LCK(淋巴细胞特异性蛋白酪氨酸激酶)是一种属于Src家族激酶的基因,主要表达于T细胞和自然杀伤细胞(NK细胞)中。它的编码产物是一种非受体型酪氨酸激酶,在T细胞受体(TCR)信号传导中起核心作用。LCK通过磷酸化TCR复合物中的CD3链和ZAP-70激酶来启动下游信号通路,这对T细胞的发育、激活和功能至关重要。LCK蛋白结构包含SH3、SH2和激酶结构域,其活性受自身磷酸化状态调控,特别是Tyr394(激活)和Tyr505(抑制)位点。LCK基因突变可能导致其功能异常,与多种免疫缺陷疾病和癌症相关。功能丧失性突变会引起严重的联合免疫缺陷(如SCID),而激活突变则可能导致T细胞白血病等恶性肿瘤。LCK过表达会增强T细胞信号传导,可能导致自身免疫疾病或T细胞过度增殖;而表达降低则会导致T细胞功能缺陷,增加感染风险。LCK属于Src家族激酶基因家族,该家族成员均为非受体型酪氨酸激酶,参与调控细胞生长、分化、迁移和存活等过程,均含有SH2、SH3和激酶结构域,并通过磷酸化状态调节活性。Src家族激酶在多种细胞信号通路中发挥关键作用,其异常与癌症、免疫疾病和神经系统疾病密切相关。LCK作为该家族中T细胞特异性的成员,其功能研究为开发免疫调节药物和癌症治疗靶点提供了重要依据。
This gene is a member of the Src family of protein tyrosine kinases (PTKs). The encoded protein is a key signaling molecule in the selection and maturation of developing T-cells. It contains N-terminal sites for myristylation and palmitylation, a PTK domain, and SH2 and SH3 domains which are involved in mediating protein-protein interactions with phosphotyrosine-containing and proline-rich motifs, respectively. The protein localizes to the plasma membrane and pericentrosomal vesicles, and binds to cell surface receptors, including CD4 and CD8, and other signaling molecules. Multiple alternatively spliced variants, encoding the same protein, have been described. [provided by RefSeq, Jul 2008]
该基因是Src家族的蛋白酪氨酸激酶(PTK的)的成员。所编码的蛋白质是在选择和开发的T细胞的成熟的关键信号分子。它包含了十四烷基化和palmitylation,一个PTK域的N-末端位点,这是参与介导蛋白质 - 蛋白质相互作用与含有磷酸酪氨酸和富含脯氨酸的基序,分别SH2和SH3结构域。该蛋白质定位于质膜和pericentrosomal囊泡,和结合至细胞表面受体,包括CD4和CD8,和其他信号分子。多个可变剪接变体,编码相同的蛋白质,已经描述。 [由RefSeq的,2008年7月提供]
LCK基因(以及对应的蛋白质)的细胞分布位置:
LCK基因的本体(GO)信息:
名称 |
---|
4064 NF-kappa B signaling pathway [PATH:hsa04064] |
4650 Natural killer cell mediated cytotoxicity [PATH:hsa04650] |
4660 T cell receptor signaling pathway [PATH:hsa04660] |
4380 Osteoclast differentiation [PATH:hsa04380] |
5340 Primary immunodeficiency [PATH:hsa05340] |
5166 HTLV-I infection [PATH:hsa05166] |
名称 |
---|
Adaptive Immune System |
CD28 co-stimulation |
CD28 dependent PI3K/Akt signaling |
CD28 dependent Vav1 pathway |
Cell surface interactions at the vascular wall |
Constitutive Signaling by Aberrant PI3K in Cancer |
Costimulation by the CD28 family |
CTLA4 inhibitory signaling |
Cytokine Signaling in Immune system |
DAP12 interactions |
DAP12 signaling |
Disease |
Diseases of signal transduction |
Downstream signal transduction |
Downstream signaling events of B Cell Receptor (BCR) |
Downstream signaling of activated FGFR1 |
Downstream signaling of activated FGFR2 |
Downstream signaling of activated FGFR3 |
Downstream signaling of activated FGFR4 |
Downstream TCR signaling |
Fc epsilon receptor (FCERI) signaling |
GAB1 signalosome |
Generation of second messenger molecules |
GPVI-mediated activation cascade |
Hemostasis |
HIV Infection |
Host Interactions of HIV factors |
Immune System |
Infectious disease |
Innate Immune System |
Interleukin-2 signaling |
Nef and signal transduction |
Nef Mediated CD4 Down-regulation |
Nef-mediates down modulation of cell surface receptors by recruiting them to clathrin adapters |
NGF signalling via TRKA from the plasma membrane |
PD-1 signaling |
PECAM1 interactions |
Phosphorylation of CD3 and TCR zeta chains |
PI-3K cascade:FGFR1 |
PI-3K cascade:FGFR2 |
PI-3K cascade:FGFR3 |
PI-3K cascade:FGFR4 |
PI3K events in ERBB2 signaling |
PI3K events in ERBB4 signaling |
PI3K/AKT activation |
PI3K/AKT Signaling in Cancer |
PIP3 activates AKT signaling |
Platelet activation, signaling and aggregation |
Regulation of KIT signaling |
Role of LAT2/NTAL/LAB on calcium mobilization |
Signal Transduction |
Signaling by EGFR |
Signaling by ERBB2 |
Signaling by ERBB4 |
Signaling by FGFR |
Signaling by FGFR1 |
Signaling by FGFR2 |
Signaling by FGFR3 |
Signaling by FGFR4 |
Signaling by Interleukins |
Signaling by PDGF |
Signaling by SCF-KIT |
Signaling by the B Cell Receptor (BCR) |
Signalling by NGF |
TCR signaling |
The role of Nef in HIV-1 replication and disease pathogenesis |
Translocation of ZAP-70 to Immunological synapse |
疾病名称 | 关系值 | NofPmids | NofSnps | 来源 |
IMMUNODEFICIENCY 22 | 0.24 | 1 | 0 | ORPHANET_UNIPROT |
HIV Infections | 0.083724241 | 7 | 0 | BeFree_GAD_RGD |
Allergic Conjunctivitis | 0.08 | 1 | 0 | RGD |
Anoxia | 0.0054487 | 2 | 0 | LHGDN |
Hepatitis C | 0.00272435 | 1 | 0 | LHGDN |
Mammary Neoplasms | 0.00272435 | 1 | 0 | LHGDN |
Disease Progression | 0.00272435 | 1 | 0 | LHGDN |
Lung diseases | 0.00272435 | 1 | 0 | LHGDN |
Tobacco Use Disorder | 0.002367032 | 1 | 0 | GAD |
Leukemia, T-Cell | 0.001085767 | 4 | 0 | BeFree |
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