Figure 2. The relationship between the protein concentration of lysates from Jurkat cells, treated with LY294002 (as control) or calyculin A/pervanadate, and the absorbance at 450 nm using the PathScan® Phospho-YB1 (Ser102) Sandwich ELISA Kit is shown.Learn more about how we get our images
Figure 1. Treatment of Jurkat cells with calyculin A and pervanadate stimulates phosphorylation of YB1 at Ser102, detected by the PathScan® Phospho-YB1 (Ser102) Sandwich ELISA Kit #7249, but does not affect the levels of total YB1 detected by western. Jurkat cells were treated with 50 μM LY294002 (as control), or 100 nM calyculin A and 1 mM pervanadate for 30 minutes and lysed. The absorbance readings at 450 nm are shown in the upper figure, while the corresponding western blots using YB1 (D299) Antibody #4202 (left panel) or Phospho-YB1 (Ser102) (C34A2) Rabbit mAb #2900 (right panel) are shown in the lower figure.Learn more about how we get our images
|Product Includes||Volume||Solution Color|
|YB1 Rabbit mAb Coated Microwells||96 tests|
|Phospho-YB1 (Ser102) Mouse Detection mAb||1 ea||Green (Lyophilized)|
|Anti-mouse IgG, HRP-linked Antibody (ELISA Formulated)||1 ea||Red (Lyophilized)|
|Detection Antibody Diluent||11 ml||Green|
|HRP Diluent||11 ml||Red|
|TMB Substrate 7004||11 ml|
|STOP Solution 7002||11 ml|
|Sealing Tape||2 ea|
|ELISA Sample Diluent||25 ml||Blue|
|ELISA Wash Buffer (20X)||25 ml|
|Cell Lysis Buffer (10X) 9803||15 ml|
NOTE: Prepare solutions with purified water.
*NOTE: Some PathScan® ELISA Kits may include HRP-Linked Streptavidin in place of HRP-Linked Antibody.
NOTE: Initial color of positive reaction is blue, which changes to yellow upon addition of STOP Solution.
posted November 2013
The PathScan® Phospho-YB1 (Ser102) Sandwich ELISA Kit is a solid phase sandwich enzyme-linked immunosorbent assay (ELISA) that detects endogenous levels of YB1 when phosphorylated at Ser102. A YB1 rabbit antibody has been coated onto the microwells. After incubation with cell lysates, YB1 protein is captured by the coated antibody. Following extensive washing, a phospho-YB1 (Ser102) mouse detection antibody is added to detect the captured phospho-YB1 (Ser102) protein. Anti-mouse IgG, HRP-linked antibody is then used to recognize the bound detection antibody. HRP substrate, TMB, is added to develop color. The magnitude of the absorbance for the developed color is proportional to the quantity of YB1 phosphorylated at Ser102.
Antibodies in kit are custom formulations specific to kit.
PathScan® Phospho-YB1 (Ser102) Sandwich ELISA Kit #7249 detects endogenous levels of YB1 protein when phosphorylated at Ser102 as shown in Figure 1. Kit sensitivity is shown in Figure 2. This kit detects proteins from the indicated species, as determined through in-house testing, but may also detect homologous proteins from other species.
The Y-box binding protein 1 (YB1) belongs to a family of evolutionarily conserved, multifunctional Y-box proteins that bind single-stranded DNA and RNA and function as regulators of transcription, RNA metabolism, and protein synthesis (1). YB1 binds to Y-box sequences (TAACC) found in multiple gene promoters and can positively or negatively regulate transcription. YB1 activates genes associated with proliferation and cancer, such as cyclin A, cyclin B1, matrix metalloproteinase-2 (MMP-2), and the multi-drug resistance 1 (MDR1) gene (2-4). YB1 represses genes associated with cell death, including the Fas cell death-associated receptor and the p53 tumor suppressor gene (5-7). It also interacts with the RNA-splicing factor SRp30c and stabilizes interleukin-2 (IL-2) mRNA upon induction of T lymphocytes by IL-2 (8,9). The majority of YB1 protein localizes to the cytoplasm, with a minor pool found in the nucleus; however, nuclear localization appears to be critical for its role in promoting proliferation. Nuclear translocation is cell cycle regulated, with YB1 protein accumulating in the nucleus during G1/S phase (2). In addition, nuclear translocation is induced in response to extracellular stimuli such as hyperthermia and UV irradiation, or treatment of cells with thrombin, interferons, or insulin-like growth factor (IGF-I) (2,10). Treatment of the MCF7 breast cancer cell line with IGF-I results in Akt-mediated phosphorylation of YB1 at Ser102, which is required for nuclear translocation of YB1 and its ability to promote anchorage-independent growth (10). Research studies have shown that YB1 is overexpressed in many malignant tissues, including breast cancer, non-small cell lung carcinoma, ovarian adenocarcinomas, human osteosarcomas, colorectal carcinomas, and malignant melanomas. Investigators have shown that nuclear YB1 expression correlates with high levels of proliferation, drug resistance, and poor tumor prognosis (2,7,10).
Cell Signaling Technology is a trademark of Cell Signaling Technology, Inc. PathScan is a trademark of Cell Signaling Technology, Inc.
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|7249C||1 Kit (96 assays)||$489.00.0|