rs752952700

Variant names:

• chr11-71444155-G-A
• rs752952700
• NM_001360.3:c.159C>T

Variant summary

Our verdict is Benign. The variant received -8 ACMG points: 2P and 10B. PM2 BP4_Moderate BP6_Very_Strong

The NM_001425117.1(DHCR7):​c.-16C>T variant causes a 5 prime UTR premature start codon gain change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000211 in 1,610,430 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

• Frequency:
  • Genomes: 𝑓 0.000033 (0 hom., cov: 32)
  • Exomes 𝑓: 0.000020 (0 hom.)
• Consequence: DHCR7 NM_001425117.1 5_prime_UTR_premature_start_codon_gain
• Clinical Significance: Likely benign criteria provided, multiple submitters, no conflicts B:4
• Conservation: PhyloP100: -0.500
• Publications: 0 publications found

Genes affected

DHCR7 (HGNC:2860): (7-dehydrocholesterol reductase) This gene encodes an enzyme that removes the C(7-8) double bond in the B ring of sterols and catalyzes the conversion of 7-dehydrocholesterol to cholesterol. This gene is ubiquitously expressed and its transmembrane protein localizes to the endoplasmic reticulum membrane and nuclear outer membrane. Mutations in this gene cause Smith-Lemli-Opitz syndrome (SLOS); a syndrome that is metabolically characterized by reduced serum cholesterol levels and elevated serum 7-dehydrocholesterol levels and phenotypically characterized by cognitive disability, facial dysmorphism, syndactyly of second and third toes, and holoprosencephaly in severe cases to minimal physical abnormalities and near-normal intelligence in mild cases. Alternative splicing results in multiple transcript variants that encode the same protein.[provided by RefSeq, Aug 2009]

DHCR7 Gene-Disease associations (from GenCC):

• Smith-Lemli-Opitz syndrome

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), G2P, Myriad Women’s Health, ClinGen, Orphanet, Laboratory for Molecular Medicine

ACMG classification

Our verdict: Benign. The variant received -8 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.41).
• BP6: Variant 11-71444155-G-A is Benign according to our data. Variant chr11-71444155-G-A is described in ClinVar as Likely_benign. ClinVar VariationId is 528376.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001425117.1. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	DHCR7	NM_001360.3	MANE Select	c.159C>T	p.Ile53Ile	synonymous	Exon 4 of 9	NP_001351.2	A0A024R5F7
	DHCR7	NM_001425117.1		c.-16C>T		5_prime_UTR_premature_start_codon_gain	Exon 4 of 9	NP_001412046.1	E9PM00
	DHCR7	NM_001425107.1		c.159C>T	p.Ile53Ile	synonymous	Exon 4 of 10	NP_001412036.1	A0A804HI25

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	DHCR7	ENST00000355527.8	TSL:1 MANE Select	c.159C>T	p.Ile53Ile	synonymous	Exon 4 of 9	ENSP00000347717.4	Q9UBM7
	DHCR7	ENST00000407721.6	TSL:1	c.159C>T	p.Ile53Ile	synonymous	Exon 4 of 9	ENSP00000384739.2	Q9UBM7
	DHCR7	ENST00000685320.1		c.-333-94C>T		intron	N/A	ENSP00000509319.1	B4E1K5

Frequencies

GnomAD3 genomes AF: 0.0000329 AC: 5 AN: 152184 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.0000241

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000588

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.0000410 AC: 10 AN: 244114 AF XY: 0.0000455

Gnomad AFR exome AF: 0.0000648

Gnomad AMR exome AF: 0.000177

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000199 AC: 29 AN: 1458246 Hom.: 0 Cov.: 35 AF XY: 0.0000207 AC XY: 15 AN XY: 725012

African (AFR) AF: 0.0000299 AC: 1 AN: 33448

American (AMR) AF: 0.000136 AC: 6 AN: 44126

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26038

East Asian (EAS) AF: 0.00 AC: 0 AN: 39614

South Asian (SAS) AF: 0.0000350 AC: 3 AN: 85614

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53108

Middle Eastern (MID) AF: 0.000173 AC: 1 AN: 5764

European-Non Finnish (NFE) AF: 0.0000162 AC: 18 AN: 1110250

Other (OTH) AF: 0.00 AC: 0 AN: 60284

GnomAD4 genome AF: 0.0000329 AC: 5 AN: 152184 Hom.: 0 Cov.: 32 AF XY: 0.0000404 AC XY: 3 AN XY: 74348

African (AFR) AF: 0.0000241 AC: 1 AN: 41440

American (AMR) AF: 0.00 AC: 0 AN: 15286

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3472

East Asian (EAS) AF: 0.00 AC: 0 AN: 5188

South Asian (SAS) AF: 0.00 AC: 0 AN: 4824

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10626

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 316

European-Non Finnish (NFE) AF: 0.0000588 AC: 4 AN: 68032

Other (OTH) AF: 0.00 AC: 0 AN: 2090

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.0000113

ClinVar

ClinVar submissions

Significance: Likely benign

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
-	-	2	Smith-Lemli-Opitz syndrome (2)
-	-	1	DHCR7-related disorder (1)
-	-	1	not provided (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.41
CADD	Benign	6.0
DANN	Benign	0.84
PhyloP100		-0.50
Mutation Taster		=98/2	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.11		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: rs752952700; hg19: chr11-71155201; COSMIC: COSV62795779; COSMIC: COSV62795779;