chr5-75345735-G-C

Variant names:

• chr5-75345735-G-C
• rs10515198
• NM_000859.3:c.450+77G>C

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_000859.3(HMGCR):​c.450+77G>C variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000138 in 722,934 control chromosomes in the GnomAD database, with no homozygous occurrence. 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: not found (cov: 32)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: HMGCR NM_000859.3 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.771
• Publications: 0 publications found

Genes affected

HMGCR (HGNC:5006): (3-hydroxy-3-methylglutaryl-CoA reductase) HMG-CoA reductase is the rate-limiting enzyme for cholesterol synthesis and is regulated via a negative feedback mechanism mediated by sterols and non-sterol metabolites derived from mevalonate, the product of the reaction catalyzed by reductase. Normally in mammalian cells this enzyme is suppressed by cholesterol derived from the internalization and degradation of low density lipoprotein (LDL) via the LDL receptor. Competitive inhibitors of the reductase induce the expression of LDL receptors in the liver, which in turn increases the catabolism of plasma LDL and lowers the plasma concentration of cholesterol, an important determinant of atherosclerosis. Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Aug 2008]

HMGCR Gene-Disease associations (from GenCC):

• muscular dystrophy, limb-girdle, autosomal recessive 28

  Inheritance: AR Classification: STRONG, MODERATE Submitted by: G2P, Labcorp Genetics (formerly Invitae)

ACMG classification

Our verdict: Likely_benign. The variant received -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.86).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
HMGCR	NM_000859.3	c.450+77G>C		intron_variant	Intron 5 of 19	ENST00000287936.9	NP_000850.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
HMGCR	ENST00000287936.9	c.450+77G>C		intron_variant	Intron 5 of 19	1	NM_000859.3	ENSP00000287936.4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000138 AC: 1 AN: 722934 Hom.: 0 AF XY: 0.00000260 AC XY: 1 AN XY: 385272

African (AFR) AF: 0.00 AC: 0 AN: 17952

American (AMR) AF: 0.00 AC: 0 AN: 36070

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 20144

East Asian (EAS) AF: 0.00 AC: 0 AN: 35524

South Asian (SAS) AF: 0.00 AC: 0 AN: 65880

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 49032

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 4144

European-Non Finnish (NFE) AF: 0.00000218 AC: 1 AN: 458608

Other (OTH) AF: 0.00 AC: 0 AN: 35580

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.86
CADD	Benign	1.8
DANN	Benign	0.66
PhyloP100		-0.77

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.0		Details are displayed if max score is > 0.2

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

Other links and lift over

dbSNP: rs10515198; hg19: chr5-74641560;