PRKAA1(蛋白激酶AMP激活的催化亚基α1)是AMPK(AMP激活蛋白激酶)基因家族的重要成员,该家族还包括PRKAA2、PRKAB1、PRKAB2、PRKAG1、PRKAG2和PRKAG3。AMPK家族是一类高度保守的丝氨酸/苏氨酸蛋白激酶,在细胞能量代谢调控中起核心作用,能够感知细胞内AMP/ATP比例的变化并在能量不足时激活下游通路以恢复能量平衡。PRKAA1编码AMPK的α1催化亚基,负责磷酸化下游靶蛋白,其活性受AMP/ATP比例及上游激酶(如LKB1和CaMKKβ)调控。PRKAA1广泛表达于多种组织,尤其在代谢活跃的组织如肝脏、骨骼肌和大脑中表达较高。其主要功能包括促进葡萄糖摄取、脂肪酸氧化和线粒体生物发生,同时抑制蛋白质和脂质合成等耗能过程。PRKAA1的突变可能导致其功能异常,与多种代谢性疾病相关,如2型糖尿病、肥胖和非酒精性脂肪肝病,因为其功能受损会破坏能量稳态。此外,PRKAA1的异常表达还与癌症有关,因为在某些肿瘤中AMPK活性的丧失可能促进肿瘤生长,而在另一些情况下AMPK激活可能抑制肿瘤进展。PRKAA1过表达通常增强AMPK活性,促进分解代谢并抑制合成代谢,可能改善胰岛素敏感性和减少脂肪积累,但也可能导致过度分解引起肌肉消耗。PRKAA1表达降低则可能导致能量代谢紊乱,增加肥胖和胰岛素抵抗的风险,并可能加速肿瘤发生。PRKAA1还与其他基因如SIRT1、PGC-1α和mTOR相互作用,共同调节代谢和应激反应。例如,PRKAA1激活可以上调PGC-1α以增强线粒体功能,同时抑制mTOR信号以降低蛋白质合成。PRKAA1在抗衰老和神经保护中也发挥作用,其激活可能延长寿命并减少神经退行性疾病如阿尔茨海默病的病理变化。总之,PRKAA1是能量代谢调控的核心基因,其功能异常与多种重大疾病密切相关,是代谢性疾病和癌症治疗的潜在靶点。
The protein encoded by this gene belongs to the ser/thr protein kinase family. It is the catalytic subunit of the 5'-prime-AMP-activated protein kinase (AMPK). AMPK is a cellular energy sensor conserved in all eukaryotic cells. The kinase activity of AMPK is activated by the stimuli that increase the cellular AMP/ATP ratio. AMPK regulates the activities of a number of key metabolic enzymes through phosphorylation. It protects cells from stresses that cause ATP depletion by switching off ATP-consuming biosynthetic pathways. Alternatively spliced transcript variants encoding distinct isoforms have been observed. [provided by RefSeq, Jul 2008]
由该基因编码的蛋白质属于丝氨酸/苏氨酸蛋白激酶家族。它是5‘-黄金AMP活化蛋白激酶(AMPK)的催化亚基。 AMPK是在所有的真核细胞中保守的蜂窝能量传感器。 AMPK的激酶活性是由增加蜂窝AMP / ATP比刺激激活。 AMPK通过磷酸调节一些关键代谢酶的活动。它通过切断消耗ATP的生物合成途径可以防止引起ATP耗竭应力细胞。编码不同同种型的可变剪接转录物变体已观察到。 [由RefSeq的,2008年7月提供]
PRKAA1基因(以及对应的蛋白质)的细胞分布位置:
PRKAA1基因的本体(GO)信息:
名称 |
---|
4068 FoxO signaling pathway [PATH:hsa04068] |
4151 PI3K-Akt signaling pathway [PATH:hsa04151] |
4152 AMPK signaling pathway [PATH:hsa04152] |
4150 mTOR signaling pathway [PATH:hsa04150] |
4140 Regulation of autophagy [PATH:hsa04140] |
4910 Insulin signaling pathway [PATH:hsa04910] |
4922 Glucagon signaling pathway [PATH:hsa04922] |
4920 Adipocytokine signaling pathway [PATH:hsa04920] |
4921 Oxytocin signaling pathway [PATH:hsa04921] |
4710 Circadian rhythm [PATH:hsa04710] |
5410 Hypertrophic cardiomyopathy (HCM) [PATH:hsa05410] |
4932 Non-alcoholic fatty liver disease (NAFLD) [PATH:hsa04932] |
名称 |
---|
Energy dependent regulation of mTOR by LKB1-AMPK |
Gene Expression |
Generic Transcription Pathway |
IGF1R signaling cascade |
Insulin receptor signalling cascade |
IRS-mediated signalling |
IRS-related events |
IRS-related events triggered by IGF1R |
mTOR signalling |
PI3K Cascade |
PKB-mediated events |
Regulation of AMPK activity via LKB1 |
Regulation of Rheb GTPase activity by AMPK |
Signaling by Insulin receptor |
Signaling by Type 1 Insulin-like Growth Factor 1 Receptor (IGF1R) |
TP53 Regulates Metabolic Genes |
Transcriptional Regulation by TP53 |
疾病名称 | 关系值 | NofPmids | NofSnps | 来源 |
Insulin Resistance | 0.2 | 2 | 0 | CTD_human_RGD |
Stomach Neoplasms | 0.122367032 | 2 | 1 | CTD_human_GAD |
Malignant neoplasm of stomach | 0.121900093 | 7 | 2 | BeFree_GWASCAT |
Impaired glucose tolerance | 0.12 | 1 | 0 | CTD_human |
Diabetes Mellitus, Non-Insulin-Dependent | 0.083995683 | 8 | 0 | BeFree_GAD_RGD |
Complications of Diabetes Mellitus | 0.08 | 1 | 0 | RGD |
Diabetes Mellitus | 0.003995683 | 7 | 0 | BeFree_GAD |
Obesity | 0.002985861 | 11 | 0 | BeFree |
Anoxia | 0.00272435 | 1 | 0 | LHGDN |
ovarian neoplasm | 0.00272435 | 1 | 0 | LHGDN |
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