Project description:Serial Capture Affinity Purification (SCAP) samples analyzed using Multidimentional Protein identification Technology (MudPIT) on Orbitrap Velos Elite. Baits are SNAP-SPIN1 and Halo-WDR76. SNAP purification was performed first, then Halo purification was performed. SCAP was performed using whole cell extract from a stable cell line of 293FRT cells in WDR76 KO background. 3 biological replicates of E1, UB2 and E2 fractions.
Project description:SCAP-XL of Halo-WDR76 and SNAP-SPIN1 from stable cell line in WDR76 KO background. Serial Capture Affinity Purification (SCAP) was performed on whole cell extract of a stable cell line of 293FRT cells in WDR76 KO background. DSSO crosslinked in E2 sample. Data was acquired using a ms1/ms2/ms3 method. Data was searched using Proteomics Discoverer 2.4 with XlinkX.
Project description:Halo purification samples analyzed using Multidimentional Protein identification Technology (MudPIT) on Orbitrap Velos Elite. Baits are Halo-WDR76, Halo-SPIN1, Halo-CBX5. The bait for Control Purification is Halo tag only. Purification for each bait was performed using whole cell extract from a stable cell line in 293FRT cells. 3 biological replicates for each type of bait.
Project description:Ubiquitin and ubiquitin-like proteins (UBLs) are directed to targets by cascades of E1, E2, and E3 enzymes. The largest ubiquitin E3 subclass consists of cullin-RING ligases (CRLs), which contain one each of several cullins (CUL1, -2, -3, -4, or -5) and RING proteins (RBX1 or -2). CRLs are activated by ligation of the UBL NEDD8 to a conserved cullin lysine. How is cullin NEDD8ylation specificity established? Here we report that, like UBE2M (also known as UBC12), the previously uncharacterized E2 UBE2F is a NEDD8-conjugating enzyme in vitro and in vivo. Biochemical and structural analyses indicate how plasticity of hydrophobic E1-E2 interactions and E1 conformational flexibility allow one E1 to charge multiple E2s. The E2s have distinct functions, with UBE2M/RBX1 and UBE2F/RBX2 displaying different target cullin specificities. Together, these studies reveal the molecular basis for and functional importance of hierarchical expansion of the NEDD8 conjugation system in establishing selective CRL activation. Mol Cell 33:483-495, 2009. Keywords: Comparison of gene expression profiles
Project description:Profiling of bone marrow-derived erythroid progenitor cells at E1 (CFU-e), E2 (proerythroblasts), and E3 (maturing erythroblast) stages of development under stress erythropoiesis conditions and in response to EPO challenge. MACS-isolated E1, E2, and E3 stage EPCs were cultured in SP34ex media for 6 hrs in the absence of hematopoietic growth factors and the presence of insulin (to enforce survival and anti-apoptotic effects) and then exposed to rhEPO for 90 minutes. Gene expression analysis was performed using Affymetrix Mouse Genome 430 2.0 arrays; microarray data were analyzed using Bioconductor for R.