MAF(Musculoaponeurotic Fibrosarcoma)基因属于MAF转录因子家族,编码一种碱性亮氨酸拉链(bZIP)转录因子,在调控细胞分化、增殖和凋亡中起关键作用。MAF家族包括c-MAF、MAFA、MAFB和MAFG等成员,它们通过结合DNA上的MARE元件(MAF识别元件)调控靶基因表达,参与发育、免疫和代谢等过程。MAF蛋白通常与其它bZIP蛋白(如JUN或FOS)形成二聚体,增强或抑制靶基因转录。MAF在眼睛晶状体发育中尤为重要,c-MAF突变可导致先天性白内障。此外,MAF在浆细胞分化和抗体产生中不可或缺,其异常表达与多发性骨髓瘤相关,尤其是t(14;16)染色体易位导致MAF过表达,促进癌细胞增殖和存活。MAF还参与调节Th17细胞分化,影响自身免疫疾病如类风湿性关节炎。MAF突变可能导致功能丧失或获得,功能丧失突变可能引起发育缺陷,而功能获得突变(如多发性骨髓瘤中的MAF过表达)会激活促生存和增殖通路。降低MAF表达可能损害免疫细胞功能或晶状体发育,而过表达则可能驱动肿瘤发生或自身免疫反应。MAF家族成员的共性是含有保守的bZIP结构域,能形成二聚体并结合特定DNA序列,但不同成员在组织分布和功能上有所差异,共同调控发育和稳态的关键基因网络。
The protein encoded by this gene is a DNA-binding, leucine zipper-containing transcription factor that acts as a homodimer or as a heterodimer. Depending on the binding site and binding partner, the encoded protein can be a transcriptional activator or repressor. This protein plays a role in the regulation of several cellular processes, including embryonic lens fiber cell development, increased T-cell susceptibility to apoptosis, and chondrocyte terminal differentiation. Defects in this gene are a cause of juvenile-onset pulverulent cataract as well as congenital cerulean cataract 4 (CCA4). Two transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jan 2010]
由该基因编码的蛋白质是DNA结合,亮氨酸含拉链转录充当同二聚体或异二聚体的因素。取决于结合位点和结合伴侣,编码的蛋白质可以是转录激活或阻遏。这种蛋白在几个细胞过程,包括胚胎透镜纤维细胞发育的调节作用,提高T细胞易感性凋亡,软骨细胞的终末分化。这种基因缺陷是青少年发病粉状白内障的原因,以及先天性白内障蔚蓝4(CCA4)。已发现该基因编码不同亚型的两个转录变异体。 [由RefSeq的,2010年1月提供]
MAF基因(以及对应的蛋白质)的细胞分布位置:
MAF基因的本体(GO)信息:
名称 |
---|
5202 Transcriptional misregulation in cancers [PATH:hsa05202] |
5321 Inflammatiory bowel disease (IBD) [PATH:hsa05321] |
疾病名称 | 关系值 | NofPmids | NofSnps | 来源 |
Cataract, Pulverulent, Juvenile-Onset | 0.24 | 0 | 4 | CLINVAR_CTD_human |
Cataracts, Congenital, with Sensorineural Deafness, Down Syndrome-Like Facial Appearance, Short Stature, and Mental Retardation | 0.24 | 1 | 6 | CLINVAR_UNIPROT |
CATARACT 21, MULTIPLE TYPES | 0.2 | 3 | 0 | MGD_UNIPROT |
Cataract, congenital, cerulean type 1 | 0.120542884 | 2 | 2 | BeFree_ORPHANET |
Intrahepatic Cholestasis | 0.12 | 1 | 0 | CTD_human |
Cataract microcornea syndrome | 0.12 | 0 | 0 | ORPHANET |
Multiple Myeloma | 0.086524536 | 14 | 0 | BeFree_LHGDN_MGD |
Obesity | 0.007915422 | 5 | 1 | BeFree_GAD |
T-Cell Lymphoma | 0.0054487 | 2 | 0 | LHGDN |
Cataract | 0.00408156 | 6 | 0 | BeFree_LHGDN |
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