Recombinant Human AMICA Fc Chimera Protein, CF

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3449-AM-050
R&D Systems Recombinant Proteins and Enzymes
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Recombinant Human AMICA Fc Chimera Protein, CF Summary

Product Specifications

Purity
>90%, 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 BT‑20 human breast cancer cells. When 5 x 104 cells/well are added to rhAMICA/Fc Chimera coated plates (10 µg/mL, 100 µL/well), approximately 55%-75% will adhere after 1 hour at 37° C.
Similar results were obtained using HeLa, A549, and T84 cell-lines.
Optimal dilutions should be determined by each laboratory for each application.
Source
Mouse myeloma cell line, NS0-derived human AMICA/JAML protein
Human AMICA
(Leu10 - Leu265)
Accession # NP_694938
IEGRMD Human IgG1
(Pro100 - Lys330)
N-terminus C-terminus
Accession #
N-terminal Sequence
Analysis
Leu10
Structure / Form
Disulfide-linked homodimer
Predicted Molecular Mass
55.5 kDa (monomer)
SDS-PAGE
65-70 kDa, reducing conditions

Product Datasheets

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3449-AM

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.

3449-AM

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: AMICA/JAML

AMICA (adhesion molecule, interacting with CXADR antigen 1), also known as JAML, is a 65 kDa, heavily glycosylated transmembrane protein that belongs to the junctional adhesion molecule (JAM) subset of the immunoglobulin superfamily (1). JAM family molecules contribute to intercellular connections within epithelial and endothelial cell layers, and mediate their interactions with various hemopoietic cells (1). The human AMICA cDNA encodes a 384 amino acid (aa) precursor that includes a 19 aa signal sequence, a 256 aa extracellular domain (ECD) with two Ig-like domains, a 21 aa transmembrane segment, and a 98 aa cytoplasmic domain (2). Alternative splicing may generate isoforms with N- and C-terminal deletions. In contrast to other JAM family proteins, AMICA does not contain a cytoplasmic PDZ-binding motif (3). Within the ECD, human AMICA shares 58% and 63% aa sequence identity with mouse and rat AMICA, respectively. It shares 18% - 20% aa sequence identity with the ECDs of human JAM-A, -B, -C, and JAM4. AMICA is expressed on the surface of granulocytes and monocytes and is upregulated during the differentiation of myeloid leukemia cells (2, 3). A motif in the ECD, which promotes dimerization of other JAM family proteins, is required for surface localization of AMICA (2). AMICA mediates the adhesion of monocytes to endothelial cells (2) and neutrophil migration across epithelial cell monolayers (3). This latter function involves specific interactions of AMICA with the coxsackie virus and adenovirus receptor (CXADR) in epithelial tight junctions (3). In particular, the membrane proximal Ig-like domain of AMICA binds the membrane-distal Ig-like domain of CXADR (3). AMICA does not appear to interact homophilically, as neutrophils adhere to immobilized CXADR but not to immobilized AMICA (3).

References
  1. Mandell, K.J. and C.A. Parkos (2005) Adv. Drug Deliv. Rev. 57:857.
  2. Moog-Lutz, C. et al. (2003) Blood 102:3371.
  3. Zen, K. et al. (2005) Mol. Biol. Cell 16:2694.
Long Name
Adhesion Molecule, Interacts With CXADR Antigen 1
Entrez Gene IDs
120425 (Human); 270152 (Mouse)
Alternate Names
adhesion molecule, interacts with CXADR antigen 1; AMICA; AMICA1; CREA7-1; Gm638; JAML

Citation for Recombinant Human AMICA Fc Chimera 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. JAM-L-mediated leukocyte adhesion to endothelial cells is regulated in cis by alpha4beta1 integrin activation.
    Authors: Luissint AC, Lutz PG, Calderwood DA, Couraud PO, Bourdoulous S
    J. Cell Biol., 2008-12-08;183(6):1159-73.
    Species: Human
    Sample Types: Whole Cells
    Applications: Bioassay

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