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env-Related leukemogenic genes (gp55 genes) of two closely related polycythemic strains of Friend spleen focus-forming virus possess different recombination points with an endogenous mink cell focus-forming virus env gene. 1984

M Obata, and H Amanuma, and Y Harada, and N Sagata, and Y Ikawa

The unintegrated circular provival DNA of the replication-competent, helper Friend murine leukemia virus (F-MuLV) in a polycythemic strain of Friend leukemia virus complex (FLV, K-1 strain) was molecularly cloned after insertion into the EcoRI site of the plasmid pBR322. The nucleotide sequence of its env gene has been determined. Sequences of this F-MuLV env gene, and the previously reported env-related gene (gp55 gene) of Friend spleen focus-forming virus (SFFV) (K-1 strain) were compared to that of the same gene of the other polycythemic SFFV isolate, SFFV (502), recently reported by Clark and Mak. The gp55 genes of the two SFFV isolates are almost identical to each other and have several common characteristic structures. However, the two gp55 genes are different in that the gp55 gene of SFFV (K-1) has a longer nonecotropic MuLV env sequence than that of SFFV (502). This finding may suggest that each SFFV isolate has been generated independently by recombination between a putative defective variant of F-MuLV and an endogenous mink cell focus-forming virus env sequence.

UI MeSH Term Description Entries
D010957 Plasmids Extrachromosomal, usually CIRCULAR DNA molecules that are self-replicating and transferable from one organism to another. They are found in a variety of bacterial, archaeal, fungal, algal, and plant species. They are used in GENETIC ENGINEERING as CLONING VECTORS. Episomes,Episome,Plasmid
D003001 Cloning, Molecular The insertion of recombinant DNA molecules from prokaryotic and/or eukaryotic sources into a replicating vehicle, such as a plasmid or virus vector, and the introduction of the resultant hybrid molecules into recipient cells without altering the viability of those cells. Molecular Cloning
D005622 Friend murine leukemia virus A strain of Murine leukemia virus (LEUKEMIA VIRUS, MURINE) producing leukemia of the reticulum-cell type with massive infiltration of liver, spleen, and bone marrow. It infects DBA/2 and Swiss mice. Friend Virus,Rowson-Parr Virus,Rowson Parr Virus,Virus, Friend,Virus, Rowson-Parr
D005796 Genes A category of nucleic acid sequences that function as units of heredity and which code for the basic instructions for the development, reproduction, and maintenance of organisms. Cistron,Gene,Genetic Materials,Cistrons,Genetic Material,Material, Genetic,Materials, Genetic
D005814 Genes, Viral The functional hereditary units of VIRUSES. Viral Genes,Gene, Viral,Viral Gene
D000595 Amino Acid Sequence The order of amino acids as they occur in a polypeptide chain. This is referred to as the primary structure of proteins. It is of fundamental importance in determining PROTEIN CONFORMATION. Protein Structure, Primary,Amino Acid Sequences,Sequence, Amino Acid,Sequences, Amino Acid,Primary Protein Structure,Primary Protein Structures,Protein Structures, Primary,Structure, Primary Protein,Structures, Primary Protein
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
D001483 Base Sequence The sequence of PURINES and PYRIMIDINES in nucleic acids and polynucleotides. It is also called nucleotide sequence. DNA Sequence,Nucleotide Sequence,RNA Sequence,DNA Sequences,Base Sequences,Nucleotide Sequences,RNA Sequences,Sequence, Base,Sequence, DNA,Sequence, Nucleotide,Sequence, RNA,Sequences, Base,Sequences, DNA,Sequences, Nucleotide,Sequences, RNA
D013045 Species Specificity The restriction of a characteristic behavior, anatomical structure or physical system, such as immune response; metabolic response, or gene or gene variant to the members of one species. It refers to that property which differentiates one species from another but it is also used for phylogenetic levels higher or lower than the species. Species Specificities,Specificities, Species,Specificity, Species
D014759 Viral Envelope Proteins Integral membrane proteins that are incorporated into the VIRAL ENVELOPE. They are glycosylated during VIRAL ASSEMBLY. Envelope Proteins, Viral,Viral Envelope Glycoproteins,Viral Envelope Protein,Virus Envelope Protein,Virus Peplomer Proteins,Bovine Leukemia Virus Glycoprotein gp51,Hepatitis Virus (MHV) Glycoprotein E2,LaCrosse Virus Envelope Glycoprotein G1,Simian Sarcoma Virus Glycoprotein 70,Viral Envelope Glycoprotein gPr90 (Murine Leukemia Virus),Viral Envelope Glycoprotein gp55 (Friend Virus),Viral Envelope Proteins E1,Viral Envelope Proteins E2,Viral Envelope Proteins gp52,Viral Envelope Proteins gp70,Virus Envelope Proteins,Envelope Glycoproteins, Viral,Envelope Protein, Viral,Envelope Protein, Virus,Envelope Proteins, Virus,Glycoproteins, Viral Envelope,Peplomer Proteins, Virus,Protein, Viral Envelope,Protein, Virus Envelope,Proteins, Viral Envelope,Proteins, Virus Envelope,Proteins, Virus Peplomer

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