1. 重组蛋白
  2. STUB1 蛋白, Human (His)

STUB1蛋白是一种E3泛素蛋白连接酶,与ATXN3配合调节底物上的泛素链长度并防止链延伸。它通过 Hsp70/Hsp40 泛素化 NOS1 并调节伴侣复合物(Hsp70、Hsc70、Hsp90)。STUB1 蛋白, Human (His) 是重组的 STUB1 蛋白,由 E. coli 表达,带 His 标签。

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描述

STUB1 protein is an E3 ubiquitin protein ligase that cooperates with ATXN3 to regulate ubiquitin chain length on substrates and prevent chain extension. It ubiquitinates NOS1 through Hsp70/Hsp40 and regulates chaperone complexes (Hsp70, Hsc70, Hsp90). STUB1 Protein, Human (His) is the recombinant human-derived STUB1 protein, expressed by E. coli , with His tag.

研究背景

STUB1 蛋白是一种 E3 泛素蛋白连接酶,在靶向错误折叠的伴侣底物进行蛋白酶体降解方面发挥着关键作用,与 ATXN3 合作调节附着在 STUB1 底物上的泛素链长度并防止进一步的链延伸。它与 Hsp70Hsp40 一起泛素化 NOS1,调节 Hsp70、Hsc70 和 Hsp90 等关键伴侣复合物的活性。此外,STUB1 介导非规范短泛素链向 HSPA8 的转移,而不影响其降解。该蛋白通过催化 DNA 聚合酶 beta (POLB) 的多泛素化、放大 HUWE1/ARF-BP1 依赖性单泛素化并导致 POLB 降解来参与碱基切除修复。STUB1 还参与 CYP3A4 的多泛素化,泛素化 EPHA2 以潜在地调节受体稳定性,充当 HSPA1A 和 HSPA1B 的共伴侣,并通过泛素介导的降解调节 SMAD3 水平来负调节 TGF-β 信号传导。此外,STUB1 有助于 FOXP3、SIRT6 和 RIPK3 的降解,并可能下调 PD-L1/CD274 质膜表达。其多样化的功能强调了其在细胞稳态和免疫调节中的重要性。

种属

Human

表达系统

E. coli

标签

C-6*His

蛋白编号

Q9UNE7-1 (M1-Y303)

基因 ID

10273

蛋白结构
N-term
STUB1 (M1-Y303)
Accession # Q9UNE7
6*His
C-term
蛋白长度

Full Length

中文名
STUB1 蛋白
同用名
E3 Ubiquitin-Protein Ligase CHIP; Antigen NY-CO-7; CLL-Associated Antigen KW-8; Carboxy Terminus of Hsp70-Interacting Protein; STIP1 Homology and U Box-Containing Protein 1; STUB1; CHIP
氨基酸序列

MKGKEEKEGGARLGAGGGSPEKSPSAQELKEQGNRLFVGRKYPEAAACYGRAITRNPLVAVYYTNRALCYLKMQQHEQALADCRRALELDGQSVKAHFFLGQCQLEMESYDEAIANLQRAYSLAKEQRLNFGDDIPSALRIAKKKRWNSIEERRIHQESELHSYLSRLIAAERERELEECQRNHEGDEDDSHVRAQQACIEAKHDKYMADMDELFSQVDEKRKKRDIPDYLCGKISFELMREPCITPSGITYDRKDIEEHLQRVGHFDPVTRSPLTQEQLIPNLAMKEVIDAFISENGWVEDY

纯度

≥ 90%, as determined by reducing SDS-PAGE.

内毒素含量

<1 EU/μg, determined by LAL method.

文件资料
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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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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STUB1 Protein, Human (His)
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