CD1B recombinant protein

CD1B Protein, Human, Recombinant (hFc Tag)

Cat. Num. AAA8120988

• Gene Names: CD1B; R1; CD1; CD1A
• Purity: >88% as determined by SDS-PAGE
• Synonyms: CD1B; CD1B Protein; Human; Recombinant (hFc Tag); Human CD1B/CD1A Protein (Fc Tag); CD1 Protein; CD1A Protein; R1 Protein; CD1b molecule; CD1B recombinant protein

• Host: HEK293 Cells
• Purity/Purification: >88% as determined by SDS-PAGE
• Form/Format: Lyophilized from sterile PBS, pH7.4. Normally 5%-8% trehalose, mannitol and 0.01% Tween80 are added as protectants before lyophilization. Please refer to the specific buffer information in the hard copy of CoA.
• Sequence: Met1-Ser303

• Species: Human
• Endotoxin: <1.0EU per ug of the protein as determined by the LAL method
• Predicted N Terminal: Ser 18
• Tag: C-human IgG1-Fc
• Protein Construction: A DNA sequence encoding the human CD1B (NP_001755)(Met1-Ser 303) was expressed, fused with the Fc region of human IgG1 at the C-terminus.
• Reconstitution: A hardcopy of COA with reconstitution instruction is sent along with the products. Please refer to it for detailed information.
• Preparation and Storage: Samples are stable for up to twelve months from date of receipt at -20 degree C to -80 degree C. Store it under sterile conditions at -20 degree C to -80 degree C. It is recommended that the protein be aliquoted for optimal storage. Avoid repeated freeze-thaw cycles.; In general, recombinant proteins are provided as lyophilized powder which are shipped at ambient temperature. Bulk packages of recombinant proteins are provided as frozen liquid.; They are shipped out with blue ice.

SDS-Page

Related Product Information for CD1B recombinant protein

Background: CD1B contains 1 Ig-like (immunoglobulin-like) domain and belongs to the CD1 family. CD1 family members are transmembrane glycoproteins, which are structurally related to the major histocompatibility complex (MHC) proteins and form heterodimers with beta-2-microglobulin. During protein synthesis and maturation, they bind endogenous lipids that are replaced by lipid or glycolipid antigens when the proteins are internalized and pass through endosomes, before trafficking back to the cell surface. CD1B localizes to late endosomes and lysosomes via a tyrosine-based motif in the cytoplasmic tail, and requires vesicular acidification to bind lipid antigens.. It is expressed on cortical thymocytes, epidermal Langerhans cells, dendritic cells, on certain T-cell leukemias, and in various other tissues. CD1B is an antigen-presenting protein that binds self and non-self lipid and glycolipid antigens and presents them to T-cell receptors on natural killer T-cells.

References

Coventry B, et al. (2004) CD1a in human cancers: a new role for an old molecule. Trends Immunol. 25 (5):242-8.Martin LH, et al. (1988) Structure and expression of the human thymocyte antigens CD1a, CD1b, and CD1c. Proc Natl Acad Sci. 84(24):9189-93.Aruffo A, et al. (1989) Expression of cDNA clones encoding the thymocyte antigens CD1a, b, c demonstrates a hierarchy of exclusion in fibroblasts. J Immunol. 143(5):1723-30.Longley J, et al. (1989) Molecular cloning of CD1a (T6), a human epidermal dendritic cell marker related to class I MHC molecules. J Invest Dermatol. 92(4):628-31.

NCBI and Uniprot Product Information

• NCBI GI #: 4502645
• NCBI GeneID: 910
• NCBI Accession #: NP_001755
• NCBI GenBank Nucleotide #: NM_001764.2
• UniProt Accession #: P29016; Q5TDK9; Q5TDL0; Q9UMM2
• Molecular Weight: 34.2 kDa (310aa) confirmed by MALDI-TOF
• NCBI Official Full Name: T-cell surface glycoprotein CD1b
• NCBI Official Synonym Full Names: CD1b molecule
• NCBI Official Symbol: CD1B
• NCBI Official Synonym Symbols: R1; CD1; CD1A
• NCBI Protein Information: T-cell surface glycoprotein CD1b
• UniProt Protein Name: T-cell surface glycoprotein CD1b
• Protein Family: T-cell surface glycoprotein
• UniProt Gene Name: CD1B
• UniProt Entry Name: CD1B_HUMAN

NCBI Description

This gene encodes a member of the CD1 family of transmembrane glycoproteins, which are structurally related to the major histocompatibility complex (MHC) proteins and form heterodimers with beta-2-microglobulin. The CD1 proteins mediate the presentation of primarily lipid and glycolipid antigens of self or microbial origin to T cells. The human genome contains five CD1 family genes organized in a cluster on chromosome 1. The CD1 family members are thought to differ in their cellular localization and specificity for particular lipid ligands. The protein encoded by this gene localizes to late endosomes and lysosomes via a tyrosine-based motif in the cytoplasmic tail, and requires vesicular acidification to bind lipid antigens. [provided by RefSeq, Jul 2008]

Uniprot Description

CD1B: Antigen-presenting protein that binds self and non-self lipid and glycolipid antigens and presents them to T-cell receptors on natural killer T-cells. 2 isoforms of the human protein are produced by alternative splicing.

Protein type: Membrane protein, integral

Chromosomal Location of Human Ortholog: 1q23.1

Cellular Component: cell surface; lysosomal membrane; plasma membrane; integral to membrane; endosome membrane

Molecular Function: protein binding; beta-2-microglobulin binding; exogenous lipid antigen binding; endogenous lipid antigen binding

Biological Process: antigen processing and presentation, exogenous lipid antigen via MHC class Ib; immune response