Scallop DMT functions as a Ca2+ transporter

Scallop DMT functions as a Ca2+ transporter
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扇贝 DMT 作为 Ca2 转运蛋白

DOI:
10.1016/j.febslet.2005.03.082
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发表时间:
2005
期刊:
影响因子:
3.5
通讯作者:
S. Kaneko
S. Kaneko
中科院分区:
生物学3区
文献类型:
--
作者:
H. Toyohara;S. Yamamoto;Masatomi Hosoi;Masaya Takagi;I. Hayashi;Kenji Nakao;S. Kaneko

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我们确定了一个DMT(二价金属转运蛋白)同源蛋白的功能作为钙离子转运。扇贝DMT cDNA编码一个539个氨基酸的蛋白质,具有12个假定的跨膜结构域,并且在第四胞外环中具有一致的转运基序。由于其mRNA在鳃和肠中显著表达,推测扇贝DMT通过鳃从海水中转运Ca 2+,通过肠从食物中转运Ca 2+。扇贝DMT缺乏铁调节蛋白中常见的铁响应元件,这表明它不受细胞内Fe 2+浓度的转录后调节。扇贝DMT与其他DMT不同,它具有明显的Ca ~(2+)转运功能,但也具有与其他DMT相似的Fe ~(2+)和Cd ~(2+)转运功能。
We identified a DMT (divalent metal transporter) homologous protein that functions as a Ca2+transporter. Scallop DMT cDNA encodes a 539-amino-acid protein with 12 putative membrane-spanning domains and has a consensus transport motif in the fourth extracellular loop. Since its mRNA is significantly expressed in the gill and intestine, it is assumed that scallop DMT transports Ca2+from seawater by the gill and from food by the intestine. Scallop DMT lacks the iron-responsive element commonly found in iron-regulatory proteins, suggesting that it is free of the post-transcriptional regulation from intracellular Fe2+concentration. Scallop DMT distinctly functions as a Ca2+transporter unlike other DMTs, however, it also transports Fe2+and Cd2+similar to them.
DOI: 10.1016/0888-7543(95)80053-o
发表时间: 1995-01-20
期刊: GENOMICS
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