LRAT gene

lecithin retinol acyltransferase

The information on this page was automatically extracted from online scientific databases.

From NCBI Gene:

The protein encoded by this gene localizes to the endoplasmic reticulum, where it catalyzes the esterification of all-trans-retinol into all-trans-retinyl ester. This reaction is an important step in vitamin A metabolism in the visual system. Mutations in this gene have been associated with early-onset severe retinal dystrophy and Leber congenital amaurosis 14. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Aug 2014]

From UniProt:

Transfers the acyl group from the sn-1 position of phosphatidylcholine to all-trans retinol, producing all-trans retinyl esters (PubMed:9920938). Retinyl esters are storage forms of vitamin A (Probable). LRAT plays a critical role in vision (Probable). It provides the all-trans retinyl ester substrates for the isomerohydrolase which processes the esters into 11-cis-retinol in the retinal pigment epithelium; due to a membrane-associated alcohol dehydrogenase, 11 cis-retinol is oxidized and converted into 11-cis-retinaldehyde which is the chromophore for rhodopsin and the cone photopigments (Probable). Required for the survival of cone photoreceptors and correct rod photoreceptor cell morphology (By similarity).

Covered on Genetics Home Reference:

From NCBI Gene:

  • Leber congenital amaurosis 14
  • Retinitis pigmentosa

From UniProt:

Leber congenital amaurosis 14 (LCA14): A severe dystrophy of the retina, typically becoming evident in the first years of life. Visual function is usually poor and often accompanied by nystagmus, sluggish or near-absent pupillary responses, photophobia, high hyperopia and keratoconus. [MIM:613341]

Cytogenetic Location: 4q32.1, which is the long (q) arm of chromosome 4 at position 32.1

Molecular Location: base pairs 154,740,841 to 154,753,120 on chromosome 4 (Homo sapiens Updated Annotation Release 109.20190607, GRCh38.p13) (NCBI)

Cytogenetic Location: 4q32.1, which is the long (q) arm of chromosome 4 at position 32.1