Crystal structure of the conserved core of the herpes simplex virus transcriptional regulatory protein VP16.
On infection, the herpes simplex virus (HSV) virion protein VP16 (Vmw65; alphaTIF) forms a transcriptional regulatory complex-the VP16-induced complex-with two cellular proteins, HCF and Oct-1, on VP16-responsive cis-regulatory elements in HSV immediate-early promoters called TAATGARAT. Comparison of different HSV VP16 sequences reveals a conserved core region that is sufficient for VP16-induced complex formation. The crystal structure of the VP16 core has been determined at 2.1 A resolution. The results reveal a novel, seat-like protein structure. Together with the activity of mutant VP16 proteins, the structure of free VP16 suggests that it contains (1) a disordered carboxy-terminal region that associates with HCF, Oct-1, and DNA in the VP16-induced complex, and (2) a structured region involved in virion assembly and possessing a novel DNA-binding surface that differentiates among TAATGARAT VP16-response elements.
Liu
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Cold Spring Harbor Laboratory, Cold Spring Harbor, New York 11724, USA.
Gong
W
W
Huang
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CC
Herr
W
W
Cheng
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X
D000595:Amino Acid Sequence; D003460:Crystallization; D018360:Crystallography, X-Ray; D004247:DNA / Q000378:metabolism; D004268:DNA-Binding Proteins / Q000378:metabolism; D015967:Gene Expression Regulation, Viral; D017405:Herpes Simplex Virus Protein Vmw65 / Q000737:chemistry* / Q000235:genetics / Q000378:metabolism; D006564:Herpesviridae / Q000737:chemistry; D051863:Host Cell Factor C1; D046911:Macromolecular Substances; D008958:Models, Molecular; D008969:Molecular Sequence Data; D016297:Mutagenesis, Site-Directed; D050811:Octamer Transcription Factor-1; D011487:Protein Conformation; D011993:Recombinant Fusion Proteins / Q000235:genetics; D012045:Regulatory Sequences, Nucleic Acid; D016415:Sequence Alignment; D017386:Sequence Homology, Amino Acid; D018139:Simplexvirus / Q000737:chemistry* / Q000502:physiology; D014157:Transcription Factors / Q000378:metabolism; D015533:Transcriptional Activation
D004268:DNA-Binding Proteins; D017405:Herpes Simplex Virus Protein Vmw65; D051863:Host Cell Factor C1; D046911:Macromolecular Substances; D050811:Octamer Transcription Factor-1; D011993:Recombinant Fusion Proteins; D014157:Transcription Factors; D004247:DNA