X-139956478-T-C

Variant names:

• chrX-139956478-T-C
• rs1199042068
• NM_001013403.3:c.504A>G

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 2P and 5B. PM2 BP4_Strong BP7

The NM_001013403.3(CXorf66):​c.504A>G​(p.Ser168Ser) 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. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. S168S) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 23)
  • Exomes 𝑓: 9.1e-7 (0 hom. 1 hem.)
  • Failed GnomAD Quality Control
• Consequence: CXorf66 NM_001013403.3 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.120
• Publications: 0 publications found

Genes affected

CXorf66 (HGNC:33743): (chromosome X open reading frame 66) The protein encoded by this gene is predicted to be a type I membrane protein, however, its exact function is not known. [provided by RefSeq, Sep 2009]

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=-0.92).
• BP7: Synonymous conserved (PhyloP=0.12 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001013403.3. 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
	CXorf66	NM_001013403.3	MANE Select	c.504A>G	p.Ser168Ser	synonymous	Exon 3 of 3	NP_001013421.1	Q5JRM2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CXorf66	ENST00000370540.2	TSL:1 MANE Select	c.504A>G	p.Ser168Ser	synonymous	Exon 3 of 3	ENSP00000359571.1	Q5JRM2

Frequencies

GnomAD3 genomes Cov.: 23

GnomAD2 exomes AF: 0.00000545 AC: 1 AN: 183383 AF XY: 0.0000147

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 Data not reliable, filtered out with message: AS_VQSR AF: 9.11e-7 AC: 1 AN: 1098120 Hom.: 0 Cov.: 31 AF XY: 0.00000275 AC XY: 1 AN XY: 363474

African (AFR) AF: 0.00 AC: 0 AN: 26403

American (AMR) AF: 0.00 AC: 0 AN: 35207

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 19385

East Asian (EAS) AF: 0.00 AC: 0 AN: 30204

South Asian (SAS) AF: 0.0000185 AC: 1 AN: 54142

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 40534

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 4137

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 842013

Other (OTH) AF: 0.00 AC: 0 AN: 46095

GnomAD4 genome Cov.: 23

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.92
CADD	Benign	1.7
DANN	Benign	0.52
PhyloP100		0.12

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: rs1199042068; hg19: chrX-139038637;