Recombinant Human CL-P1/COLEC12 Protein, CF

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Product Details
Citations (1)
Supplemental Products

Recombinant Human CL-P1/COLEC12 Protein, CF Summary

>95%, by SDS-PAGE under reducing conditions and visualized by silver stain
Endotoxin Level
<0.10 EU per 1 μg of the protein by the LAL method.
Measured by its binding ability in a functional ELISA. Immobilized rhCL-P1 at 5 µg/mL (100 µL/well) can bind biotinylated advance glycation endproducts of bovine serum albumin (AGE-BSA) with a linear range of
3-200 ng/mL.
Mouse myeloma cell line, NS0-derived human CL-P1/COLEC12 protein
Leu57-Leu742, with an N-terminal 9-His tag
Accession #
N-terminal Sequence
Structure / Form
Disulfide-linked homodimer
Predicted Molecular Mass
76 kDa (monomer)
125-130 kDa, reducing conditions

Product Datasheets


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.
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Background: CL-P1/COLEC12

Collectins are a family of Ca++-dependent, C-type lectins that contain a collagenous domain and function as recognition molecules for molecular patterns found on pathogens (1 - 4). Human collectin placenta 1 (CL-P1; also known as collectin sub-family member 12 and SRCL type I [scavenger receptor with C-type lectin type I]) is a 110 kDa member of the collectin family of glycoproteins (5, 6). With two exceptions, all collectins are secreted. CL-P1 is the only collectin known to be membrane bound, while CL-L1 (collectin liver-1) is the only known cytoplasmic collectin (1). Human CL-P1 is synthesized as a 742 amino acid (aa) type II transmembrane glycoprotein that contains an N-terminal 39 aa cytoplasmic domain, a 17 aa transmembrane segment, and a 686 aa C-terminal extracellular region (6). The short cytoplasmic domain contains an internalization motif (Y-K-R-F) while the extracellular region is complex, demonstrating a coiled-coil segment, a Ser-Thr rich region, a collagen-like structure and a C-type lectin/ carbohydrate recognition domain (CRD). Notably, this CRD recognizes galactose (and fucose) within the context of asialo-orosomucoids associated with the Lewisx epitope (7, 8). CL-P1 has a 300 kDa trimeric form due to its collagen-like and coiled-coil helical domains (1, 5). There is a 97 kDa, alternate splice form of CL-P1 (SRCL type II) that shows a 120 aa truncation at the C-terminus. This effectively removes the entire CRD found on full-length CL-P1 (6). Human CL-P1 is 93% aa identical to mouse CL-P1 over the entire extracellular region, and 87% aa identical within each species CRD (5, 9). Human CL-P1 is known to be expressed in vascular endothelial cells (5). CL-P1 may play a role in bacterial recognition or as a scavenger receptor for desialylated.

  1. van de Wetering, JK. et al. (2004) Eur. J. Biochem. 271:1229.
  2. Holmskov, U. et al. (2003) Annu. Rev. Immunol. 21:547.
  3. Hoppe, H-J. and K. Reid (1994) Protein Sci. 3:1143.
  4. Hickling, T.P. et al. (2004) J. Leukoc. Biol. 75:27.
  5. Ohtani, K. et al. (2001) J. Biol. Chem. 276:44222.
  6. Nakamura,K. et al. (2001) Biochem. Biophys. Res. Commun. 280:1028.
  7. Coombs, P.J. et al. (2005) J. Biol. Chem. 280:22993.
  8. Yoshida, T. et al. (2003) J. Biochem. 133:271.
  9. Nakamura, K. et al. (2001) Biochim. Biophys. Acta 1522:53.
Long Name
Collectin Placenta 1
Entrez Gene IDs
81035 (Human); 140792 (Mouse); 361289 (Rat)
Alternate Names
CL-P1; CLP1, cleavage and polyadenylation factor I subunit, homolog (S. cerevisiae); COLEC12; EC; hClp1; HEAB; HEABATP/GTP-binding protein; homolog of yeast CFIA subunit Clp1p; NSR2; Polynucleotide kinase Clp1; polyribonucleotide 5'-hydroxyl-kinase Clp1; Pre-mRNA cleavage complex II protein Clp1; SCARA4; SRCL Type I

Citation for Recombinant Human CL-P1/COLEC12 Protein, CF

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.

1 Citation: Showing 1 - 1

  1. Soluble Collectin-12 (CL-12) Is a Pattern Recognition Molecule Initiating Complement Activation via the Alternative Pathway.
    Authors: Ma Y, Hein E, Munthe-Fog L, Skjoedt M, Bayarri-Olmos R, Romani L, Garred P
    J Immunol, 2015;195(7):3365-73.


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