A Revision of Herpes Simplex Virus Type 1 Transcription: First, Repress; Then, Express
The herpes virus genome bears more than 80 strong transcriptional promoters. Upon entry into the host cell nucleus, these genes are transcribed in an orderly manner, producing five immediate–early (IE) gene products, including ICP0, ICP4, and ICP22, while non-IE genes are mostly silent. The IE gene...
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| Format: | Article |
| Language: | English |
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MDPI AG
2024-01-01
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| Series: | Microorganisms |
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| Online Access: | https://www.mdpi.com/2076-2607/12/2/262 |
| _version_ | 1797297394141888512 |
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| author | Laura E. M. Dunn Claire H. Birkenheuer Joel D. Baines |
| author_facet | Laura E. M. Dunn Claire H. Birkenheuer Joel D. Baines |
| author_sort | Laura E. M. Dunn |
| collection | DOAJ |
| description | The herpes virus genome bears more than 80 strong transcriptional promoters. Upon entry into the host cell nucleus, these genes are transcribed in an orderly manner, producing five immediate–early (IE) gene products, including ICP0, ICP4, and ICP22, while non-IE genes are mostly silent. The IE gene products are necessary for the transcription of temporal classes following sequentially as early, leaky late, and true late. A recent analysis using precision nuclear run-on followed by deep sequencing (PRO-seq) has revealed an important step preceding all HSV-1 transcription. Specifically, the immediate–early proteins ICP4 and ICP0 enter the cell with the incoming genome to help preclude the nascent antisense, intergenic, and sense transcription of all viral genes. VP16, which is also delivered into the nucleus upon entry, almost immediately reverses this repression on IE genes. The resulting de novo expression of ICP4 and ICP22 further repress antisense, intergenic, and early and late viral gene transcription through different mechanisms before the sequential de-repression of these gene classes later in infection. This early repression, termed transient immediate–early protein-mediated repression (TIEMR), precludes unproductive, antisense, intergenic, and late gene transcription early in infection to ensure the efficient and orderly progression of the viral cascade. |
| first_indexed | 2024-03-07T22:20:42Z |
| format | Article |
| id | doaj.art-40377e8d1a25424cb842aeefbb9ff54b |
| institution | Directory Open Access Journal |
| issn | 2076-2607 |
| language | English |
| last_indexed | 2024-03-07T22:20:42Z |
| publishDate | 2024-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Microorganisms |
| spelling | doaj.art-40377e8d1a25424cb842aeefbb9ff54b2024-02-23T15:28:01ZengMDPI AGMicroorganisms2076-26072024-01-0112226210.3390/microorganisms12020262A Revision of Herpes Simplex Virus Type 1 Transcription: First, Repress; Then, ExpressLaura E. M. Dunn0Claire H. Birkenheuer1Joel D. Baines2Baker Institute for Animal Health, Department of Microbiology and Immunology, Cornell University, Ithaca, NY 14850, USABaker Institute for Animal Health, Department of Microbiology and Immunology, Cornell University, Ithaca, NY 14850, USABaker Institute for Animal Health, Department of Microbiology and Immunology, Cornell University, Ithaca, NY 14850, USAThe herpes virus genome bears more than 80 strong transcriptional promoters. Upon entry into the host cell nucleus, these genes are transcribed in an orderly manner, producing five immediate–early (IE) gene products, including ICP0, ICP4, and ICP22, while non-IE genes are mostly silent. The IE gene products are necessary for the transcription of temporal classes following sequentially as early, leaky late, and true late. A recent analysis using precision nuclear run-on followed by deep sequencing (PRO-seq) has revealed an important step preceding all HSV-1 transcription. Specifically, the immediate–early proteins ICP4 and ICP0 enter the cell with the incoming genome to help preclude the nascent antisense, intergenic, and sense transcription of all viral genes. VP16, which is also delivered into the nucleus upon entry, almost immediately reverses this repression on IE genes. The resulting de novo expression of ICP4 and ICP22 further repress antisense, intergenic, and early and late viral gene transcription through different mechanisms before the sequential de-repression of these gene classes later in infection. This early repression, termed transient immediate–early protein-mediated repression (TIEMR), precludes unproductive, antisense, intergenic, and late gene transcription early in infection to ensure the efficient and orderly progression of the viral cascade.https://www.mdpi.com/2076-2607/12/2/262transcriptionICP4ICP0RNA polymerase IIICP22HSV-1 |
| spellingShingle | Laura E. M. Dunn Claire H. Birkenheuer Joel D. Baines A Revision of Herpes Simplex Virus Type 1 Transcription: First, Repress; Then, Express Microorganisms transcription ICP4 ICP0 RNA polymerase II ICP22 HSV-1 |
| title | A Revision of Herpes Simplex Virus Type 1 Transcription: First, Repress; Then, Express |
| title_full | A Revision of Herpes Simplex Virus Type 1 Transcription: First, Repress; Then, Express |
| title_fullStr | A Revision of Herpes Simplex Virus Type 1 Transcription: First, Repress; Then, Express |
| title_full_unstemmed | A Revision of Herpes Simplex Virus Type 1 Transcription: First, Repress; Then, Express |
| title_short | A Revision of Herpes Simplex Virus Type 1 Transcription: First, Repress; Then, Express |
| title_sort | revision of herpes simplex virus type 1 transcription first repress then express |
| topic | transcription ICP4 ICP0 RNA polymerase II ICP22 HSV-1 |
| url | https://www.mdpi.com/2076-2607/12/2/262 |
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