Ubiquitination/ Proteasome
Ubiquitination is a process in targeting proteins for degradation by the proteasome. Ubiquitin (Ub) is a 76 amino acid polypeptide which can be covalently attached to various cellular proteins by the ubiquitination process. This ubiquitin-proteasome system plays a vital role in cell division, growth, differentiation, transcriptional regulation, apoptosis and immunity etc. Three main types of enzymes are involved in the process of ubiquitination. In the first step, activation of ubiquitin is carried out by ubiquitin-activating enzyme (E1) through an ATP-dependent reaction. In the second step, the activated ubiquitin is transferred from E1 to ubiquitin-conjugating enzyme (E2). In the final step, the ubiquitin protein ligase (E3) is required for labeling the ubiquitin to target substrate protein. An isopeptide bond is formed between the carboxyl terminus of ubiquitin and the ε-amino group of a lysine residue in the target protein.
Once the substrate protein is labeled, proteasome will bind to a polyubiquitin chain, allowing the degradation of the labeled protein. The polyubiquitinated target protein is then recognized and degraded by the 26S proteasome. Deubiquitinating enzymes (DUBs) reverse the process of ubiquitination by removing ubiquitin from its substrate protein. Dysregulation of the ubiquitin-proteasome system has been linked to cancer, diabetes, cardiovascular and neurodegenerative diseases etc.
- B1397 Trifluoperazine 2HCl中文名: 盐酸三氟拉嗪Summary: 多巴胺D2受体抑制剂
- B1307 SJB3-019ATarget: USPSummary: Usp1抑制剂
- B1317 ML-323Target: Deubiquitinating enzymes (DUBs)Summary: USP1-UAF1抑制剂
- B1097 HBX 19818
- B2168 NMS-8733 CitationTarget: Valosin-containing protein (VCP)Summary: VCP/p97抑制剂
- B1492 PYR-412 CitationTarget: ProteasomeSummary: 泛素活化酶(E1)抑制剂
- A8813 NSC697923Target: Ub-conjugating enzyme (E2) complexSummary: E2复合体Ubc13-Uev1A抑制剂
- A8661 MNS中文名: 3,4-亚甲二氧-beta-硝基苯乙烯Summary: Src/Syk酪氨酸激酶抑制剂
- A8633 Concanamycin A1 Citation中文名: 卡那霉素ATarget: Vacuolar-type ATPaseSummary: V型(液泡)H +-ATP酶抑制剂
- A8632 (±)-Bay K 8644Summary: L型Ca2+通道激活剂