Biomaterial Database

RNA metabolism of murine leukemia virus. III. Identification and quantitation of endogenous virus-specific mRNA in the uninfected BALB/c cell line JLS-V9. 1976

H Fan, and N Mueller-Lantzsch

mRNA containing type C endogenous virus-specific sequences was indentified in JLS-V9 cells (an uninfected BALB/c-derived cell line) by annealing extracted RNA with 3H-labeled virus-specific DNA. The criterion for virus-specific RNA being mRNA was that it co-sedimented with polyribosomes in a sucrose gradient and that it changed to lower sedimentation value if polyribosomes were disagregated prior to centrifugation. It was not possible to identify virus-specific mRNA in unfractionated cytoplasm from JLS-V9 cells since large amounts of virus-specific ribonucleoprotein which was not mRNA had sedimentation values similar to polyribosomes and obscured the analysis. Virus-specific mRNA could be readily identified in polyribosomes which had been purified through a step gradient of 1 and 2 M sucrose, and consisted of two species with sedimentation values of 38S and 27S. The amount of virus-specific RNA in different JLS-V9 cell fractions was quantitated in comparison to cell fractions obtained from M-MuLV clone no. 1 cells (a line of NIH 3T3 cells producing Moloney murine leukemia virus). Approximately 40% of the total virus-specific mRNA was recovered in the purified polyribosomes in M-MuLV no. 1 cells. The amount of virus-specific RNA on polyribosomes appeared to be quite similar for JLS-V9 cells and M-MuLV clone no.1 cells . In contrast, the level of virus-specific protein in JLS-V9 cells (as monitored by radioimmunoassay of the internal structural protein p30) was less than 2% the level in the M-MuLV clone no. 1 cells.

UI	MeSH Term	Description	Entries
D007065	Idoxuridine	An analog of DEOXYURIDINE that inhibits viral DNA synthesis. The drug is used as an antiviral agent.	5-Iodo-2'-deoxyuridine,IUdR,Iododeoxyuridine,5-Iododeoxyuridine,Allergan 211,Herplex Liquifilm,Idoxuridine, 123I-Labeled,Idoxuridine, 125I-Labeled,Idoxuridine, 131I-Labeled,Idoxuridine, 3H-Labeled,Idoxuridine, Radical Ion (+1),Idoxuridine, Radical Ion (1-),Kerecide,NSC-39661,Oftan-IDU,SK&F-14287,Stoxil,123I-Labeled Idoxuridine,125I-Labeled Idoxuridine,131I-Labeled Idoxuridine,3H-Labeled Idoxuridine,5 Iodo 2' deoxyuridine,5 Iododeoxyuridine,Idoxuridine, 123I Labeled,Idoxuridine, 125I Labeled,Idoxuridine, 131I Labeled,Idoxuridine, 3H Labeled,Liquifilm, Herplex,NSC 39661,NSC39661,Oftan IDU,OftanIDU
D008815	Mice, Inbred Strains	Genetically identical individuals developed from brother and sister matings which have been carried out for twenty or more generations, or by parent x offspring matings carried out with certain restrictions. All animals within an inbred strain trace back to a common ancestor in the twentieth generation.	Inbred Mouse Strains,Inbred Strain of Mice,Inbred Strain of Mouse,Inbred Strains of Mice,Mouse, Inbred Strain,Inbred Mouse Strain,Mouse Inbred Strain,Mouse Inbred Strains,Mouse Strain, Inbred,Mouse Strains, Inbred,Strain, Inbred Mouse,Strains, Inbred Mouse
D008979	Moloney murine leukemia virus	A strain of Murine leukemia virus (LEUKEMIA VIRUS, MURINE) arising during the propagation of S37 mouse sarcoma, and causing lymphoid leukemia in mice. It also infects rats and newborn hamsters. It is apparently transmitted to embryos in utero and to newborns through mother's milk.	Moloney Leukemia Virus,Leukemia Virus, Moloney,Virus, Moloney Leukemia
D009052	Leukemia Virus, Murine	Species of GAMMARETROVIRUS, containing many well-defined strains, producing leukemia in mice. Disease is commonly induced by injecting filtrates of propagable tumors into newborn mice.	Graffi Virus,Graffi's Chloroleukemic Strain,Leukemia Viruses, Murine,Mouse Leukemia Viruses,Murine Leukemia Virus,Murine Leukemia Viruses,Graffi Chloroleukemic Strain,Graffis Chloroleukemic Strain,Leukemia Viruses, Mouse
D011132	Polyribosomes	A multiribosomal structure representing a linear array of RIBOSOMES held together by messenger RNA; (RNA, MESSENGER); They represent the active complexes in cellular protein synthesis and are able to incorporate amino acids into polypeptides both in vivo and in vitro. (From Rieger et al., Glossary of Genetics: Classical and Molecular, 5th ed)	Polysomes,Polyribosome,Polysome
D002460	Cell Line	Established cell cultures that have the potential to propagate indefinitely.	Cell Lines,Line, Cell,Lines, Cell
D003593	Cytoplasm	The part of a cell that contains the CYTOSOL and small structures excluding the CELL NUCLEUS; MITOCHONDRIA; and large VACUOLES. (Glick, Glossary of Biochemistry and Molecular Biology, 1990)	Protoplasm,Cytoplasms,Protoplasms
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
D012190	Retroviridae	Family of RNA viruses that infects birds and mammals and encodes the enzyme reverse transcriptase. The family contains seven genera: DELTARETROVIRUS; LENTIVIRUS; RETROVIRUSES TYPE B, MAMMALIAN; ALPHARETROVIRUS; GAMMARETROVIRUS; RETROVIRUSES TYPE D; and SPUMAVIRUS. A key feature of retrovirus biology is the synthesis of a DNA copy of the genome which is integrated into cellular DNA. After integration it is sometimes not expressed but maintained in a latent state (PROVIRUSES).	Leukemogenic Viruses,Leukoviruses,Oncornaviruses,Oncovirinae,Oncoviruses,Oncoviruses, Type C,RNA Tumor Viruses,Retroviruses,Type C Oncoviruses,C Oncovirus, Type,C Oncoviruses, Type,Leukemogenic Virus,Leukovirus,Oncornavirus,Oncovirus,Oncovirus, Type C,RNA Tumor Virus,Retrovirus,Tumor Virus, RNA,Tumor Viruses, RNA,Type C Oncovirus,Virus, Leukemogenic,Virus, RNA Tumor,Viruses, Leukemogenic,Viruses, RNA Tumor
D012333	RNA, Messenger	RNA sequences that serve as templates for protein synthesis. Bacterial mRNAs are generally primary transcripts in that they do not require post-transcriptional processing. Eukaryotic mRNA is synthesized in the nucleus and must be exported to the cytoplasm for translation. Most eukaryotic mRNAs have a sequence of polyadenylic acid at the 3' end, referred to as the poly(A) tail. The function of this tail is not known for certain, but it may play a role in the export of mature mRNA from the nucleus as well as in helping stabilize some mRNA molecules by retarding their degradation in the cytoplasm.	Messenger RNA,Messenger RNA, Polyadenylated,Poly(A) Tail,Poly(A)+ RNA,Poly(A)+ mRNA,RNA, Messenger, Polyadenylated,RNA, Polyadenylated,mRNA,mRNA, Non-Polyadenylated,mRNA, Polyadenylated,Non-Polyadenylated mRNA,Poly(A) RNA,Polyadenylated mRNA,Non Polyadenylated mRNA,Polyadenylated Messenger RNA,Polyadenylated RNA,RNA, Polyadenylated Messenger,mRNA, Non Polyadenylated