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Articles 31 - 32 of 32
Full-Text Articles in Virology
Characterization Of A Monothiol Glutaredoxin Encoded By Chlorella Virus Pbcv-1, Lisa A. Fitzgerald, Yuanzheng Zhang, Gentry L. Lewis, James L. Van Etten
Characterization Of A Monothiol Glutaredoxin Encoded By Chlorella Virus Pbcv-1, Lisa A. Fitzgerald, Yuanzheng Zhang, Gentry L. Lewis, James L. Van Etten
Nebraska Center for Virology: Faculty Publications
Annotation of the 330-kb Chlorella virus PBCV-1 genome identified a 237 nucleotide gene (a438l) that codes for a protein with ~35% amino acid identity to glutaredoxins (Grx) found in other organisms. The PBCV-1 protein resembles classical Grxs in both size (9 kDa) and location of the active site (N-terminus). However, the PBCV-1 Grx is unusual because it contains a monothiol active site (CPYS) rather than the typical dithiol active site (CPYC). To examine this unique active site, four sitespecific mutants (CPYC, CPYA, SPYC, and SPYS) were constructed to determine if the N-terminal cysteine is necessary for enzyme activity. …
The Zinc Finger Dna-Binding Domain Of K-Rbp Plays An Important Role In Regulating Kaposi’S Sarcoma-Associated Herpesvirus Rta-Mediated Gene Expression, Zhilong Yang, Hui-Ju Wen, Veenu Minhas, Charles Wood
The Zinc Finger Dna-Binding Domain Of K-Rbp Plays An Important Role In Regulating Kaposi’S Sarcoma-Associated Herpesvirus Rta-Mediated Gene Expression, Zhilong Yang, Hui-Ju Wen, Veenu Minhas, Charles Wood
Nebraska Center for Virology: Faculty Publications
K-RBP is a KRAB-containing zinc finger protein with multiple zinc finger motifs and represses Kaposi’s sarcoma-associated herpesvirus (KSHV) transactivator RTA-mediated transactivation of several viral lytic gene promoters, including the ORF57 promoter. Whether K-RBP binds DNA through its zinc fingers and the role of zinc finger domain in repressing gene expression are unclear. Here we report that K-RBP binds DNA through its zinc finger domain and the target DNA sequences contain high GC content. Furthermore, K-RBP binds to KSHV ORF57 promoter, which contains a GC-rich motif. K-RBP suppresses the basal ORF57 promoter activity as well as RTA-mediated activation. The zinc finger …