NM_001159773.2:c.374G>A

Variant names:

• chr17-78997249-C-T
• rs267606702
• NM_001159773.2:c.374G>A

Variant summary

Our verdict is Pathogenic. The variant received 11 ACMG points: 11P and 0B. PVS1 PM2 PP5

The NM_001159773.2(CANT1):​c.374G>A​(p.Trp125*) variant causes a stop gained 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 Conflicting classifications of pathogenicity (no stars). Variant results in nonsense mediated mRNA decay.

• Frequency: Genomes: not found (cov: 33)
• Consequence: CANT1 NM_001159773.2 stop_gained
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications P:2 U:1
• Conservation: PhyloP100: 7.42
• Publications: 2 publications found

Genes affected

CANT1 (HGNC:19721): (calcium activated nucleotidase 1) This protein encoded by this gene belongs to the apyrase family. It functions as a calcium-dependent nucleotidase with a preference for UDP. Mutations in this gene are associated with Desbuquois dysplasia with hand anomalies. Alternatively spliced transcript variants have been noted for this gene.[provided by RefSeq, Mar 2010]

CANT1 Gene-Disease associations (from GenCC):

• Desbuquois dysplasia 1

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), G2P
• Desbuquois dysplasia

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Pathogenic. The variant received 11 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 17-78997249-C-T is Pathogenic according to our data. Variant chr17-78997249-C-T is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 282.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001159773.2. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CANT1	NM_001159773.2	MANE Select	c.374G>A	p.Trp125*	stop_gained	Exon 3 of 5	NP_001153245.1
	CANT1	NM_001159772.2		c.374G>A	p.Trp125*	stop_gained	Exon 4 of 6	NP_001153244.1
	CANT1	NM_138793.4		c.374G>A	p.Trp125*	stop_gained	Exon 2 of 4	NP_620148.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CANT1	ENST00000392446.10	TSL:1 MANE Select	c.374G>A	p.Trp125*	stop_gained	Exon 3 of 5	ENSP00000376241.4
	CANT1	ENST00000591773.5	TSL:1	c.374G>A	p.Trp125*	stop_gained	Exon 4 of 6	ENSP00000467437.1
	CANT1	ENST00000302345.6	TSL:2	c.374G>A	p.Trp125*	stop_gained	Exon 2 of 4	ENSP00000307674.2

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 33

Alfa AF: 0.00 Hom.: 0

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Pathogenic:2 Uncertain:1

Revision: criteria provided, conflicting classifications

Submissions by phenotype

Desbuquois dysplasia 1 Pathogenic:1 Uncertain:1

Nov 01, 2009

OMIM

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

Mar 25, 2024

Genomic Medicine Center of Excellence, King Faisal Specialist Hospital and Research Centre

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Desbuquois dysplasia 1;C4540251:Epiphyseal dysplasia, multiple, 7 Pathogenic:1

May 20, 2024

Fulgent Genetics, Fulgent Genetics

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.62	D
BayesDel_noAF	Pathogenic	0.65
CADD	Pathogenic	39
DANN	Uncertain	1.0
Eigen	Pathogenic	0.92
Eigen_PC	Pathogenic	0.80
FATHMM_MKL	Pathogenic	0.99	D
PhyloP100		7.4
Vest4		0.37
GERP RS		5.3
Mutation Taster		=0/200	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: rs267606702; hg19: chr17-76993331;