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Recombinant Cynomolgus Monkey CTLA-4 Fc Chimera Protein, CF

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When Recombinant Cynomolgus Monkey CTLA‑4 FcChimera (Catalog # 9336-CT) is coated at 0.5 µg/mL,100 μL/well, Recombinant Human B7‑1/CD80 Fc Chimera (Catalog # 140-B1) binds with anED50 of 5-30 ng/mL.
When Recombinant Cynomolgus Monkey CTLA‑4 FcChimera (Catalog # 9336-CT) is coated at 0.5 µg/mL,100 μL/well, Recombinant Human B7‑1/CD80 Fc Chimera (Catalog # 140-B1) binds with anED50 of 5-30 ng/mL.

Product Details

Summary
Reactivity Pm-CmSpecies Glossary
Applications Bioactivity
Format
Carrier-Free

Order Details

View Available Formulations
Catalog# & Formulation Size Price
Carrier Free
9336-CT-01M
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Recombinant Cynomolgus Monkey CTLA-4 Fc Chimera Protein, CF Summary

Details of Functionality
Measured by its binding ability in a functional ELISA. When Recombinant Cynomolgus Monkey CTLA‑4 Fc Chimera is coated at 0.5 µg/mL, 100 μL/well, Recombinant Human B7‑1/CD80 Fc Chimera (Catalog # 140-B1) binds with an ED50 of 5-30 ng/mL.
Source
Human embryonic kidney cell, HEK293-derived cynomolgus monkey CTLA-4 protein
Cynomolgus Monkey CTLA-4
(Ala37-Asp161)
Accession # XP_005574071		 IEGRMD Human IgG1
(Pro100-Lys330)
N-terminus C-terminus
Accession #
N-terminal Sequence
Ala37
Structure / Form
Disulfide-linked homodimer
Protein/Peptide Type
Recombinant Proteins
Purity
>95%, by SDS-PAGE visualized with Silver Staining and quantitative densitometry by Coomassie® Blue Staining.
Endotoxin Note
<0.10 EU per 1 μg of the protein by the LAL method.

Applications/Dilutions

Dilutions
  • Bioactivity
Theoretical MW
40 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
46-57 kDa, reducing conditions

Packaging, Storage & Formulations

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.
Buffer
Lyophilized from a 0.2 μm filtered solution in PBS.
Purity
>95%, by SDS-PAGE visualized with Silver Staining and quantitative densitometry by Coomassie® Blue Staining.
Reconstitution Instructions
Reconstitute at 1 mg/mL in PBS.

Notes

This product is produced by and ships from R&D Systems, Inc., a Bio-Techne brand.

Alternate Names for Recombinant Cynomolgus Monkey CTLA-4 Fc Chimera Protein, CF

  • CD
  • CD152 antigen
  • CD152
  • CD152IDDM12
  • CD28
  • celiac disease 3
  • CELIAC3
  • CTLA4
  • CTLA-4
  • cytotoxic T-lymphocyte antigen 4
  • cytotoxic T-lymphocyte protein 4
  • Cytotoxic T-lymphocyte-associated antigen 4
  • cytotoxic T-lymphocyte-associated protein 4
  • cytotoxic T-lymphocyte-associated serine esterase-4
  • GRD4
  • GSE
  • ICOS
  • ligand and transmembrane spliced cytotoxic T lymphocyte associated antigen 4

Background

CTLA-4 (cytotoxic T-lymphocyte-4, designated CD152), is a type I transmembrane T cell inhibitory molecule that is a member of the Ig superfamily (1, 2). Cyno CTLA-4 has a 98% homology to human CTLA-4. Human or mouse CTLA-4 cDNA encodes 223 amino acids (aa) including a 35 aa signal sequence, a 126 aa extracellular domain (ECD) with one Ig-like V-type domain, a 21 aa transmembrane (TM) sequence, and a 41 aa cytoplasmic sequence. It is found as a covalent homodimer of 41-43 kDa (2). Within the ECD, human CTLA-4 shares 98%, 68%, 71% and 83-86% aa sequence identity with cynomolgus, mouse, rat and porcine/bovine/rabbit/feline/canine CTLA-4, respectively. A 174 aa form that lacks TM and cytoplasmic sequences (sCTLA-4) is possibly secreted (3-5). In mouse, an isoform lacking the Ig-like domain has ligand-independent inhibitory activity and is termed liCTLA-4 (6). CD28, which is structurally related to CTLA-4, is constitutively expressed on naïve T cells and promotes T cell activation when engaged by B7-2 on antigen-presenting cells (APC) within the immunological synapse (IS) (1, 7, 8). In contrast, CTLA-4 is recruited from intracellular vesicles to the IS beginning 1-2 days after T cell activation (2, 7, 8). It forms a linear lattice with B7-1 on APC, inducing negative regulatory signals and ending T cell activation (9). Abatacept, a therapeutic human CTLA-4-Ig fusion protein (trade name Orencia), competes with CD28 for B7-1 and B7-2 binding and has been used to antagonize T cell activation in autoimmune conditions and to enhance transplant survival (10). Mice deleted for CTLA-4 show no abnormalities until after birth, but then develop lethal autoimmune reactions due to continued T cell activation and poor control by regulatory T cells, which constitutively express CTLA-4 in wild-type mice and humans (11-13).
  1. Harper, K. et al. (1991) J. Immunol. 147:1037.
  2. Teft, W.A. et al. (2006) Annu. Rev. Immunol. 24:65.
  3. Magistrelli, G. et al. (1999) Eur. J. Immunol. 29:3596.
  4. Tector, M. et al. (2009) BMC Immunol. 10:51.
  5. Oaks, M.K. and K.M. Hallett (2000) J. Immunol. 164:5015.
  6. Vijayakrishnan, L. et al. (2004) Immunity 20:563.
  7. Pentcheva-Hoang, T. et al. (2004) Immunity 21:401.
  8. Jansson, A. et al. (2005) J. Immunol 175:1575.
  9. Darlington, P.J. et al. (2005) J. Immunol. 175:996.
  10. Platt, A.M. et al. (2010) J. Immunol. 185:1558.
  11. Wing, K. et al. (2008) Science. 322: 271.
  12. Friedline, R.H. et al. (2009) J. Exp. Med. 206:421.
  13. Jain, N. et al. (2010) Proc. Natl. Acad. Sci. USA. 107:1524.

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