chr1-54871495-G-A

Variant names:

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 1P and 1B. PP3BS1_Supporting

The NM_014762.4(DHCR24):c.731C>T(p.Pro244Leu) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000915 in 1,614,108 control chromosomes in the GnomAD database, including 2 homozygotes. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.00058 ( 1 hom., cov: 32)

Exomes 𝑓: 0.00095 ( 1 hom. )

Consequence

DHCR24
NM_014762.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:7

Conservation

PhyloP100: 9.92

Variant links:

Genes affected

DHCR24 (HGNC:2859): (24-dehydrocholesterol reductase) This gene encodes a flavin adenine dinucleotide (FAD)-dependent oxidoreductase which catalyzes the reduction of the delta-24 double bond of sterol intermediates during cholesterol biosynthesis. The protein contains a leader sequence that directs it to the endoplasmic reticulum membrane. Missense mutations in this gene have been associated with desmosterolosis. Also, reduced expression of the gene occurs in the temporal cortex of Alzheimer disease patients and overexpression has been observed in adrenal gland cancer cells. [provided by RefSeq, Jul 2008]

DHCR24 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 0 ACMG points.

PP3

MetaRNN computational evidence supports a deleterious effect, 0.779

BS1

Variant frequency is greater than expected in population nfe. gnomad4 allele frequency = 0.000578 (88/152220) while in subpopulation NFE AF= 0.001 (68/68034). AF 95% confidence interval is 0.000808. There are 1 homozygotes in gnomad4. There are 37 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
DHCR24	NM_014762.4 link	c.731C>T	p.Pro244Leu	missense_variant	Exon 5 of 9	ENST00000371269.9	NP_055577.1	Q15392-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
DHCR24	ENST00000371269.9 link	c.731C>T	p.Pro244Leu	missense_variant	Exon 5 of 9	1	NM_014762.4	ENSP00000360316.3		Q15392-1

Frequencies

GnomAD3 genomes

AF:

0.000578

AC:

AN:

152220

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000217

Gnomad AMI

AF:

0.00110

Gnomad AMR

AF:

0.000589

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000999

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000573

AC:

144

AN:

251406

Hom.:

AF XY:

0.000684

AC XY:

AN XY:

135880

show subpopulations

Gnomad AFR exome

AF:

0.000123

Gnomad AMR exome

AF:

0.000405

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.000327

Gnomad FIN exome

AF:

0.0000924

Gnomad NFE exome

AF:

0.00101

Gnomad OTH exome

AF:

0.000163

GnomAD4 exome

AF:

0.000950

AC:

1389

AN:

1461888

Hom.:

Cov.:

AF XY:

0.000949

AC XY:

690

AN XY:

727244

show subpopulations

Gnomad4 AFR exome

AF:

0.000388

Gnomad4 AMR exome

AF:

0.000447

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.000243

Gnomad4 FIN exome

AF:

0.0000936

Gnomad4 NFE exome

AF:

0.00117

Gnomad4 OTH exome

AF:

0.000414

GnomAD4 genome

AF:

0.000578

AC:

AN:

152220

Hom.:

Cov.:

AF XY:

0.000498

AC XY:

AN XY:

74364

show subpopulations

Gnomad4 AFR

AF:

0.000217

Gnomad4 AMR

AF:

0.000589

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000207

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000999

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.00102

Hom.:

Bravo

AF:

0.000620

TwinsUK

AF:

0.000270

AC:

ALSPAC

AF:

0.00104

AC:

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.00116

AC:

ExAC

AF:

0.000519

AC:

EpiCase

AF:

0.000981

EpiControl

AF:

0.000771

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:7

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Uncertain:3

Breakthrough Genomics, Breakthrough Genomics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: not provided

- -

Apr 27, 2017

Eurofins Ntd Llc (ga)

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Oct 21, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces proline, which is neutral and non-polar, with leucine, which is neutral and non-polar, at codon 244 of the DHCR24 protein (p.Pro244Leu). This variant is present in population databases (rs138667252, gnomAD 0.1%), including at least one homozygous and/or hemizygous individual. This variant has not been reported in the literature in individuals affected with DHCR24-related conditions. ClinVar contains an entry for this variant (Variation ID: 284658). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) has been performed at Invitae for this missense variant, however the output from this modeling did not meet the statistical confidence thresholds required to predict the impact of this variant on DHCR24 protein function. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Desmosterolosis

Uncertain:2

Oct 31, 2018

Fulgent Genetics, Fulgent Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Apr 27, 2017

Illumina Laboratory Services, Illumina

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). No publications were found based on this search. Allele frequency data from public databases did not allow this variant to be ruled in or out of causing disease. Therefore, this variant is classified as a variant of unknown significance. -

not specified

Uncertain:1

Jan 09, 2017

Genetic Services Laboratory, University of Chicago

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Inborn genetic diseases

Uncertain:1

Jan 31, 2022

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.731C>T (p.P244L) alteration is located in exon 5 (coding exon 5) of the DHCR24 gene. This alteration results from a C to T substitution at nucleotide position 731, causing the proline (P) at amino acid position 244 to be replaced by a leucine (L). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.49

BayesDel_addAF

Pathogenic

0.19

BayesDel_noAF

Pathogenic

0.44

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Pathogenic

0.85

D;D;.;D

Eigen

Pathogenic

0.87

Eigen_PC

Pathogenic

0.79

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Uncertain

0.94

.;.;D;D

M_CAP

Uncertain

0.16

MetaRNN

Pathogenic

0.78

D;D;D;D

MetaSVM

Pathogenic

0.96

MutationAssessor

Pathogenic

3.3

M;M;.;M

PrimateAI

Uncertain

0.57

PROVEAN

Pathogenic

-9.1

.;D;.;.

REVEL

Pathogenic

0.74

Sift

Uncertain

0.0010

.;D;.;.

Sift4G

Uncertain

0.0030

.;D;.;.

Polyphen

1.0

D;D;.;D

Vest4

0.83

MVP

0.92

MPC

1.2

ClinPred

0.49

GERP RS

5.3

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.66

gMVP

0.87

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

Details are displayed if max score is > 0.2

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

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over