Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/39552
COMPARTIR / EXPORTAR:
logo share SHARE BASE
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE

Invitar a revisión por pares abierta
Título

Assembly of phage phi 29 genome with viral protein p6 into a compact complex

AutorGutiérrez Armenta, Crisanto CSIC ORCID; Freire, Raimundo CSIC ORCID; Salas, Margarita CSIC ORCID ; Hermoso, José Miguel
Palabras claveElectron microscopy/
Histone-like proteins
Nucleoprotein complex
Phage φ29
Fecha de publicación1-ene-1994
EditorNature Publishing Group
CitaciónEmbo Journal 13(1):269-276 (1994)
ResumenThe formation of a multimeric nucleoprotein complex by the phage phi 29 dsDNA binding protein p6 at the phi 29 DNA replication origins, leads to activation of viral DNA replication. In the present study, we have analysed protein p6-DNA complexes formed in vitro along the 19.3 kb phi 29 genome by electron microscopy and micrococcal nuclease digestion, and estimated binding parameters. Under conditions that greatly favour protein-DNA interaction, the saturated phi 29 DNA-protein p6 complex appears as a rigid, rod-like, homogeneous structure. Complex formation was analysed also by a psoralen crosslinking procedure that did not disrupt complexes. The whole phi 29 genome appears, under saturating conditions, as an irregularly spaced array of complexes approximately 200-300 bp long; however, the size of these complexes varies from approximately 2 kb to 130 bp. The minimal size of the complexes, confirmed by micrococcal nuclease digestion, probably reflects a structural requirement for stability. The values obtained for the affinity constant (K(eff) approximately 10(5) M-1) and the cooperativity parameter (omega approximately 100) indicate that the complex is highly dynamic. These results, together with the high abundance of protein p6 in infected cells, lead us to propose that protein p6-DNA complexes could have, at least at some stages, during infection, a structural role in the organization of the phi 29 genome into a nucleoid-type, compact nucleoprotein complex.
DescripciónPMID:8306969
Versión del editorhttp://www.ncbi.nlm.nih.gov/pmc/articles/pmid/8306969/?tool=pubmed
URIhttp://hdl.handle.net/10261/39552
ISSN0261-4189
E-ISSN1460-2075
Aparece en las colecciones: (CBM) Artículos

Mostrar el registro completo

CORE Recommender

Page view(s)

287
checked on 19-mar-2024

Google ScholarTM

Check


NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.