What is the function of the T antigen of SV40 viral vectors?
The large and small tumor antigens (T antigens) are the major regulatory proteins encoded by SV40. Large T antigen is responsible for both viral and cellular transcriptional regulation, virion assembly, viral DNA replication, and alteration of the cell cycle.
What is SV40 ori?
General description. A versatile cloning vector for the expression of genes in mammalian cells. This vector also contains the origin of replication from Simian Virus 40 (SV40) which enables it to be replicated in cells that express the SV40 large T antigen (such as 293T cells).
What is SV40 in a plasmid?
PSF-SV40 – SV40 PROMOTER PLASMID contains the Simian Virus 40 promoter upstream of the multiple cloning site (MCS) for expression in mammalian cells. Transcription termination is mediated by the SV40 poly-adenylation signals downstream of the MCS.
What is the approximate MW of the SV40 large T antigen?
In view of the strong theoretical basis for the guanidine method and the agreement with the sedimentation data, these findings suggest that the molecular weight of this protein is approximately 75 to 80K as opposed to 94 to 100K and, therefore, that considerably less than the entire early region of simian virus 40 is …
What does small T antigen do?
Small t antigen also activates the transcription of cellular genes, including cyclinD and cyclinA. Small t antigen-mediated activation of cyclinD transcription is indirect and requires small t antigen interaction with the cellular phosphatase pp2A.
What does SV40 stand for?
Simian virus 40 (SV40) is a small DNA tumor virus of monkey origin. This polyomavirus was administered to human populations mainly through contaminated polio vaccines, which were produced in naturally infected SV40 monkey cells.
How is SV40 transmitted?
Recent molecular biology and epidemiological studies suggest that SV40 may be contagiously transmitted in humans by horizontal infection, independently from the earlier administration of SV40-contaminated vaccines.
Where is SV40 from?
SV40 was isolated from normal monkey kidney cells, stocks of the Sabin poliovirus vaccine, and an adenovirus vaccine. The last two reagents were prepared in primary kidney cell cultures derived from rhesus monkeys.
What kind of virus is SV40?
The polyomavirus simian virus 40 (SV40) is a known oncogenic DNA virus which induces primary brain and bone cancers, malignant mesothelioma, and lymphomas in laboratory animals. Persuasive evidence now indicates that SV40 is causing infections in humans today and represents an emerging pathogen.
Can you be tested for SV40?
SV40 detection by PCR is the most rapid, sensitive and specific method for the diagnosis of this infection. The method can also differentiate the virus from other closely related polyomaviruses.