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Presence of a hypervariable region within the hr2 domain of the host range determining sequences of the envelope protein gp85 (SU) of subgroup-A avian sarcoma-leukosis viruses

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Abstract

The nucleotide sequence of the gene for the envelope protein gp85 (SU) of the Schmidt-Ruppin subgroup A (NY) strain of Rous sarcoma virus [SRA(NY)] was determined, and the deduced amino acid sequence was compared with those of other avian sarcoma-leukosis viruses. Among the five host-range determinant sequences (vr1, vr2, hr1, hr2, and vr3), the host-range determinant sequence hr2 of SRA(NY) showed a significant deviation from the hr2 sequences of other subgroup A viruses, namely, RAV-1 and SRA(SF). A phylogenetic analysis of the amino acid sequence of this region indicated that this intra-subgroup diversity was as great as or even greater than the inter-subgroup diversity found among other subgroups of ASLV. Within the hr2 region, we found a short hypervariable segment that differs in length and sequence from hr2 of other subgroup-A viruses. The difference in the hr2 amino acid sequence between SRA(NY) and SRA(SF) is reflected in the predicted protein secondary structure of this region.

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Authors and Affiliations

  1. Department of Microbiology, University of Pennsylvania School of Medicine, 19104, Philadelphia, PA, USA

    Hiroto Hara, Akio Tanaka & Akira Kaji

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  1. Hiroto Hara
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  2. Akio Tanaka
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  3. Akira Kaji
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Correspondence to Akira Kaji.

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Hara, H., Tanaka, A. & Kaji, A. Presence of a hypervariable region within the hr2 domain of the host range determining sequences of the envelope protein gp85 (SU) of subgroup-A avian sarcoma-leukosis viruses. Virus Genes 12, 37–46 (1996). https://doi.org/10.1007/BF00369999

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  • DOI: https://doi.org/10.1007/BF00369999

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