NOTCH4 是 NOTCH 基因家族的重要成员之一,该家族包括 NOTCH1、NOTCH2、NOTCH3 和 NOTCH4 四个基因。NOTCH 基因家族编码高度保守的跨膜受体蛋白,在细胞间通讯、胚胎发育、细胞分化、增殖和凋亡等过程中发挥关键作用。NOTCH4 主要在内皮细胞和血管系统中表达,参与血管生成和维持血管稳态。其表达产物是一种单次跨膜受体蛋白,通过与配体(如 Delta 或 Jagged 家族蛋白)结合激活下游信号通路,调控靶基因表达。NOTCH4 的功能异常与多种疾病相关,尤其是血管畸形和肿瘤。例如,NOTCH4 的突变或异常表达可能导致信号通路过度激活或抑制,从而影响血管发育,与遗传性出血性毛细血管扩张症(HHT)和某些癌症(如乳腺癌、胶质母细胞瘤)的发生发展密切相关。若 NOTCH4 过表达,可能促进血管过度增生,增加肿瘤血管生成,进而加速肿瘤生长和转移;而降低表达则可能导致血管发育缺陷或功能障碍,影响组织供氧和营养输送。此外,NOTCH4 与其他 NOTCH 家族成员功能部分冗余,但也具有独特的作用位点和调控机制。NOTCH 基因家族的共性包括依赖蛋白水解激活、通过 CSL(CBF1/RBP-Jκ)转录因子调控下游基因表达,并在多种发育和病理过程中发挥核心作用。研究 NOTCH4 的功能和调控机制对理解血管疾病和肿瘤的发病机理,以及开发靶向治疗策略具有重要意义。
This gene encodes a member of the Notch family. Members of this Type 1 transmembrane protein family share structural characteristics including an extracellular domain consisting of multiple epidermal growth factor-like (EGF) repeats, and an intracellular domain consisting of multiple, different domain types. Notch family members play a role in a variety of developmental processes by controlling cell fate decisions. The Notch signaling network is an evolutionarily conserved intercellular signaling pathway which regulates interactions between physically adjacent cells. In Drosophilia, notch interaction with its cell-bound ligands (delta, serrate) establishes an intercellular signaling pathway that plays a key role in development. Homologues of the notch-ligands have also been identified in human, but precise interactions between these ligands and the human notch homologues remain to be determined. This protein is cleaved in the trans-Golgi network, and presented on the cell surface as a heterodimer. This protein functions as a receptor for membrane bound ligands, and may play a role in vascular, renal and hepatic development. This gene may be associated with susceptibility to schizophrenia in a small portion of cases. An alternative splice variant has been described but its biological nature has not been determined. [provided by RefSeq, Jul 2008]
该基因编码所述Notch家族的一个成员。这种类型1的跨膜蛋白家族的成员共有的结构特征,包括由多个表皮生长因子样(EGF)的胞外域重复,和由多个不同的域类型的细胞内结构域。缺口家族成员通过控制细胞命运决定发挥各种发育过程中的作用。 Notch信号网络是其调节物理相邻细胞间的相互作用的进化上保守的细胞间信号传导途径。在Drosophilia,其细胞结合的配体(三角形,锯齿)缺口交互规定,起着发展的重要作用,细胞间信号通路。缺口配体的同系物也已在人确定,但这些配体与人Notch同源物之间的精确相互作用仍有待确定。这种蛋白质被裂解反式高尔基网络中,并呈现在细胞表面作为异二聚体上。该蛋白质的功能,作为膜结合配体的受体,和可能在血管,肾和肝发育的作用。该基因可以用易感性的情况下的一小部分被关联到精神分裂症。备选剪接变体已被描述,但其生物性质尚未确定。 [由RefSeq的,2008年7月提供]
NOTCH4基因(以及对应的蛋白质)的细胞分布位置:
NOTCH4基因的本体(GO)信息:
名称 |
---|
4330 Notch signaling pathway [PATH:hsa04330] |
4919 Thyroid hormone signaling pathway [PATH:hsa04919] |
4320 Dorso-ventral axis formation [PATH:hsa04320] |
5206 MicroRNAs in cancer [PATH:hsa05206] |
名称 |
---|
A third proteolytic cleavage releases NICD |
Gene Expression |
Generic Transcription Pathway |
NICD traffics to nucleus |
Notch-HLH transcription pathway |
Pre-NOTCH Expression and Processing |
Pre-NOTCH Processing in Golgi |
Pre-NOTCH Processing in the Endoplasmic Reticulum |
Pre-NOTCH Transcription and Translation |
Receptor-ligand binding initiates the second proteolytic cleavage of Notch receptor |
Signaling by NOTCH |
Signaling by NOTCH4 |
疾病名称 | 关系值 | NofPmids | NofSnps | 来源 |
Schizophrenia | 0.197169077 | 41 | 5 | BeFree_GAD_GWASCAT_LHGDN |
Mammary Neoplasms | 0.122995792 | 4 | 0 | BeFree_CTD_human_LHGDN |
Age related macular degeneration | 0.122638474 | 1 | 6 | BeFree_GAD_GWASCAT |
Systemic Scleroderma | 0.122638474 | 1 | 2 | BeFree_GAD_GWASCAT |
Asthma | 0.122367032 | 1 | 1 | GAD_GWASCAT |
Malignant neoplasm of prostate | 0.12 | 1 | 1 | GWASCAT |
Obesity | 0.12 | 1 | 1 | GWASCAT |
Hepatitis B, Chronic | 0.12 | 1 | 1 | GWASCAT |
Carcinoma, Pancreatic Ductal | 0.12 | 1 | 0 | CTD_human |
Arteriovenous Malformations, Cerebral | 0.08 | 0 | 0 | MGD |
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