chrX-154420676-G-C

Variant names:

• chrX-154420676-G-C
• rs387907218
• NM_000116.5:c.718G>C

Variant summary

Our verdict is Pathogenic. The variant received 16 ACMG points: 16P and 0B. PS1_Very_Strong PM2 PP3_Strong PP5_Moderate

The NM_000116.5(TAFAZZIN):​c.718G>C​(p.Gly240Arg) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (★). Another nucleotide change resulting in the same amino acid substitution has been previously reported as Likely pathogenic in ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. G240W) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 23)
• Consequence: TAFAZZIN NM_000116.5 missense
• Clinical Significance: Pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: 7.50
• Publications: 14 publications found

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, PanelApp Australia, G2P, Labcorp Genetics (formerly Invitae)

ACMG classification

Our verdict: Pathogenic. The variant received 16 ACMG points.

• PS1: Transcript NM_000116.5 (TAFAZZIN) is affected with MISSENSE_VARIANT having same AA change as one Pathogenic present in ClinVar.
• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.992
• PP5: Variant X-154420676-G-C is Pathogenic according to our data. Variant chrX-154420676-G-C is described in ClinVar as Pathogenic. ClinVar VariationId is 42266.Status of the report is criteria_provided_single_submitter, 1 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000116.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TAFAZZIN	NM_000116.5	MANE Select	c.718G>C	p.Gly240Arg	missense	Exon 10 of 11	NP_000107.1	Q16635-1
	TAFAZZIN	NM_001440856.1		c.772G>C	p.Gly258Arg	missense	Exon 10 of 11	NP_001427785.1
	TAFAZZIN	NM_001303465.2		c.730G>C	p.Gly244Arg	missense	Exon 9 of 10	NP_001290394.1	A6XNE1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TAFAZZIN	ENST00000601016.6	TSL:1 MANE Select	c.718G>C	p.Gly240Arg	missense	Exon 10 of 11	ENSP00000469981.1	Q16635-1
	TAFAZZIN	ENST00000475699.6	TSL:1	c.682G>C	p.Gly228Arg	missense	Exon 9 of 10	ENSP00000419854.3	A0A499FJ53
	TAFAZZIN	ENST00000369776.8	TSL:1	c.628G>C	p.Gly210Arg	missense	Exon 6 of 7	ENSP00000358791.4	F6Y2X3

Frequencies

GnomAD3 genomes Cov.: 23

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 23

ClinVar

ClinVar submissions

Significance: Pathogenic

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
1	-	-	Primary dilated cardiomyopathy (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.99
BayesDel_addAF	Pathogenic	0.63	D
BayesDel_noAF	Pathogenic	0.67
CADD	Pathogenic	28
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.73	D
FATHMM_MKL	Uncertain	0.96	D
LIST_S2	Uncertain	0.97	D
M_CAP	Pathogenic	0.97	D
MetaRNN	Pathogenic	0.99	D
MetaSVM	Pathogenic	1.0	D
MutationAssessor	Uncertain	2.7	M
PhyloP100		7.5
PrimateAI	Uncertain	0.79	T
PROVEAN	Pathogenic	-7.5	D
REVEL	Pathogenic	0.84
Sift	Pathogenic	0.0	D
Sift4G	Pathogenic	0.0	D
Polyphen		1.0	D
Vest4		0.92
MutPred		0.93		Gain of MoRF binding (P = 0.007)
MVP		1.0
ClinPred		1.0	D
GERP RS		3.0
PromoterAI		0.18	Neutral
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.89
gMVP		1.0
Mutation Taster		=0/100	disease causing (ClinVar)

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: rs387907218; hg19: chrX-153649015;