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  3. PathScan® Total ROS1 Sandwich ELISA Kit

PathScan® Total ROS1 Sandwich ELISA Kit #7091

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  • ELISA

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    Supporting Data

    REACTIVITY H
    Application Key:
    • ELISA-ELISA 
    Species Cross-Reactivity Key:
    • H-Human 

    Product Information

    Product Description

    The PathScan® Total ROS1 Sandwich ELISA Kit is a solid phase sandwich enzyme-linked immunosorbent assay (ELISA) that detects endogenous levels of ROS1 protein. A ROS1 mouse antibody has been coated onto the microwells. After incubation with cell lysates, ROS1 protein (phospho and nonphospho) is captured by the coated antibody. Following extensive washing, a ROS1 rabbit detection antibody is added to detect captured ROS1 protein. Anti-rabbit 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 this developed color is proportional to the quantity of ROS1 protein.

    *Antibodies in this kit are custom formulations specific to kit.

    Protocol

    Specificity / Sensitivity

    PathScan® Total ROS1 Sandwich ELISA Kit #7091 detects endogenous levels of ROS1 protein in human cells, as shown in Figure 1. The 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.

    Species Reactivity:

    Human

    Background

    ROS1, an orphan receptor tyrosine kinase of the insulin receptor family, was initially identified as a homolog of v-ros from the UR2 sarcoma virus (1). ROS1 consists of a large extracellular domain that is composed of six fibronectin repeats, a transmembrane domain, and a C-terminal kinase domain. Being an orphan receptor, the functions of ROS1 are not well known, though it has been shown to play an important role in differentiation of epididymal epithelium (2). The first oncogenic fusion of ROS1, FIG-ROS1, was initially identified by research studies in glioblastoma (3), and subsequent studies have found this fusion in cholangiocarcinoma (4), ovarian cancer (5), and non-small cell lung cancer (NSCLC) (6). Investigators have found additional oncogenic ROS1 fusion proteins in NSCLC (at a frequency of ~1.6%), where the ROS1 kinase domain is fused to the amino-terminal region of several different proteins, including CD74 and SLC34A2 (6-8). ROS1 fusion proteins activate the SHP-2 phosphatase, PI3K/Akt/mTOR, Erk, and Stat3 pathways (3,4,9). There are two autophosphorylation sites (Tyr2274, Tyr2334) downstream of the kinase domain of ROS1, either of which may serve as biomarkers of ROS1 kinase activity, including that of ROS1 fusion proteins (10).

    Alternate Names

    elisa; ros; screening

    Database Links

    UniProt ID: P08922


    Entrez-Gene Id: 6098


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    For Research Use Only. Not for Use in Diagnostic Procedures.
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