ANPEP(也称为CD13或氨肽酶N)是一种位于细胞膜上的锌依赖性金属蛋白酶,属于M1氨肽酶家族。该基因编码的蛋白广泛表达于多种组织,如肠道、肾脏和免疫细胞(如中性粒细胞和巨噬细胞)。ANPEP的主要功能是通过切割蛋白质N末端的氨基酸参与肽类激素的代谢、免疫调节和血管活性物质的调控。它在炎症反应、血管生成和肿瘤微环境中发挥重要作用,并与病毒感染(如冠状病毒)的细胞入侵机制相关。ANPEP基因突变可能导致酶活性异常,与某些遗传性疾病(如家族性发热综合征)或肿瘤发展相关。过表达ANPEP常见于多种癌症(如白血病、肝癌),促进肿瘤侵袭和转移,而降低表达可能影响免疫细胞功能或血管生成。M1氨肽酶家族成员均具有保守的锌结合位点(HEXXH基序)和跨膜结构域,主要参与肽类降解和信号转导。该家族还包括其他成员如ERAP1和LTA4H,共同调控炎症、血压和抗原呈递等生理过程。ANPEP的活性受pH值和金属离子浓度影响,其抑制剂(如bestatin)被用于癌症和免疫疾病的治疗研究。
Aminopeptidase N is located in the small-intestinal and renal microvillar membrane, and also in other plasma membranes. In the small intestine aminopeptidase N plays a role in the final digestion of peptides generated from hydrolysis of proteins by gastric and pancreatic proteases. Its function in proximal tubular epithelial cells and other cell types is less clear. The large extracellular carboxyterminal domain contains a pentapeptide consensus sequence characteristic of members of the zinc-binding metalloproteinase superfamily. Sequence comparisons with known enzymes of this class showed that CD13 and aminopeptidase N are identical. The latter enzyme was thought to be involved in the metabolism of regulatory peptides by diverse cell types, including small intestinal and renal tubular epithelial cells, macrophages, granulocytes, and synaptic membranes from the CNS. Human aminopeptidase N is a receptor for one strain of human coronavirus that is an important cause of upper respiratory tract infections. Defects in this gene appear to be a cause of various types of leukemia or lymphoma. [provided by RefSeq, Jul 2008]
氨肽酶N位于小肠,肾微绒毛膜,以及在其它等离子体膜。在小肠中氨肽酶N起着通过胃和胰蛋白酶从蛋白质水解产生的肽的最终消化的作用。它在近端肾小管上皮细胞和其他细胞类型的功能是不太清楚。大外域羧基含有锌结合金属蛋白酶家族成员的五肽共有序列的特征。与此类已知的酶序列比较表明,CD13和氨肽酶N是相同的。后者酶被认为参与调节肽由不同类型的细胞,包括小肠和肾小管上皮细胞,巨噬细胞,粒细胞,以及从中枢神经系统突触膜的代谢。人类氨肽酶N为人类冠状之一菌株是上呼吸道感染的重要原因的受体。在这个基因的缺陷似乎是各种类型的白血病或淋巴瘤的一个原因。 [由RefSeq的,2008年7月提供]
ANPEP基因(以及对应的蛋白质)的细胞分布位置:
ANPEP基因的本体(GO)信息:
名称 |
---|
480 Glutathione metabolism [PATH:hsa00480] |
4640 Hematopoietic cell lineage [PATH:hsa04640] |
4614 Renin-angiotensin system [PATH:hsa04614] |
名称 |
---|
Metabolism of Angiotensinogen to Angiotensins |
Metabolism of proteins |
Peptide hormone metabolism |
疾病名称 | 关系值 | NofPmids | NofSnps | 来源 |
Bladder Neoplasm | 0.12 | 1 | 0 | CTD_human |
Leukemia, Myelocytic, Acute | 0.010053281 | 28 | 0 | BeFree_LHGDN |
leukemia | 0.005981653 | 12 | 0 | BeFree_LHGDN |
Hypertensive disease | 0.005091382 | 2 | 0 | GAD_LHGDN |
Acute Promyelocytic Leukemia | 0.00408156 | 6 | 0 | BeFree_LHGDN |
Lymphoma | 0.003810118 | 5 | 0 | BeFree_LHGDN |
Myeloid Leukemia, Chronic | 0.003810118 | 5 | 0 | BeFree_LHGDN |
melanoma | 0.003538676 | 4 | 0 | BeFree_LHGDN |
Chronic Lymphocytic Leukemia | 0.003538676 | 3 | 0 | BeFree_LHGDN |
Acute lymphocytic leukemia | 0.003528744 | 13 | 0 | BeFree |
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