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PMID: 6292485 Published · ppublish English Journal Article Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, P.H.S.

Characterization of an infective molecular clone of the B-tropic, ecotropic BL/Ka(B) murine retrovirus genome.

Journal of virology ·Vol. 44 ·No. 1 ·1982-10-00 ·Pages 217-25

Kim JP, Kaplan HS, Fry KE

Abstract

Using molecular cloning techniques, we amplified the unintegrated, linear proviral DNA of the BL/Ka(B) virus, a non-leukemogenic retrovirus of mouse strain C57BL/Ka. Two independent clones in lambda phage vector 607 and one subclone in pBR322 were infective when transfected into mouse fibroblasts. Analysis of the progeny virus revealed biological properties and a restriction map identical to those of the parental viral shock. Comparison of the restriction map with the maps of other ecotropic murine viruses reveals many similarities. Particularly interesting is the comparison of the N-tropic Akv virus and the B-tropic BL/Ka(B) virus. The long terminal repeats of the two viruses are virtually identical, as are 22 of 23 restriction sites located outside of the region which spans from 1.8 to 3.8 kilobases from the left end of the genome. Within this region, however, only three of nine sites examined are shared. This suggests that the BL/Ka(B) virus was derived from an endogenous N-tropic virus closely related to Akv by recombinational events which altered the sequence in the last half of the gag gene and the first third of the pol gene. This change is probably responsible for the observed difference in the Fv-1 tropism of the two viruses.

MeSH Terms
Animals Base Sequence Cell Line Cloning, Molecular DNA Restriction Enzymes Genes, Viral Mice Recombination, Genetic Retroviridae/genetics Transfection
Chemicals
DNA Restriction Enzymes
Authors & Affiliations
3 authors, click to expand affiliations / ORCID
Kim J P
Kaplan H S
Fry K E
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54 references, click to expand
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Article Info
Journal
Journal of virology
Abbr.
J Virol
ISSN
0022-538X
DOI
10.1128/JVI.44.1.217-225.1982
Published
1982-10-00
Pages
217-25
Language
English
Region
United States
NLM ID
0113724
PMCID
PMC256255
Subset
IM
Grants
NCI NIH HHS · CA-03352 · United States
NCI NIH HHS · CA-10372 · United States
NCI NIH HHS · CA-29079 · United States
Databases
GENBANK
J02041
External Links
PubMed source DOI: 10.1128/JVI.44.1.217-225.1982 PMC Full Text View journal details
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