrast to the second class, which is more resistant to alkaline cleavage and is converted in large part to unit length single strands. Ribonucleases A, T1 and H relax the supercoiled molecules, indicating that the alkali susceptibility is due to the presence of ribonucleotides in the DNA. By comparison with the rate of hydrolysis of RNA, the alkali-resistant class of mitochondrial DNA molecules is estimated to contain approximately 3 ribonucleotides and the alkalisensitive class 10-18.
AB - Closed circular mitochondrial DNA from HeLa cells is sensitive to both alkali and ribonucleases. The kinetics of ring opening in alkali suggest at least two classes of molecules. One class undergoes rapid breakdown, ultimately to fragments smaller than unit length, in contrast to the second class, which is more resistant to alkaline cleavage and is converted in large part to unit length single strands. Ribonucleases A, T1 and H relax the supercoiled molecules, indicating that the alkali susceptibility is due to the presence of ribonucleotides in the DNA. By comparison with the rate of hydrolysis of RNA, the alkali-resistant class of mitochondrial DNA molecules is estimated to contain approximately 3 ribonucleotides and the alkalisensitive class 10-18.
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U2 - 10.1016/0006-291X(73)91412-5
DO - 10.1016/0006-291X(73)91412-5
M3 - Article
C2 - 4582369
AN - SCOPUS:0015859243
SN - 0006-291X
VL - 53
SP - 140
EP - 148
JO - Biochemical and biophysical research communications
JF - Biochemical and biophysical research communications
IS - 1
ER -