Biomaterial Database

Effect of aphidicolin on DNA methyltransferase in the nucleus. 1998

I Suetake, and Y Kano, and S Tajima

Institute for Protein Research, Osaka University, Japan.

Methylation of cytosine in the genomic DNA plays an important role in mammalian embryogenesis. DNA methyltransferase activity, which contributes mainly to the maintenance of the methylation pattern during proliferation, is under the control of the cell cycle, its activity being higher in the S phase than in the other phases (Adams, R.L.P., 1990, Biochem. J. 265, 309-320). In the present study, we examined how DNA methyltransferase is regulated in the cells arrested at S phase by aphidicolin treatment. The activity and protein levels of DNA methyltransferase in the nuclei were kept constant in proliferating mouse erythroleukemia cells, and increased about twofold after 6 h incubation in the presence of aphidicolin. This increase of DNA methyltransferase levels by aphidicolin treatment was positively correlated with the cell population at S phase. De novo synthesis of DNA methyltransferase protein was increased by the treatment. In addition, the relative half life of pulse labeled DNA methyltransferase was prolonged by aphidicolin treatment. Both increase in synthesis and prolongation of half life of DNA methyltransferase in S phase contributed to the increase of the activity and the protein levels by aphidicolin treatment. Prolongation of half life was abolished by cycloheximide, suggesting that newly synthesized protein(s) with a short half life participated in the degradation of DNA methyltransferase.

UI	MeSH Term	Description	Entries
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
D004248	DNA (Cytosine-5-)-Methyltransferases	Enzymes that catalyzes the transfer of a methyl group from S-ADENOSYLMETHIONINE to the 5-position of CYTOSINE residues in DNA.	DNA (Cytosine-5-)-Methyltransferase,DNA Cytosine-5-Methylase,DNA (Cytosine 5) Methyltransferase,Cytosine-5-Methylase, DNA,DNA Cytosine 5 Methylase
D004915	Leukemia, Erythroblastic, Acute	A myeloproliferative disorder characterized by neoplastic proliferation of erythroblastic and myeloblastic elements with atypical erythroblasts and myeloblasts in the peripheral blood.	Di Guglielmo's Disease,Erythremic Myelosis,Erythroblastic Leukemia, Acute,Erythroleukemia,Leukemia, Myeloid, Acute, M6,Myeloid Leukemia, Acute, M6,Di Guglielmo Disease,Acute Erythroblastic Leukemia,Acute Erythroblastic Leukemias,Di Guglielmos Disease,Disease, Di Guglielmo,Disease, Di Guglielmo's,Erythremic Myeloses,Erythroblastic Leukemias, Acute,Erythroleukemias,Leukemia, Acute Erythroblastic,Leukemias, Acute Erythroblastic,Myeloses, Erythremic,Myelosis, Erythremic
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
D014407	Tumor Cells, Cultured	Cells grown in vitro from neoplastic tissue. If they can be established as a TUMOR CELL LINE, they can be propagated in cell culture indefinitely.	Cultured Tumor Cells,Neoplastic Cells, Cultured,Cultured Neoplastic Cells,Cell, Cultured Neoplastic,Cell, Cultured Tumor,Cells, Cultured Neoplastic,Cells, Cultured Tumor,Cultured Neoplastic Cell,Cultured Tumor Cell,Neoplastic Cell, Cultured,Tumor Cell, Cultured
D016196	S Phase	Phase of the CELL CYCLE following G1 and preceding G2 when the entire DNA content of the nucleus is replicated. It is achieved by bidirectional replication at multiple sites along each chromosome.	S Period,Period, S,Periods, S,Phase, S,Phases, S,S Periods,S Phases
D016590	Aphidicolin	An antiviral antibiotic produced by Cephalosporium aphidicola and other fungi. It inhibits the growth of eukaryotic cells and certain animal viruses by selectively inhibiting the cellular replication of DNA polymerase II or the viral-induced DNA polymerases. The drug may be useful for controlling excessive cell proliferation in patients with cancer, psoriasis or other dermatitis with little or no adverse effect upon non-multiplying cells.	Aphidicolin, (3-S-(3alpha,4beta,4abeta,6aalpha,8alpha,9alpha,11aalpha,11balpha))-Isomer,ICI-69653,NSC-234714,NSC-351140,ICI 69653,ICI69653,NSC 234714,NSC 351140,NSC234714,NSC351140
D051379	Mice	The common name for the genus Mus.	Mice, House,Mus,Mus musculus,Mice, Laboratory,Mouse,Mouse, House,Mouse, Laboratory,Mouse, Swiss,Mus domesticus,Mus musculus domesticus,Swiss Mice,House Mice,House Mouse,Laboratory Mice,Laboratory Mouse,Mice, Swiss,Swiss Mouse,domesticus, Mus musculus

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