Electro-neutral KCl co-transporters have been described in a number of different cell types and play important roles in cell volume regulation and in trans-epithelial chloride transport in many nephron segments. The study of KCl co-transporters was limited by a lack of molecular information. Recently the first KCl co-transporter was cloned. Subsequently the principal investigator has cloned two completely new co-transporters KCC3 and KCC4. The long-term goals of this grant proposal are to clarify the molecular mechanisms and physiological role of these KCl co-transporters. Using the newly completed protein sequences the principal investigator has designed a panel of specific antibodies. The goal is to use these antibodies to study the distribution and regulation of the three renal KCCs. Functional studies of these co-transporters will determine which intracellular amino acids determine the volume sensitivity of KCC3 and KCC4 and which transmembrane amino acids determine cation affinity.

Agency
National Institute of Health (NIH)
Institute
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
Type
Research Project (R01)
Project #
5R01DK057708-02
Application #
6381808
Study Section
General Medicine B Study Section (GMB)
Program Officer
Scherbenske, M James
Project Start
2000-05-01
Project End
2001-10-31
Budget Start
2001-05-01
Budget End
2001-10-31
Support Year
2
Fiscal Year
2001
Total Cost
$137,438
Indirect Cost
Name
Vanderbilt University Medical Center
Department
Internal Medicine/Medicine
Type
Schools of Medicine
DUNS #
004413456
City
Nashville
State
TN
Country
United States
Zip Code
37212
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