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The CLC-5 2Cl(−)/H(+) exchange transporter in endosomal function and Dent's disease
CLC-5 plays a critical role in the process of endocytosis in the proximal tubule of the kidney and mutations that alter protein function are the cause of Dent's I disease. In this X-linked disorder impaired reabsorption results in the wasting of calcium and low molecular weight protein to the u...
Autores principales: | , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Frontiers Media S.A.
2012
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3510460/ https://www.ncbi.nlm.nih.gov/pubmed/23226131 http://dx.doi.org/10.3389/fphys.2012.00449 |
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author | Lippiat, Jonathan D. Smith, Andrew J. |
author_facet | Lippiat, Jonathan D. Smith, Andrew J. |
author_sort | Lippiat, Jonathan D. |
collection | PubMed |
description | CLC-5 plays a critical role in the process of endocytosis in the proximal tubule of the kidney and mutations that alter protein function are the cause of Dent's I disease. In this X-linked disorder impaired reabsorption results in the wasting of calcium and low molecular weight protein to the urine, kidney stones, and progressive renal failure. Several different ion-transporting and protein clustering roles have been proposed as the physiological function of CLC-5 in endosomal membranes. At the time of its discovery, nearly 20 years ago, it was understandably assumed to be a chloride channel similar to known members of the CLC family, such as CLC-1, suggesting that chloride transport by CLC-5 was critical for endosomal function. Since then CLC-5 was found instead to be a 2Cl(−)/H(+) exchange transporter with voltage-dependent activity. Recent studies have determined that it is this coupled exchange of protons for chloride, and not just chloride transport, which is critical for endosomal and kidney function. This review discusses the recent ideas that describe how CLC-5 might function in endosomal membranes, the aspects that we still do not understand, and where controversies remain. |
format | Online Article Text |
id | pubmed-3510460 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2012 |
publisher | Frontiers Media S.A. |
record_format | MEDLINE/PubMed |
spelling | pubmed-35104602012-12-05 The CLC-5 2Cl(−)/H(+) exchange transporter in endosomal function and Dent's disease Lippiat, Jonathan D. Smith, Andrew J. Front Physiol Physiology CLC-5 plays a critical role in the process of endocytosis in the proximal tubule of the kidney and mutations that alter protein function are the cause of Dent's I disease. In this X-linked disorder impaired reabsorption results in the wasting of calcium and low molecular weight protein to the urine, kidney stones, and progressive renal failure. Several different ion-transporting and protein clustering roles have been proposed as the physiological function of CLC-5 in endosomal membranes. At the time of its discovery, nearly 20 years ago, it was understandably assumed to be a chloride channel similar to known members of the CLC family, such as CLC-1, suggesting that chloride transport by CLC-5 was critical for endosomal function. Since then CLC-5 was found instead to be a 2Cl(−)/H(+) exchange transporter with voltage-dependent activity. Recent studies have determined that it is this coupled exchange of protons for chloride, and not just chloride transport, which is critical for endosomal and kidney function. This review discusses the recent ideas that describe how CLC-5 might function in endosomal membranes, the aspects that we still do not understand, and where controversies remain. Frontiers Media S.A. 2012-11-30 /pmc/articles/PMC3510460/ /pubmed/23226131 http://dx.doi.org/10.3389/fphys.2012.00449 Text en Copyright © 2012 Lippiat and Smith. http://www.frontiersin.org/licenseagreement This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in other forums, provided the original authors and source are credited and subject to any copyright notices concerning any third-party graphics etc. |
spellingShingle | Physiology Lippiat, Jonathan D. Smith, Andrew J. The CLC-5 2Cl(−)/H(+) exchange transporter in endosomal function and Dent's disease |
title | The CLC-5 2Cl(−)/H(+) exchange transporter in endosomal function and Dent's disease |
title_full | The CLC-5 2Cl(−)/H(+) exchange transporter in endosomal function and Dent's disease |
title_fullStr | The CLC-5 2Cl(−)/H(+) exchange transporter in endosomal function and Dent's disease |
title_full_unstemmed | The CLC-5 2Cl(−)/H(+) exchange transporter in endosomal function and Dent's disease |
title_short | The CLC-5 2Cl(−)/H(+) exchange transporter in endosomal function and Dent's disease |
title_sort | clc-5 2cl(−)/h(+) exchange transporter in endosomal function and dent's disease |
topic | Physiology |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3510460/ https://www.ncbi.nlm.nih.gov/pubmed/23226131 http://dx.doi.org/10.3389/fphys.2012.00449 |
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