The cell type‐specific ER membrane protein UGS148 is not essential in mice

The cell type‐specific ER membrane protein UGS148 is not essential in mice
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细胞类型特异性 ER 膜蛋白 UGS148 在小鼠中并不是必需的

DOI:
10.1111/gtc.12910
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发表时间:
2021
期刊:
影响因子:
2.1
通讯作者:
Maita Hiroshi
Maita Hiroshi
中科院分区:
生物学4区
文献类型:
--
作者:
Takahashi Osamu;Tanahashi Mayuko;Yokoi Saori;Kaneko Mari;Yanaka Kaori;Nakagawa Shinichi;Maita Hiroshi

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高等真核生物的基因组编码许多未鉴定的蛋白质,由于缺乏保守的功能结构域,这些蛋白质的功能无法从初级序列中预测出来。在这项研究中,我们专注于一种特性不佳的蛋白UGS148,它在一种特殊的细胞类型中高度表达,称为张力细胞,排列在下丘脑第三脑室腹壁。UGS148免疫组织化学染色显示伸展细胞形态细腻,顶端内质网高度分枝。免疫沉淀显示UGS148在体外至少与线粒体ATPase结合,在柔韧细胞中ER和线粒体信号偶尔重叠。缺乏UGS148的突变小鼠没有表现出明显的表型,这表明UGS148在正常实验室条件下饲养的小鼠中不是必需的。我们还发现,被预测唯一检测到UGS148基因mRNA的RNA探针与未表征的RNA发生交叉反应,这突显了在基于杂交的RNA定位研究中对探针特异性进行实验验证的重要性。
Genomes of higher eukaryotes encode many uncharacterized proteins, and the functions of these proteins cannot be predicted from the primary sequences due to a lack of conserved functional domains. In this study, we focused on a poorly characterized protein UGS148 that is highly expressed in a specialized cell type called tanycytes that line the ventral wall of the third ventricle in the hypothalamus. Immunostaining of UGS148 revealed the fine morphology of tanycytes with highly branched apical ER membranes. Immunoprecipitation revealed that UGS148 associated with mitochondrial ATPase at leastin vitro, and ER and mitochondrial signals occasionally overlapped in tanycytes. Mutant mice lacking UGS148 did not exhibit overt phenotypes, suggesting that UGS148 was not essential in mice reared under normal laboratory conditions. We also found that RNA probes that were predicted to uniquely detect UGS148 mRNA cross‐reacted with uncharacterized RNAs, highlighting the importance of experimental validation of the specificity of probes during the hybridization‐based study of RNA localization.
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