Abstract:
:The major DNA-binding protein or infected cell protein 8 (ICP8) encoded by herpes simplex virus exhibits multiple interactions with the cell nucleus in that it interacts with the host cell nuclear matrix and viral DNA molecules as sequential stages in its maturational process (M. P. Quinlan, L. B. Chen, and D. M. Knipe (1984), Cell 36, 857-868). To define the portion(s) of ICP8 required for DNA binding, we have fine-mapped and identified the sequence changes in mutant genes causing changes in the protein that affect DNA binding. These mutations lead to amino acid changes between residues 348 and 450 of ICP8. Construction of a mutant ICP8 gene specifically altered at residues 499 and 502 led to a gene product that was also defective in a nuclear function. Thus, at least part of the region of ICP8 from residues 348 to 450 is required for DNA binding by ICP8. This portion of the protein may be involved in binding to DNA or forming intermolecular contacts needed for cooperative DNA binding. If this region is directly involved in binding of the protein to DNA, the most likely structure predicted for this region involves folding of beta-strands to form a channel for binding to a nucleotide chain.
journal_name
Virologyjournal_title
Virologyauthors
Gao M,Bouchey J,Curtin K,Knipe DMdoi
10.1016/0042-6822(88)90272-3subject
Has Abstractpub_date
1988-04-01 00:00:00pages
319-29issue
2eissn
0042-6822issn
1096-0341journal_volume
163pub_type
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