SOX2(SRY-box transcription factor 2)是一种重要的转录因子,属于SOX基因家族(SRY-related HMG-box family),该家族成员均含有一个保守的高迁移率族(HMG)结构域,能够结合DNA并调控基因表达。SOX2在胚胎发育中起核心作用,尤其在维持多能干细胞(如胚胎干细胞)的自我更新和分化潜能中不可或缺。它通过与OCT4、NANOG等其他转录因子协同作用,激活或抑制下游靶基因,参与神经发育、视网膜形成及多种器官的发生。SOX2的主要作用位点包括早期胚胎的外胚层、神经管、眼睛和脑部,其表达异常会导致严重发育缺陷。例如,SOX2突变可引发无眼/小眼症、垂体功能障碍或智力障碍等综合征。在癌症中,SOX2的过表达常见于肺鳞癌、胶质瘤等肿瘤,促进细胞增殖和转移,而表达降低则可能导致干细胞特性丧失。SOX2基因家族(含SOX1-SOX21等)的共性是通过HMG结构域识别特定DNA序列(如AACAAT),调控发育和细胞命运决定。过表达SOX2可能抑制分化、维持干细胞态,但也会诱发肿瘤;表达不足则导致发育停滞或组织退化。此外,SOX2与Wnt、FGF等信号通路交互,影响其他基因(如Nestin、FGF4)的表达,其动态平衡对机体至关重要。
This intronless gene encodes a member of the SRY-related HMG-box (SOX) family of transcription factors involved in the regulation of embryonic development and in the determination of cell fate. The product of this gene is required for stem-cell maintenance in the central nervous system, and also regulates gene expression in the stomach. Mutations in this gene have been associated with optic nerve hypoplasia and with syndromic microphthalmia, a severe form of structural eye malformation. This gene lies within an intron of another gene called SOX2 overlapping transcript (SOX2OT). [provided by RefSeq, Jul 2008]
Subcellular localization of SOX2 (and its protein):
Gene Ontology (GO) terms for SOX2:
| Interacting Gene | Interaction | Source/Score |
| Name |
|---|
| 4390 Hippo signaling pathway [PATH:hsa04390] |
| 4550 Signaling pathways regulating pluripotency of stem cells [PATH:hsa04550] |
| Name |
|---|
| deactivation of the beta-catenin transactivating complex |
| Developmental Biology |
| POU5F1 (OCT4), SOX2, NANOG activate genes related to proliferation |
| POU5F1 (OCT4), SOX2, NANOG repress genes related to differentiation |
| Signaling by Wnt |
| TCF dependent signaling in response to WNT |
| Transcriptional regulation of pluripotent stem cells |
| Disease | Score | NofPmids | NofSnps | Source |
| Microphthalmia, Syndromic 3 | 0.360814326 | 3 | 0 | BeFree_CLINVAR_CTD_human_ORPHANET |
| Anophthalmos | 0.13806451 | 23 | 0 | BeFree_CTD_human_GAD_LHGDN |
| Squamous cell carcinoma | 0.125428837 | 20 | 0 | BeFree_CTD_human |
| Septo-Optic Dysplasia | 0.123538676 | 3 | 0 | BeFree_LHGDN_ORPHANET |
| Squamous cell carcinoma of esophagus | 0.121900093 | 7 | 0 | BeFree_CTD_human |
| Lung Neoplasms | 0.121357209 | 6 | 0 | BeFree_CTD_human |
| Small cell carcinoma of lung | 0.121085767 | 4 | 0 | BeFree_CTD_human |
| Thoracic Neoplasms | 0.12 | 1 | 0 | CTD_human |
| Sarcoma | 0.12 | 1 | 0 | CTD_human |
| Diabetes Mellitus, Experimental | 0.08 | 1 | 0 | RGD |
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