Peer-Reviewed Journal Details
Mandatory Fields
Taneja, P,Nasheuer, HP,Hartmann, H,Grosse, F,Fanning, E,Weisshart, K
2007
October
Biochemical Journal
Timed interactions between viral and cellular replication factors during the initiation of SV40 in vitro DNA replication
Published
()
Optional Fields
DNA polymerase alpha-primase (Pol) large T-antigen protein-protein interaction replication protein A simian virus 40 DNA replication (SV40 DNA replication) POLYMERASE-ALPHA-PRIMASE LARGE T-ANTIGEN PROTEIN-PROTEIN INTERACTIONS TOPOISOMERASE-I FUNCTIONAL INTERACTIONS MONOCLONAL-ANTIBODIES PRIMER SYNTHESIS ORIGIN DNA A BINDING COMPLEX
407
313
320
The initiation of SV40 (simian virus 40) DNA replication requires the co-operative interactions between the viral Tag (large T-antigen), RPA (replication protein A) and Pol (DNA polymerase alpha-primase) on the template DNA. Binding interfaces mapped on these enzymes and expressed as peptides competed with the mutual interactions of the native proteins. Prevention of the genuine interactions was accomplished only prior to the primer synthesis step and blocked the assembly of a productive initiation complex. Once the complex was engaged in the synthesis of an RNA primer and its extension, the interfering effects of the peptides ceased, suggesting a stable association of the replication factors during the initiation phase. Specific antibodies were still able to disrupt preformed interactions and inhibited primer synthesis and extension activities, underlining the crucial role of specific protein-protein contacts during the entire initiation process.
DOI 10.1042/BJ20070794
Grant Details
Publication Themes