Recombinant Cynomolgus SIRP beta 1/CD172b Fc Protein, CF

R&D Systems, part of Bio-Techne | Catalog # 10312-SB

R&D Systems, part of Bio-Techne
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10312-SB-050
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Key Product Details

Source

CHO

Accession #

XP_005568593.1

Structure / Form

Disulfide-linked homodimer

Conjugate

Unconjugated

Applications

Bioactivity

View all SIRP beta 1/CD172b Proteins and Enzymes »

Product Specifications

Source

Chinese Hamster Ovary cell line, CHO-derived cynomolgus monkey SIRP beta 1/CD172b protein
Cynomolgus Monkey SIRP beta1/CD172b
(Glu30-Pro369)
Accession # XP_005568593.1		 IEGRMD Human IgG1
(Pro100-Lys330)
N-terminus C-terminus

Purity

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

Endotoxin Level

<0.10 EU per 1 μg of the protein by the LAL method.

N-terminal Sequence Analysis

Glu30

Predicted Molecular Mass

64 kDa

SDS-PAGE

88-99 kDa, under reducing conditions

Activity

Measured by its binding ability in a functional ELISA.
When Recombinant Cynomolgus Monkey SIRP beta1/CD172b Fc Chimera (Catalog # 10312-SB) is immobilized at 1 µg/mL (100 µL/well), Recombinant Human SP‑D (Catalog # 1920-SP) binds with an ED50 of 40-320 ng/mL.

Scientific Data Images for Recombinant Cynomolgus SIRP beta 1/CD172b Fc Protein, CF

Recombinant Cynomolgus SIRP beta 1/CD172b Fc Protein Binding Activity

Recombinant Cynomolgus SIRP beta 1/CD172b Fc Protein Binding Activity

When Recombinant Cynomolgus Monkey SIRP beta1/CD172b Fc Chimera (Catalog # 10312-SB) is immobilized at 1 µg/mL (100 µL/well), Recombinant Human SP-D (Catalog # 1920-SP) binds with an ED50 of 40-320 ng/mL.
Recombinant Cynomolgus SIRP beta 1/CD172b Fc Protein SDS-PAGE

Recombinant Cynomolgus SIRP beta 1/CD172b Fc Protein SDS-PAGE

2 μg/lane of Recombinant Cynomolgus Monkey SIRP beta1/CD172b Fc Chimera (Catalog # 10312-SB) was resolved with SDS-PAGE under reducing (R) and non-reducing (NR) conditions and visualized by Coomassie® Blue staining, showing bands at 88-99 kDa and 170-200 kDa, respectively.

Formulation, Preparation and Storage

10312-SB
Formulation Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose.
Reconstitution Reconstitute at 500 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.

Background: SIRP beta 1/CD172b

Signal-regulatory protein beta 1 (SIRP beta 1) is a disulfide-linked type I membrane glycoprotein that belongs to the SIRP/SHPS (CD172) family of the immunoglobulin (Ig) superfamily (1). Mature cynomolgus SIRP beta 1 consists of a 342 amino acid (aa) extracellular domain (ECD), a 26 aa transmembrane segment, and a short 4 aa cytoplasmic domain. Within the ECD, cynomolgus SIRP beta 1 shares 87% aa sequence identity with human SIRP beta 1. The SIRP family are paired receptors that have similar extracellular domains but differing C-terminal domains and functions (1). Members of this family are characterized by an extracellular region containing a V-set Ig domain containing a J-like sequence and two C1-set Ig domains (2). Positively charged residues within the transmembrane domain mediate interactions with DAP12 proteins which contain immunoreceptor tyrosine-based activation motifs (ITAMs) (3). Proteins in the SIRP family are typically expressed in cells of monocyte, macrophage or dendritic lineages (4). SIRP beta 1 has a relatively short cytoplasmic region and lacks the signaling motifs for association with phosphatases. However, formation of the SIRP beta 1/DAP12 complex in myeloid cells induce tyrosine phosphorylation, mitogen-activated protein kinase activation, and cellular activation (5, 6). Engagement of SIRP beta 1 by specific monoclonal antibodies promoted Fc gamma receptor-dependent or -independent phagocytosis in mouse peritoneal macrophages (7). Surfactant protein D (SP-D) has been shown to bind SIRP alpha and SIRP beta 1 in a calcium-dependent and sugar-specific manner on a distinct binding site from CD47 (8). Although the SIRP beta 1 extracellular regions share a high degree of homology with the SIRP alpha, SIRP beta 1 has been shown not to bind CD47 (9).

References

  1. vanBeek, E.M. et al. (2005) J. Immunol. 175:7781.
  2. van den Berg, T. et al. (2008) Trends in Immunology 29:203.
  3. Liu, Y. et al. (2005) Journal of Biological Chemistry 280:36132.
  4. Matozaki, T. et al. (2009) Trends in Cell Biology 19:72.
  5. Dietrich, J. et al. (2000) J Immunol. 164:9.
  6. Brook, G. et al. (2004) J Immunol. 173:2562.
  7. Hayashi, A. et al. (2004) J Biol Chem. 279:29450.
  8. Fournier, B. et al. (2012) J. Biol. Chem. 287:19386.
  9. Seiffert, M. et al. (2001) Blood 97:2741.

Long Name

Signal-regulatory Protein beta 1

Alternate Names

CD172b, SIRPB1

Entrez Gene IDs

10326 (Human); 102139733 (Cynomolgus Monkey)

Gene Symbol

SIRPB1

UniProt

XP_005568593.1

Additional SIRP beta 1/CD172b Products

Product Documents for Recombinant Cynomolgus SIRP beta 1/CD172b Fc Protein, CF

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Product Specific Notices for Recombinant Cynomolgus SIRP beta 1/CD172b Fc Protein, CF

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