HDAC8(组蛋白去乙酰化酶8,Histone Deacetylase 8)属于组蛋白去乙酰化酶(HDACs)家族中的I类亚家族,该家族还包括HDAC1、HDAC2和HDAC3。HDACs的主要功能是通过移除组蛋白上的乙酰基团,使染色质结构更加紧密,从而抑制基因转录。HDAC8在细胞增殖、分化、代谢和应激反应等过程中发挥重要作用,尤其在胚胎发育和神经系统功能中表现突出。HDAC8的表达产物是一种依赖锌离子的酶,主要定位于细胞核和细胞质,其作用位点包括组蛋白和非组蛋白底物(如转录因子和信号蛋白)。HDAC8的突变可能导致其酶活性异常,进而影响基因表达调控。例如,HDAC8的功能丧失性突变与Cornelia de Lange综合征(CdLS)相关,这是一种以智力障碍、面部畸形和生长迟缓为特征的遗传病。此外,HDAC8在多种癌症(如神经母细胞瘤、乳腺癌和白血病)中过表达,促进肿瘤细胞的增殖和存活。HDAC8的过表达可能导致抑癌基因沉默和促癌基因激活,而降低其表达则可能恢复正常的基因调控并抑制肿瘤生长。HDAC家族成员的共性在于它们均参与表观遗传调控,通过去乙酰化作用影响染色质结构和基因表达。HDAC8的抑制剂已被开发为潜在的抗癌药物,用于靶向过度活跃的HDAC活性。
Histones play a critical role in transcriptional regulation, cell cycle progression, and developmental events. Histone acetylation/deacetylation alters chromosome structure and affects transcription factor access to DNA. The protein encoded by this gene belongs to class I of the histone deacetylase family. It catalyzes the deacetylation of lysine residues in the histone N-terminal tails and represses transcription in large multiprotein complexes with transcriptional co-repressors. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Oct 2009]
组蛋白中转录调节,细胞周期进程,并发育事件中起关键作用。组蛋白乙酰化/脱乙酰化改变染色体结构,影响到DNA的转录因子的访问。由该基因编码的蛋白质属于组蛋白脱乙酰家族的I类。它催化赖氨酸残基的脱乙酰化的组蛋白N-末端尾部,并与转录共阻遏大多蛋白复合压制转录。已发现该基因编码不同亚型的多个抄本变形。 [由RefSeq的,2009年10月提供]
HDAC8基因(以及对应的蛋白质)的细胞分布位置:
HDAC8基因的本体(GO)信息:
名称 |
---|
5203 Viral carcinogenesis [PATH:hsa05203] |
5034 Alcoholism [PATH:hsa05034] |
名称 |
---|
Cell Cycle |
Cell Cycle, Mitotic |
Chromatin modifying enzymes |
Chromatin organization |
Constitutive Signaling by NOTCH1 HD+PEST Domain Mutants |
Constitutive Signaling by NOTCH1 PEST Domain Mutants |
Disease |
Diseases of signal transduction |
HDACs deacetylate histones |
M Phase |
Mitotic Anaphase |
Mitotic Metaphase and Anaphase |
Mitotic Prometaphase |
NOTCH1 Intracellular Domain Regulates Transcription |
Resolution of Sister Chromatid Cohesion |
Separation of Sister Chromatids |
Signal Transduction |
Signaling by NOTCH |
Signaling by NOTCH1 |
Signaling by NOTCH1 HD+PEST Domain Mutants in Cancer |
Signaling by NOTCH1 in Cancer |
Signaling by NOTCH1 PEST Domain Mutants in Cancer |
疾病名称 | 关系值 | NofPmids | NofSnps | 来源 |
WILSON-TURNER X-LINKED MENTAL RETARDATION SYNDROME | 0.24 | 0 | 1 | CLINVAR_ORPHANET |
CORNELIA DE LANGE SYNDROME 5 | 0.24 | 1 | 11 | CLINVAR_UNIPROT |
Cornelia De Lange Syndrome | 0.122714419 | 10 | 0 | BeFree_ORPHANET |
Carcinogenesis | 0.000814326 | 3 | 0 | BeFree |
Neuroblastoma | 0.000814326 | 3 | 0 | BeFree |
Central neuroblastoma | 0.000814326 | 3 | 0 | BeFree |
Rett Syndrome | 0.000542884 | 2 | 0 | BeFree |
Intellectual Disability | 0.000542884 | 2 | 0 | BeFree |
Liver and Intrahepatic Biliary Tract Carcinoma | 0.000271442 | 1 | 0 | BeFree |
Stage 4S neuroblastoma | 0.000271442 | 1 | 0 | BeFree |
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