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Apart from cellular receptors, viral tropism can also governed by other intracellular factors, such as tissue-specific transcription factors. An example would be the JC polyomavirus , in which its tropism is limited to glial cells since its enhancer is only active in glial cells, [ 2 ] and JC viral gene expression requires host transcription ...
Viral replication is the formation of biological viruses during the infection process in the target host cells. Viruses must first get into the cell before viral replication can occur. Through the generation of abundant copies of its genome and packaging these copies, the virus continues infecting new hosts. Replication between viruses is ...
Other transcription factors differentially regulate the expression of various genes by binding to enhancer regions of DNA adjacent to regulated genes. These transcription factors are critical to making sure that genes are expressed in the right cell at the right time and in the right amount, depending on the changing requirements of the organism.
The transactivator gene expresses a transcription factor that binds to specific promoter region of DNA. By binding to the promoter region of a gene, the transcription factor causes that gene to be expressed. The expression of one transactivator gene can activate multiple genes, as long as they have the same, specific promoter region attached.
Transcription – the host cell's DNA is degraded and the cell's metabolism is directed to initiate phage biosynthesis; Biosynthesis – the phage DNA replicates inside the cell, synthesizing new phage DNA and proteins; Maturation – the replicated material assembles into fully formed viral phages (each made up of a head, a tail and tail fibers)
Interferon regulatory factors (IRF) are proteins which regulate transcription of interferons (see regulation of gene expression). [1] Interferon regulatory factors contain a conserved N-terminal region of about 120 amino acids, which folds into a structure that binds specifically to the IRF-element (IRF-E) motifs, which is located upstream of the interferon genes. [2]
Myb proto-oncogene protein is a member of the MYB (myeloblastosis) family of transcription factors. The protein contains three domains, an N-terminal DNA-binding domain, a central transcriptional activation domain and a C-terminal domain involved in transcriptional repression. It may play a role in cell cycle regulation.
2.5 Viral replication. 2.6 ... The XBP1 protein is a transcription factor that regulates the expression of genes important to the proper functioning of the immune ...
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