CRYBA1(βA1-晶状体蛋白)是β-晶状体蛋白基因家族的成员,该家族还包括CRYBA2、CRYBA4等基因,主要编码晶状体中的结构蛋白。β-晶状体蛋白家族成员通常具有高度保守的结构域,参与维持晶状体的透明性和折射功能,对眼睛的屈光能力至关重要。CRYBA1编码的蛋白质在晶状体纤维细胞中高表达,通过与其他晶状体蛋白(如α-和γ-晶状体蛋白)相互作用形成稳定的聚合物,确保晶状体的光学特性。CRYBA1的突变可能导致蛋白质错误折叠或聚集,进而引发白内障,这是最常见的与CRYBA1相关的疾病。例如,CRYBA1的错义突变(如G91D)会破坏蛋白质的稳定性,导致晶状体混浊。此外,CRYBA1的表达异常(如过表达或降低表达)可能干扰晶状体发育或透明度。过表达可能导致蛋白质异常聚集,而表达降低可能影响晶状体的结构完整性。CRYBA1还与某些遗传性白内障综合征相关,如先天性白内障。研究还发现,CRYBA1的表达变化可能影响其他晶状体蛋白的稳定性或功能,因为晶状体蛋白之间依赖相互作用维持整体结构。因此,CRYBA1在维持视觉功能中扮演关键角色,其突变或表达异常会直接损害晶状体功能,导致视力障碍。
Crystallins are separated into two classes: taxon-specific, or enzyme, and ubiquitous. The latter class constitutes the major proteins of vertebrate eye lens and maintains the transparency and refractive index of the lens. Since lens central fiber cells lose their nuclei during development, these crystallins are made and then retained throughout life, making them extremely stable proteins. Mammalian lens crystallins are divided into alpha, beta, and gamma families; beta and gamma crystallins are also considered as a superfamily. Alpha and beta families are further divided into acidic and basic groups. Seven protein regions exist in crystallins: four homologous motifs, a connecting peptide, and N- and C-terminal extensions. Beta-crystallins, the most heterogeneous, differ by the presence of the C-terminal extension (present in the basic group, none in the acidic group). Beta-crystallins form aggregates of different sizes and are able to self-associate to form dimers or to form heterodimers with other beta-crystallins. This gene, a beta acidic group member, encodes two proteins (crystallin, beta A3 and crystallin, beta A1) from a single mRNA, the latter protein is 17 aa shorter than crystallin, beta A3 and is generated by use of an alternate translation initiation site. Deletion of exons 3 and 4 causes the autosomal dominant disease 'zonular cataract with sutural opacities'. [provided by RefSeq, Jul 2008]
晶状体被分为两大类:分类单元专用,或酶,和无处不在。后者类构成脊椎动物眼透镜的主要的蛋白质,并保持透镜的透明性和折射率。由于镜头中心光纤细胞发育过程中失去它们的原子核,这些晶状体由再保留整个生命,使他们非常稳定的蛋白质。哺乳动物镜头晶状体分为α,β和γ家庭; β和γ晶状体也被认为是一个家族。 α和β家族进一步分成酸性和碱性基团。 4条相同的图案,连接肽和N-和C-末端延伸:七蛋白区域在晶状体存在。 β-内晶状体,最异类,由C末端延伸(存在于碱性基团,没有在酸性基团)的存在下不同。的β-晶状形成不同尺寸的聚集体,并且能够自我结合以形成二聚体或以与其它β-晶状体异二聚体。这个基因,β-酸性基团部件,从单一的mRNA编码的两种蛋白质(晶状体,β-A3和晶状,βA1)中,后者蛋白是17个氨基酸比晶状体,β-A3短,通过使用备用的翻译起始的产生现场。外显子3和4的原因常染色体显性遗传病‘悬韧带白内障混浊缝“的缺失。 [由RefSeq的,2008年7月提供]
CRYBA1基因(以及对应的蛋白质)的细胞分布位置:
CRYBA1基因的本体(GO)信息:
| 疾病名称 | 关系值 | NofPmids | NofSnps | 来源 |
| Cataract, Congenital Zonular, with Sutural Opacities | 0.32 | 0 | 0 | CLINVAR_CTD_human_MGD |
| CATARACT, MARNER TYPE | 0.12 | 0 | 0 | ORPHANET |
| Ocular Hypertension | 0.08 | 1 | 0 | RGD |
| Macular Degeneration, Age-Related, 1 | 0.08 | 0 | 0 | MGD |
| Embryonal nuclear cataract (disorder) | 0.002909916 | 2 | 0 | BeFree_GAD |
| Cataract | 0.002171535 | 8 | 0 | BeFree |
| Congenital cataract | 0.001085767 | 4 | 0 | BeFree |
| Bilateral cataracts (disorder) | 0.001085767 | 4 | 0 | BeFree |
| Neurofibromatosis 1 | 0.000271442 | 1 | 0 | BeFree |
| Acute Promyelocytic Leukemia | 0.000271442 | 1 | 0 | BeFree |
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