title: Protein encoded by HSV-1 stimulation-related gene 1 (HSRG1) interacts with and inhibits SV40 large T antigen.
abstract: Herpes simplex virus (HSV)-1 stimulation-related gene 1 (HSRG1) protein expression is induced in HSV-1 infected cells. We found that HSRG1 interacts with SV40 large T antigen (LT) in yeast two-hybrid assay and bimolecular fluorescence complementation (BiFC) assay. This interaction alters LT's regulation of the SV40 promoter and its ability to influence the cell cycle. Choramphenicol acetyl-transferase (CAT) assays revealed that initiation of gene transcription by LT is changed by HSRG1 expression. HSRG1 inhibits the ability of LT to activate SV40 late gene transcription. Further data indicate that the ability of LT protein to stimulate S-phase entry is also inhibited by the expression of HSRG1. The results of a colony-forming assay suggested that expression of HSRG1 in cells transfected by LT gene decreased the rate of colony formation. Yeast two-hybrid beta-galactosidase assay revealed that amino acid residues 132-450 in LT bind HSRG1.
authors.affiliation: Institute of Medical Biology, Chinese Academy of Medical Sciences, Kunming, 650118, China.
authors.forename: H X
authors.initials: HX
authors.lastname: Guo
authors.forename: W
authors.initials: W
authors.lastname: Cun
authors.forename: L D
authors.initials: LD
authors.lastname: Liu
authors.forename: S Z
authors.initials: SZ
authors.lastname: Dong
authors.forename: L C
authors.initials: LC
authors.lastname: Wang
authors.forename: C H
authors.initials: CH
authors.lastname: Dong
authors.forename: Q H
authors.initials: QH
authors.lastname: Li
mesh_terms: D000818:Animals; D000952:Antigens, Polyomavirus Transforming / Q000235:genetics* / Q000378:metabolism*; D002455:Cell Division; D002522:Chlorocebus aethiops; D005347:Fibroblasts / Q000166:cytology / Q000502:physiology; D006801:Humans; D047908:Intracellular Signaling Peptides and Proteins; D011401:Promoter Regions, Genetic / Q000502:physiology; D025941:Protein Interaction Mapping; D011506:Proteins / Q000378:metabolism*; D016196:S Phase; D013539:Simian virus 40 / Q000235:genetics; D014158:Transcription, Genetic; D014162:Transfection; D020798:Two-Hybrid System Techniques; D014709:Vero Cells
chemical_list: D000952:Antigens, Polyomavirus Transforming; D047908:Intracellular Signaling Peptides and Proteins; C477373:MON1B protein, human; D011506:Proteins