Out-of-frame start codons prevent translation of truncated nucleo-cytosolic cathepsin L in vivo

Out-of-frame start codons prevent translation of truncated nucleo-cytosolic cathepsin L in vivo
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框外起始密码子阻止截短的核胞浆组织蛋白酶 L 在体内的翻译

DOI:
10.1038/ncomms5931
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发表时间:
2014
影响因子:
16.6
通讯作者:
Reinheckel T
Reinheckel T
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Tholen M;Hillebrand LE;Tholen S;Sedelmeier O;Arnold SJ;Reinheckel T

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据报道,溶酶体蛋白酶组织蛋白酶L切割各种功能上重要的胞质或核蛋白。为了解释组织蛋白酶L的核-胞质定位,已经假设在翻译起始期间跳过第一起始密码子导致N-末端截短的蛋白质缺乏内质网输入信号。在这里,我们证明了框外AUG阻止在细胞培养物中以及在新的敲入小鼠模型中截短的组织蛋白酶L的翻译。我们进一步评估核组织蛋白酶L在早期胚胎发育过程中的潜在作用。我们的分析揭示了正常的组织蛋白酶L缺陷胚胎的上胚层发育,但揭示了一个显着的溶酶体存储表型的内脏内胚层的胚外组织。总之,组织蛋白酶L缺乏的表型可以完全归因于缺乏典型的靶向组织蛋白酶L,而核-胞质组织蛋白酶L的生物起源和功能仍然难以捉摸。
The lysosomal protease cathepsin L has been reported to cleave various functionally important cytosolic or nuclear proteins. To explain nucleo-cytosolic localization of cathepsin L, it has been hypothesized that skipping of the first start codon during translation initiation results in an N-terminally truncated protein lacking the endoplasmic reticulum-import signal. Here we demonstrate that out-of-frame AUGs prevent translation of truncated cathepsin L in cell culture as well as in a new knock-in mouse model. We further evaluate potential roles of nuclear cathepsin L during early embryonic development. Our analysis reveals normal epiblast development of cathepsin L-deficient embryos, but uncovers a pronounced lysosomal storage phenotype in the extra-embryonic tissue of the visceral endoderm. In conclusion, the phenotypes of cathepsin L deficiency can be fully assigned to lack of canonically targeted cathepsin L, while the biogenesis and functionality of nucleo-cytosolic cathepsin L remain elusive.
DOI: 10.1172/jci58552
发表时间: 2011-10-01
影响因子: 15.9
作者:
Yaddanapudi, Suma;Altintas, Mehmet M.;Reiser, Jochen
通讯作者: Reiser, Jochen
进化上保守的三联色氨酸基序可稳定组织蛋白酶 L 样半胱氨酸蛋白酶的前结构域。
DOI: --
发表时间: 2000
期刊: European Journal of Biochemistry
影响因子: --
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DOI: 10.1172/jci32022
发表时间: 2007-08-01
影响因子: 15.9
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DOI: --
发表时间: 2002-04
影响因子: 4
作者:
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通讯作者: S. Aho;Laura Levänsuo;O. Montonen;C. Kari;U. Rodeck;J. Uitto
DOI: 10.1016/s0925-4773(02)00237-x
发表时间: 2002-10-01
影响因子: 2.6
作者:
Hayashi, K;Kobayashi, T;Kitamura, D
通讯作者: Kitamura, D