rs781893396

Variant names:

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 2P and 5B. PM1BS1_SupportingBS2

The NM_000116.5(TAFAZZIN):c.606G>C(p.Glu202Asp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000209 in 1,098,239 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 9 hemizygotes in GnomAD. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 23)

Exomes 𝑓: 0.000021 ( 0 hom. 9 hem. )

Consequence

TAFAZZIN
NM_000116.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 1.95

Publications

1 publications found

Variant links:

Genes affected

TAFAZZIN (HGNC:11577): (tafazzin, phospholipid-lysophospholipid transacylase) This gene encodes a protein that is expressed at high levels in cardiac and skeletal muscle. Mutations in this gene have been associated with a number of clinical disorders including Barth syndrome, dilated cardiomyopathy (DCM), hypertrophic DCM, endocardial fibroelastosis, and left ventricular noncompaction (LVNC). Multiple transcript variants encoding different isoforms have been described. A long form and a short form of each of these isoforms is produced; the short form lacks a hydrophobic leader sequence and may exist as a cytoplasmic protein rather than being membrane-bound. Other alternatively spliced transcripts have been described but the full-length nature of all these transcripts is not known. [provided by RefSeq, Jul 2008]

TAFAZZIN Gene-Disease associations (from GenCC):

Barth syndrome
Inheritance: XL Classification: DEFINITIVE, STRONG Submitted by: ClinGen, Labcorp Genetics (formerly Invitae), G2P

TAFAZZIN links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

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

PM1

In a topological_domain Mitochondrial intermembrane (size 226) in uniprot entity TAZ_HUMAN there are 23 pathogenic changes around while only 5 benign (82%) in NM_000116.5

BS1

Variant frequency is greater than expected in population sas. GnomAdExome4 allele frequency = 0.0000209 (23/1098239) while in subpopulation SAS AF = 0.000425 (23/54147). AF 95% confidence interval is 0.00029. There are 0 homozygotes in GnomAdExome4. There are 9 alleles in the male GnomAdExome4 subpopulation. Median coverage is 31. This position passed quality control check. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

BS2

High Hemizygotes in GnomAdExome4 at 9 XL gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TAFAZZIN	NM_000116.5 link	c.606G>C	p.Glu202Asp	missense_variant	Exon 8 of 11	ENST00000601016.6	NP_000107.1	Q16635-1A0A0S2Z4K0

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TAFAZZIN	ENST00000601016.6 link	c.606G>C	p.Glu202Asp	missense_variant	Exon 8 of 11	1	NM_000116.5	ENSP00000469981.1		Q16635-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD2 exomes

AF:

0.0000218

AC:

AN:

183505

AF XY:

0.0000294

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

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:

0.0000209

AC:

AN:

1098239

Hom.:

Cov.:

AF XY:

0.0000248

AC XY:

AN XY:

363601

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

26402

American (AMR)

AF:

0.00

AC:

AN:

35204

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

19386

East Asian (EAS)

AF:

0.00

AC:

AN:

30206

South Asian (SAS)

AF:

0.000425

AC:

AN:

54147

European-Finnish (FIN)

AF:

0.00

AC:

AN:

40533

Middle Eastern (MID)

AF:

0.00

AC:

AN:

4133

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

842133

Other (OTH)

AF:

0.00

AC:

AN:

46095

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.436

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

Cov.:

ExAC

AF:

0.0000247

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

3-Methylglutaconic aciduria type 2

Uncertain:1

Jul 21, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change replaces glutamic acid, which is acidic and polar, with aspartic acid, which is acidic and polar, at codon 202 of the TAZ protein (p.Glu202Asp). This variant is present in population databases (rs781893396, gnomAD 0.02%). This variant has not been reported in the literature in individuals affected with TAZ-related conditions. ClinVar contains an entry for this variant (Variation ID: 580242). Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Tolerated"; PolyPhen-2: "Possibly Damaging"; Align-GVGD: "Class C0"). 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

Pathogenic

0.72

BayesDel_addAF

Benign

-0.00039

BayesDel_noAF

Uncertain

0.050

CADD

Benign

(source)

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.79

.;.;.;.;D;.;D

FATHMM_MKL

Uncertain

0.85

LIST_S2

Uncertain

0.91

D;D;.;D;D;T;D

M_CAP

Pathogenic

0.80

MetaRNN

Uncertain

0.60

D;D;D;D;D;D;D

MetaSVM

Pathogenic

0.91

MutationAssessor

Uncertain

2.0

.;.;.;.;M;.;.

PhyloP100

1.9

PrimateAI

Uncertain

0.57

PROVEAN

Benign

-1.7

.;.;.;.;.;N;N

REVEL

Pathogenic

0.67

Sift

Benign

0.18

.;.;.;.;.;T;T

Sift4G

Benign

0.40

T;T;T;T;T;T;T

Polyphen

1.0

D;P;.;P;P;.;.

Vest4

0.82

MutPred

0.71

.;.;.;.;Gain of MoRF binding (P = 0.0954);.;.;

MVP

0.98

ClinPred

0.45

GERP RS

3.5

PromoterAI

-0.0095

Neutral

(source)

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.44

gMVP

0.96

Mutation Taster

=73/27

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

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over