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RDH8 | retinol dehydrogenase 8 (all-trans); Retinol dehydrogenase with a clear preference for NADP. Converts all-trans-retinal to all-trans-retinol. May play a role in the regeneration of visual pigment at high light intensity (By similarity) (311 aa) | |||
ADH1A | alcohol dehydrogenase 1A (class I), alpha polypeptide (375 aa) | |||
CYP26A1 | cytochrome P450, family 26, subfamily A, polypeptide 1; Plays a key role in retinoic acid metabolism. Acts on retinoids, including all-trans-retinoic acid (RA) and its stereoisomer 9-cis-RA. Capable of both 4-hydroxylation and 18- hydroxylation. Responsible for generation of several hydroxylated forms of RA, including 4-OH-RA, 4-oxo-RA and 18-OH-RA (497 aa) | |||
RDH10 | retinol dehydrogenase 10 (all-trans); Retinol dehydrogenase with a clear preference for NADP. Converts all-trans-retinol to all-trans-retinal. Has no detectable activity towards 11-cis-retinol, 9-cis-retinol and 13-cis-retinol (341 aa) | |||
EIF4B | eukaryotic translation initiation factor 4B; Required for the binding of mRNA to ribosomes. Functions in close association with EIF4-F and EIF4-A. Binds near the 5’- terminal cap of mRNA in presence of EIF-4F and ATP. Promotes the ATPase activity and the ATP-dependent RNA unwinding activity of both EIF4-A and EIF4-F (611 aa) | |||
RPE65 | retinal pigment epithelium-specific protein 65kDa; Plays important roles in the production of 11-cis retinal and in visual pigment regeneration. The soluble form binds vitamin A (all-trans-retinol), making it available for LRAT processing to all-trans-retinyl ester. The membrane form, palmitoylated by LRAT, binds all-trans-retinyl esters, making them available for IMH (isomerohydrolase) processing to all-cis- retinol. The soluble form is regenerated by transferring its palmitoyl groups onto 11-cis-retinol, a reaction catalyzed by LRAT. The enzymatic activity is linearly dependent of th [...] (533 aa) | |||
ADH4 | alcohol dehydrogenase 4 (class II), pi polypeptide (380 aa) | |||
RDH12 | retinol dehydrogenase 12 (all-trans/9-cis/11-cis); Exhibits an oxidoreductive catalytic activity towards retinoids. Most efficient as an NADPH-dependent retinal reductase. Displays high activity toward 9-cis and all-trans-retinol. Also involved in the metabolism of short-chain aldehydes. No steroid dehydrogenase activity detected. Might be the key enzyme in the formation of 11-cis-retinal from 11-cis-retinol during regeneration of the cone visual pigments (316 aa) | |||
RETSAT | retinol saturase (all-trans-retinol 13,14-reductase); Retinol saturase carrying out the saturation of the 13- 14 double bond of all-trans-retinol to produce all-trans-13,14- dihydroretinol. Has activity toward all-trans-retinol as substrate. Does not use all-trans-retinoic acid nor 9-cis, 11-cis or 13-cis-retinol isomers as substrates. May play a role in the metabolism of vitamin A (By similarity) (610 aa) | |||
ADH5 | alcohol dehydrogenase 5 (class III), chi polypeptide; Class-III ADH is remarkably ineffective in oxidizing ethanol, but it readily catalyzes the oxidation of long-chain primary alcohols and the oxidation of S-(hydroxymethyl) glutathione (374 aa) | |||
ADH1B | alcohol dehydrogenase 1B (class I), beta polypeptide (375 aa) | |||
SDR16C5 | short chain dehydrogenase/reductase family 16C, member 5; Oxidoreductase with strong preference for NAD. Active in both the oxidative and reductive directions. Oxidizes all-trans- retinol in all-trans-retinaldehyde. No activity was detected with 11-cis-retinol or 11-cis-retinaldehyde as substrates with either NAD(+)/NADH or NADP(+)/NADPH (309 aa) | |||
DHRS9 | dehydrogenase/reductase (SDR family) member 9; 3-alpha-hydroxysteroid dehydrogenase that converts 3- alpha-tetrahydroprogesterone (allopregnanolone) to dihydroxyprogesterone and 3-alpha-androstanediol to dihydroxyprogesterone. May play a role in the biosynthesis of retinoic acid from retinaldehyde, but seems to have low activity with retinoids. Can utilize both NADH and NADPH (319 aa) | |||
HSD17B6 | hydroxysteroid (17-beta) dehydrogenase 6 homolog (mouse); NAD-dependent oxidoreductase with broad substrate specificity that shows both oxidative and reductive activity (in vitro). Has 17-beta-hydroxysteroid dehydrogenase activity towards various steroids (in vitro). Converts 5-alpha-androstan-3- alpha,17-beta-diol to androsterone and estradiol to estrone (in vitro). Has 3-alpha-hydroxysteroid dehydrogenase activity towards androsterone (in vitro). Has retinol dehydrogenase activity towards all-trans-retinol (in vitro). Can convert androsterone to epi-androsterone. Androsterone is firs [...] (317 aa) | |||
DHRS4L2 | dehydrogenase/reductase (SDR family) member 4 like 2; Probable oxidoreductase (By similarity) (232 aa) | |||
DHRS3 | dehydrogenase/reductase (SDR family) member 3; Catalyzes the reduction of all-trans-retinal to all- trans-retinol in the presence of NADPH (302 aa) | |||
PNPLA4 | patatin-like phospholipase domain containing 4; Lipid hydrolase (253 aa) | |||
ADH6 | alcohol dehydrogenase 6 (class V) (375 aa) | |||
RDH16 | retinol dehydrogenase 16 (all-trans); Oxidoreductase with a preference for NAD. Oxidizes all- trans-retinol and 13-cis-retinol to the corresponding aldehydes. Has higher activity towards CRBP-bound retinol than with free retinol. Oxidizes 3-alpha-hydroxysteroids. Oxidizes androstanediol and androsterone to dihydrotestosterone and androstanedione. Can also catalyze the reverse reaction (317 aa) | |||
ADH7 | alcohol dehydrogenase 7 (class IV), mu or sigma polypeptide; Could function in retinol oxidation for the synthesis of retinoic acid, a hormone important for cellular differentiation. Medium-chain (octanol) and aromatic (m-nitrobenzaldehyde) compounds are the best substrates. Ethanol is not a good substrate but at the high ethanol concentrations reached in the digestive tract, it plays a role in the ethanol oxidation and contributes to the first pass ethanol metabolism (394 aa) |