该基因编码的蛋白是toll样受体（toll-like receptor，tlr）家族的一员，在病原体识别和天然免疫激活中起着重要作用。从果蝇到人类，tlr高度保守，结构和功能相似。它们识别病原体相关的分子模式，在传染源上表达，并介导细胞因子的产生，这些细胞因子是发展有效免疫所必需的。不同的tlr表现出不同的表达模式。该受体与大多数革兰氏阴性菌脂多糖（lps）诱导的信号转导事件有关。该基因突变与lps反应性的差异有关。已发现该基因编码不同亚型的多个转录变体。
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 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 receptor has been implicated in signal transduction events induced by lipopolysaccharide (LPS) found in most gram-negative bacteria. Mutations in this gene have been associated with differences in LPS responsiveness. Multiple transcript variants encoding different isoforms have been found for this gene.
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