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Cited by 298

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A Na(+)-dependent creatine transporter in rabbit brain, muscle, heart, and kidney. cDNA cloning and functional expression.

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Guimbal, C., Kilimann, M.W.·1993·Journal of Biological Chemistry
DOI 10.1016/s0021-9258(18)52891-x
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Abstract

A cDNA has been cloned from rabbit brain that is a new member of the emerging family of Na(+)-dependent plasma membrane transporters for several neurotransmitters and structurally related compounds. Functional expression of this cDNA in COS-7 cells identifies its product as a Na(+)- and Cl(-)-dependent creatine transporter with a Km of approximately 35 microM. Its creatine transporter activity is efficiently antagonized by 3-guanidinopropionate, a well characterized alternative substrate of creatine transport in several tissues, and by 4-guanidinobutyrate. More distant structural analogues of creatine are much less efficient or inactive as antagonists, indicating a high substrate specificity of the transporter. Northern blot hybridization detects the expression of its mRNA in most tissues tested, most prominently in kidney, heart, and muscle, but not in liver and intestine. A full-length cDNA clone was also isolated from a muscle cDNA library and found to contain the same coding sequence. Substrate affinity and specificity of the cloned transporter are very similar to the endogenous creatine transporter of the COS-7 cells and to the creatine transport activities of several cell types described in the literature. Moreover, its mRNA is most abundant in the tissues known to possess high creatine uptake capacity.

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Metadata

Authors
Guimbal, C., & Kilimann, M. W.
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
1993-04
Volume
268
Issue
12
Pages
8418-8421
ISSN
0021-9258 (ISSN-L)
DOI
10.1016/s0021-9258(18)52891-x
OpenAlex
W1889871926
Cited by
298
References
0
FWCI
9.23
Type
journal article
Language
en
Open access
hybrid

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