Nuclease sensitivity of postreplicated chromatin from Ehrlich ascites tumour cells. 1981

B L Miki, and J J Heikkila, and I R Brown

Chromatin appears to undergo structural modification after replication and before integration into bulk chromatin. In ascites cells, postreplicated chromatin displays a transient resistance to digestion with micrococcal nuclease. This resistance may be correlated with a shorter DNA repeat length (178 base pairs) than that found in bulk chromatin (187 base pairs). Selective labelling or selective digestion of DNA sequence classes could not account for these observations. In both bulk and postreplicated chromatin, three electrophoretic types of mononucleosomes were found. Postreplicated mononucleosome types showed selective sensitivities to nuclease digestion whereas bulk mononucleosome types did not.

UI MeSH Term Description Entries
D008836 Micrococcal Nuclease An enzyme that catalyzes the endonucleolytic cleavage to 3'-phosphomononucleotide and 3'-phospholigonucleotide end-products. It can cause hydrolysis of double- or single-stranded DNA or RNA. (From Enzyme Nomenclature, 1992) EC 3.1.31.1. Staphylococcal Nuclease,TNase,Thermonuclease,Thermostable Nuclease,Nuclease, Micrococcal,Nuclease, Staphylococcal,Nuclease, Thermostable
D009693 Nucleic Acid Hybridization Widely used technique which exploits the ability of complementary sequences in single-stranded DNAs or RNAs to pair with each other to form a double helix. Hybridization can take place between two complimentary DNA sequences, between a single-stranded DNA and a complementary RNA, or between two RNA sequences. The technique is used to detect and isolate specific sequences, measure homology, or define other characteristics of one or both strands. (Kendrew, Encyclopedia of Molecular Biology, 1994, p503) Genomic Hybridization,Acid Hybridization, Nucleic,Acid Hybridizations, Nucleic,Genomic Hybridizations,Hybridization, Genomic,Hybridization, Nucleic Acid,Hybridizations, Genomic,Hybridizations, Nucleic Acid,Nucleic Acid Hybridizations
D009707 Nucleosomes The repeating structural units of chromatin, each consisting of approximately 200 base pairs of DNA wound around a protein core. This core is composed of the histones H2A, H2B, H3, and H4. Dinucleosomes,Polynucleosomes,Dinucleosome,Nucleosome,Polynucleosome
D012091 Repetitive Sequences, Nucleic Acid Sequences of DNA or RNA that occur in multiple copies. There are several types: INTERSPERSED REPETITIVE SEQUENCES are copies of transposable elements (DNA TRANSPOSABLE ELEMENTS or RETROELEMENTS) dispersed throughout the genome. TERMINAL REPEAT SEQUENCES flank both ends of another sequence, for example, the long terminal repeats (LTRs) on RETROVIRUSES. Variations may be direct repeats, those occurring in the same direction, or inverted repeats, those opposite to each other in direction. TANDEM REPEAT SEQUENCES are copies which lie adjacent to each other, direct or inverted (INVERTED REPEAT SEQUENCES). DNA Repetitious Region,Direct Repeat,Genes, Selfish,Nucleic Acid Repetitive Sequences,Repetitive Region,Selfish DNA,Selfish Genes,DNA, Selfish,Repetitious Region, DNA,Repetitive Sequence,DNA Repetitious Regions,DNAs, Selfish,Direct Repeats,Gene, Selfish,Repeat, Direct,Repeats, Direct,Repetitious Regions, DNA,Repetitive Regions,Repetitive Sequences,Selfish DNAs,Selfish Gene
D002286 Carcinoma, Ehrlich Tumor A transplantable, poorly differentiated malignant tumor which appeared originally as a spontaneous breast carcinoma in a mouse. It grows in both solid and ascitic forms. Ehrlich Ascites Tumor,Ascites Tumor, Ehrlich,Ehrlich Tumor Carcinoma,Tumor, Ehrlich Ascites
D002843 Chromatin The material of CHROMOSOMES. It is a complex of DNA; HISTONES; and nonhistone proteins (CHROMOSOMAL PROTEINS, NON-HISTONE) found within the nucleus of a cell. Chromatins
D004261 DNA Replication The process by which a DNA molecule is duplicated. Autonomous Replication,Replication, Autonomous,Autonomous Replications,DNA Replications,Replication, DNA,Replications, Autonomous,Replications, DNA
D004273 DNA, Neoplasm DNA present in neoplastic tissue. Neoplasm DNA
D004351 Drug Resistance Diminished or failed response of an organism, disease or tissue to the intended effectiveness of a chemical or drug. It should be differentiated from DRUG TOLERANCE which is the progressive diminution of the susceptibility of a human or animal to the effects of a drug, as a result of continued administration. Resistance, Drug
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia

Related Publications

B L Miki, and J J Heikkila, and I R Brown
June 1980, Nature,
B L Miki, and J J Heikkila, and I R Brown
January 1982, Bulletin du cancer,
B L Miki, and J J Heikkila, and I R Brown
January 1965, Acta physiologica Academiae Scientiarum Hungaricae,
B L Miki, and J J Heikkila, and I R Brown
May 1979, Biochemical and biophysical research communications,
B L Miki, and J J Heikkila, and I R Brown
August 1955, Nature,
B L Miki, and J J Heikkila, and I R Brown
January 1968, The Biochemical journal,
B L Miki, and J J Heikkila, and I R Brown
September 1977, Biochimica et biophysica acta,
B L Miki, and J J Heikkila, and I R Brown
February 1966, The Japanese journal of experimental medicine,
B L Miki, and J J Heikkila, and I R Brown
January 1969, Enzymologia,
Copied contents to your clipboard!