>95%, by SDS-PAGE under reducing conditions and visualized by silver stain
Endotoxin Note
<0.10 EU per 1 μg of the protein by the LAL method.
Applications/Dilutions
Dilutions
Bioactivity
Theoretical MW
27.2 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
34-37 kDa, reducing conditions
Publications
Read Publication using 5017-CR 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.
Purity
>95%, by SDS-PAGE under reducing conditions and visualized by silver stain
Reconstitution Instructions
Reconstitute at 200 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 Mouse CRISP-4 Protein, CF
CRISP4
CRISP-4
Background
CRISP-4 is one of several CRISPs (cysteine-rich secretory proteins) that contain 16 invariant cysteine residues and show structural homolgy to snake, insect, and lizard venom proteins. These proteins consist of an N-terminal SCP/CAP domain, a hinge region, and a cysteine-rich CRISP domain. CRISPs are expressed in discrete but overlapping regions of the male reproductive tract and play a role in spermatozoa adhesion with Sertoli cells and oocytes, decapacitation, and the acrosomal reaction (1 - 3). CRISP-4 facilitates the progesterone-induced acrosomal reaction by inhibiting calcium conductance through the TRPM8 channel on sperm (4). Mouse CRISP-4 is secreted as a 32 kDa protein in the epididymis (primarily the caput region), vas deferens, and seminal vesicle (5, 6). It is also associated with spermatozoa from the testis and caudal epididymis as a 26 - 28 kDa molecule (6). Its expression is induced at the onset of puberty in an androgen-dependent fashion (5). Mouse and rat CRISP-1 are additionally expressed in salivary glands, while CRISP-4 is not (6). Expression patterns, genomic structure, and sequence conservation indicate that CRISP-4 in mouse and rat are the likely orthologs of human CRISP-1 (5, 6). Mature mouse CRISP-4 shares 90% and 64% aa sequence identity with rat CRISP-4 and human CRISP-1, respectively (5). Mature mouse CRISP-4 shares 38% - 43% aa sequence identity with mouse CRISP-1, -2, and -3.
Koppers, A.J. et al. (2011) Asian J. Androl. 13:111.
Gibbs, G.M. et al. (2008) Endocr. Rev. 29:865.
Maeda, T. et al. (1998) Biochem. Biophys. Res. Commun. 248:140.
Gibbs, G.M. et al. (2011) Proc. Natl. Acad. Sci. 108:7034.
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