製品: CD8 Antibody
カタログ: BF0583
タンパク質の説明: Mouse monoclonal antibody to CD8
アプリケーション: WB ELISA FACS
反応性: Human
分子量: 25kDa; 26kD(Calculated).
ユニプロット: P01732
RRID: AB_2833560

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製品説明

ソース:
Mouse
アプリケーション:
WB 1:500-1:2000, ELISA 1:10000, FCM 1:200-1:400
*The optimal dilutions should be determined by the end user.
*Tips:

WB: For western blot detection of denatured protein samples. IHC: For immunohistochemical detection of paraffin sections (IHC-p) or frozen sections (IHC-f) of tissue samples. IF/ICC: For immunofluorescence detection of cell samples. ELISA(peptide): For ELISA detection of antigenic peptide.

反応性:
Human
クローナリティ:
Monoclonal [AFB1535]
特異性:
CD8 antibody detects endogenous levels of total CD8.
RRID:
AB_2833560
引用形式: Affinity Biosciences Cat# BF0583, RRID:AB_2833560.
コンジュゲート:
Unconjugated.
精製:
Affinity-chromatography.
保存:
Mouse IgG1 in phosphate buffered saline (without Mg2+ and Ca2+), pH 7.4, 150mM NaCl, 0.02% sodium azide and 50% glycerol. Store at -20 °C. Stable for 12 months from date of receipt.
別名:

折りたたみ/展開

alpha polypeptide (p32); CD8; CD8 antigen alpha polypeptide; CD8 antigen alpha polypeptide (p32); CD8a; CD8A antigen; CD8A molecule; CD8A_HUMAN; Leu2; Leu2 T lymphocyte antigen; Ly3; LYT3; MAL; OKT8 T cell antigen; OTTHUMP00000160760; OTTHUMP00000160764; OTTHUMP00000203528; OTTHUMP00000203721; p32; T cell antigen Leu2; T cell co receptor; T-cell surface glycoprotein CD8 alpha chain; T-lymphocyte differentiation antigen T8/Leu-2; T8 T cell antigen; T8/Leu-2 T-lymphocyte differentiation antigen;

免疫原

免疫原:

Purified recombinant fragment of human CD8 expressed in E. Coli.

Uniprot:
遺伝子(ID):
発現特異性:
P01732 CD8A_HUMAN:

CD8 on thymus-derived T-cells usually consists of a disulfide-linked alpha/CD8A and a beta/CD8B chain. Less frequently, CD8 can be expressed as a CD8A homodimer. A subset of natural killer cells, memory T-cells, intraepithelial lymphocytes, monocytes and dendritic cells expresses CD8A homodimers. Expressed at the cell surface of plasmacytoid dendritic cells upon herpes simplex virus-1 stimulation.

タンパク質の説明:
CD8 T cell surface antigen is heterodimer of an alpha and a beta chain linked by two disulfide bonds .It belongs type I membrane protein. Selectively expressing of CD8 on a subset of T cells leads to CD8 T cell development. Through identifying cytotoxic/suppressor T-cells that interact with MHC class I bearing targets, CD8 is thought to play a role in the process of T-cell mediated killing. Veillette et al (1988) found the CD8 is associated with the internal membrane tyrosine- protein kinase p56lck.
タンパク質配列:
MALPVTALLLPLALLLHAARPSQFRVSPLDRTWNLGETVELKCQVLLSNPTSGCSWLFQPRGAAASPTFLLYLSQNKPKAAEGLDTQRFSGKRLGDTFVLTLSDFRRENEGYYFCSALSNSIMYFSHFVPVFLPAKPTTTPAPRPPTPAPTIASQPLSLRPEACRPAAGGAVHTRGLDFACDIYIWAPLAGTCGVLLLSLVITLYCNHRNRRRVCKCPRPVVKSGDKPSLSARYV

PTMs - P01732 基板として

Site PTM Type Enzyme
S224 Phosphorylation
S229 Phosphorylation
S231 Phosphorylation

研究背景

機能:

Integral membrane glycoprotein that plays an essential role in the immune response and serves multiple functions in responses against both external and internal offenses. In T-cells, functions primarily as a coreceptor for MHC class I molecule:peptide complex. The antigens presented by class I peptides are derived from cytosolic proteins while class II derived from extracellular proteins. Interacts simultaneously with the T-cell receptor (TCR) and the MHC class I proteins presented by antigen presenting cells (APCs). In turn, recruits the Src kinase LCK to the vicinity of the TCR-CD3 complex. LCK then initiates different intracellular signaling pathways by phosphorylating various substrates ultimately leading to lymphokine production, motility, adhesion and activation of cytotoxic T-lymphocytes (CTLs). This mechanism enables CTLs to recognize and eliminate infected cells and tumor cells. In NK-cells, the presence of CD8A homodimers at the cell surface provides a survival mechanism allowing conjugation and lysis of multiple target cells. CD8A homodimer molecules also promote the survival and differentiation of activated lymphocytes into memory CD8 T-cells.

PTMs:

Palmitoylated, but association with CD8B seems to be more important for the enrichment of CD8A in lipid rafts.

O-glycosylated.

Phosphorylated in cytotoxic T-lymphocytes (CTLs) following activation.

細胞の位置付け:

Cell membrane>Single-pass type I membrane protein.
Note: CD8A localizes to lipid rafts only when associated with its partner CD8B.

Secreted.

Extracellular region or secreted Cytosol Plasma membrane Cytoskeleton Lysosome Endosome Peroxisome ER Golgi apparatus Nucleus Mitochondrion Manual annotation Automatic computational assertionSubcellular location
組織特異性:

CD8 on thymus-derived T-cells usually consists of a disulfide-linked alpha/CD8A and a beta/CD8B chain. Less frequently, CD8 can be expressed as a CD8A homodimer. A subset of natural killer cells, memory T-cells, intraepithelial lymphocytes, monocytes and dendritic cells expresses CD8A homodimers. Expressed at the cell surface of plasmacytoid dendritic cells upon herpes simplex virus-1 stimulation.

サブユニット構造:

Forms disulfide-linked heterodimers with CD8B at the cell surface. Forms also homodimers in several cell types including NK-cells or peripheral blood T-lymphocytes. Interacts with the MHC class I HLA-A/B2M dimer. One HLA-A molecule (mainly via nonpolymorphic alpha-3 domain) interacts with one CD8A homodimer (via CDR-like loop). Interacts with LCK in a zinc-dependent manner. Interacts with HLA-G; this interaction is direct and might down-regulate T cell receptor signaling.

研究領域

· Environmental Information Processing > Signaling molecules and interaction > Cell adhesion molecules (CAMs).   (View pathway)

· Human Diseases > Immune diseases > Primary immunodeficiency.

· Organismal Systems > Immune system > Antigen processing and presentation.   (View pathway)

· Organismal Systems > Immune system > Hematopoietic cell lineage.   (View pathway)

· Organismal Systems > Immune system > T cell receptor signaling pathway.   (View pathway)

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