Genetic Variant NM_001142308.3:c.4923G>T (chr10-19450384-G-T) – ACMG Classification: Likely_benign (-3 pts)

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 2P and 5B. PM2BP4_StrongBP7

The NM_001142308.3(MALRD1):c.4923G>T(p.Leu1641Leu) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000215 in 1,397,954 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. Synonymous variant affecting the same amino acid position (i.e. L1641L) has been classified as Benign.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000021 ( 0 hom. )

Consequence

MALRD1
NM_001142308.3 synonymous

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: -1.17

Publications

0 publications found

Variant links:

Genes affected

MALRD1 (HGNC:24331): (MAM and LDL receptor class A domain containing 1) This gene encodes a conserved protein that features multiple MAM (meprin-A5-protein tyrosine phosphatase mu) and LDLR A2 (low density lipoprotein receptor A2) domains. Expression of this gene is enriched in the small intestine and is upregulated during differentiation of a human cell line that exhibits properties of intestinal epithelial cells. The encoded protein has been shown to modulate production of FGF19 in a human intestinal cell line and may regulate bile acid metabolism in the liver. A synergistic interaction between an allele of this gene and the APOE E4 allele is associated with an elevated risk of Alzheimer's disease in human patients. [provided by RefSeq, Jul 2017]

MALRD1 links:

LOC102724082 (HGNC:):

LOC102724082 links:

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ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -3 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.7).

BP7

Synonymous conserved (PhyloP=-1.17 with no splicing effect.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MALRD1	NM_001142308.3 link	c.4923G>T	p.Leu1641Leu	synonymous_variant	Exon 29 of 40	ENST00000454679.7	NP_001135780.2	Q5VYJ5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MALRD1	ENST00000454679.7 link	c.4923G>T	p.Leu1641Leu	synonymous_variant	Exon 29 of 40	1	NM_001142308.3	ENSP00000412763.3		Q5VYJ5
MALRD1	ENST00000377266.7 link	c.2953-38576G>T		intron_variant	Intron 15 of 24	5		ENSP00000366477.3		U5GXS0

Frequencies

GnomAD3 genomes

Cov.:

GnomAD2 exomes

AF:

0.00000668

AC:

AN:

149662

AF XY:

0.0000124

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000407

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:

0.00000215

AC:

AN:

1397954

Hom.:

Cov.:

AF XY:

0.00000435

AC XY:

AN XY:

689480

show subpopulations

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR)

AF:

0.00

AC:

AN:

31590

American (AMR)

AF:

0.0000840

AC:

AN:

35706

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25176

East Asian (EAS)

AF:

0.00

AC:

AN:

35720

South Asian (SAS)

AF:

0.00

AC:

AN:

79216

European-Finnish (FIN)

AF:

0.00

AC:

AN:

48182

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5466

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1078906

Other (OTH)

AF:

0.00

AC:

AN:

57992

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0.001100), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.375

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.00000378

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.70

CADD

Benign

0.32

(source)

DANN

Benign

0.51

PhyloP100

-1.2

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

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NM_001142308.3:c.4923G>T

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over