TNXB(Tenascin-XB)是细胞外基质蛋白tenascin家族的一员,该家族以参与组织发育和修复而闻名。TNXB编码的蛋白Tenascin-X(TNX)主要在结缔组织中表达,如皮肤、肌腱和血管,其核心功能是维持细胞外基质的结构稳定性,并调节胶原纤维的组装。它通过与胶原蛋白和弹性蛋白相互作用,增强组织的机械强度和弹性。TNXB突变会导致常染色体隐性遗传病——Ehlers-Danlos综合征(EDS)的经典型-like型,表现为皮肤过度伸展、关节活动过度及组织脆弱,这是因为TNX缺失破坏了胶原交联,削弱结缔组织完整性。若TNXB过表达,可能加剧纤维化疾病(如肺纤维化)的病理过程,因其促进胶原沉积;而表达降低则可能诱发类似EDS的症状或心血管异常。tenascin家族(包括TNR、TNC等)的共性在于均含EGF样重复序列和纤维蛋白原结构域,介导细胞粘附与信号传导。TNXB的异常表达还可能影响TGF-β(转化生长因子-β)通路,该通路调控纤维化与伤口愈合,因此TNX水平失衡可能间接干扰这些生理过程。研究还发现TNX具有免疫调节作用,可能通过调控炎症因子影响自身免疫疾病(如系统性红斑狼疮)的发展。
This gene encodes a member of the tenascin family of extracellular matrix glycoproteins. The tenascins have anti-adhesive effects, as opposed to fibronectin which is adhesive. This protein is thought to function in matrix maturation during wound healing, and its deficiency has been associated with the connective tissue disorder Ehlers-Danlos syndrome. This gene localizes to the major histocompatibility complex (MHC) class III region on chromosome 6. It is one of four genes in this cluster which have been duplicated. The duplicated copy of this gene is incomplete and is a pseudogene which is transcribed but does not encode a protein. The structure of this gene is unusual in that it overlaps the CREBL1 and CYP21A2 genes at its 5' and 3' ends, respectively. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jul 2008]
该基因编码的腱生蛋白家族的细胞外基质糖蛋白中的一员。所述tenascins具有抗粘附作用,而不是纤连蛋白是粘合剂。这种蛋白质被认为是伤口愈合过程中基质成熟起作用,它的不足已与结缔组织障碍埃 - 当洛综合征。该基因定位于第6号染色体上的主要组织相容性复合体(MHC)III类区域这是四个基因在这一组已被复制的。该基因的复制副本是不完整的并且是被转录但不编码的蛋白质的假基因。该基因的结构是不寻常的,因为它分别重叠CREBL1和CYP21A2基因在其5‘和3‘末端。已发现该基因编码不同亚型的多个抄本变形。 [由RefSeq的,2008年7月提供]
TNXB基因(以及对应的蛋白质)的细胞分布位置:
TNXB基因的本体(GO)信息:
| 名称 |
|---|
| 4151 PI3K-Akt signaling pathway [PATH:hsa04151] |
| 4512 ECM-receptor interaction [PATH:hsa04512] |
| 4510 Focal adhesion [PATH:hsa04510] |
| 5206 MicroRNAs in cancer [PATH:hsa05206] |
| 名称 |
|---|
| ECM proteoglycans |
| Extracellular matrix organization |
| 疾病名称 | 关系值 | NofPmids | NofSnps | 来源 |
| Ehlers-Danlos syndrome caused by tenascin-X deficiency | 0.560271442 | 3 | 4 | BeFree_CLINVAR_CTD_human_MGD_ORPHANET_UNIPROT |
| Ehlers-Danlos syndrome, type 3 (disorder) | 0.360542884 | 2 | 2 | BeFree_CLINVAR_CTD_human_ORPHANET |
| Lupus Erythematosus, Systemic | 0.128001298 | 4 | 1 | BeFree_GAD_GWASCAT_LHGDN |
| Age related macular degeneration | 0.120271442 | 1 | 1 | BeFree_GWASCAT |
| Hypertensive disease | 0.12 | 1 | 1 | GWASCAT |
| VESICOURETERAL REFLUX 8 | 0.12 | 1 | 0 | UNIPROT |
| Dermatitis, Atopic | 0.12 | 2 | 2 | GWASCAT |
| Ehlers-Danlos Syndrome | 0.011605987 | 24 | 0 | BeFree_GAD_LHGDN |
| Schizophrenia | 0.00827274 | 3 | 0 | BeFree_GAD_LHGDN |
| Diabetes Mellitus, Insulin-Dependent | 0.004734064 | 2 | 0 | GAD |
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