chrX-154420709-C-G

Variant names:

• chrX-154420709-C-G
• rs372689133
• NM_000116.5:c.751C>G

Variant summary

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

The NM_000116.5(TAFAZZIN):​c.751C>G​(p.Arg251Gly) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. 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. R251W) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 23)
• Consequence: TAFAZZIN NM_000116.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.56
• Publications: 8 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: Uncertain_significance. The variant received 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

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.751C>G	p.Arg251Gly	missense	Exon 10 of 11	NP_000107.1	Q16635-1
	TAFAZZIN	NM_001440856.1		c.805C>G	p.Arg269Gly	missense	Exon 10 of 11	NP_001427785.1
	TAFAZZIN	NM_001303465.2		c.763C>G	p.Arg255Gly	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.751C>G	p.Arg251Gly	missense	Exon 10 of 11	ENSP00000469981.1	Q16635-1
	TAFAZZIN	ENST00000475699.6	TSL:1	c.715C>G	p.Arg239Gly	missense	Exon 9 of 10	ENSP00000419854.3	A0A499FJ53
	TAFAZZIN	ENST00000369776.8	TSL:1	c.661C>G	p.Arg221Gly	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: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	3-Methylglutaconic aciduria type 2 (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.15
BayesDel_addAF	Uncertain	0.15	D
BayesDel_noAF	Uncertain	-0.020
CADD	Uncertain	24
DANN	Uncertain	0.99
DEOGEN2	Benign	0.19	T
FATHMM_MKL	Uncertain	0.80	D
LIST_S2	Uncertain	0.92	D
M_CAP	Pathogenic	0.75	D
MetaRNN	Uncertain	0.43	T
MetaSVM	Pathogenic	0.82	D
MutationAssessor	Benign	1.8	L
PhyloP100		1.6
PrimateAI	Benign	0.45	T
PROVEAN	Uncertain	-2.6	D
REVEL	Uncertain	0.46
Sift	Benign	0.21	T
Sift4G	Benign	0.26	T
Polyphen		0.082	B
Vest4		0.44
MutPred		0.39		Gain of catalytic residue at P247 (P = 0.0813)
MVP		0.92
ClinPred		0.60	D
GERP RS		4.8
PromoterAI		-0.082	Neutral
Varity_R		0.20
gMVP		0.84
Mutation Taster		=86/14	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		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: rs372689133; hg19: chrX-153649048; COSMIC: COSV54796296; COSMIC: COSV54796296;