@article {7487,
	title = {Low-Frequency Synonymous Coding Variation in CYP2R1 Has Large Effects on Vitamin D Levels and Risk of Multiple Sclerosis.},
	journal = {Am J Hum Genet},
	volume = {101},
	year = {2017},
	month = {2017 Aug 03},
	pages = {227-238},
	abstract = {<p>Vitamin D insufficiency is common, correctable, and influenced by genetic factors, and it has been associated with risk of several diseases. We sought to identify low-frequency genetic variants that strongly increase the risk of vitamin D insufficiency and tested their effect on risk of multiple sclerosis, a disease influenced by low vitamin D concentrations. We used whole-genome sequencing data from 2,619 individuals through the UK10K program and deep-imputation data from 39,655 individuals genotyped genome-wide. Meta-analysis of the summary statistics from 19 cohorts identified in CYP2R1 the low-frequency (minor allele frequency = 2.5\%) synonymous coding variant g.14900931G>A (p.Asp120Asp) (rs117913124[A]), which conferred a large effect on 25-hydroxyvitamin D (25OHD) levels (-0.43 SD of standardized natural log-transformed 25OHD per A allele; p value = 1.5~{\texttimes} 10(-88)). The effect on 25OHD was four times larger and independent of the effect of a previously described common variant near CYP2R1. By analyzing 8,711 individuals, we showed that heterozygote carriers of this low-frequency variant have an increased risk of vitamin D insufficiency (odds ratio [OR] = 2.2, 95\% confidence interval [CI] = 1.78-2.78, p = 1.26~{\texttimes} 10(-12)). Individuals carrying one copy of this variant also had increased odds of multiple sclerosis (OR = 1.4, 95\% CI = 1.19-1.64, p = 2.63~{\texttimes} 10(-5)) in a sample of 5,927 case and 5,599 control subjects. In~conclusion, we describe a low-frequency CYP2R1 coding variant that exerts the largest effect upon 25OHD levels identified to date in the general European population and implicates vitamin D in the etiology of multiple sclerosis.</p>},
	keywords = {Cholestanetriol 26-Monooxygenase, Cytochrome P450 Family 2, Gene Frequency, Genetic Predisposition to Disease, Genome, Human, Genome-Wide Association Study, Humans, Multiple Sclerosis, Polymorphism, Single Nucleotide, Risk Factors, Vitamin D, Vitamin D Deficiency},
	issn = {1537-6605},
	doi = {10.1016/j.ajhg.2017.06.014},
	author = {Manousaki, Despoina and Dudding, Tom and Haworth, Simon and Hsu, Yi-Hsiang and Liu, Ching-Ti and Medina-G{\'o}mez, Carolina and Voortman, Trudy and van der Velde, Nathalie and Melhus, H{\r a}kan and Robinson-Cohen, Cassianne and Cousminer, Diana L and Nethander, Maria and Vandenput, Liesbeth and Noordam, Raymond and Forgetta, Vincenzo and Greenwood, Celia M T and Biggs, Mary L and Psaty, Bruce M and Rotter, Jerome I and Zemel, Babette S and Mitchell, Jonathan A and Taylor, Bruce and Lorentzon, Mattias and Karlsson, Magnus and Jaddoe, Vincent V W and Tiemeier, Henning and Campos-Obando, Natalia and Franco, Oscar H and Utterlinden, Andre G and Broer, Linda and van Schoor, Natasja M and Ham, Annelies C and Ikram, M Arfan and Karasik, David and de Mutsert, Ren{\'e}e and Rosendaal, Frits R and den Heijer, Martin and Wang, Thomas J and Lind, Lars and Orwoll, Eric S and Mook-Kanamori, Dennis O and Micha{\"e}lsson, Karl and Kestenbaum, Bryan and Ohlsson, Claes and Mellstr{\"o}m, Dan and de Groot, Lisette C P G M and Grant, Struan F A and Kiel, Douglas P and Zillikens, M Carola and Rivadeneira, Fernando and Sawcer, Stephen and Timpson, Nicholas J and Richards, J Brent}
}
