TLR2(Toll样受体2,Toll-like receptor 2)是一种模式识别受体(PRR,pattern recognition receptor),属于TLR基因家族。该家族共有10个成员(TLR1-TLR10),均通过识别病原体相关分子模式(PAMP,pathogen-associated molecular patterns)激活先天免疫反应。TLR2主要表达于免疫细胞(如巨噬细胞、树突细胞)及上皮细胞表面,通过识别细菌的脂蛋白、肽聚糖等成分触发炎症反应。其功能特点是形成异源二聚体(如与TLR1或TLR6结合)以扩大识别范围。TLR2激活后通过MyD88依赖的信号通路诱导NF-κB和促炎因子(如TNF-α、IL-6)的产生。突变可能导致免疫缺陷(如反复感染)或过度炎症(如TLR2 D299G突变与哮喘相关)。该基因与多种疾病相关:过表达可能加剧自身免疫病(类风湿关节炎)、动脉粥样硬化和败血症;低表达则增加结核病、莱姆病等感染风险。TLR2还影响肠道菌群平衡,其表达异常可能引发代谢综合征。基因家族共性包括:均含富含亮氨酸重复序列(LRR,leucine-rich repeats)的胞外域和TIR(Toll/IL-1 receptor)胞内域,通过保守信号通路调控免疫应答。
The protein encoded by this gene is a member of the Toll-like receptor (TLR) family which plays a fundamental role in pathogen recognition and activation of innate immunity. TLRs are highly conserved from Drosophila to humans and share structural and functional similarities. They recognize pathogen-associated molecular patterns (PAMPs) that are expressed on infectious agents, and mediate the production of cytokines necessary for the development of effective immunity. The various TLRs exhibit different patterns of expression. This gene is expressed most abundantly in peripheral blood leukocytes, and mediates host response to Gram-positive bacteria and yeast via stimulation of NF-kappaB. [provided by RefSeq, Jul 2008]
由该基因编码的蛋白是Toll样受体(TLR)家族中起着病原体识别和先天免疫激活的基础性作用的成员。 Toll样受体是高度果蝇保守到人类和共享结构和功能的相似性。他们认识到是在感染剂表达的病原体相关分子模式(PAMP),并介导的生产所必需的有效免疫的发展细胞因子。各种Toll样受体表现出不同的表达模式。该基因被表达在外周血白细胞最丰富,并且介导宿主反应革兰氏阳性菌和酵母通过NF-κB的刺激ST。 [由RefSeq的,2008年7月提供]
TLR2基因(以及对应的蛋白质)的细胞分布位置:
TLR2基因的本体(GO)信息:
名称 |
---|
4151 PI3K-Akt signaling pathway [PATH:hsa04151] |
4145 Phagosome [PATH:hsa04145] |
4620 Toll-like receptor signaling pathway [PATH:hsa04620] |
5205 Proteoglycans in cancer [PATH:hsa05205] |
5323 Rheumatoid arthritis [PATH:hsa05323] |
5321 Inflammatiory bowel disease (IBD) [PATH:hsa05321] |
5134 Legionellosis [PATH:hsa05134] |
5152 Tuberculosis [PATH:hsa05152] |
5162 Measles [PATH:hsa05162] |
5161 Hepatitis B [PATH:hsa05161] |
5168 Herpes simplex infection [PATH:hsa05168] |
5146 Amoebiasis [PATH:hsa05146] |
5144 Malaria [PATH:hsa05144] |
5145 Toxoplasmosis [PATH:hsa05145] |
5140 Leishmaniasis [PATH:hsa05140] |
5142 Chagas disease (American trypanosomiasis) [PATH:hsa05142] |
名称 |
---|
Activated TLR4 signalling |
Beta defensins |
Defensins |
Disease |
Diseases associated with the TLR signaling cascade |
Diseases of Immune System |
Innate Immune System |
IRAK4 deficiency (TLR2/4) |
MyD88 deficiency (TLR2/4) |
MyD88:Mal cascade initiated on plasma membrane |
Toll Like Receptor 2 (TLR2) Cascade |
Toll Like Receptor 4 (TLR4) Cascade |
Toll Like Receptor TLR1:TLR2 Cascade |
Toll Like Receptor TLR6:TLR2 Cascade |
Toll-Like Receptors Cascades |
疾病名称 | 关系值 | NofPmids | NofSnps | 来源 |
Inflammation | 0.221080165 | 10 | 0 | CTD_human_GAD_LHGDN_RGD |
Keratitis | 0.201085767 | 6 | 0 | BeFree_CTD_human_RGD |
Reperfusion Injury | 0.2 | 2 | 0 | CTD_human_RGD |
Rheumatoid Arthritis | 0.138250076 | 25 | 1 | BeFree_CTD_human_GAD_LHGDN |
Leprosy | 0.131639663 | 10 | 1 | BeFree_CTD_human_GAD |
Staphylococcal Infections | 0.125276948 | 3 | 1 | BeFree_CTD_human_GAD |
Colorectal Neoplasms | 0.122995792 | 3 | 0 | BeFree_CTD_human_LHGDN |
Cardiomyopathies | 0.12 | 1 | 0 | CTD_human |
MYCOBACTERIUM TUBERCULOSIS, SUSCEPTIBILITY TO (finding) | 0.12 | 0 | 1 | CLINVAR |
Eye Infections, Bacterial | 0.12 | 1 | 0 | CTD_human |
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