• Purity

  >95%, by SDS-PAGE visualized with Silver Staining and quantitative densitometry by Coomassie® Blue Staining.

• Endotoxin Level

  <0.01 EU per 1 μg of the protein by the LAL method.  

• Activity

  Measured by its ability to induce alkaline phosphatase production by C3H10T1/2 mouse embryonic fibroblast cells. Nakamura, T.     et al. (1997) Biochem. Biophys. Res. Commun.     237:465. The ED    ₅₀ for this effect is 0.1-0.4 µg/mL.

• Source

  E. coli-derived Cys24-Gly197 (Cys24Ile-Ile), with an N-terminal Met

• Accession #

• N-terminal Sequence    
  Analysis

  Met

• Predicted Molecular Mass

  20 kDa

• SDS-PAGE

  22 kDa, reducing conditions

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.

Data Images

Background: Sonic Hedgehog/Shh

Sonic Hedgehog (Shh) is expressed in embryonic tissues that are critical for the patterning of the developing central nervous system, somite, and limb. It is also involved in whisker, hair, foregut, tooth, and bone development. Shh regulates neural and hematopoietic stem cell fate and is important for thymocyte differentiation and proliferation as well as T cell determination. In adult tissue Shh is associated with cancer development and tissue remodeling following injury (1-3). Human Shh encodes a 462 amino acid (aa) precursor protein that is autocatalytically processed to yield a non-glycosylated 19 kDa N-terminal fragment (Shh-N) and a glycosylated 25 kDa C-terminal protein (Shh-C) (4). Shh-C, which is responsible for the intramolecular processing of Shh, is rapidly degraded following Shh proteolysis (5). Shh-N is highly conserved, sharing >98% aa identity between mouse, human, rat, canine, porcine, and chicken Shh-N. Shh-N can be palmitoylated at its  
N-terminal cysteine and modified by cholesterol addition at its C-terminus (6). These modifications contribute to the membrane tethering of Shh as well as its assembly into various sized multimers (6-9). Lipid modification and multimerization greatly increase Shh-N receptor binding affinity and signaling potency (5, 6, 8, 9). Monomeric and multimeric Shh can be released from the plasma membrane by the cooperative action of DISP1, SCUBE2, and TACE/ADAM17 (10-12). Modifications also extend the effective range of Shh functionality and are required for the development of protein gradients important in tissue morphogenesis (9, 13). Canonical signaling of Shh is mediated by a multicomponent receptor complex that includes Patched (PTCH1, PTCH2) and Smoothened (SMO) (14). The binding of Shh to PTCH releases the basal repression of SMO by PTCH. Shh activity can also be regulated through interactions with heparin, glypicans, and membrane-associated Hip (hedgehog interacting protein) (13, 15, 16).

• References:

1. Briscoe, J. and P.P. Therond (2013) Mol. Cell. Biol. 14:416.

2. Aviles, E.C. et al. (2013) Front. Cell. Neurosci. 7:86.

3. Xie, J. et al. (2013) OncoTargets Ther. 6:1425.

4. Marigo, V. et al. (1995) Genomics 28:44.

5. Zeng, X. et al. (2001) Nature 411:716.

6. Feng, J. et al. (2004) Development 131:4357.

7. Goetz, J.A. et al. (2006) J. Biol. Chem. 281:4087.

8. Pepinsky, R.B. et al. (1998) J. Biol. Chem. 273:14037.

9. Chen, M.-H. et al. (2004) Genes Dev. 18:641.

10. Etheridge, L.A. et al. (2010) Development 137:133.

11. Jakobs, P. et al. (2014) J. Cell Sci. 127:1726.

12. Dierker, T. et al. (2009) J. Biol. Chem. 284:8013.

13. Lewis, P.M. et al. (2001) Cell 105:599.

14. Carpenter, D. et al. (1998) Proc. Natl. Acad. Sci. USA 95:13630.

15. Filmus, J. and M. Capurro (2014) Matrix Biol. 35:248.

16. Chuang, P.-T. and A.P. McMahon (1999) Nature 397:617.

• Entrez Gene IDs:

  6469 (Human); 20423 (Mouse)

• Alternate Names:

  HHG1; HHG-1; HLP3; HPE3; MCOPCB5sonic hedgehog (Drosophila) homolog; Shh; SMMCIsonic hedgehog homolog (Drosophila); sonic hedgehog homolog; sonic hedgehog protein; Sonic Hedgehog; TPT; TPTPS