English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/39039
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:


Identification of Residues within Two Regions Involved in Self-association of Viral Histone-like Protein p6 from Phage Ø29

AuthorsAbril, Ana M.; Salas, Margarita ; Hermoso, José Miguel
Issue Date26-May-2000
PublisherAmerican Society for Biochemistry and Molecular Biology
CitationJournal of Biological Chemistry 275: 26404-26410 (2000)
AbstractProtein p6 of Bacillus subtilis phage Ø29 is involved in the initiation of viral DNA replication and transcription by forming a multimeric nucleoprotein complex with the phage DNA. Based on this, together with its abundance and its capacity to bind to the whole viral genome, it has been proposed to be a viral histone-like protein. Protein p6 is in a monomer-dimer-oligomer equilibrium association. We have identified protein p6 mutants deficient in self-association by testing random mutants obtained by degenerated polymerase chain reaction in an in vivo assay for dimer formation. The mutations were mainly clustered in two regions located at the N terminus, and the central part of the protein. Site-directed single mutants, corresponding to those found in vivo, have been constructed and purified. Mutant p6A44V, located at the central part of the protein, showed an impaired dimer formation ability, and a reduced capacity to bind DNA and to activate the initiation of Ø29 DNA replication. Mutant p6I8T has at least 10-fold reduced self-association capacity, does not bind DNA nor activate Ø29 DNA initiation of replication. C-terminal deletion mutants showed an enhanced dimer formation capacity. The highly acidic tail, removed in these mutants, is proposed to modulate the protein p6 self-association.
Publisher version (URL)http://dx.doi.org/10.1074/jbc.M002739200
Appears in Collections:(CBM) Artículos
Files in This Item:
There are no files associated with this item.
Show full item record
Review this work

Related articles:

WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.