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A novel human mutation in the SLC9A1 gene results in abolition of na+/H+ exchanger activity
Download2015-01-01
The SLC9A1 gene, the Na+/H+ exchanger isoform 1 is the principal plasma membrane Na+/H+ exchanger of mammalian cells and functions by exchanging one intracellular proton for one extracellular sodium. The human protein is 815 amino acids in length. Five hundred N-terminal amino acids make up the...
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2011-01-01
Karki, Pratap, Li, Xiuju J., Schrama, David, Fliegel, Larry
The serine/threonine kinase B-Raf is the second most frequently occurring human oncogene after Ras. Mutations of B-Raf occur with the highest incidences in melanoma, and the most common mutant, V600E, renders B-Raf constitutively active. The sodium proton exchanger isoform 1 (NHE1) is a...
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2002-01-01
Li, Xiuju J., Alvarez, Bernando, Casey, Joseph R., Reithmeier, Reinhart A. F., Fliegel, Larry
We examined the ability of carbonic anhydrase II to bind to and affect the transport efficiency of the NHE1 isoform of the mammalian Na+/H+ exchanger. The C-terminal region of NHE1 was expressed in Escherichia coli fused with an N-terminal glutathionineS-transferase or with a C-terminal...
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Dimeric structure of human na+/H+ exchanger isoform 1 overproduced in saccharomyces cerevisiae
Download2008-01-01
Moncoq, Karine, Kemp, Grant, Li, Xiuju J., Fliegel, Larry, Young, Howard S.
The Na+/H+ exchanger isoform 1 (NHE1) is an integral membrane protein that regulates intracellular pH by extruding an intracellular H+ in exchange for one extracellular Na+. The human NHE1 isoform is involved in heart disease and cell growth and proliferation. Although details of NHE1 regulation...
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Stop codon polymorphisms in the human SLC9A1 gene disrupt or compromise na+/H+ exchanger function
Download2016-01-01
Li, Xiuju J., Augustine, Aruna, Chen, Shuo, Fliegel, Larry
The NHE1 isoform of the mammalian Na+/H+ exchanger is a ubiquitous plasma membrane protein that regulates intracellular pH in mammalian cells by removing one intracellular proton in exchange for one extracellular sodium. Deletion of the NHE1 gene (SLC9A1) affects the growth and motor ability of...
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Structural and functional analysis of transmembrane XI of the NHE1 isoform of the na+/H+ exchanger
Download2009-01-01
Lee, Brian L., Li, Xiuju J., Liu, Yongsheng, Sykes, Brian D., Fliegel, Larry
The Na+/H+ exchanger isoform 1 is a ubiquitously expressed integral membrane protein that regulates intracellular pH in mammals by extruding an intracellular H+ in exchange for one extracellular Na+. We characterized structural and functional aspects of the critical transmembrane (TM) segment XI...
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Structural and functional characterization of transmembrane segment IV of the NHE1 isoform of the na+/H+ exchanger
Download2005-01-01
Slepkov, Emily R., Rainey, Jan K., Li, Xiuju J., Liu, Yonghsheng S., Cheng, Florence J., Lindhout, Darrin A., Sykes, Brian D., Fliegel, Larry
The Na+/H+ exchanger isoform 1 is a ubiquitously expressed integral membrane protein that regulates intracellular pH in mammals. We characterized the structural and functional aspects of the critical transmembrane (TM) segment IV. Each residue was mutated to cysteine in cysteine-less NHE1. TM IV...
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Structural and functional characterization of transmembrane segment IX of the NHE1 isoform of the na(+)/H(+) exchanger
Download2008-01-01
Reddy, Tyler, Ding, Jie, Li, Xiuju J., Sykes, Brian D., Rainey, Jan K., Fliegel, Larry
The Na+/H+ exchanger isoform 1 (NHE1) is an integral membrane protein that regulates intracellular pH by removing one intracellular H+ in exchange for one extracellular Na+. It has a large N-terminal membrane domain of 12 transmembrane segments and an intracellular C-terminal regulatory domain....
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2002-01-01
Li, Xiuju J., Misik, Angelika J., Rieder, Carmen V., Solaro, R. John, Lowen, Anice, Fliegel, Larry
In this paper we examine the role of thyroid hormone in regulating expression of the Na+/H+ exchanger. Thyroid hormone has been reported to regulate the activity of the Na+/H+ exchanger messenger RNA in some cell types. Treatment of cardiac myocytes with 3,5′,3′-triiodothyronine results in an...