rs387907334

Variant names:

• chr3-33120433-T-G
• rs387907334
• NM_006371.5:c.561T>G
• CRTAP p.Tyr187*

Variant summary

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

The NM_006371.5(CRTAP):​c.561T>G​(p.Tyr187*) variant causes a stop gained change involving the alteration of a non-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 (no stars). Variant results in nonsense mediated mRNA decay.

• Frequency: Genomes: not found (cov: 33)
• Consequence: CRTAP NM_006371.5 stop_gained
• Clinical Significance: Pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 0.944
• Publications: 2 publications found

Genes affected

CRTAP (HGNC:2379): (cartilage associated protein) The protein encoded by this gene is similar to the chicken and mouse CRTAP genes. The encoded protein is a scaffolding protein that may influence the activity of at least one member of the cytohesin/ARNO family in response to specific cellular stimuli. Defects in this gene are associated with osteogenesis imperfecta, a connective tissue disorder characterized by bone fragility and low bone mass. [provided by RefSeq, Jul 2008]

CRTAP Gene-Disease associations (from GenCC):

• osteogenesis imperfecta type 7

  Inheritance: AR Classification: STRONG Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae)
• osteogenesis imperfecta type 2

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• osteogenesis imperfecta type 3

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• osteogenesis imperfecta type 4

  Inheritance: AD 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 3-33120433-T-G is Pathogenic according to our data. Variant chr3-33120433-T-G is described in ClinVar as Pathogenic. ClinVar VariationId is 41923.Status of the report is no_assertion_criteria_provided, 0 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_006371.5. 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
	CRTAP	NM_006371.5	MANE Select	c.561T>G	p.Tyr187*	stop_gained	Exon 2 of 7	NP_006362.1	O75718
	CRTAP	NM_001393363.1		c.561T>G	p.Tyr187*	stop_gained	Exon 2 of 6	NP_001380292.1
	CRTAP	NM_001393364.1		c.561T>G	p.Tyr187*	stop_gained	Exon 2 of 6	NP_001380293.1	C9JP16

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CRTAP	ENST00000320954.11	TSL:1 MANE Select	c.561T>G	p.Tyr187*	stop_gained	Exon 2 of 7	ENSP00000323696.5	O75718
	CRTAP	ENST00000946650.1		c.561T>G	p.Tyr187*	stop_gained	Exon 2 of 7	ENSP00000616709.1
	CRTAP	ENST00000946648.1		c.561T>G	p.Tyr187*	stop_gained	Exon 2 of 7	ENSP00000616707.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 33

Alfa AF: 0.00 Hom.: 0

ClinVar

ClinVar submissions

Significance: Pathogenic

Revision: no assertion criteria provided

Pathogenic	VUS	Benign	Condition
1	-	-	Osteogenesis imperfecta type 7 (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.63	D
BayesDel_noAF	Pathogenic	0.60
CADD	Pathogenic	38
DANN	Uncertain	1.0
Eigen	Uncertain	0.46
Eigen_PC	Uncertain	0.28
FATHMM_MKL	Uncertain	0.91	D
PhyloP100		0.94
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Mutation Taster		=4/196	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

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Other links and lift over

dbSNP: rs387907334;

hg19: chr3-33161925;