Recombinant Mouse ECM1 Protein, CF

Catalog #: 4428-EC Datasheet / COA / SDS

Catalog #	Availability	Size / Price	Qty
4428-EC-050

R&D Systems Recombinant Proteins and Enzymes

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Summary Product Datasheets Carrier Free Data Images Reconstitution Calculator Background Related Research Areas

Recombinant Mouse ECM1 Protein, CF Summary

Product Specifications

Purity

>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.

Activity

Measured by the ability of the immobilized protein to support the adhesion of BUD‑8 human fibroblast cells.

When 2.5 x 10⁴ cells/well are added to rmECM-1 coated plates (5 µg/mL, 100 µL/well), approximately 55‑85% will adhere after 60 minutes at 37° C.

Optimal dilutions should be determined by each laboratory for each application.

Source

Mouse myeloma cell line, NS0-derived mouse ECM1 protein
Ala20-Glu559, with a C-terminal 6-His tag

Accession #

AAI38694

N-terminal Sequence
Analysis

Ala20

Predicted Molecular Mass

61.8 kDa (monomer)

SDS-PAGE

80-90 kDa, reducing conditions

Product Datasheets

4428-EC

Product Datasheet

COA

SDS

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.

4428-EC

Formulation	Lyophilized from a 0.2 μm filtered solution in PBS.
Reconstitution	Reconstitute at 300 μg/mL in 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

Background: ECM1

Extracellular matrix protein-1 (ECM-1, ECM-1a) is an 85 kDa, secreted glycoprotein important in connective tissue organization (1 - 3). Of identified splice variants, the 559 amino acid (aa) form, ECM-1a is most widely expressed, with highest expression in the placenta, heart, and developing bones (3, 4). ECM-1b (434 aa) is found only in tonsil and skin, where it is associated with suprabasal keratinocytes (3, 5). Mouse ECM-1 contains a 19 aa signal peptide and a 540 aa secreted portion that includes an N-terminal proline-rich, cysteine-free region, two tandem repeat domains, and a C-terminal domain. Mature mouse ECM-1 shares 90% aa identity with rat ECM-1 and 65 - 69% aa identity with corresponding isoforms of human, equine, bovine and canine ECM-1. There are six repeats of a CC(X_{7 - 10})C motif (x = any aa) within the tandem repeat and C-terminal domains. These motifs, also found in members of the albumin family, are expected to form two (in ECM-1b) or three (in ECM-1a) “double loop” structures that are involved in ligand binding to extracellular matrix molecules such as fibulin-1, perlecan, laminin 332, and fibronectin (4 - 7). ECM-1 is over-expressed in many malignant epithelial tumors and has demonstrated angiogenic activity (8, 9). A role in regulating alkaline phosphatase during endochondral bone formation has also been suggested (4). In humans, loss of function within the tandem repeat regions due to mutation is considered causative of thickened and irregular extracellular matrix within connective tissue, called lipoid proteinosis (10). Autoantibodies in the skin disease lichen sclerosis also target these repeats (11). The phenotypes of these diseases support a role for ECM-1 as a “biological glue” in the dermis (1, 6, 7).

References