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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2005.6
- 수록면
- 60 - 65 (6page)
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초록· 키워드
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The human solute carrier, SLC41A1, is a Mg²+ transporter that is regulated by extracellular magnesium. Although intracellular magnesium plays a fundamental role in cellular metabolism, little is known about how Mg²+ is taken up and controlled by cells. Magnesium plays a fundamental role in cellular metabolism so that its control within the body is critical. Magnesium homeostasis is principally a balance between intestinal absorption of dietary magnesium and renal excretion of urinary magnesium. The kidney, mainly the distal convoluted tubule, controls magnesium reabsorption. Although renal reabsorption is under the influence of many hormones, selective regulation of magnesium transport is due to intrinsic control involving transcriptional processes and synthesis of transport proteins. Using microarray analysis, identification of the genetic elements involved with this transcriptional control has been begun. SLC41A1 (GenBank Accession No. AJ514402), comprises 10 putative transmembrane domains, two of which are highly homologous to the integral membrane part of the prokaryote transports Mg²+ and other divalent cations Sr²+, Zn²+, Cu²+, Fe²+, Co²+, Ba²+, and Cd²+ but not Ca2+, Mn²+, and Ni2+. Transport of Mg²+ by SLC41A1 is rheogenic, voltage dependent, and not coupled to Na or Cl . Expressed SLC41A1 transports a range of other divalent cations: Mg²+, Sr²+, Zn²+, Cu²+, Fe²+, Co²+, Ba²+, and Cd²+. The divalent cations Ca²+, Mn²+, and Ni²+ and the trivalent ion Gd³+ did not induce currents nor did they inhibit Mg²+ transport. The nonselective cation La3+ abolishes Mg²+ uptake. Computer analysis of the SLC41A1 protein structure reveals that it belongs to MgtE protein family & suggested that the human solute carrier, SLC41A1, might be a eukaryotic Mg²+ transporter closely related (60-70%) protein encoded by SLC41A2 is a Mg²+ transporter that might be involved in magnesium homeostasis in epithelial cells also transports a range of other divalent cations: Ba², Ni², Co², Fe², or Mn², but not Ca², Zn², or Cu²+ that may have related functional properties.
목차
ABSTRACT
History
Introduction
Genomic sequence
Factors affecting magnesium absorption/transport
Conclusion
Acknowledgment
References
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