VAV1是一种重要的信号转导蛋白,属于VAV基因家族(包括VAV1、VAV2和VAV3),该家族成员均为鸟苷酸交换因子(GEFs),能够激活Rho家族GTP酶(如Rac1、RhoA和Cdc42),从而调控细胞骨架重组、细胞迁移和免疫细胞活化等过程。VAV1主要在造血细胞(如T细胞、B细胞和自然杀伤细胞)中表达,其核心功能是通过T细胞受体(TCR)或B细胞受体(BCR)传递信号,促进免疫细胞的发育、增殖和效应功能。VAV1蛋白结构包含多个功能域,如DH域(负责GEF活性)、PH域(介导膜定位)和SH2域(结合磷酸化酪氨酸),这些结构使其能够整合多种上游信号并激活下游通路。VAV1突变或功能异常可能导致免疫缺陷或自身免疫疾病,例如某些T细胞功能不全综合征或类风湿性关节炎。研究发现,VAV1的过度表达可能增强免疫细胞活性,但同时也可能增加自身免疫风险或促进某些血液系统恶性肿瘤(如T细胞白血病)的发生;而VAV1表达降低则可能导致免疫应答减弱,增加感染易感性。在癌症中,VAV1的异常激活可通过促进细胞侵袭和转移参与肿瘤进展。VAV基因家族的共性在于均含有保守的GEF结构域,并能通过调控Rho GTP酶影响细胞形态和运动,但各成员的组织分布和具体功能存在差异(如VAV2/VAV3在非造血组织中更广泛表达)。此外,VAV1还参与调控NF-κB和MAPK等关键信号通路,其功能紊乱与炎症性疾病、过敏反应和癌症免疫逃逸密切相关。
This gene is a member of the VAV gene family. The VAV proteins are guanine nucleotide exchange factors (GEFs) for Rho family GTPases that activate pathways leading to actin cytoskeletal rearrangements and transcriptional alterations. The encoded protein is important in hematopoiesis, playing a role in T-cell and B-cell development and activation. The encoded protein has been identified as the specific binding partner of Nef proteins from HIV-1. Coexpression and binding of these partners initiates profound morphological changes, cytoskeletal rearrangements and the JNK/SAPK signaling cascade, leading to increased levels of viral transcription and replication. Alternatively spliced transcript variants encoding multiple isoforms have been observed for this gene. [provided by RefSeq, Apr 2012]
此基因是VAV基因家族的一个成员。在变风量的蛋白质是该激活通路,导致肌动蛋白细胞骨架重排和转录改变Rho家族GTP酶鸟嘌呤核苷酸交换因子(环基金)。所编码的蛋白质是造血的重要,打在T细胞和B细胞发育和活化的作用。所编码的蛋白质已被鉴定为来自HIV-1的Nef蛋白的特异性结合配偶体。共表达和这些伙伴结合发起深刻形态变化,细胞骨架重排和JNK / SAPK信号传导级联,导致增加的病毒转录和复制的水平。编码多种亚型选择性剪接的转录物变体已经观察到这种基因。 [由RefSeq的,2012年4月提供]
VAV1基因(以及对应的蛋白质)的细胞分布位置:
VAV1基因的本体(GO)信息:
名称 |
---|
4024 cAMP signaling pathway [PATH:hsa04024] |
4810 Regulation of actin cytoskeleton [PATH:hsa04810] |
4510 Focal adhesion [PATH:hsa04510] |
4650 Natural killer cell mediated cytotoxicity [PATH:hsa04650] |
4660 T cell receptor signaling pathway [PATH:hsa04660] |
4662 B cell receptor signaling pathway [PATH:hsa04662] |
4664 Fc epsilon RI signaling pathway [PATH:hsa04664] |
4666 Fc gamma R-mediated phagocytosis [PATH:hsa04666] |
4670 Leukocyte transendothelial migration [PATH:hsa04670] |
4062 Chemokine signaling pathway [PATH:hsa04062] |
名称 |
---|
Adaptive Immune System |
Antigen activates B Cell Receptor (BCR) leading to generation of second messengers |
CD28 co-stimulation |
CD28 dependent Vav1 pathway |
Cell death signalling via NRAGE, NRIF and NADE |
Constitutive Signaling by Aberrant PI3K in Cancer |
Costimulation by the CD28 family |
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 |
Fc epsilon receptor (FCERI) signaling |
FCERI mediated Ca+2 mobilization |
FCERI mediated MAPK activation |
Fcgamma receptor (FCGR) dependent phagocytosis |
G alpha (12/13) signalling events |
GAB1 signalosome |
GPCR downstream signaling |
GPVI-mediated activation cascade |
Hemostasis |
Innate Immune System |
Interleukin-3, 5 and GM-CSF signaling |
NGF signalling via TRKA from the plasma membrane |
NRAGE signals death through JNK |
p75 NTR receptor-mediated signalling |
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 actin dynamics for phagocytic cup formation |
Regulation of signaling by CBL |
Rho GTPase cycle |
Role of LAT2/NTAL/LAB on calcium mobilization |
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 Rho GTPases |
Signaling by SCF-KIT |
Signaling by the B Cell Receptor (BCR) |
Signaling by VEGF |
Signalling by NGF |
VEGFA-VEGFR2 Pathway |
VEGFR2 mediated vascular permeability |
疾病名称 | 关系值 | NofPmids | NofSnps | 来源 |
Medulloblastoma | 0.120271442 | 2 | 0 | BeFree_CTD_human |
Adult T-Cell Lymphoma/Leukemia | 0.12 | 1 | 0 | CTD_human |
Endometriosis | 0.08 | 1 | 0 | RGD |
Diabetes Mellitus, Insulin-Dependent | 0.08 | 1 | 0 | RGD |
Lymphopenia | 0.08 | 1 | 0 | RGD |
Liver carcinoma | 0.08 | 1 | 0 | RGD |
leukemia | 0.003538676 | 4 | 0 | BeFree_LHGDN |
Adenocarcinoma | 0.003267234 | 2 | 0 | BeFree_LHGDN |
Common Variable Immunodeficiency | 0.003267234 | 2 | 0 | BeFree_LHGDN |
Neuroblastoma | 0.001085767 | 4 | 0 | BeFree |
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