Abstract
The E46+ strain of Adenovirus 7 is a mixed-virus population containing defective Adenoviurs 7-SV40 hybrid particles and helper, nonhybrid Adenovirus 7 particles. We have applied electron microscopic mapping techniques to obtain a physical map of the genome of the hybrid particles present in E46+PL1, a substrain of E46+ derived from a single two-hit plaque. DNA molecules extracted from purified E46+Pl1 virions were found to be linear duplexes, with a mean lenght of 10.9 μm. When these molecules were denatured and renatured, a unique heteroduplex was formed that presumably derived one of its strands from an Adenovirus 7-SV40 hybrid molecule and the other from a nonhybrid Adenovirus 7 molecule. This heteroduplex was double-stranded, except for a short region near one end where the two strands were not paired. On the basis of measurements of the lengths of the single-and double-stranded regions in the heteroduplex, the structure of the Adenovirus 7-SV40 hybrid genome can be reconstructed as follows: The hybrid genome contains 16% less Adenovirus 7 DNA than the nonhybrid Adenovirus 7 genome. This deletion consists of the segment of DNA that maps between 0.05 and 0.21 molecular lenghts in the nonhybrid Adenovirus 7 DNA molecule. The deleted DNA has been partially replaced by an amount of heterologous DNA equivalent to 75% of the complete SV40 genome. A model for the generation of the hybrid genome is presented.
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- Baum S. G., Reich P. R., Hybner C. J., Rowe W. P., Weissman S. M. Biophysical evidence for linkage of adenovirus and SV40 DNA's in adenovirus 7-SV40 hybrid particles. Proc Natl Acad Sci U S A. 1966 Nov;56(5):1509–1515. doi: 10.1073/pnas.56.5.1509. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Baum S. G., Wiese W. H., Rowe W. P. Density differences between hybrid and nonhybrid particles in two adenovirus-simian virus 40 hybrid populations. J Virol. 1970 Mar;5(3):353–357. doi: 10.1128/jvi.5.3.353-357.1970. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Davis R. W., Davidson N. Electron-microscopic visualization of deletion mutations. Proc Natl Acad Sci U S A. 1968 May;60(1):243–250. doi: 10.1073/pnas.60.1.243. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Doerfler W., Kleinschmidt A. K. Denaturation pattern of the DNA of adenovirus type 2 as determined by electron microscopy. J Mol Biol. 1970 Jun 28;50(3):579–593. doi: 10.1016/0022-2836(70)90086-0. [DOI] [PubMed] [Google Scholar]
- Duff R., Rapp F. Quantitative characteristics of the transformation of hamster cells by PARA (defective simian virus 40)-adenovirus 7. J Virol. 1970 May;5(5):568–577. doi: 10.1128/jvi.5.5.568-577.1970. [DOI] [PMC free article] [PubMed] [Google Scholar]
- GREEN M., PINA M. Biochemical studies on adenovirus multiplication. IV. Isolation, purification, and chemical analysis of adenovirus. Virology. 1963 May;20:199–207. doi: 10.1016/0042-6822(63)90157-0. [DOI] [PubMed] [Google Scholar]
- HUEBNER R. J., CHANOCK R. M., RUBIN B. A., CASEY M. J. INDUCTION BY ADENOVIRUS TYPE 7 OF TUMORS IN HAMSTERS HAVING THE ANTIGENIC CHARACTERISTICS OF SV40 VIRUS. Proc Natl Acad Sci U S A. 1964 Dec;52:1333–1340. doi: 10.1073/pnas.52.6.1333. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Hoggan M. D., Blacklow N. R., Rowe W. P. Studies of small DNA viruses found in various adenovirus preparations: physical, biological, and immunological characteristics. Proc Natl Acad Sci U S A. 1966 Jun;55(6):1467–1474. doi: 10.1073/pnas.55.6.1467. [DOI] [PMC free article] [PubMed] [Google Scholar]
- RABSON A. S., O'CONOR G. T., BEREZESKY I. K., PAUL F. J. ENHANCEMENT OF ADENOVIRUS GROWTH IN AFRICAN GREEN MONKEY KIDNEY CELL CULTURES BY SV40. Proc Soc Exp Biol Med. 1964 May;116:187–190. doi: 10.3181/00379727-116-29197. [DOI] [PubMed] [Google Scholar]
- RAPP F., MELNICK J. L., BUTEL J. S., KITAHARA T. THE INCORPORATION OF SV40 MATERIAL INTO ADENOVIRUS 7 AS MEASURED BY INTRANUCLEAR SYNTHESIS OF SV40 TUMOR ANTIGEN. Proc Natl Acad Sci U S A. 1964 Dec;52:1348–1352. doi: 10.1073/pnas.52.6.1348. [DOI] [PMC free article] [PubMed] [Google Scholar]
- ROWE W. P., BAUM S. G. EVIDENCE FOR A POSSIBLE GENETIC HYBRID BETWEEN ADENOVIRUS TYPE 7 AND SV40 VIRUSES. Proc Natl Acad Sci U S A. 1964 Dec;52:1340–1347. doi: 10.1073/pnas.52.6.1340. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Rapp F., Tevethia S. S., Melnick J. L. Papovavirus SV40 transplantation immunity conferred by an adenovirus-SV40 hybrid. J Natl Cancer Inst. 1966 Apr;36(4):703–708. doi: 10.1093/jnci/36.4.703. [DOI] [PubMed] [Google Scholar]
- Rose J. A., Reich P. R., Weissman S. M. RNA production in adenovirus-infected KB cells. Virology. 1965 Dec;27(4):571–579. doi: 10.1016/0042-6822(65)90183-2. [DOI] [PubMed] [Google Scholar]
- Rowe W. P., Bau S. G. Studies of adenovirus SV40 hybrid viruses. II. Defectiveness of the hybrid particles. J Exp Med. 1965 Nov 1;122(5):955–966. doi: 10.1084/jem.122.5.955. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Rowe W. P., Pugh W. E. Studies of adenovirus-SV40 hybrid viruses. V. Evidence for linkage between adenovirus and SV40 genetic materials. Proc Natl Acad Sci U S A. 1966 May;55(5):1126–1132. doi: 10.1073/pnas.55.5.1126. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Thomas C. A., Jr The arrangement of information in DNA molecules. J Gen Physiol. 1966 Jul;49(6):143–169. doi: 10.1085/jgp.49.6.143. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Westmoreland B. C., Szybalski W., Ris H. Mapping of deletions and substitutions in heteroduplex DNA molecules of bacteriophage lambda by electron microscopy. Science. 1969 Mar 21;163(3873):1343–1348. doi: 10.1126/science.163.3873.1343. [DOI] [PubMed] [Google Scholar]