unc-45 gene of Caenorhabditis elegans encodes a muscle-specific tetratricopeptide repeat-containing protein.

unc-45 gene of Caenorhabditis elegans encodes a muscle-specific tetratricopeptide repeat-containing protein.
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秀丽隐杆线虫的 unc-45 基因编码肌肉特异性四肽重复的蛋白质。

DOI:
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发表时间:
1999
影响因子:
--
通讯作者:
D. Pilgrim
D. Pilgrim
中科院分区:
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文献类型:
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作者:
L. Venolia;W. Ao;Stuart K. Kim;C. Kim;D. Pilgrim

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线虫的unc-45基因对肌肉组织和胚胎发育至关重要。遗传学证据表明unc-45基因产物控制肌肉粗丝装配。我们在这里报告的基因的染色体定位和分离和测序的cDNA的决心。预测的unc-45蛋白的氨基末端含有三个串联重复序列,属于三肽重复序列家族。已显示三肽基序参与蛋白质相互作用,并且一些最接近的同源物具有分子伴侣样活性。该蛋白质的羧基末端与相关的真菌蛋白质CRO 1和She 4p具有同源性,这些蛋白质被假定在细胞质肌球蛋白的组装或与细胞质肌球蛋白的相互作用中发挥作用。我们还测定了C. Briggsae,这表明了高水平的保护。我们发现unc-45基因启动子可以驱动报告基因的表达,这仅限于肌肉组织(咽,体壁,外阴和肛门肌肉),与肌肉发育或功能的unc-45基因的作用一致。
The unc-45 gene of the nematode, Caenorhabditis elegans, is essential for muscle organization and embryonic development. Genetic evidence suggests the unc-45 gene product controls muscle thick filament assembly. We report here on the determination of the gene's chromosomal location and the isolation and sequencing of its cDNA. The amino terminus of the predicted unc-45 protein contains three tandem repeats that belong in the tetratricopeptide repeat family. Tetratricopeptide motifs have been shown to be involved in protein interactions, and some of the closest homologues have chaperone-like activity. The carboxy terminus of the protein has homology with the related fungal proteins, CRO1 and She4p, which have been postulated to play a role in assembly of or interactions with a cytoplasmic myosin. We have also determined the sequence of the homologous gene from C. briggsae, which demonstrates a high level of conservation. We show that the unc-45 gene promoter can drive reporter gene expression, which is limited to muscle tissues (pharyngeal, body wall, vulval, and anal muscles), consistent with a role for the unc-45 gene in muscle development or function.
DOI: --
发表时间: 1993
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影响因子: --
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