In vitro expression analysis shows that the secretory form of gelsolin is the sole source of amyloid in gelsolin-related amyloidosis.

In vitro expression analysis shows that the secretory form of gelsolin is the sole source of amyloid in gelsolin-related amyloidosis.
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体外表达分析表明,凝溶胶蛋白的分泌形式是凝溶胶蛋白相关淀粉样变性中淀粉样蛋白的唯一来源。

DOI:
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发表时间:
1996
影响因子:
3.5
通讯作者:
L. Peltonen
L. Peltonen
中科院分区:
生物学2区
文献类型:
--
作者:
H. Kangas;T. Paunio;N. Kalkkinen;A. Jalanko;L. Peltonen

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淀粉样变性是一组异常纤维蛋白沉积物在患者组织中积聚的疾病。在芬兰型家族性淀粉样变性 (FAF) 或凝溶胶蛋白相关淀粉样变性中,淀粉样蛋白亚基蛋白由氨基酸 173-243 的凝溶胶蛋白肽组成,并在 Asp187 处引起取代。凝溶胶蛋白是一种肌动蛋白调节蛋白,以分泌型和细胞内型两种形式存在,均由 9 号染色体上的单个基因编码。我们之前已经证明,携带 Asp187Asn 或 Asp187Tyr 突变的 FAF 相关形式的分泌型凝溶胶蛋白在细胞中加工异常,导致异常的 68 kDa 羧基末端片段的分泌。在这里,我们通过N端测序证明该异常片段的氨基端是氨基酸173,因此代表FAF淀粉样蛋白的N端。我们还提供证据表明,在患者脑脊液中检测到的异常凝溶胶蛋白片段中可以发现相同的截短凝溶胶蛋白。最后,我们还在COS-1细胞中表达了FAF相关形式的胞内凝溶胶蛋白,并发现其与分泌形式相反的加工没有异常。我们的结果提供了强有力的证据,证明分泌性凝溶胶蛋白是 FAF 中淀粉样蛋白形成的唯一原因。
Amyloidoses are a group of diseases where abnormal fibrillar protein deposits accumulate in patients' tissues. In familial amyloidosis of the Finnish type (FAF), or gelsolin-related amyloidosis, the amyloid subunit protein consists of gelsolin peptides of amino acids 173-243 with the disease causing substitution at Asp187. Gelsolin is an actin-modulating protein and exists in both secretory and intracellular forms both encoded by a single gene in chromosome 9. We have previously shown that the FAF-associated forms of secretory gelsolin carrying the Asp187Asn or Asp187Tyr mutations are abnormally processed in cells, resulting in the secretion of an aberrant 68 kDa carboxyterminal fragment. Here we demonstrate by N-terminal sequencing that the amino terminus of this abnormal fragment is the amino acid 173 and thus represents the N-terminus of the FAF amyloid. We also provide evidence that the same truncated gelsolin can be found among the aberrant gelsolin fragments detected in patients' CSF. Finally, we also expressed the FAF-associated forms of intracellular gelsolin in COS-1 cells, and found no abnormality in their processing opposite to secretory form. Our results provide strong evidence that the secretory gelsolin is solely responsible for the amyloid formation in FAF.
DOI: 10.1016/s0021-9258(18)61070-1
发表时间: 1987-07
期刊: The Journal of biological chemistry
影响因子: --
作者:
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DOI: 10.1128/mcb.3.2.280-289.1983
发表时间: 1983
影响因子: 5.3
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DOI: --
发表时间: 1984
期刊: The Journal of biological chemistry
影响因子: --
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凝溶胶蛋白定位于 9 号染色体上 ABL 附近。
DOI: --
发表时间: 1988
影响因子: 9.8
作者:
Kwiatkowski,DJ;Westbrook,CA;Bruns,GA;Morton,CC
通讯作者: Morton,CC
DOI: --
发表时间: 1995
期刊: The American journal of pathology.
影响因子: --
作者:
O'Brien,TD;Butler,PC;Kreutter,DK;Kane,LA;Eberhardt,NL
通讯作者: Eberhardt,NL