Project description:In order to understand the molecular mechanisms underlying the regulatory activities of UBR5 and CDC73 in dovitinib-induced apoptosis in 4T1 tumor cells that were Dox-silenced for the expression of Ubr5, Cdc73, or both and treated with dovitinib.
Project description:This SuperSeries is composed of the following subset Series: GSE19220: Expression data from TKI258 treated 4T1 cells GSE19221: Expression data from TKI258 treated 4T1 tumors Refer to individual Series
Project description:Investigation of whole genome gene expression level changes in zebrafish TIF1g-deficient, cdc73 deficient and double-deficient embryos, compared to the wild-type ebryos. A twelve-chip study using total RNA isolated from gata1-GFP positive cells (sorted by FACS) from 12 somite-stage wild type embryos, TIF1g morholino injected, Cdc73 morpholino injected and double morpholino injected embryos.
Project description:RIG-I like receptors (RLRs) are the major viral RNA sensors essential for the initiation of antiviral immune responses to numerous RNA viruses. RLRs are subjected to stringent transcriptional and posttranslational regulations, of which ubiquitination is one of the most important. However, the role of ubiquitination in RLR transcription is unknown. Here, we generated, screened 375 definite ubiquitin ligase knockout cell lines and identified UBR5 as a positive regulator of RLR transcription. UBR5 deficiency (UBR5-/-) reduced antiviral immune responses to RNA viruses, while increased viral replication in primary cells and mice. Ubr5-/- mice were more susceptible to lethal RNA virus infection than Ubr5+/+ littermates. Mechanistically, UBR5 mediated the Lysine 63-linked ubiquitination of TRIM28, an epigenetic repressor of RLRs. This modification prevented intramolecular SUMOylation of TRIM28, thus disengaged the TRIM28-imposed brake on RLR transcription. In sum, UBR5 enables rapid upregulation of RLR expression to boost antiviral immune responses by ubiquitinating and de-SUMOylating TRIM28.
Project description:RIG-I like receptors (RLRs) are the major viral RNA sensors essential for the initiation of antiviral immune responses to numerous RNA viruses. RLRs are subjected to stringent transcriptional and posttranslational regulations, of which ubiquitination is one of the most important. However, the role of ubiquitination in RLR transcription is unknown. Here, we generated, screened 375 definite ubiquitin ligase knockout cell lines and identified UBR5 as a positive regulator of RLR transcription. UBR5 deficiency (UBR5-/-) reduced antiviral immune responses to RNA viruses, while increased viral replication in primary cells and mice. Ubr5-/- mice were more susceptible to lethal RNA virus infection than Ubr5+/+ littermates. Mechanistically, UBR5 mediated the Lysine 63-linked ubiquitination of TRIM28, an epigenetic repressor of RLRs. This modification prevented intramolecular SUMOylation of TRIM28, thus disengaged the TRIM28-imposed brake on RLR transcription. In sum, UBR5 enables rapid upregulation of RLR expression to boost antiviral immune responses by ubiquitinating and de-SUMOylating TRIM28.
Project description:RIG-I like receptors (RLRs) are the major viral RNA sensors essential for the initiation of antiviral immune responses to numerous RNA viruses. RLRs are subjected to stringent transcriptional and posttranslational regulations, of which ubiquitination is one of the most important. However, the role of ubiquitination in RLR transcription is unknown. Here, we generated, screened 375 definite ubiquitin ligase knockout cell lines and identified UBR5 as a positive regulator of RLR transcription. UBR5 deficiency (UBR5-/-) reduced antiviral immune responses to RNA viruses, while increased viral replication in primary cells and mice. Ubr5-/- mice were more susceptible to lethal RNA virus infection than Ubr5+/+ littermates. Mechanistically, UBR5 mediated the Lysine 63-linked ubiquitination of TRIM28, an epigenetic repressor of RLRs. This modification prevented intramolecular SUMOylation of TRIM28, thus disengaged the TRIM28-imposed brake on RLR transcription. In sum, UBR5 enables rapid upregulation of RLR expression to boost antiviral immune responses by ubiquitinating and de-SUMOylating TRIM28.
Project description:Twist1 variants including wildtype Twist1, a non-phosphorylatable mutant Twist1/S42A and a phospho-mimicking mutant Twist1/S42D were expressed in 4T1 cells in which the endogenous Twist1 was depleted. We wanted to use microarray analysis to evaluate those genes that are differentially regulated by Twist1 variants. All cell lines were grown to 70% confluency and total RNA was isolated with Qiagen kit. Each sample was prepared as triplicates. Parental 4T1 cells were used as control.