1-3412703-G-T

Variant names:

• chr1-3412703-G-T
• rs114204766
• NM_022114.4:c.2506G>T

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_022114.4(PRDM16):​c.2506G>T​(p.Gly836Cys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000744 in 1,343,950 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/22 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 variant affecting the same amino acid position, but resulting in a different missense (i.e. G836S) has been classified as Benign.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 7.4e-7 (0 hom.)
• Consequence: PRDM16 NM_022114.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.882
• Publications: 0 publications found

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

ACMG classification

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=0.20728117).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_022114.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PRDM16	NM_022114.4	MANE Select	c.2506G>T	p.Gly836Cys	missense	Exon 9 of 17	NP_071397.3
	PRDM16	NM_199454.3		c.2506G>T	p.Gly836Cys	missense	Exon 9 of 17	NP_955533.2

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PRDM16	ENST00000270722.10	TSL:1 MANE Select	c.2506G>T	p.Gly836Cys	missense	Exon 9 of 17	ENSP00000270722.5
	PRDM16	ENST00000378391.6	TSL:1	c.2506G>T	p.Gly836Cys	missense	Exon 9 of 17	ENSP00000367643.2
	PRDM16	ENST00000512462.5	TSL:1	n.2284G>T		non_coding_transcript_exon	Exon 8 of 16

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 7.44e-7 AC: 1 AN: 1343950 Hom.: 0 Cov.: 35 AF XY: 0.00000152 AC XY: 1 AN XY: 658034

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

African (AFR) AF: 0.00 AC: 0 AN: 29398

American (AMR) AF: 0.00 AC: 0 AN: 27282

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 21804

East Asian (EAS) AF: 0.00 AC: 0 AN: 34996

South Asian (SAS) AF: 0.00 AC: 0 AN: 71194

European-Finnish (FIN) AF: 0.0000229 AC: 1 AN: 43688

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5410

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1054764

Other (OTH) AF: 0.00 AC: 0 AN: 55414

⚠️ 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.

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.11
BayesDel_addAF	Benign	-0.24	T
BayesDel_noAF	Benign	-0.58
CADD	Benign	17
DANN	Uncertain	0.99
DEOGEN2	Benign	0.051	T
Eigen	Benign	-0.51
Eigen_PC	Benign	-0.69
FATHMM_MKL	Benign	0.080	N
LIST_S2	Uncertain	0.86	D
M_CAP	Benign	0.043	D
MetaRNN	Benign	0.21	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	1.9	L
PhyloP100		0.88
PrimateAI	Uncertain	0.52	T
PROVEAN	Benign	-1.8	N
REVEL	Benign	0.054
Sift	Benign	0.12	T
Sift4G	Uncertain	0.0060	D
Polyphen		0.97	D
Vest4		0.33
MutPred		0.38		Loss of MoRF binding (P = 0.0967)
MVP		0.37
MPC		0.91
ClinPred		0.51	D
GERP RS		0.17
Varity_R		0.096
gMVP		0.51
Mutation Taster		=96/4	polymorphism

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

Other links and lift over

dbSNP: rs114204766; hg19: chr1-3329267;