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A predictive model for DNA recognition by the herpes simplex virus protein ICP4
J A DiDonato1, J R Spitzner, M T Muller
1Ohio State University, Department of Molecular Genetics, Columbus 43210.
Journal of Molecular Biology
|June 5, 1991
Summary
Herpes simplex virus type 1 ICP4 protein binds DNA at specific sites to regulate gene expression. A unified model and consensus sequence (RTCGTCNNYNYSG) now describe all ICP4 binding sites, improving prediction accuracy.
Area of Science:
- Molecular Biology
- Virology
- Genetics
Background:
- Herpes simplex virus (HSV) type 1 immediate early protein ICP4 is a key regulatory enzyme.
- ICP4 directly binds DNA to control viral gene expression, with binding site characteristics influencing regulatory outcomes.
Purpose of the Study:
- To develop a unified model describing all ICP4 DNA binding sites.
- To identify the critical sequence and features of ICP4 binding sites for accurate prediction.
Main Methods:
- Statistical analysis of known ICP4 binding sites.
- Missing contact analyses to identify critical protein-DNA interaction regions.
- Derivation of a consensus binding sequence and a Matrix Mean model.
Main Results:
- Identified a 13-base region critical for ICP4 binding.
- Derived the consensus binding sequence: RTCGTCNNYNYSG.
- Developed a Matrix Mean model that accurately predicts novel ICP4 binding sites.
Conclusions:
- A single model accurately characterizes all ICP4 binding sites.
- The Matrix Mean model enhances understanding of HSV-1 gene regulation by ICP4.
- Potential ICP4 binding sites across the HSV-1 genome were identified, suggesting broader roles in viral gene control.