Recombinant Human Mesothelin (aa 296-580) His Protein, CF Summary
Additional Information
C-Terminal
Details of Functionality
Measured by its binding ability in a functional ELISA. When Recombinant Human CA125/MUC16
(Catalog #
5609-MU)
is coated at 2 μg/mL (100 μL/well), the concentration of Recombinant Human Mesothelin C-Terminal (aa 296-580) His-tag that produces 50% of the optimal binding response is found to be approximately 0.5-2.5 μg/mL.
Source
Mouse myeloma cell line, NS0-derived human Mesothelin protein Glu296-Gly580, with a C-terminal 6-His tag
>95%, by SDS-PAGE visualized with Silver Staining and quantitative densitometry by Coomassie® Blue Staining.
Endotoxin Note
<0.10 EU per 1 μg of the protein by the LAL method.
Applications/Dilutions
Dilutions
Bioactivity
Theoretical MW
33 kDa. Disclaimer note: The observed molecular weight of the protein may vary from the listed predicted molecular weight due to post translational modifications, post translation cleavages, relative charges, and other experimental factors.
SDS-PAGE
40-45 kDa, reducing conditions
Publications
Read Publications using 3265-MS in the following applications:
Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
12 months from date of receipt, -20 to -70 °C as supplied.
1 month, 2 to 8 °C under sterile conditions after reconstitution.
3 months, -20 to -70 °C under sterile conditions after reconstitution.
Buffer
Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose.
Purity
>95%, by SDS-PAGE visualized with Silver Staining and quantitative densitometry by Coomassie® Blue Staining.
Reconstitution Instructions
Reconstitute at 100 μg/mL in PBS.
Notes
This product is produced by and ships from R&D Systems, Inc., a Bio-Techne brand.
Alternate Names for Recombinant Human Mesothelin (aa 296-580) His Protein, CF
CAK1 antigen
CAK1
megakaryocyte potentiating factor
Mesothelin
MPF
MPFSMRP
MSLN
Pre-pro-megakaryocyte-potentiating factor
SMR
soluble MPF mesothelin related protein
Background
Mesothelin, also known as CAK1 and ERC, is derived from a 70 kDa precursor that also includes Megakaryocyte Potentiating Factor (MPF) (1-3). The 70 kDa precursor is expressed on the cell surface where it is cleaved at a dibasic proteolytic site to release the 32 kDa glycosylated MPF (3, 4). MPF is a cytokine that potentiates IL-3 induced megakaryocyte colony formation (2, 5). The term Mesothelin refers to the 40 kDa glycosylated protein which remains attached to the cell surface via a GPI linkage. Alternate splicing generates additional Mesothelin isoforms that have either an eight amino acid insertion following Ser408 or a substituted C‑terminal region with no GPI anchor (6). This recombinant human Mesothelin lacks the 8 aa insertion, and within aa 296-580 it shares 59% sequence identity with mouse and rat Mesothelin. Mesothelin is normally expressed on mesothelial cells in the pleura, pericardium, and peritoneum as well as in the developing and postnatal pancreas (1, 7). It is up‑regulated in mesotheliomas and a range of carcinomas and adenomas (8 ‑ 11). Mesothelin promotes tumor cell proliferation, migration, anchorage-independent growth, and tumor progression (10, 12). It is coexpressed with the tumor antigen CA125/MUC16 on advanced ovarian adenocarcinomas and interacts with this molecule to support cell adhesion (13). A soluble form of Mesothelin is released from tumor cells into the serum or tissue effusions (11, 14, 15).
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Chang, K. and I. Pastan (1996) Proc. Natl. Acad. Sci. 93:136.
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Yamaguchi, N. et al. (1994) J. Biol. Chem. 269:805.
Muminova, Z.E. et al. (2004) BMC Cancer 4:19.
Hou, L.-Q. et al. (2008) Develop. Growth Differ. 50:531.
Ordonez, N.G. (2003) Mod. Pathol. 16:192.
Argani, P. et al. (2001) Clin. Cancer Res. 7:3862.
Li, M. et al. (2008) Mol. Cancer Ther. 7:286.
Scholler, N. et al. (1999) Proc. Natl. Acad. Sci. 96:11531.
Uehara, N. et al. (2008) Mol. Cancer Res. 6:186.
Rump, A. et al. (2004) J. Biol. Chem. 279:9190.
Ho, M. and M.O. Lively (2006) Cancer Epidemiol. Biomarkers Prev. 15:1751.
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