Recombinant Human Cripto-1 Protein

Carrier Free

Catalog # Availability Size / Price Qty
145-CR-010/CF

With Carrier

Catalog # Availability Size / Price Qty
145-CR-010
R&D Systems Recombinant Proteins and Enzymes
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Citations (2)
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Recombinant Human Cripto-1 Protein Summary

Product Specifications

Purity
>95%, by SDS-PAGE visualized with Silver Staining and quantitative densitometry by Coomassie® Blue Staining.
Endotoxin Level
<0.10 EU per 1 μg of the protein by the LAL method.
Activity
Measured by its binding ability in a functional ELISA. Immobilized Recombinant Human Activin RIB/ALK‑4 Fc Chimera (Catalog # 808-AR) at 2 µg/mL (100 µL/well) can bind Recombinant Human Cripto-1 with a linear range of 0.8-100 ng/mL.
Source
Spodoptera frugiperda, Sf 21 (baculovirus)-derived human Cripto protein
Leu31-Thr172 & Ser63-Thr172
Accession #
N-terminal Sequence
Analysis
Leu31 & Ser63
Predicted Molecular Mass
16 kDa & 13 kDa
SDS-PAGE
12-20 kDa, reducing conditions

Product Datasheets

145-CR (with carrier)

145-CR/CF (carrier free)

Carrier Free

What does CF mean?

CF stands for Carrier Free (CF). We typically add Bovine Serum Albumin (BSA) as a carrier protein to our recombinant proteins. Adding a carrier protein enhances protein stability, increases shelf-life, and allows the recombinant protein to be stored at a more dilute concentration. The carrier free version does not contain BSA.

What formulation is right for me?

In general, we advise purchasing the recombinant protein with BSA for use in cell or tissue culture, or as an ELISA standard. In contrast, the carrier free protein is recommended for applications, in which the presence of BSA could interfere.

145-CR

Formulation Lyophilized from a 0.2 μm filtered solution in PBS with BSA as a carrier protein.
Reconstitution Reconstitute at 10 μg/mL in sterile PBS containing at least 0.1% human or bovine serum albumin.
Shipping The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below.
Stability & Storage: 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.

145-CR/CF

Formulation Lyophilized from a 0.2 μm filtered solution in PBS.
Reconstitution Reconstitute at 100 μg/mL in sterile PBS.
Shipping The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below.
Stability & Storage: 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.
Reconstitution Calculator

Reconstitution Calculator

The reconstitution calculator allows you to quickly calculate the volume of a reagent to reconstitute your vial. Simply enter the mass of reagent and the target concentration and the calculator will determine the rest.

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Background: Cripto

Cripto is the founding member of the epidermal growth factor-CriptoFRL1Cryptic (EGF-CFC) family of signaling proteins that function in cancer and various developmental processes. These developmental processes include: formation of the germ layers and dorsal organizer, specification of anterior-posterior and left-right axes, and differentiation of heart muscle (1, 2). Other members of the EGF-CFC family include Cryptic, Xenopus FRL-1 and zebrafish OEP (one-eyed pinhead). Overall sequence identity between members of the family is low, but they do share several common domains: a variant EGF-like motif, a novel conserved cysteine-rich domain (called CFC domain), and a C-terminal hydrophobic region. Most EGF-CFC members have a glycosyl-phosphatidylinositol (GPI) anchoring site at the
C-terminus and exist as extracellular membrane-anchored proteins. However, naturally-occurring soluble isoforms also exist. Human Cripto shares 66% and 28% amino acid identity with mouse Cripto and zebrafish OEP, respectively (2). Despite weak conservation in amino acid identity, EGF-CFC family members appear to function similarly in assays for phenotypic rescue of zebrafish oep mutants (2). Both secreted and membrane bound forms of Cripto demonstrate biological activity (3).

Cripto, also known as CFC-2 or TDGF-1 (teratocarcinoma-derived growth factor), was originally isolated from an undifferentiated human teratocarcinoma cell line as a potential oncogene. It is overexpressed in many types of cancers and acts as a growth factor for tumors (4). Genetic evidence from mice and zebrafish points to a role for Cripto as an essential cofactor in Nodal signaling. Cripto and OEP mutants display defects in mesoderm induction and heart morphogenesis, similar to phenotypes seen in Nodal mutants (2).

Cripto acts as a cofactor for Nodal by recruiting the Activin type I Receptor, ALK-4, leading to an Act RIIB-ALK4-Cripto-Nodal complex for signaling (1, 3). Cripto also forms a complex with activin and Act RIIs to block activin signaling (5). Studies have shown that other TGF-beta superfamily members such as Vg1 and GDF-1 also require EGF-CFC cofactors (6). Cripto can also activate mitogen-activated protein kinase (MAPK) and Akt pathways independently of Nodal by directly binding to a membrane-associated heparan sulfate proteoglycan, glypican-1 (7).

References
  1. Rosa, F.M. (2002) Science’s STKE http://stke.sciencemag.org/.
  2. Shen, M. and A. Schier (2000) Trends Genet. 16:303.
  3. Yan, Y-T. et al. (2002) Mol. Cell Biol. 22:4439.
  4. Salomon, D. et al. (2000) Endocrine-Rel. Cancer 7:199.
  5. Gray, P.C. et al. (2003) Proc. Natl. Acad. Sci. USA 100:5193.
  6. Cheng, S. et al. (2003) Genes & Dev. 17:31.
  7. Bianco, C. et al. (2003) Cancer Research 63:1192.
Long Name
Teratocarcinoma-derived Growth Factor/Cripto Growth Factor
Entrez Gene IDs
6997 (Human); 21667 (Mouse)
Alternate Names
CFC-2; CR; Cripto; Cripto-1 growth factor; Cripto-1; CRIPTOCRGF; Epidermal growth factor-like cripto protein CR1; TDGF1; TDGF-1; teratocarcinoma-derived growth factor 1

Citations for Recombinant Human Cripto-1 Protein

R&D Systems personnel manually curate a database that contains references using R&D Systems products. The data collected includes not only links to publications in PubMed, but also provides information about sample types, species, and experimental conditions.

2 Citations: Showing 1 - 2
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  1. Autoregulation and heterogeneity in expression of human Cripto-1.
    Authors: Loying, Pojul, Manhas, Janvie, Sen, Sudip, Bose, Biplab
    PLoS ONE, 2015;10(2):e0116748.
    Species: Human
    Sample Types: Whole Cells
    Applications: Bioassay
  2. Growth factor induction of Cripto-1 shedding by glycosylphosphatidylinositol-phospholipase D and enhancement of endothelial cell migration.
    Authors: Watanabe K, Bianco C, Strizzi L, Hamada S, Mancino M, Bailly V, Mo W, Wen D, Miatkowski K, Gonzales M, Sanicola M, Seno M, Salomon DS
    J. Biol. Chem., 2007;282(43):31643-55.
    Species: N/A
    Sample Types: N/A
    Applications: ELISA (Standard)

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