1. 重组蛋白
  2. CAR-T related Proteins CD Antigens Receptor Proteins Biotinylated Proteins
  3. NK Cell CD Proteins Macrophage CD Proteins Stem Cell CD Proteins Dendritic Cell CD Proteins Siglec
  4. Siglec-3/CD33 Siglec-3/CD33
  5. Siglec-3/CD33 蛋白, Human (Biotinylated, HEK293, His-Avi)

Siglec-3/CD33 蛋白, Human (Biotinylated, HEK293, His-Avi)

目录号: HY-P701037
产品使用指南

Siglec-3/CD33 蛋白是一种唾液酸结合凝集素,可介导细胞间相互作用并维持免疫细胞静止。它更喜欢 α-2,3- 和更热衷 α-2,6- 连接的带有唾液酸的聚糖。配体结合后,CD33 的 ITIM 磷酸化,募集 PTPN6/SHP-1 和 PTPN11/SHP-2。这些磷酸酶由 Src 样激酶激活,调节下游通路,包括通过 PI3K 对单核细胞激活的抑制作用。CD33 还形成同二聚体,与 PTPN6/SHP-1 和 PTPN11/SHP-2 相互作用,并通过其 C 末端接合 C1QA,激活抑制基序。Siglec-3/CD33 蛋白, Human (Biotinylated, HEK293, His-Avi) 是重组的 Siglec-3/CD33 蛋白,由 HEK293 表达,带有 C-Avi, C-His 标签。Siglec-3/CD33 蛋白, Human (Biotinylated, HEK293, His-Avi) 全长 242 个氨基酸,分子量为 48-58 kDa。

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描述

Siglec-3/CD33 protein, a sialic-acid-binding lectin, mediates cell-cell interactions and maintains immune cell quiescence. It prefers alpha-2,3- and more avidly alpha-2,6-linked sialic acid-bearing glycans. Upon ligand engagement, CD33's ITIMs phosphorylate, recruiting PTPN6/SHP-1 and PTPN11/SHP-2. These phosphatases, activated by Src-like kinases, regulate downstream pathways, including the repressive effect on monocyte activation through PI3K. CD33 also forms homodimers, interacting with PTPN6/SHP-1 and PTPN11/SHP-2, and engages C1QA via its C-terminus, activating inhibitory motifs. Siglec-3/CD33 Protein, Human (Biotinylated, HEK293, His-Avi) is the recombinant human-derived Siglec-3/CD33 protein, expressed by HEK293, with C-Avi, C-His labeled tag. The total length of Siglec-3/CD33 Protein, Human (Biotinylated, HEK293, His-Avi) is 242 a.a., with molecular weight of 48-58 kDa.

研究背景

Siglec-3/CD33 蛋白是一种唾液酸结合免疫球蛋白样凝集素,在介导细胞间相互作用和维持免疫细胞处于静息状态方面发挥着至关重要的作用。它表现出对识别和结合 α-2,3- 和更热衷 α-2,6- 连接的唾液酸聚糖的偏好。在与 C1q 或唾液酸化糖蛋白等配体结合后,CD33 胞质尾部内的两个基于免疫受体酪氨酸的抑制基序 (ITIM) 会被 Src 样激酶(如 LCK)磷酸化。这些磷酸化的 ITIM 作为招募和激活蛋白酪氨酸磷酸酶 PTPN6/SHP-1 和 PTPN11/SHP-2 的对接位点,进而通过信号分子的去磷酸化调节下游通路。CD33 对单核细胞活化的抑制作用涉及磷酸肌醇 3-激酶/PI3K。在结构上,该蛋白通过二硫键形成同二聚体,并在磷酸化后与 PTPN6/SHP-1 和 PTPN11/SHP-2 相互作用。它还通过其 C 末端与 C1QA 结合,激活 CD33 抑制基序。

种属

Human

表达系统

HEK293

标签

C-Avi;C-His

蛋白编号

P20138-1 (D18-H259)

基因 ID

945  [NCBI]

蛋白结构
N-term
CD33 (D18-H259)
Accession # P20138-1
His-Avi
C-term
同用名
CD33 molecule; CD33; FLJ00391; gp67; Siglec3; Siglec-3; p67
分子量

48-58 kDa

纯度

Greater than 95% as determined by reducing SDS-PAGE.

内毒素含量

<1 EU/μg, determined by LAL method.

文件资料

Siglec-3/CD33 Protein, Human (Biotinylated, HEK293, His-Avi) 相关分类

Help & FAQs
  • Do most proteins show cross-species activity?

    Species cross-reactivity must be investigated individually for each product. Many human cytokines will produce a nice response in mouse cell lines, and many mouse proteins will show activity on human cells. Other proteins may have a lower specific activity when used in the opposite species.

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  • 重组蛋白稀释计算器

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The reconstitution calculator equation

Volume (to add to vial) = Mass (in vial) ÷ Desired Reconstitution Concentration

Volume (to add to vial) = Mass (in vial) ÷ Desired Reconstitution Concentration
= ÷

The dilution calculator equation

Concentration (start) × Volume (start) = Concentration (final) × Volume (final)

This equation is commonly abbreviated as: C1V1 = C2V2

浓度 (start) × 体积 (start) = 浓度 (final) × 体积 (final)
× = ×
C1   V1   C2   V2

The specific activity calculator equation

Specific Activity (Unit/mg) = 106 ÷ Biological Activity (ED50)

Specific Activity (Unit/mg) = 106 ÷ Biological Activity (ED50)
Unit/mg = 106 ÷ ng/mL

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