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- 详细信息
- 文献和实验
- 技术资料
- 供应商:
上海研卉生物科技有限公司
- 库存:
大量
- 保存条件:
-20℃
- 英文名:
Cathepsin B Activity Assay Kit
- 规格:
100次分析
Kit Summary:
• Detection method- Fluorescence (Ex/Em 400/505) and fluorometer
• Sample type- Cell and tissue lysates
• Species reactivity- Mammalian
• Kit size- 100 assays
• Applications- Detects alternative proteolytic enzymes such as the lysosomal cathepsin proteases that can initiate or propagate proapoptotic signals.
Features & Benefits:
• Simple one-step procedure; takes only 1-2 hours
• Fast and convenient
• Cathepsin-B assay is straightforward, and can be adapted to 96-well plate assays.
Kit components:
• CB Cell Lysis Buffer
• CB Reaction Buffer
• CB Substrate Ac-RR-AFC (10 mM)
• CB Inhibitor (1 mM)
Description:
Apoptosis can be mediated by mechanisms other than the traditional caspase-mediated cleavage cascade. There is growing recognition that alternative proteolytic enzymes such as the lysosomal cathepsin proteases may initiate or propagate proapoptotic signals. Cathepsins are lysosomal enzymes that are also used as sensitive markers in various toxicological investigations. The Cathepsin-B Activity Assay kit is a fluorescence-based assay that utilizes the preferred cathepsin-B substrate sequence RR labeled with AFC (amino-4-trifluoromethyl coumarin). Cell lysates or other samples that contain cathepsin-B will cleave the synthetic substrate RR-AFC to release free AFC. The released AFC can easily be quantified using a fluorometer or fluorescence plate reader.
Storage Conditions:
-20°C
Shipping Conditions:
gel pack
USAGE: For Research Use Only! Not For Use in Humans.
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文献和实验Cancer Cell:曹雪涛院士团队揭示肿瘤相关巨噬细胞中葡萄糖代谢的增加可促进癌症转移
-GlcNAcylation)。有研究指出,O-GlcNAcylation 可调节巨噬细胞在病原体感染和炎症中发挥重要作用。然而,O-GlcNAcylation 是否以及如何促进 TAMs 的极化和对肿瘤进展的功能尚不清楚。 2022 年 9 月 8 日,曹雪涛院士领衔的团队在 Cancer Cell 发表了题为 Increased glucose metabolism in TAMs fuels O-GlcNAcylation of lysosomal Cathepsin B to promote cancer
被APC摄取后,细胞质膜将抗原包围,成为胞质中的内体(endosome)。初形成的内体向胞质深部移动并逐渐成熟,最终与初级溶酶体融合成为次级溶酶体或简称溶酶体(endosome)。内体/溶酶体内的酸性环境为各种酶类提供了适宜的作用条件,如蛋白酶、核酸酶、糖苷酶、脂酶和磷酸酶等,总数多达40余种。其中在外源性抗原加工中起重要作用的是组织蛋白酶(cathepsin,Cath)如CathI。和CathS。在这两种蛋白酶的作用下,外源性抗原被降解成肽段,其中一些长度为12~18个甚至长到30个氨基酸残基的肽
组织蛋白酶 cathepsin 在各种动物组织的细胞内(特别是溶酶体部分)发现的一类蛋白酶。此名源自希腊语的“消化”,为威尔斯达特( R. Willstā atter, 1929)命名的。来源于同一种类组织细胞的也是由组织蛋白酶 A. B. C. D. E等多种酶组成。可以根据所作用的代表性底物的种类进行分类,但似乎各自还有数种同工酶。组织蛋白酶 A的代表性底物是 N-苄氧基羰基 -L-谷酰胺 -L-苯丙氨酸,最适 pH约 5.5( 3— 6),可能是一种羧肽酶,可为二异丙基磷氟酸
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