Reference: Flick MJ and Konieczny SF (2002) Identification of putative mammalian D-lactate dehydrogenase enzymes. Biochem Biophys Res Commun 295(4):910-6

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Abstract


Mammalian L-isomer dehydrogenases represent an expansive and well characterized class of metabolic enzymes. Surprisingly, little is known regarding their evolutionarily distinct counterparts, D-isomer dehydrogenases, since few mammalian D-isomer 2-hydroxy acid enzymes have been isolated. Here we present the identification and initial characterization of putative human and murine D-lactate dehydrogenases (DLD) that can interact with the muscle-specific cysteine-rich protein CRP3/MLP. Sequence analysis reveals that the human and mouse transcripts encode novel proteins that display strong similarities to the yeast D-lactate dehydrogenase proteins DLD1, AIP2, and YEL071W. Expression analysis of the mammalian proteins indicates widespread distribution with transcripts present in striated muscle tissues and a variety of other tissue types. Immunofluorescence subcellular localization of the mouse DLD protein indicates that it resides within mitochondria, a feature shared by many dehydrogenases. The identification of the human and mouse DLD clones provides new insight regarding the activity of D-isomer-specific enzymes in mammalian cells.

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Journal Article | Research Support, U.S. Gov't, P.H.S.
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Flick MJ, Konieczny SF
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