scholarly journals Boosting ER folding capacity reduces UPR activation and intracellular accumulation of human kidney anion exchanger 1 in S. cerevisiae

Yeast ◽  
2021 ◽  
Author(s):  
Xiaobing Li ◽  
Emmanuelle Cordat ◽  
Manfred J. Schmitt ◽  
Björn Becker
2006 ◽  
Vol 29 (1) ◽  
pp. 14-22
Author(s):  
Phonphimon Wongthida ◽  
Varaporn Akkarapatumwong ◽  
Thawornchai Limjindaporn ◽  
Saranya Kittanakom ◽  
Thitima Keskanokwong ◽  
...  

2008 ◽  
Vol 121 (20) ◽  
pp. 3422-3432 ◽  
Author(s):  
R. C. Williamson ◽  
A. C. N. Brown ◽  
W. J. Mawby ◽  
A. M. Toye

2011 ◽  
Vol 413 (1) ◽  
pp. 69-74 ◽  
Author(s):  
Natapol Duangtum ◽  
Mutita Junking ◽  
Nunghathai Sawasdee ◽  
Boonyarit Cheunsuchon ◽  
Thawornchai Limjindaporn ◽  
...  

mSphere ◽  
2020 ◽  
Vol 5 (1) ◽  
Author(s):  
Hasib A. M. Sarder ◽  
Xiaobing Li ◽  
Charlotta Funaya ◽  
Emmanuelle Cordat ◽  
Manfred J. Schmitt ◽  
...  

ABSTRACT Saccharomyces cerevisiae has been frequently used to study biogenesis, functionality, and intracellular transport of various renal proteins, including ion channels, solute transporters, and aquaporins. Specific mutations in genes encoding most of these renal proteins affect kidney function in such a way that various disease phenotypes ultimately occur. In this context, human kidney anion exchanger 1 (kAE1) represents an important bicarbonate/chloride exchanger which maintains the acid-base homeostasis in the human body. Malfunctions in kAE1 lead to a pathological phenotype known as distal renal tubular acidosis (dRTA). Here, we evaluated the potential of baker's yeast as a model system to investigate different cellular aspects of kAE1 physiology. For the first time, we successfully expressed yeast codon-optimized full-length versions of tagged and untagged wild-type kAE1 and demonstrated their partial localization at the yeast plasma membrane (PM). Finally, pH and chloride measurements further suggest biological activity of full-length kAE1, emphasizing the potential of S. cerevisiae as a model system for studying trafficking, activity, and/or degradation of mammalian ion channels and transporters such as kAE1 in the future. IMPORTANCE Distal renal tubular acidosis (dRTA) is a common kidney dysfunction characterized by impaired acid secretion via urine. Previous studies revealed that α-intercalated cells of dRTA patients express mutated forms of human kidney anion exchanger 1 (kAE1) which result in inefficient plasma membrane targeting or diminished expression levels of kAE1. However, the precise dRTA-causing processes are inadequately understood, and alternative model systems are helpful tools to address kAE1-related questions in a fast and inexpensive way. In contrast to a previous study, we successfully expressed full-length kAE1 in Saccharomyces cerevisiae. Using advanced microscopy techniques as well as different biochemical and functionality assays, plasma membrane localization and biological activity were confirmed for the heterologously expressed anion transporter. These findings represent first important steps to use the potential of yeast as a model organism for studying trafficking, activity, and degradation of kAE1 and its mutant variants in the future.


2010 ◽  
Vol 401 (1) ◽  
pp. 85-91 ◽  
Author(s):  
Nunghathai Sawasdee ◽  
Mutita Junking ◽  
Piengpaga Ngaojanlar ◽  
Nattakan Sukomon ◽  
Duangporn Ungsupravate ◽  
...  

2015 ◽  
Vol 463 (4) ◽  
pp. 706-711
Author(s):  
Nalin-on Nuiplot ◽  
Mutita Junking ◽  
Natapol Duangtum ◽  
Sasiprapa Khunchai ◽  
Nunghathai Sawasdee ◽  
...  

1993 ◽  
Vol 265 (6) ◽  
pp. F813-F821 ◽  
Author(s):  
A. Kollert-Jons ◽  
S. Wagner ◽  
S. Hubner ◽  
H. Appelhans ◽  
D. Drenckhahn

Acid-secreting intercalated cells of the kidney collecting duct and tumor cells of renal oncocytoma express an anion exchanger that is immunologically related but not identical to the chloride-bicarbonate anion exchanger of erythrocytes (AE1). In this study, we have mapped the binding site of a monoclonal antibody against erythroid AE1 that does not react with either intercalated cells or oncocytoma. The epitope is located close to the NH2 terminus of AE1, indicating that AE1 in intercalated cells and oncocytoma differs in its NH2 terminus from erythroid AE1. This conclusion was supported by an antibody directed against residues 1-14 of erythroid AE1 that does not react with intercalated cells in oncocytoma. Polymerase chain reaction performed with mRNA from a human kidney revealed that the sequence containing the codons for Met-1 and Met-33 in erythroid mRNA is missing in the kidney transcript, whereas the sequence coding for Met-66 is present. DNA sequence data derived from cloning the 5' end of the human kidney AE1 mRNA clearly showed that the 5' untranslated region comprises part of intron 3, the complete exon 4 that is followed by exon 5 containing Met-66 as the site of translation initiation. Altogether, the results indicate that AE1 in the human kidney is an amino-terminally truncated form of erythroid AE1 that is restricted to the basolateral membrane domain of the acid-secreting intercalated cells of the collecting duct and is also expressed in oncocytoma.


Traffic ◽  
2014 ◽  
Vol 15 (7) ◽  
pp. 788-802 ◽  
Author(s):  
Mutita Junking ◽  
Nunghathai Sawasdee ◽  
Natapol Duangtum ◽  
Boonyarit Cheunsuchon ◽  
Thawornchai Limjindaporn ◽  
...  

PEDIATRICS ◽  
2003 ◽  
Vol 112 (6) ◽  
pp. 1361-1367 ◽  
Author(s):  
L. Cheidde ◽  
T. C. Vieira ◽  
P. R. M. Lima ◽  
S. T. O. Saad ◽  
I. P. Heilberg

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