Recombinant Human CTLA4 Protein (GST Tag) (RPES3230)



ELISA Kit Technical Manual

Recombinant Human CTLA4 Protein (GST Tag)

Background:Cytotoxic Tlymphocyte 4(CTLA-4,CD152), is a type I transmembrane T cell inhibitory molecule that is a member of the Ig superfamily. Human or mouse CTLA4 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 widely expressed with highest levels in lymphoid tissues. CD28 and CTLA-4, together with their ligands, B7 and B7-2, constitute one of the dominant costimulatory pathways that regulate T and B cell responses. CD28 and CTLA-4 are structurally homologous molecules that are members of the immunoglobulin (Ig) gene superfamily. CTLA4 transmits an inhibitory signal to T cells, whereas CD28 transmits a stimulatory signal. Intracellular CTLA4 is also found in regulatory T Cells and may play an important role in their functions. Tcell activation through the Tcell receptor and CD28 leads to increased expression of CTLA4.
Name:Recombinant Human CTLA4 Protein (GST Tag)
Assay Genie SKU:RPES3230
Synonyms:Cytotoxic T-lymphocyte protein 4;Cytotoxic T-lymphocyte-associated antigen 4;CTLA4;CD152;Cytotoxic T-Lymphocyte-Associated Protein 4
Expression host:Human Cells
Mol Mass:39.2 kDa
AP Mol Mass:40-55 kDa
Purity:> 95% as determined by reducing SDS-PAGE.
Endotoxin:< 1.0 EU per ?g as determined by the LAL method.
Storage:Lyophilized protein should be stored at < -20'C, though stable at room temperature for 3 weeks.Reconstituted protein solution can be stored at 4-7? for 2-7 days.Aliquots of reconstituted samples are stable at < -20'C for 3 months.
Shipping:This product is provided as lyophilized powder which is shipped with ice packs.
Formulation:Lyophilized from a 0.2 um filtered solution of PBS, pH7.4.
Reconstitution:Please refer to the printed manual for detailed information.
UniProt Protein Function:CTLA-4: Inhibitory receptor acting as a major negative regulator of T-cell responses. The affinity of CTLA4 for its natural B7 family ligands, CD80 and CD86, is considerably stronger than the affinity of their cognate stimulatory coreceptor CD28. Genetic variation in CTLA4 influences susceptibility to systemic lupus erythematosus (SLE). SLE is a chronic, inflammatory and often febrile multisystemic disorder of connective tissue. It affects principally the skin, joints, kidneys and serosal membranes. SLE is thought to represent a failure of the regulatory mechanisms of the autoimmune system. Genetic variations in CTLA4 may influence susceptibility to Graves disease, an autoimmune disorder associated with overactivity of the thyroid gland and hyperthyroidism. Genetic variation in CTLA4 is the cause of susceptibility to diabetes mellitus insulin-dependent type 12 (IDDM12). A multifactorial disorder of glucose homeostasis that is characterized by susceptibility to ketoacidosis in the absence of insulin therapy. Clinical fetaures are polydipsia, polyphagia and polyuria which result from hyperglycemia-induced osmotic diuresis and secondary thirst. These derangements result in long-term complications that affect the eyes, kidneys, nerves, and blood vessels. Genetic variation in CTLA4 is the cause of susceptibility to celiac disease type 3 (CELIAC3). It is a multifactorial disorder of the small intestine that is influenced by both environmental and genetic factors. It is characterized by malabsorption resulting from inflammatory injury to the mucosa of the small intestine after the ingestion of wheat gluten or related rye and barley proteins. In its classic form, celiac disease is characterized in children by malabsorption and failure to thrive. 4 isoforms of the human protein are produced by alternative splicing.
UniProt Protein Details:

Protein type:Immunoglobulin superfamily; Membrane protein, integral

Chromosomal Location of Human Ortholog: 2q33

Cellular Component: Golgi apparatus; perinuclear region of cytoplasm; integral to plasma membrane; plasma membrane; clathrin-coated endocytic vesicle; external side of plasma membrane

Molecular Function:protein binding

Biological Process: B cell receptor signaling pathway; negative regulation of T cell proliferation; positive regulation of apoptosis; negative regulation of regulatory T cell differentiation; T cell costimulation; negative regulation of immune response; immune response; negative regulation of B cell proliferation; response to DNA damage stimulus

Disease: Autoimmune Lymphoproliferative Syndrome, Type V; Celiac Disease, Susceptibility To, 3; Diabetes Mellitus, Insulin-dependent, 12; Hashimoto Thyroiditis; Systemic Lupus Erythematosus

NCBI Summary:This gene is a member of the immunoglobulin superfamily and encodes a protein which transmits an inhibitory signal to T cells. The protein contains a V domain, a transmembrane domain, and a cytoplasmic tail. Alternate transcriptional splice variants, encoding different isoforms, have been characterized. The membrane-bound isoform functions as a homodimer interconnected by a disulfide bond, while the soluble isoform functions as a monomer. Mutations in this gene have been associated with insulin-dependent diabetes mellitus, Graves disease, Hashimoto thyroiditis, celiac disease, systemic lupus erythematosus, thyroid-associated orbitopathy, and other autoimmune diseases. [provided by RefSeq, Jul 2008]
UniProt Code:P16410
NCBI GenInfo Identifier:27735177
NCBI Gene ID:1493
NCBI Accession:P16410.3
UniProt Secondary Accession:P16410,O95653, Q0PP65, Q52MC1, Q53TD5, Q5S005, Q8WXJ1 Q96P43, Q9UKN9, A0N1S0, E9PDH0,
UniProt Related Accession:P16410
Molecular Weight:223
NCBI Full Name:Cytotoxic T-lymphocyte protein 4
NCBI Synonym Full Names:cytotoxic T-lymphocyte-associated protein 4
NCBI Official Symbol:CTLA4
NCBI Official Synonym Symbols:CD; GSE; GRD4; ALPS5; CD152; CTLA-4; IDDM12; CELIAC3
NCBI Protein Information:cytotoxic T-lymphocyte protein 4; CD152 isoform; celiac disease 3; insulin-dependent diabetes mellitus 12; cytotoxic T-lymphocyte-associated serine esterase-4; cytotoxic T lymphocyte associated antigen 4 short spliced form; ligand and transmembrane spliced cytotoxic T lymphocyte associated antigen 4
UniProt Protein Name:Cytotoxic T-lymphocyte protein 4
UniProt Synonym Protein Names:Cytotoxic T-lymphocyte-associated antigen 4; CTLA-4; CD_antigen: CD152
Protein Family:Cytotoxic T-lymphocyte protein
UniProt Gene Name:CTLA4
UniProt Entry Name:CTLA4_HUMAN
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Additional Information

Product type:
Recombinant Protein
Host species:
Human Cells
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