chr12-57768181-G-C

Position:

• chr12-57768181-G-C

Variant summary

Our verdict is Benign. Variant got -12 ACMG points: 0P and 12B. BP4_Strong BA1

The ENST00000546609.1(CYP27B1):​c.105+699C>G variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00389 in 152,262 control chromosomes in the GnomAD database, including 17 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: 𝑓 0.0039 (17 hom., cov: 33)
• Consequence: CYP27B1 ENST00000546609.1 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.891

Genes affected

CYP27B1 (HGNC:2606): (cytochrome P450 family 27 subfamily B member 1) This gene encodes a member of the cytochrome P450 superfamily of enzymes. The cytochrome P450 proteins are monooxygenases which catalyze many reactions involved in drug metabolism and synthesis of cholesterol, steroids and other lipids. The protein encoded by this gene localizes to the inner mitochondrial membrane where it hydroxylates 25-hydroxyvitamin D3 at the 1alpha position. This reaction synthesizes 1alpha,25-dihydroxyvitamin D3, the active form of vitamin D3, which binds to the vitamin D receptor and regulates calcium metabolism. Thus this enzyme regulates the level of biologically active vitamin D and plays an important role in calcium homeostasis. Mutations in this gene can result in vitamin D-dependent rickets type I. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Benign. Variant got -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.88).
• BA1: GnomAd4 highest subpopulation (SAS) allele frequency at 95% confidence interval = 0.0615 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CYP27B1	ENST00000546609.1	c.105+699C>G		intron_variant		5

Frequencies

GnomAD3 genomes AF: 0.00379 AC: 577 AN: 152144 Hom.: 13 Cov.: 33

Gnomad AFR AF: 0.00113

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00236

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00404

Gnomad SAS AF: 0.0673

Gnomad FIN AF: 0.000755

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00196

Gnomad OTH AF: 0.00335

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.00389 AC: 593 AN: 152262 Hom.: 17 Cov.: 33 AF XY: 0.00471 AC XY: 351 AN XY: 74456

Gnomad4 AFR AF: 0.00113

Gnomad4 AMR AF: 0.00235

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00405

Gnomad4 SAS AF: 0.0676

Gnomad4 FIN AF: 0.000755

Gnomad4 NFE AF: 0.00196

Gnomad4 OTH AF: 0.0104

Alfa AF: 0.000796 Hom.: 0

Bravo AF: 0.00207

Asia WGS AF: 0.0640 AC: 223 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.88
CADD	Benign	2.7
DANN	Benign	0.69

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Other links and lift over

dbSNP: rs8176339; hg19: chr12-58161964;