X-154411912-C-G

Variant names:

• chrX-154411912-C-G
• rs782123597
• NM_000116.5:c.69C>G

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 2P and 5B. PM2 BP4_Moderate BP6_Moderate BP7

The NM_001440856.1(TAFAZZIN):​c.69C>G​(p.Val23Val) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★). Synonymous variant affecting the same amino acid position (i.e. V23V) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 23)
• Consequence: TAFAZZIN NM_001440856.1 synonymous
• Clinical Significance: Likely benign criteria provided, single submitter B:1
• Conservation: PhyloP100: 1.36
• Publications: 0 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]

DNASE1L1 (HGNC:2957): (deoxyribonuclease 1 like 1) This gene encodes a deoxyribonuclease protein that shows high sequence similarity to DNase I. The encoded protein is localized to the endoplasmic reticulum and modified by N-linked glycosylation. Alternate transcriptional splice variants encoding the same protein have been observed. [provided by RefSeq, Jan 2015]

ACMG classification

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

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.39).
• BP6: Variant X-154411912-C-G is Benign according to our data. Variant chrX-154411912-C-G is described in ClinVar as Likely_benign. ClinVar VariationId is 2030701.Status of the report is criteria_provided_single_submitter, 1 stars.
• BP7: Synonymous conserved (PhyloP=1.36 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001440856.1. 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.69C>G	p.Val23Val	synonymous	Exon 1 of 11	NP_000107.1
	TAFAZZIN	NM_001440856.1		c.69C>G	p.Val23Val	synonymous	Exon 1 of 11	NP_001427785.1
	TAFAZZIN	NM_001303465.2		c.69C>G	p.Val23Val	synonymous	Exon 1 of 10	NP_001290394.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TAFAZZIN	ENST00000601016.6	TSL:1 MANE Select	c.69C>G	p.Val23Val	synonymous	Exon 1 of 11	ENSP00000469981.1
	TAFAZZIN	ENST00000475699.6	TSL:1	c.69C>G	p.Val23Val	synonymous	Exon 1 of 10	ENSP00000419854.3
	TAFAZZIN	ENST00000369776.8	TSL:1	c.69C>G	p.Val23Val	synonymous	Exon 1 of 7	ENSP00000358791.4

Frequencies

GnomAD3 genomes Cov.: 23

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 23

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000378

ClinVar

ClinVar submissions as Germline

Significance: Likely benign

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
BayesDel_noAF	Benign	-0.39
CADD	Benign	15
DANN	Benign	0.92
PhyloP100		1.4
PromoterAI		-0.12	Neutral

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.050		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: rs782123597; hg19: chrX-153640249;