CAMK2B(钙/钙调素依赖性蛋白激酶IIβ)是钙/钙调素依赖性蛋白激酶II(CaMKII)家族的重要成员,属于丝氨酸/苏氨酸蛋白激酶。该家族包括α、β、γ、δ四种亚型,共同特点是依赖钙离子(Ca²⁺)和钙调素(calmodulin)激活,通过磷酸化靶蛋白调控突触可塑性、学习记忆等神经功能。CAMK2B主要在神经元中表达,尤其富集于突触后致密区(PSD),其核心功能是解码钙信号并转化为长期突触强化(LTP)或弱化(LTD),这对大脑认知功能至关重要。当神经元内钙浓度升高时,CAMK2B被激活并发生自磷酸化,形成稳定的活性状态,进而磷酸化AMPA受体(如GluA1亚基)和NMDA受体,促进突触强度调节。该基因突变(如错义突变R292H)会导致激酶活性异常,与智力障碍、自闭症谱系障碍(ASD)和精神分裂症等神经发育疾病相关。过表达CAMK2B可能增强突触可塑性但诱发癫痫样放电,而表达降低则损害学习记忆能力,这与阿尔茨海默病(AD)中观察到的CAMK2B活性下降现象一致。此外,CAMK2B通过调控CREB(环磷腺苷反应元件结合蛋白)等转录因子影响其他基因表达,其功能紊乱可能破坏神经网络的稳态。该基因家族各亚型具有相似的多聚体结构和自主磷酸化特性,但组织分布和动力学特征存在差异,例如CAMK2A主要在 forebrain(前脑)主导学习记忆,而CAMK2B更广泛参与情绪调节等复杂行为。
The product of this gene belongs to the serine/threonine protein kinase family and to the Ca(2+)/calmodulin-dependent protein kinase subfamily. Calcium signaling is crucial for several aspects of plasticity at glutamatergic synapses. In mammalian cells, the enzyme is composed of four different chains: alpha, beta, gamma, and delta. The product of this gene is a beta chain. It is possible that distinct isoforms of this chain have different cellular localizations and interact differently with calmodulin. Alternative splicing results in multiple transcript variants. [provided by RefSeq, May 2014]
该基因的产物属于丝氨酸/苏氨酸蛋白激酶家族和对钙(2 +)/钙调蛋白依赖性蛋白激酶亚家族。钙信号是用于在谷氨酸突触可塑性的几个方面是至关重要的。在哺乳动物细胞中,所述酶是由四个不同的链:α,β,γ,和delta。这个基因的产物是一个β链。这可能是这种链的不同同种型具有不同的细胞定位,并与钙调蛋白相互作用不同。选择性剪接结果在多个抄本变形。 [由RefSeq的,2014年5月提供]
CAMK2B基因(以及对应的蛋白质)的细胞分布位置:
CAMK2B基因的本体(GO)信息:
| 名称 |
|---|
| 4012 ErbB signaling pathway [PATH:hsa04012] |
| 4310 Wnt signaling pathway [PATH:hsa04310] |
| 4066 HIF-1 signaling pathway [PATH:hsa04066] |
| 4020 Calcium signaling pathway [PATH:hsa04020] |
| 4024 cAMP signaling pathway [PATH:hsa04024] |
| 4114 Oocyte meiosis [PATH:hsa04114] |
| 4911 Insulin secretion [PATH:hsa04911] |
| 4922 Glucagon signaling pathway [PATH:hsa04922] |
| 4912 GnRH signaling pathway [PATH:hsa04912] |
| 4921 Oxytocin signaling pathway [PATH:hsa04921] |
| 4916 Melanogenesis [PATH:hsa04916] |
| 4261 Adrenergic signaling in cardiomyocytes [PATH:hsa04261] |
| 4971 Gastric acid secretion [PATH:hsa04971] |
| 4725 Cholinergic synapse [PATH:hsa04725] |
| 4728 Dopaminergic synapse [PATH:hsa04728] |
| 4720 Long-term potentiation [PATH:hsa04720] |
| 4722 Neurotrophin signaling pathway [PATH:hsa04722] |
| 4740 Olfactory transduction [PATH:hsa04740] |
| 4750 Inflammatory mediator regulation of TRP channels [PATH:hsa04750] |
| 4713 Circadian entrainment [PATH:hsa04713] |
| 5205 Proteoglycans in cancer [PATH:hsa05205] |
| 5214 Glioma [PATH:hsa05214] |
| 5031 Amphetamine addiction [PATH:hsa05031] |
| 5152 Tuberculosis [PATH:hsa05152] |
| 名称 |
|---|
| Activation of NMDA receptor upon glutamate binding and postsynaptic events |
| Cellular response to heat stress |
| Cellular responses to stress |
| CREB phosphorylation through the activation of CaMKII |
| CREB phosphorylation through the activation of Ras |
| Cytokine Signaling in Immune system |
| Glutamate Binding, Activation of AMPA Receptors and Synaptic Plasticity |
| HSF1-dependent transactivation |
| Immune System |
| Interferon gamma signaling |
| Interferon Signaling |
| Neuronal System |
| Neurotransmitter Receptor Binding And Downstream Transmission In The Postsynaptic Cell |
| Post NMDA receptor activation events |
| Ras activation uopn Ca2+ infux through NMDA receptor |
| Trafficking of AMPA receptors |
| Transmission across Chemical Synapses |
| Unblocking of NMDA receptor, glutamate binding and activation |
| 疾病名称 | 关系值 | NofPmids | NofSnps | 来源 |
| Schizophrenia | 0.1254487 | 3 | 0 | CTD_human_LHGDN |
| Metabolic Syndrome X | 0.122367032 | 1 | 1 | GAD_GWASCAT |
| Phencyclidine Abuse | 0.12 | 1 | 0 | CTD_human |
| Marijuana Abuse | 0.12 | 1 | 0 | CTD_human |
| Cocaine-Related Disorders | 0.12 | 1 | 0 | CTD_human |
| Psychoses, Substance-Induced | 0.12 | 1 | 0 | CTD_human |
| Degenerative polyarthritis | 0.12 | 1 | 1 | GWASCAT |
| Glioma | 0.00272435 | 1 | 0 | LHGDN |
| Weight Gain | 0.002367032 | 1 | 0 | GAD |
| Tobacco Use Disorder | 0.002367032 | 1 | 0 | GAD |
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