herpes genitalis/protease

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Herpes simplex virus downregulates secretory leukocyte protease inhibitor: a novel immune evasion mechanism.

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Secretory leukocyte protease inhibitor (SLPI), an anti-inflammatory mediator of mucosal immunity, inhibits human immunodeficiency virus (HIV) and herpes simplex virus (HSV) in cell culture. Epidemiological studies demonstrate that higher concentrations of SLPI in mucosal secretions are associated

Herpes simplex virus type 1 protease expressed in Escherichia coli exhibits autoprocessing and specific cleavage of the ICP35 assembly protein.

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The UL26 gene of herpes simplex virus type 1 (HSV-1) encodes a protease which is responsible for the C-terminal cleavage of the nucleocapsid-associated proteins, ICP35 c and d, to their posttranslationally modified counterparts, ICP35 e and f. To further characterize the HSV-1 protease, the UL26

Protease-deficient herpes simplex virus protects mice from lethal herpesvirus infection.

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Null mutants and attenuated mutants of herpes simplex virus (HSV) have been shown to induce immunity against challenge from wild-type virus. Null viruses with a defect in late gene products would be expected to express more viral genes than viruses with defects in essential early gene products and

Release of the catalytic domain N(o) from the herpes simplex virus type 1 protease is required for viral growth.

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The herpes simplex virus type 1 (HSV-1) protease and its substrate, ICP35, are involved in the assembly of viral capsids and required for efficient viral growth. The full-length protease (Pra) consists of 635 amino acid (aa) residues and is autoproteolytically processed at the release (R) site and

Purification of active herpes simplex virus-1 protease expressed in Escherichia coli.

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Assembly of viral capsids for replication of herpes simplex virus requires the proteolytic processing of the assembly protein ICP35. The protease responsible for this process is encoded within the 635-amino acid open reading frame of the UL26 gene of the virus. A simple purification scheme is given

Dimerization and activation of the herpes simplex virus type 1 protease.

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The quaternary state of the herpes simplex virus type 1 (HSV-1) protease has been analyzed in relation to its catalytic activity. The dependence of specific activity upon enzyme concentration indicated that association of the 27-kDa subunits strongly increased activity. Size-exclusion chromatography

Na, an autoproteolytic product of the herpes simplex virus type 1 protease, can functionally substitute for the assembly protein ICP35.

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The herpes simplex virus type 1 (HSV-1) protease and its substrate, the assembly protein ICP35, are involved in virion maturation. Both proteins are encoded by a single open reading frame but are translated independently from 3'-coterminal mRNAs of different sizes and are in frame. The herpesvirus

Differentiation of multiple domains in the herpes simplex virus 1 protease encoded by the UL26 gene.

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Previous studies have shown that the herpes simplex virus 1 gene UL26 encodes a 635-amino acid protease that cleaves approximately 20 amino acids from the carboxyl terminus of itself and of a 329-amino acid product of the UL26.5 gene. The results of studies with a variety of protease inhibitors

Identification of the serine residue at the active site of the herpes simplex virus type 1 protease.

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Herpes simplex virus type 1 (HSV-1) encodes a protease that is essential for proteolytic processing of itself and of the nucleocapsid-associated protein, ICP35 (infected cell protein 35) (Liu, F., and Roizman, B. (1991) J. Virol. 65, 5149-5156). Inhibitor studies indicated that the HSV-1 protease is

Identification of the herpes simplex virus-1 protease cleavage sites by direct sequence analysis of autoproteolytic cleavage products.

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Herpes simplex virus type-1 (HSV-1) encodes a protease responsible for proteolytic processing of the virus assembly protein, ICP35 (infected cell protein 35). The coding region of ICP35 is contained within the gene that encodes the protease, and ICP35 shares amino acid identity with the

Autoproteolysis of herpes simplex virus type 1 protease releases an active catalytic domain found in intermediate capsid particles.

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The UL26 gene of herpes simplex virus type 1 (HSV-1) encodes a 635-amino-acid protease that cleaves itself and the HSV-1 assembly protein ICP35cd (F. Liu and B. Roizman, J. Virol. 65:5149-5156, 1991). We previously examined the HSV protease by using an Escherichia coli expression system (I. C.

Overexpression of the ubiquitin-specific protease 7 resulting from transfection or mutations in the ICP0 binding site accelerates rather than depresses herpes simplex virus 1 gene expression.

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Earlier studies reported that ICP0, a key regulatory protein encoded by herpes simplex virus 1 (HSV-1), binds ubiquitin-specific protease 7 (USP7). The fundamental conclusion of these studies is that depletion of USP7 destabilized ICP0, that ICP0 mediated the degradation of USP7, and that amino acid

The herpes simplex virus type 1 DNA polymerase accessory protein, UL42, contains a functional protease-resistant domain.

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Herpes simplex virus type 1 encodes its own DNA polymerase (Pol), the product of the UL30 gene, and a polymerase accessory subunit, the product of the UL42 gene, both of which are required for viral DNA replication. Pol and the UL42 protein associate to form a heterodimeric complex (Pol/UL42) which

Production of recombinant herpes simplex virus protease in 10-L stirred vessels using a baculovirus-insect cell expression system.

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A gene expression system using recombinant Autographa california nuclear polyhedrosis virus (baculovirus) and Sf-9 cells has been scaled up to the 10-L tank level and shown to be capable of producing herpes simplex virus (HSV) protease in serum-free media. High densities of Spodoptera frugiperda

Release of the herpes simplex virus 1 protease by self cleavage is required for proper conformation of the portal vertex.

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We identify an NLS within herpes simplex virus scaffold proteins that is required for optimal nuclear import of these proteins into infected or uninfected nuclei, and is sufficient to mediate nuclear import of GFP. A virus lacking this NLS replicated to titers reduced by 1000-fold, but was able to

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