1-3186163-C-T

Position:

chr1-3186163-C-T

Variant summary

Our verdict is Likely benign. Variant got -6 ACMG points: 0P and 6B. BP4_ModerateBS2

The NM_022114.4(PRDM16):c.76C>T(p.Arg26Trp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000515 in 1,612,692 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 (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R26Q) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000059 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000051 ( 0 hom. )

Consequence

PRDM16
NM_022114.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:4

Conservation

PhyloP100: 2.60

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 links:

PRDM16 (HGNC:):

PRDM16 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -6 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.14894718).

BS2

High AC in GnomAd4 at 9 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
PRDM16	NM_022114.4 linkuse as main transcript	c.76C>T	p.Arg26Trp	missense_variant	2/17	ENST00000270722.10	NP_071397.3	Q9HAZ2-1
PRDM16	NM_199454.3 linkuse as main transcript	c.76C>T	p.Arg26Trp	missense_variant	2/17		NP_955533.2	Q9HAZ2-2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
PRDM16	ENST00000270722.10 linkuse as main transcript	c.76C>T	p.Arg26Trp	missense_variant	2/17	1	NM_022114.4	ENSP00000270722.5		Q9HAZ2-1

Frequencies

GnomAD3 genomes

AF:

0.0000591

AC:

AN:

152178

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000483

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000262

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:

0.0000294

Gnomad OTH

AF:

0.000478

GnomAD3 exomes

AF:

0.0000933

AC:

AN:

246636

Hom.:

AF XY:

0.0000891

AC XY:

AN XY:

134678

show subpopulations

Gnomad AFR exome

AF:

0.0000660

Gnomad AMR exome

AF:

0.000319

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000112

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000451

Gnomad OTH exome

AF:

0.000666

GnomAD4 exome

AF:

0.0000507

AC:

AN:

1460514

Hom.:

Cov.:

AF XY:

0.0000482

AC XY:

AN XY:

726558

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.000514

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.000227

Gnomad4 SAS exome

AF:

0.0000116

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000279

Gnomad4 OTH exome

AF:

0.0000994

GnomAD4 genome

AF:

0.0000591

AC:

AN:

152178

Hom.:

Cov.:

AF XY:

0.0000942

AC XY:

AN XY:

74340

show subpopulations

Gnomad4 AFR

AF:

0.0000483

Gnomad4 AMR

AF:

0.000262

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000294

Gnomad4 OTH

AF:

0.000478

Alfa

AF:

0.0000675

Hom.:

Bravo

AF:

0.000106

ExAC

AF:

0.0000413

AC:

EpiCase

AF:

0.00

EpiControl

AF:

0.0000593

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:4

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Inborn genetic diseases

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

May 03, 2023

The c.76C>T (p.R26W) alteration is located in exon 2 (coding exon 2) of the PRDM16 gene. This alteration results from a C to T substitution at nucleotide position 76, causing the arginine (R) at amino acid position 26 to be replaced by a tryptophan (W). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

GeneDx

Feb 08, 2022

Has not been previously published as pathogenic or benign to our knowledge; In silico analysis supports that this missense variant does not alter protein structure/function -

Primary dilated cardiomyopathy

Uncertain:1

Uncertain significance, criteria provided, single submitter

research

Genetics and Genomics Program, Sidra Medicine

- -

Left ventricular noncompaction 8

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Nov 24, 2023

This sequence change replaces arginine, which is basic and polar, with tryptophan, which is neutral and slightly polar, at codon 26 of the PRDM16 protein (p.Arg26Trp). This variant is present in population databases (rs769704263, gnomAD 0.04%). This variant has not been reported in the literature in individuals affected with PRDM16-related conditions. ClinVar contains an entry for this variant (Variation ID: 474439). An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant is likely to be disruptive. 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. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.10

BayesDel_addAF

Benign

-0.43

BayesDel_noAF

Benign

-0.54

CADD

Benign

DANN

Uncertain

1.0

DEOGEN2

Benign

0.021

T;.;.;T

Eigen

Uncertain

0.19

Eigen_PC

Uncertain

0.26

FATHMM_MKL

Uncertain

0.91

LIST_S2

Uncertain

0.95

D;D;D;D

M_CAP

Benign

0.028

MetaRNN

Benign

0.15

T;T;T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

0.0

.;N;.;N

PrimateAI

Benign

0.35

PROVEAN

Benign

-1.6

N;N;N;N

REVEL

Benign

0.059

Sift

Uncertain

0.0040

D;D;D;D

Sift4G

Benign

0.18

T;T;T;T

Polyphen

0.99, 0.96

.;D;.;D

Vest4

0.34

MutPred

0.27

Loss of disorder (P = 0.0849);Loss of disorder (P = 0.0849);Loss of disorder (P = 0.0849);Loss of disorder (P = 0.0849);

MVP

0.19

MPC

0.84

ClinPred

0.12

GERP RS

5.1

Varity_R

0.076

gMVP

0.39

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