Genetic Variant PRDM16:p.Val220Leu (chr1-3396575-G-C) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_022114.4(PRDM16):c.658G>C(p.Val220Leu) variant causes a missense change. The variant allele was found at a frequency of 0.000000695 in 1,439,296 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/22 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another nucleotide change resulting in the same amino acid substitution has been previously reported as Uncertain significance in ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. V220M) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 6.9e-7 ( 0 hom. )

Consequence

PRDM16
NM_022114.4 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 3.70

Publications

0 publications found

Variant links:

Genes affected

PRDM16 (HGNC:14000): (PR/SET domain 16) The reciprocal translocation t(1;3)(p36;q21) occurs in a subset of myelodysplastic syndrome (MDS) and acute myeloid leukemia (AML). This gene is located near the 1p36.3 breakpoint and has been shown to be specifically expressed in the t(1:3)(p36,q21)-positive MDS/AML. The protein encoded by this gene is a zinc finger transcription factor and contains an N-terminal PR domain. The translocation results in the overexpression of a truncated version of this protein that lacks the PR domain, which may play an important role in the pathogenesis of MDS and AML. Alternatively spliced transcript variants encoding distinct isoforms have been reported. [provided by RefSeq, Jul 2008]

PRDM16 Gene-Disease associations (from GenCC):

left ventricular noncompaction 8
Inheritance: AD Classification: MODERATE, LIMITED Submitted by: Ambry Genetics, Illumina, Labcorp Genetics (formerly Invitae)
familial isolated dilated cardiomyopathy
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
left ventricular noncompaction
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
dilated cardiomyopathy
Inheritance: AD Classification: LIMITED Submitted by: ClinGen

PRDM16 links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.1850771).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PRDM16	NM_022114.4 link	c.658G>C	p.Val220Leu	missense_variant	Exon 5 of 17	ENST00000270722.10	NP_071397.3	Q9HAZ2-1
PRDM16	NM_199454.3 link	c.658G>C	p.Val220Leu	missense_variant	Exon 5 of 17		NP_955533.2	Q9HAZ2-2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PRDM16	ENST00000270722.10 link	c.658G>C	p.Val220Leu	missense_variant	Exon 5 of 17	1	NM_022114.4	ENSP00000270722.5		Q9HAZ2-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.95e-7

AC:

AN:

1439296

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

714886

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:

33170

American (AMR)

AF:

0.00

AC:

AN:

42456

Ashkenazi Jewish (ASJ)

AF:

0.0000391

AC:

AN:

25590

East Asian (EAS)

AF:

0.00

AC:

AN:

39188

South Asian (SAS)

AF:

0.00

AC:

AN:

82976

European-Finnish (FIN)

AF:

0.00

AC:

AN:

51880

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5296

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1099270

Other (OTH)

AF:

0.00

AC:

AN:

59470

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0), 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.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.11

BayesDel_addAF

Benign

-0.29

BayesDel_noAF

Benign

-0.65

CADD

Benign

(source)

DANN

Benign

0.94

DEOGEN2

Benign

0.0024

T;.;.;T;.

Eigen

Benign

-0.86

Eigen_PC

Benign

-0.77

FATHMM_MKL

Uncertain

0.92

LIST_S2

Benign

0.69

T;T;T;T;T

M_CAP

Benign

0.017

MetaRNN

Benign

0.19

T;T;T;T;T

MetaSVM

Benign

-0.92

MutationAssessor

Benign

1.6

.;L;.;L;.

PhyloP100

3.7

PrimateAI

Benign

0.41

PROVEAN

Benign

0.20

N;N;N;N;N

REVEL

Benign

0.11

Sift

Benign

0.088

T;T;T;T;T

Sift4G

Benign

0.21

T;T;T;T;T

Polyphen

0.029, 0.0070

.;B;.;B;.

Vest4

0.16

MutPred

0.60

.;Loss of helix (P = 0.079);.;Loss of helix (P = 0.079);.;

MVP

0.23

MPC

0.35

ClinPred

0.41

GERP RS

1.6

PromoterAI

0.0050

Neutral

(source)

Varity_R

0.036

gMVP

0.18

Mutation Taster

=94/6

polymorphism

(source)

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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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Computational scores

Splicing

Publications

Other links and lift over