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The adenovirus type 5 E1b 55K and E4 Orf3 proteins associate in infected cells and affect ND10 components

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UNSPECIFIED (1999) The adenovirus type 5 E1b 55K and E4 Orf3 proteins associate in infected cells and affect ND10 components. JOURNAL OF GENERAL VIROLOGY, 80 (Part 4). pp. 997-1008. ISSN 0022-1317.

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Abstract

Three early proteins expressed by adenovirus type 5, E1b 55K, E4 OrF3 and E4 Orf6, are involved in regulating late viral gene expression. It has previously been shown that 55K associates with Orf6, Here we show that 55K also associates with Orf3 and that this interaction is necessary for 55K to localize to the nuclear matrix fraction of the cell. From our data, we infer that the OrF3 and Orf6 interactions with 55K may be mutually exclusive. The Orf3 protein is also known to associate with and cause the reorganization of cell nucleus structures known as ND10 or PODs. Consistent with the observed increase in the biochemical interaction between 55K and Orf3 in the absence of Orf6, the 55K association with Orf3 in ND10 was also found to increase in the absence of Orf6. The most studied cellular component of ND10 is PML, a complex protein present in a range of isoforms, some of which are modified by conjugation to the small ubiquitin-like protein PIC-1. The pattern of PML isoforms was altered in adenovirus-infected cells, in that a number of additional isoform bands appeared in an Orf3-dependent manner, one of which became predominant later in infection. As for ND10 reorganization, neither Orf6 nor 55K was required for this effect. Therefore it is likely that these changes in PML are related to the changes in ND10 structure that occur during infection.

Item Type: Journal Article
Subjects: T Technology > TP Chemical technology
Q Science > QR Microbiology > QR355 Virology
Journal or Publication Title: JOURNAL OF GENERAL VIROLOGY
Publisher: SOC GENERAL MICROBIOLOGY
ISSN: 0022-1317
Official Date: April 1999
Dates:
DateEvent
April 1999UNSPECIFIED
Volume: 80
Number: Part 4
Number of Pages: 12
Page Range: pp. 997-1008
Publication Status: Published

Data sourced from Thomson Reuters' Web of Knowledge

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