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The vitamin D receptor (VDR also known as the calcitriol receptor) is a member of the nuclear receptor family of transcription factors. [5] Calcitriol (the active form of vitamin D , 1,25-(OH) 2 vitamin D 3 ) binds to VDR, which then forms a heterodimer with the retinoid-X receptor .
Location of brain regions related to vitamin D. Receptors: In addition to vitamin D metabolites, vitamin D receptor (VDR) proteins are also found in the brain; more specifically, they are found in the cerebellum, thalamus, hypothalamus, basal ganglia, and hippocampus. [1]
Vitamin D response element (VDRE) is a type of DNA sequence that is found in the promoter region of vitamin D regulated genes. This sequence binds the vitamin D receptor (VDR), when complexed with calcitriol (1,25(OH) 2 D), the active form of vitamin D, and so regulates the expression of many genes.
Vitamin D is produced in the keratinocytes of two innermost strata of the epidermis, the stratum basale and stratum spinosum, which also are able to produce calcitriol and express the vitamin D receptor. [183] The 7-dehydrocholesterol reacts with UVB light at wavelengths of 290–315 nm.
[104] [106] Important steps in vitamin D mediated transcriptional regulation include 1) binding of vitamin D on its cognate vitamin D receptor (VDR), 2) the translocation of vitamin D receptor (VDR)-retinoid X receptor heterodimer complex in the nucleus, 3) binding VDR-RXR complex on the TRPV6 gene promoter, 4) recruitment of steroid receptor ...
CYP24A1 is expressed in tissues which are considered targets for vitamin D, including kidney, intestine and bone. Transcription of the CYP24A1 gene is markedly inducible by 1,25-(OH) 2 D 3 binding to the vitamin D receptor. [6] The gene has a strong, positive vitamin D response element in the promoter.
13115 Ensembl ENSG00000111012 ENSMUSG00000006724 UniProt O15528 O35084 RefSeq (mRNA) NM_000785 NM_010009 RefSeq (protein) NP_000776 NP_034139 Location (UCSC) Chr 12: 57.76 – 57.77 Mb Chr 10: 126.88 – 126.89 Mb PubMed search Wikidata View/Edit Human View/Edit Mouse calcidiol 1-monooxygenase Identifiers EC no. 1.14.15.18 CAS no. 9081-36-1 Databases IntEnz IntEnz view BRENDA BRENDA entry ...
CYP2R1 is cytochrome P450 2R1, an enzyme which is the principal vitamin D 25-hydroxylase. [5] [6] In humans it is encoded by the CYP2R1 gene located on chromosome 11p15.2. [7]It is expressed in the endoplasmic reticulum in liver, where it performs the first step in the activation of vitamin D by catalyzing the formation of 25-hydroxyvitamin D. [8]