KLRC1(Killer Cell Lectin-Like Receptor Subfamily C, Member 1)也称为NKG2A,属于C型凝集素样受体家族(NKG2家族),主要表达于自然杀伤(NK)细胞和部分T细胞表面。该基因编码的NKG2A蛋白与CD94形成异二聚体,共同识别非经典MHC I类分子HLA-E,传递抑制性信号以调节免疫细胞的杀伤活性,防止对正常细胞的攻击。NKG2A的胞内段含有免疫受体酪氨酸抑制基序(ITIM),当与HLA-E结合时,可招募磷酸酶抑制NK/T细胞的活化。该基因突变可能导致免疫调节异常,如自身免疫疾病或病毒感染易感性增加。在肿瘤微环境中,NKG2A的高表达会抑制NK细胞和细胞毒性T细胞的抗肿瘤功能,因此阻断NKG2A/HLA-E通路(如使用单抗monalizumab)已成为癌症免疫治疗的新策略。相反,若KLRC1表达降低,可能导致免疫系统过度激活,引发炎症或自身免疫反应。NKG2家族(包括NKG2A/C/E/D等)成员均与CD94结合,通过识别HLA-E参与免疫监视,但不同成员传递抑制性(如NKG2A)或激活性(如NKG2C)信号。在感染(如CMV感染后NKG2C+ NK细胞扩增)或妊娠期间(胎盘滋养层细胞高表达HLA-E),NKG2A的表达变化对维持免疫平衡至关重要。
Natural killer (NK) cells are lymphocytes that can mediate lysis of certain tumor cells and virus-infected cells without previous activation. They can also regulate specific humoral and cell-mediated immunity. The protein encoded by this gene belongs to the killer cell lectin-like receptor family, also called NKG2 family, which is a group of transmembrane proteins preferentially expressed in NK cells. This family of proteins is characterized by the type II membrane orientation and the presence of a C-type lectin domain. This protein forms a complex with another family member, KLRD1/CD94, and has been implicated in the recognition of the MHC class I HLA-E molecules in NK cells. The genes of NKG2 family members form a killer cell lectin-like receptor gene cluster on chromosome 12. Multiple alternatively spliced transcript variants encoding distinct isoforms have been observed. [provided by RefSeq, Jan 2015]
自然杀伤(NK)细胞是可介导某些肿瘤细胞和病毒感染细胞的裂解而不先前活化淋巴细胞。它们还可以调节特异性体液和细胞介导的??免疫。由该基因编码的蛋白质属于杀伤细胞凝集素样受体家族,也称为NKG2家族,这是一组在NK细胞中优先表达的跨膜蛋白。蛋白质的该家族的特征在于,II型膜取向和C型凝集素结构域的存在。此蛋白与其他家庭成员,KLRD1 / CD94复合物,并在识别中NK细胞的MHC I类HLA-E的分子有牵连。 NKG2家族成员的基因形成染色体上一个杀伤细胞凝集素样受体基因簇12.多幅可变剪接转录物变体编码不同同种型已被观察到。 [由RefSeq的,2015年1月提供]
KLRC1基因(以及对应的蛋白质)的细胞分布位置:
KLRC1基因的本体(GO)信息:
名称 |
---|
4650 Natural killer cell mediated cytotoxicity [PATH:hsa04650] |
4612 Antigen processing and presentation [PATH:hsa04612] |
5332 Graft-versus-host disease [PATH:hsa05332] |
名称 |
---|
Adaptive Immune System |
Immune System |
Immunoregulatory interactions between a Lymphoid and a non-Lymphoid cell |
疾病名称 | 关系值 | NofPmids | NofSnps | 来源 |
Infection | 0.0054487 | 2 | 0 | LHGDN |
Rheumatoid Arthritis | 0.005276948 | 2 | 0 | BeFree_GAD |
Behcet Syndrome | 0.005091382 | 1 | 0 | GAD_LHGDN |
Hepatitis B, Chronic | 0.002909916 | 2 | 0 | BeFree_GAD |
Hepatitis C, Chronic | 0.00272435 | 1 | 0 | LHGDN |
Tongue Neoplasms | 0.00272435 | 1 | 0 | LHGDN |
Hepatitis C | 0.00272435 | 1 | 0 | LHGDN |
leukemia | 0.00272435 | 1 | 0 | LHGDN |
Rheumatism | 0.002638474 | 1 | 0 | BeFree_GAD |
Spontaneous abortion | 0.002367032 | 1 | 0 | GAD |
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