Genetic Variant NM_018000.3:c.13G>A (chr2-216013315-C-T) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_018000.3(MREG):c.13G>A(p.Asp5Asn) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000143 in 1,395,358 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 31)

Exomes 𝑓: 0.0000014 ( 0 hom. )

Consequence

MREG
NM_018000.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.809

Variant links:

Genes affected

MREG (HGNC:25478): (melanoregulin) Predicted to enable phosphatidylinositol binding activity. Predicted to be involved in melanocyte differentiation; melanosome transport; and phagosome maturation. Predicted to act upstream of or within developmental pigmentation. Predicted to be located in late endosome membrane and melanosome membrane. Predicted to be intrinsic component of organelle membrane. Predicted to be part of protein-containing complex. Predicted to be active in melanosome. [provided by Alliance of Genome Resources, Apr 2022]

MREG links:

PECR (HGNC:18281): (peroxisomal trans-2-enoyl-CoA reductase) Enables signaling receptor binding activity and trans-2-enoyl-CoA reductase (NADPH) activity. Involved in phytol metabolic process. Located in peroxisome. [provided by Alliance of Genome Resources, Apr 2022]

PECR links:

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ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.046308815).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MREG	NM_018000.3 link	c.13G>A	p.Asp5Asn	missense_variant	Exon 1 of 5	ENST00000263268.11	NP_060470.2	Q8N565-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MREG	ENST00000263268.11 link	c.13G>A	p.Asp5Asn	missense_variant	Exon 1 of 5	2	NM_018000.3	ENSP00000263268.6		Q8N565-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.00000694

AC:

AN:

144176

Hom.:

AF XY:

0.00

AC XY:

AN XY:

77470

show subpopulations

Gnomad AFR exome

AF:

0.000145

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS 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:

0.00000143

AC:

AN:

1395358

Hom.:

Cov.:

AF XY:

0.00000145

AC XY:

AN XY:

688338

show subpopulations

Gnomad4 AFR exome

AF:

0.0000639

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

Bravo

AF:

0.0000189

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Oct 29, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.13G>A (p.D5N) alteration is located in exon 1 (coding exon 1) of the MREG gene. This alteration results from a G to A substitution at nucleotide position 13, causing the aspartic acid (D) at amino acid position 5 to be replaced by an asparagine (N). 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

Benign

0.18

BayesDel_addAF

Benign

-0.47

BayesDel_noAF

Benign

-0.66

CADD

Benign

DANN

Uncertain

0.98

DEOGEN2

Benign

0.22

T;T

Eigen

Benign

-0.64

Eigen_PC

Benign

-0.55

FATHMM_MKL

Benign

0.18

LIST_S2

Benign

0.67

T;.

M_CAP

Benign

0.010

MetaRNN

Benign

0.046

T;T

MetaSVM

Benign

-1.1

MutationAssessor

Benign

1.0

L;L

PrimateAI

Uncertain

0.60

PROVEAN

Benign

-0.99

.;N

REVEL

Benign

0.0070

Sift

Benign

0.43

.;T

Sift4G

Benign

0.60

T;T

Polyphen

0.062

B;B

Vest4

0.037

MutPred

0.26

Gain of MoRF binding (P = 0.0235);Gain of MoRF binding (P = 0.0235);

MVP

0.085

MPC

0.10

ClinPred

0.052

GERP RS

2.1

Varity_R

0.058

gMVP

0.29

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

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