PARP1(聚腺苷二磷酸核糖聚合酶1)是一种关键的DNA修复酶,属于PARP基因家族(包括PARP1、PARP2、PARP3等),该家族成员均参与DNA损伤修复和细胞应激反应。PARP1的主要功能是通过催化ADP核糖基化修饰靶蛋白(如组蛋白和DNA修复蛋白),促进单链断裂(SSB)的修复,维持基因组稳定性。此外,它还参与转录调控、炎症反应和细胞凋亡等过程。PARP1在细胞核中高度活跃,尤其在DNA损伤位点富集。PARP1突变可能导致其功能丧失,引发DNA修复缺陷,增加基因组不稳定性,与多种癌症(如乳腺癌、卵巢癌)和神经退行性疾病相关。PARP抑制剂(如奥拉帕尼)已用于治疗携带BRCA突变的癌症,通过“合成致死”效应选择性杀死癌细胞。PARP1过表达可能增强DNA修复能力,导致肿瘤细胞对放化疗产生耐药性;而低表达或抑制PARP1会加剧DNA损伤积累,引发细胞凋亡或衰老。PARP家族成员的共性是依赖NAD+催化ADP核糖基化反应,参与DNA损伤应答和染色质重塑。PARP1还与炎症性疾病(如败血症)和缺血再灌注损伤有关,因其过度激活会消耗NAD+,导致细胞能量衰竭。研究还发现PARP1通过调控NF-κB等信号通路影响免疫反应。
This gene encodes a chromatin-associated enzyme, poly(ADP-ribosyl)transferase, which modifies various nuclear proteins by poly(ADP-ribosyl)ation. The modification is dependent on DNA and is involved in the regulation of various important cellular processes such as differentiation, proliferation, and tumor transformation and also in the regulation of the molecular events involved in the recovery of cell from DNA damage. In addition, this enzyme may be the site of mutation in Fanconi anemia, and may participate in the pathophysiology of type I diabetes. [provided by RefSeq, Jul 2008]
本基因编码的染色质相关酶,聚(ADP-核糖基)转移酶,其由聚修改各种核蛋白质(ADP-核糖基)化。改性是依赖于DNA和参与多种重要的细胞过程,如分化,增殖和肿瘤转化和也参与细胞的DNA损伤的恢复的分子事件的调节的调节。此外,这种酶可以是在范可尼贫血突变的位点,并可能参与I型糖尿病的病理生理学。 [由RefSeq的,2008年7月提供]
PARP1基因(以及对应的蛋白质)的细胞分布位置:
PARP1基因的本体(GO)信息:
名称 |
---|
3410 Base excision repair [PATH:hsa03410] |
4064 NF-kappa B signaling pathway [PATH:hsa04064] |
名称 |
---|
Base Excision Repair |
DNA Repair |
Downregulation of SMAD2/3:SMAD4 transcriptional activity |
Gene Expression |
Generic Transcription Pathway |
Metabolism of proteins |
POLB-Dependent Long Patch Base Excision Repair |
Post-translational protein modification |
Resolution of Abasic Sites (AP sites) |
Resolution of AP sites via the multiple-nucleotide patch replacement pathway |
Signaling by TGF-beta Receptor Complex |
SUMO E3 ligases SUMOylate target proteins |
SUMOylation |
SUMOylation of DNA damage response and repair proteins |
Transcriptional activity of SMAD2/SMAD3:SMAD4 heterotrimer |
疾病名称 | 关系值 | NofPmids | NofSnps | 来源 |
Mammary Neoplasms | 0.127348794 | 10 | 0 | BeFree_CTD_human_LHGDN |
Inflammation | 0.1254487 | 3 | 0 | CTD_human_LHGDN |
melanoma | 0.125352893 | 12 | 2 | BeFree_GAD_GWASCAT |
Asthma | 0.123724241 | 6 | 1 | BeFree_CTD_human_GAD |
Multiple Myeloma | 0.122171535 | 8 | 0 | BeFree_CTD_human |
Prostatic Neoplasms | 0.120814326 | 4 | 0 | BeFree_CTD_human |
Atherosclerosis | 0.120271442 | 2 | 0 | BeFree_CTD_human |
Obesity | 0.120271442 | 2 | 0 | BeFree_CTD_human |
Dermatitis | 0.120271442 | 2 | 0 | BeFree_CTD_human |
Brain Ischemia | 0.120271442 | 2 | 0 | BeFree_CTD_human |
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