Biomaterial Database

An endodeoxyribonuclease activity in nuclei from rat-ascites hepatoma. 1985

Y Hibino, and N Sugano

The DNA in nuclei from rat-ascites hepatoma (AH) was rather resistant to endogenous endonucleolytic attack (autodigestion), compared with that in nuclei from normal rat liver (RL). In contrast, by micrococcal nuclease, the DNA in AH nuclei was cleaved in the same manner as in RL nuclei. A 0.6 M NaCl extract was prepared from RL or AH nuclei and subjected to Sephadex G-100 filtration. The resulting-nuclease fraction was separated further into two nuclease fractions, I and II, by CM-Sephadex column chromatography. The activity ratio of II to I was 7.1 for the RL and 2.0 for the AH nuclei. Moreover, the activity of fraction II from the AH nuclei was rather low, compared with that from the RL nuclei. Regenerating-liver nuclei from the normal rat were also assayed in the same way. The results obtained were very similar to those from the AH nuclei. In addition, each of fractions, I and II, cleaved pBR322 DNA of superhelical form; in other words, each had endonucleolytic ability.

UI	MeSH Term	Description	Entries
D008099	Liver	A large lobed glandular organ in the abdomen of vertebrates that is responsible for detoxification, metabolism, synthesis and storage of various substances.	Livers
D008114	Liver Neoplasms, Experimental	Experimentally induced tumors of the LIVER.	Hepatoma, Experimental,Hepatoma, Morris,Hepatoma, Novikoff,Experimental Hepatoma,Experimental Hepatomas,Experimental Liver Neoplasms,Hepatomas, Experimental,Neoplasms, Experimental Liver,Experimental Liver Neoplasm,Liver Neoplasm, Experimental,Morris Hepatoma,Novikoff Hepatoma
D008115	Liver Regeneration	Repair or renewal of hepatic tissue.	Liver Regenerations,Regeneration, Liver,Regenerations, Liver
D002467	Cell Nucleus	Within a eukaryotic cell, a membrane-limited body which contains chromosomes and one or more nucleoli (CELL NUCLEOLUS). The nuclear membrane consists of a double unit-type membrane which is perforated by a number of pores; the outermost membrane is continuous with the ENDOPLASMIC RETICULUM. A cell may contain more than one nucleus. (From Singleton & Sainsbury, Dictionary of Microbiology and Molecular Biology, 2d ed)	Cell Nuclei,Nuclei, Cell,Nucleus, Cell
D004247	DNA	A deoxyribonucleotide polymer that is the primary genetic material of all cells. Eukaryotic and prokaryotic organisms normally contain DNA in a double-stranded state, yet several important biological processes transiently involve single-stranded regions. DNA, which consists of a polysugar-phosphate backbone possessing projections of purines (adenine and guanine) and pyrimidines (thymine and cytosine), forms a double helix that is held together by hydrogen bonds between these purines and pyrimidines (adenine to thymine and guanine to cytosine).	DNA, Double-Stranded,Deoxyribonucleic Acid,ds-DNA,DNA, Double Stranded,Double-Stranded DNA,ds DNA
D004706	Endodeoxyribonucleases	A group of enzymes catalyzing the endonucleolytic cleavage of DNA. They include members of EC 3.1.21.-, EC 3.1.22.-, EC 3.1.23.- (DNA RESTRICTION ENZYMES), EC 3.1.24.- (DNA RESTRICTION ENZYMES), and EC 3.1.25.-.
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
D051381	Rats	The common name for the genus Rattus.	Rattus,Rats, Laboratory,Rats, Norway,Rattus norvegicus,Laboratory Rat,Laboratory Rats,Norway Rat,Norway Rats,Rat,Rat, Laboratory,Rat, Norway,norvegicus, Rattus