MS4A2(膜跨域4A2)属于膜跨域4A(MS4A)基因家族,该家族编码具有四个跨膜结构域的蛋白质,通常参与细胞信号传导和免疫调节。MS4A2基因编码高亲和力IgE受体β链(FcεRIβ),主要在肥大细胞和嗜碱性粒细胞中表达,是过敏反应的关键分子。FcεRIβ与IgE受体α链和γ链结合形成复合物,当IgE与过敏原结合时触发肥大细胞脱颗粒,释放组胺等炎症介质,导致过敏症状如哮喘、湿疹和过敏性鼻炎。MS4A2基因突变(如Ile181Leu)可能增强受体信号传导,增加过敏性疾病风险。MS4A2过表达会加剧过敏反应和炎症,而表达降低可能减弱过敏反应但增加感染风险。MS4A基因家族成员(如MS4A1/CD20、MS4A4A)多参与免疫调节,部分成员与癌症相关。MS4A2在过敏性疾病诊断和治疗中具有潜力,针对FcεRI的单抗(如奥马珠单抗)已用于哮喘治疗。
The allergic response involves the binding of allergen to receptor-bound IgE followed by cell activation and the release of mediators responsible for the manifestations of allergy. The IgE-receptor, a tetramer composed of an alpha, beta, and 2 disulfide-linked gamma chains, is found on the surface of mast cells and basophils. This gene encodes the beta subunit of the high affinity IgE receptor which is a member of the membrane-spanning 4A gene family. Members of this nascent protein family are characterized by common structural features and similar intron/exon splice boundaries and display unique expression patterns among hematopoietic cells and nonlymphoid tissues. This family member is localized to 11q12, among a cluster of membrane-spanning 4A gene family members. Alternative splicing results in multiple transcript variants encoding distinct proteins. Additional transcript variants have been described but require experimental validation. [provided by RefSeq, Mar 2012]
的过敏反应包括过敏原的结合到受体结合的IgE随后细胞活化和负责过敏的表现介质的释放。的的IgE受体,α,β和2二硫键连接的γ链组成的四聚体,是肥大细胞和嗜碱性粒细胞的表面上发现。该基因编码的高亲和力IgE受体这是跨膜4A基因家族的一个成员的β亚基。这个新生蛋白家族成员的特征在于共同结构特征和相似的内含子/外显子剪接的边界,并显示造血细胞和非淋巴组织中的独特的表达模式。这个家庭成员定位于11q12,跨膜4A基因家族成员的集群中。在多个转录剪接变异体导致编码不同的蛋白质。额外转录变异体已经描述,但需要的实验验证。 [由RefSeq的,2012年3月提供]
MS4A2基因(以及对应的蛋白质)的细胞分布位置:
MS4A2基因的本体(GO)信息:
名称 |
---|
4071 Sphingolipid signaling pathway [PATH:hsa04071] |
4664 Fc epsilon RI signaling pathway [PATH:hsa04664] |
5310 Asthma [PATH:hsa05310] |
名称 |
---|
Fc epsilon receptor (FCERI) signaling |
Immune System |
Innate Immune System |
疾病名称 | 关系值 | NofPmids | NofSnps | 来源 |
Immediate hypersensitivity | 0.122367032 | 2 | 0 | CTD_human_GAD |
Drug Allergy | 0.122367032 | 3 | 0 | CTD_human_GAD |
Asthma, Aspirin-Induced | 0.122367032 | 2 | 0 | CTD_human_GAD |
IgE RESPONSIVENESS, ATOPIC | 0.12 | 0 | 0 | CTD_human |
Asthma | 0.055222385 | 35 | 23 | BeFree_GAD_LHGDN |
Atopy | 0.014202192 | 6 | 0 | GAD |
Inflammation | 0.009468128 | 4 | 0 | GAD |
Pneumonia | 0.005091382 | 2 | 0 | GAD_LHGDN |
Diabetes Mellitus, Non-Insulin-Dependent | 0.004734064 | 2 | 0 | GAD |
Dermatitis, Atopic | 0.003181358 | 4 | 0 | BeFree_GAD |
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