RGD Reference Report - Cloning of a cDNA for a second retinol dehydrogenase type II. Expression of its mRNA relative to type I. - Rat Genome Database

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Cloning of a cDNA for a second retinol dehydrogenase type II. Expression of its mRNA relative to type I.

Authors: Chai, X  Zhai, Y  Popescu, G  Napoli, JL 
Citation: Chai X, etal., J Biol Chem 1995 Nov 24;270(47):28408-12.
RGD ID: 1299624
Pubmed: PMID:7499345   (View Abstract at PubMed)

A retinol dehydrogenase, RoDH(1), which recognizes holo-cellular retinol-binding protein (CRBP) as substrate, has been cloned, expressed, and identified as a short-chain dehydrogenase/reductase (Chai, X., Boerman, M. H. E. M., Zhai, Y., and Napoli, J. L. (1995) J. Biol. Chem. 270, 3900-3904). This work reports the cloning and expression of a cDNA encoding a RoDH isozyme, RoDH(II). The predicted amino acid sequence verifies RoDH(II) as a short-chain dehydrogenase/reductase, 82% identical with RoDH(I). RoDH(II) recognized the physiological form of retinol as substrate, CRBP, with a Km of 2 mM. Similar to microsomal RoDH and RoDH(I), RoDH(II) had higher activity with NADP rather than NAD, was stimulated by ethanol and phosphatidyl choline, was not inhibited by the medium-chain alcohol dehydrogenase inhibitor 4-methylpyrazole, but was inhibited by phenylarsine oxide and the short-chain dehydrogenase/reductase inhibitor carbenoxolone. Northern blot analysis detected RoDH(I) and RoDH(II) mRNA only in rat liver, but RNase protection assays revealed RoDH(I) and RoHD(II) mRNA in kidney, lung, testis, and brain. These data indicate that short-chain dehydrogenases/reductase isozymes expressed tissue-distinctively catalyze the first step of retinoic acid biogenesis from the physiologically most abundant substrate, CRBP.



Gene Ontology Annotations    Click to see Annotation Detail View

Biological Process

  
Object SymbolSpeciesTermQualifierEvidenceWithNotesSourceOriginal Reference(s)
Rdh16Ratretinoic acid metabolic process  IDA  RGD 
Rdh16Ratretinol metabolic process  IDA  RGD 

Molecular Function

  
Object SymbolSpeciesTermQualifierEvidenceWithNotesSourceOriginal Reference(s)
Rdh16Ratall-trans-retinol dehydrogenase (NAD+) activity  IDA  RGD 

Objects Annotated

Genes (Rattus norvegicus)
Rdh16  (retinol dehydrogenase 16)


Additional Information