GAS5(Growth Arrest-Specific 5)是一种长链非编码RNA(lncRNA,long non-coding RNA,指长度超过200个核苷酸但不编码蛋白质的RNA分子),属于生长停滞特异性(Growth Arrest-Specific,GAS)基因家族成员。该家族共性是在细胞生长停滞状态下高表达,参与调控细胞周期、增殖和凋亡等过程。GAS5通过模拟微小RNA(miRNA)结合位点作为“分子海绵”吸附miRNA(如miR-21),从而解除miRNA对其靶基因的抑制,间接调控下游信号通路。其表达产物在细胞核和细胞质中均有分布,主要作用位点包括细胞周期调控蛋白(如CDK6)和凋亡相关蛋白(如Bcl-2)。GAS5通过抑制糖皮质激素受体(GR)的转录活性影响炎症反应,并通过p53依赖或非依赖途径诱导凋亡。突变或表达异常会导致功能紊乱,例如GAS5低表达常见于多种癌症(如乳腺癌、肺癌),与肿瘤细胞增殖、迁移和化疗耐药相关;而过表达可能促进细胞凋亡或抑制增殖。GAS5还与自身免疫疾病(如系统性红斑狼疮)相关,其低表达可能导致免疫过度激活。若该基因过表达,可能通过抑制miR-21增强PTEN(抑癌基因)活性,阻断PI3K/AKT促存活通路;而表达降低时,miR-21过度活跃会促进肿瘤进展。GAS5家族成员普遍具有细胞应激响应特性,并在代谢、分化等过程中发挥调控作用。
This gene produces a spliced long non-coding RNA and is a member of the 5' terminal oligo-pyrimidine class of genes. It is a small nucleolar RNA host gene, containing multiple C/D box snoRNA genes in its introns. Part of the secondary RNA structure of the encoded transcript mimics glucocorticoid response element (GRE) which means it can bind to the DNA binding domain of the glucocorticoid receptor (nuclear receptor subfamily 3, group C, member 1). This action blocks the glucocorticoid receptor from being activated and thereby stops it from regulating the transcription of its target genes. This transcript is also thought to regulate the transcriptional activity of other receptors, such as androgen, progesterone and mineralocorticoid receptors, that can bind to its GRE mimic region. Multiple functions have been associated with this transcript, including cellular growth arrest and apoptosis. It has also been identified as a potential tumor suppressor, with its down-regulation associated with cancer in multiple different tissues. [provided by RefSeq, Mar 2015]
该基因产生一个拼接长的非编码RNA,是5‘末端的寡嘧啶类的基因的一个成员。这是一个小核仁RNA宿主基因,包含多个C / D盒的snoRNA基因内含子的。所编码的转录物模拟物的糖皮质激素应答元件(GRE)的二级RNA结构,这意味着它可以结合到糖皮质激素受体(核受体亚家族3,C组,成员1)的DNA结合域的一部分。这个动作块被激活的糖皮??质激素受体,从而停止它从调节其靶基因的转录。此转录物也被认为调节其他受体如雄激素,孕激素和盐皮质激素受体,可以结合其GRE模拟区的转录活性。多种功能已与这份成绩单,包括细胞生长停滞和凋亡有关。它也被标识为潜在的肿瘤抑制,与癌症中的多个不同的组织相关联的其下调。 [由RefSeq的,2015年3月提供]
GAS5基因(以及对应的蛋白质)的细胞分布位置:
GAS5基因的本体(GO)信息:
疾病名称 | 关系值 | NofPmids | NofSnps | 来源 |
Myocardial Ischemia | 0.12 | 1 | 0 | CTD_human |
B-Cell Lymphomas | 0.002995792 | 1 | 0 | BeFree_LHGDN |
Carcinogenesis | 0.000814326 | 3 | 0 | BeFree |
Breast Carcinoma | 0.000814326 | 3 | 0 | BeFree |
Malignant neoplasm of breast | 0.000814326 | 3 | 0 | BeFree |
Colorectal Cancer | 0.000271442 | 1 | 0 | BeFree |
Lymphoma | 0.000271442 | 1 | 0 | BeFree |
Malignant Pleural Mesothelioma | 0.000271442 | 1 | 0 | BeFree |
Stomach Carcinoma | 0.000271442 | 1 | 0 | BeFree |
Liver neoplasms | 0.000271442 | 1 | 0 | BeFree |
山东省济南市章丘区文博路2号 齐鲁师范学院 genelibs生信实验室
山东省济南市高新区舜华路750号大学科技园北区F座4单元2楼
电话: 0531-88819269
E-mail: product@genelibs.com
关注微信订阅号,实时查看信息,关注医学生物学动态。