Another member of the short-chain dehydrogenases/reductases (SDR) family, RDH5, can (reversibly) catalyse the oxidation of 11-cis-retinol (11cROL) to 11-cis-retinal (11cRAL) in retinal pigment epithelium (RPE) cells using NAD+ as cofactor (Simon et al. 1996, Gonzalez-Fernandez et al. 1999). Cellular retinaldehyde-binding protein (RLBP1), the protein bound to 11cRAL in RPE, is not present in photoreceptor cells.
Simon, A, Lagercrantz, J, Bajalica-Lagercrantz, S, Eriksson, U
Conway, BP, Kurz, D, Khani, SC, Gonzalez-Fernandez, F, Young, JE, Newman, S, Bao, Y, Han, DP
NAD-retinol dehydrogenase activity of RDH5(1-318)-like Proteins [endoplasmic reticulum membrane]
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