Genetic Variant CRTAP:p.Leu44Leu (chr3-33114209-C-T) – ACMG Classification: Likely_benign (-5 pts)

Variant summary

Our verdict is Likely benign. The variant received -5 ACMG points: 0P and 5B. BP4_ModerateBP6_ModerateBP7

The NM_006371.5(CRTAP):c.132C>T(p.Leu44Leu) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000753 in 1,593,738 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★).

Frequency

Genomes: 𝑓 0.000033 ( 0 hom., cov: 34)

Exomes 𝑓: 0.0000049 ( 0 hom. )

Consequence

CRTAP
NM_006371.5 synonymous

Scores

Clinical Significance

Likely benign criteria provided, single submitter B:1

Conservation

PhyloP100: 0.328

Publications

1 publications found

Variant links:

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: Labcorp Genetics (formerly Invitae), Ambry Genetics
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

CRTAP links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -5 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.45).

BP6

Variant 3-33114209-C-T is Benign according to our data. Variant chr3-33114209-C-T is described in ClinVar as Likely_benign. ClinVar VariationId is 465807.Status of the report is criteria_provided_single_submitter, 1 stars.

BP7

Synonymous conserved (PhyloP=0.328 with no splicing effect.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein
CRTAP	NM_006371.5 link	c.132C>T	p.Leu44Leu	synonymous_variant	Exon 1 of 7	ENST00000320954.11	NP_006362.1
CRTAP	NM_001393363.1 link	c.132C>T	p.Leu44Leu	synonymous_variant	Exon 1 of 6		NP_001380292.1
CRTAP	NM_001393364.1 link	c.132C>T	p.Leu44Leu	synonymous_variant	Exon 1 of 6		NP_001380293.1
CRTAP	NM_001393365.1 link	c.132C>T	p.Leu44Leu	synonymous_variant	Exon 1 of 6		NP_001380294.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CRTAP	ENST00000320954.11 link	c.132C>T	p.Leu44Leu	synonymous_variant	Exon 1 of 7	1	NM_006371.5	ENSP00000323696.5
CRTAP	ENST00000449224.1 link	c.132C>T	p.Leu44Leu	synonymous_variant	Exon 1 of 6	2		ENSP00000409997.1

Frequencies

GnomAD3 genomes

AF:

0.0000329

AC:

AN:

152050

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000736

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000189

AC:

AN:

212164

AF XY:

0.0000254

show subpopulations

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:

0.0000314

Gnomad OTH exome

AF:

0.000186

GnomAD4 exome

AF:

0.00000486

AC:

AN:

1441688

Hom.:

Cov.:

AF XY:

0.00000418

AC XY:

AN XY:

717208

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

32382

American (AMR)

AF:

0.00

AC:

AN:

43978

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25794

East Asian (EAS)

AF:

0.00

AC:

AN:

39170

South Asian (SAS)

AF:

0.00

AC:

AN:

84638

European-Finnish (FIN)

AF:

0.00

AC:

AN:

41864

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5648

European-Non Finnish (NFE)

AF:

0.00000632

AC:

AN:

1108342

Other (OTH)

AF:

0.00

AC:

AN:

59872

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.482

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.0000329

AC:

AN:

152050

Hom.:

Cov.:

AF XY:

0.0000269

AC XY:

AN XY:

74282

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41420

American (AMR)

AF:

0.00

AC:

AN:

15270

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5172

South Asian (SAS)

AF:

0.00

AC:

AN:

4826

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10594

Middle Eastern (MID)

AF:

0.00

AC:

AN:

314

European-Non Finnish (NFE)

AF:

0.0000736

AC:

AN:

67980

Other (OTH)

AF:

0.00

AC:

AN:

2094

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.485

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.0000434

Hom.:

Bravo

AF:

0.0000302

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Osteogenesis imperfecta type 7

Benign:1

Feb 23, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.45

CADD

Benign

8.8

(source)

DANN

Benign

0.89

PhyloP100

0.33

PromoterAI

-0.052

Neutral

(source)

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

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

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over