CD22 cDNA ORF Clone, Human, untagged

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CD22 cDNA ORF Clone, Human, untagged: 产品信息

基因
种属
Human
NCBI 参考序列号
基因长度
2028 bp
序列特征
Identical with the Gene Bank Ref. ID sequence.
产品特征
Full length Clone DNA of Human CD22 molecule.
质粒
启动子
Enhanced CMV promoter
限制性酶切位点
HindIII + XbaI (6.1kb + 2.03kb)
测序引物
T7( 5' TAATACGACTCACTATAGGG 3' )
BGH( 5' TAGAAGGCACAGTCGAGG 3' )
质控
The plasmid is confirmed by full-length sequencing.
筛选
细菌筛选抗性
Ampicillin
细胞筛选抗性
Hygromycin
应用
Stable or Transient mammalian expression
储存 & 运输
运输方式
Each tube contains lyophilized plasmid.
储存条件
The lyophilized plasmid can be stored at ambient temperature for three months.

CD22 cDNA ORF 核苷酸序列及氨基酸序列信息

**Sino Biological guarantees 100% sequence accuracy of all synthetic DNA constructs we deliver, but we do not guarantee protein expression in your experimental system. Protein expression is influenced by many factors that may vary between experiments or laboratories.**

CD22 cDNA ORF Clone, Human, untagged: 别称

SIGLEC-2 cDNA ORF Clone, Human; SIGLEC2 cDNA ORF Clone, Human

CD22 背景信息

CD22 is a member of the immunoglobulin superfamily, SIGLEC family of lectins. It is first expressed in the cytoplasm of pro-B and pre-B cells, and on the surface as B cells mature to become IgD+. CD22 serves as an adhesion receptor for sialic acid-bearing ligands expressed on erythrocytes and all leukocyte classes. In addition to its potential role as a mediator of intercellular interactions, signal transduction through CD22 can activate B cells and modulate antigen receptor signaling in vitro. The phenotype of CD22-deficient mice suggests that CD22 is primarily involved in the generation of mature B cells within the bone marrow, blood, and marginal zones of lymphoid tissues. CD22 recruits the tyrosine phosphatase Src homology 2 domain-containing phosphatase 1 (SHP-1) to immunoreceptor tyrosine-based inhibitory motifs (ITIMs) and inhibits B-cell receptor (BCR)-induced Ca2+ signaling on normal B cells. CD22 interacts specifically with ligands carrying alpha2-6-linked sialic acids. As an inhibitory coreceptor of the B-cell receptor (BCR), CD22 plays a critical role in establishing signalling thresholds for B-cell activation. Like other coreceptors, the ability of CD22 to modulate B-cell signalling is critically dependent upon its proximity to the BCR, and this in turn is governed by the binding of its extracellular domain to alpha2,6-linked sialic acid ligands. However, genetic studies in mice reveal that some CD22 functions are regulated by ligand binding, whereas other functions are ligand-independent and may only require expression of an intact CD22 cytoplasmic domain at the B-cell surface. CD19 regulates CD22 phosphorylation by augmenting Lyn kinase activity, while CD22 inhibits CD19 phosphorylation via SHP-1.
全称
CD22 molecule
参考文献
  • Tedder TF, et al. (1997) CD22, a B lymphocyte-specific adhesion molecule that regulates antigen receptor signaling. Annu Rev Immunol. 15: 481-504.
  • Tedder TF, et al. (2005) CD22: a multifunctional receptor that regulates B lymphocyte survival and signal transduction. Adv Immunol. 88: 1-50.
  • Fujimoto M, et al. (2007) B cell signaling and autoimmune diseases: CD19/CD22 loop as a B cell signaling device to regulate the balance of autoimmunity. J Dermatol Sci. 46(1): 1-9.
  • Walker JA, et al. (2008) CD22: an inhibitory enigma. Immunology. 123(3): 314-25.
  • Nitschke L. (2009) CD22 and Siglec-G: B-cell inhibitory receptors with distinct functions. Immunol Rev. 230(1): 128-43.
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