chr3-33114097-G-C

Variant names:

Variant summary

Our verdict is Likely benign. The variant received -4 ACMG points: 0P and 4B. BP4_Strong

The NM_006371.5(CRTAP):c.20G>C(p.Gly7Ala) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000136 in 1,467,870 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. G7R) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 34)

Exomes 𝑓: 0.000014 ( 0 hom. )

Consequence

CRTAP
NM_006371.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:2

Conservation

PhyloP100: 0.841

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: 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

CRTAP links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -4 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.062467843).

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

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
CRTAP	NM_006371.5	MANE Select	c.20G>C	p.Gly7Ala	missense	Exon 1 of 7	NP_006362.1	O75718
CRTAP	NM_001393363.1		c.20G>C	p.Gly7Ala	missense	Exon 1 of 6	NP_001380292.1
CRTAP	NM_001393364.1		c.20G>C	p.Gly7Ala	missense	Exon 1 of 6	NP_001380293.1	C9JP16

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
CRTAP	ENST00000320954.11	TSL:1 MANE Select	c.20G>C	p.Gly7Ala	missense	Exon 1 of 7	ENSP00000323696.5	O75718
CRTAP	ENST00000946650.1		c.20G>C	p.Gly7Ala	missense	Exon 1 of 7	ENSP00000616709.1
CRTAP	ENST00000946648.1		c.20G>C	p.Gly7Ala	missense	Exon 1 of 7	ENSP00000616707.1

Frequencies

GnomAD3 genomes

AF:

0.00000658

AC:

AN:

151932

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000656

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:

0.00

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000128

AC:

AN:

78364

AF XY:

0.0000219

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:

0.0000321

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000144

AC:

AN:

1315938

Hom.:

Cov.:

AF XY:

0.0000169

AC XY:

AN XY:

649764

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

26474

American (AMR)

AF:

0.00

AC:

AN:

24036

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

22752

East Asian (EAS)

AF:

0.00

AC:

AN:

29096

South Asian (SAS)

AF:

0.00

AC:

AN:

71638

European-Finnish (FIN)

AF:

0.00

AC:

AN:

33180

Middle Eastern (MID)

AF:

0.00

AC:

AN:

4604

European-Non Finnish (NFE)

AF:

0.0000171

AC:

AN:

1049706

Other (OTH)

AF:

0.0000184

AC:

AN:

54452

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.464

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:

0.00000658

AC:

AN:

151932

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74214

show subpopulations

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5.

African (AFR)

AF:

0.00

AC:

AN:

41400

American (AMR)

AF:

0.0000656

AC:

AN:

15246

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5158

South Asian (SAS)

AF:

0.00

AC:

AN:

4830

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10580

Middle Eastern (MID)

AF:

0.00

AC:

AN:

314

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

67936

Other (OTH)

AF:

0.00

AC:

AN:

2088

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5. (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.375

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:

0.00

Hom.:

Bravo

AF:

0.0000227

ClinVar

ClinVar submissions

Significance:Uncertain significance

Revision:criteria provided, multiple submitters, no conflicts

View on ClinVar

Pathogenic

VUS

Benign

Condition

not provided (1)

Osteogenesis imperfecta type 7 (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.061

BayesDel_addAF

Benign

-0.25

BayesDel_noAF

Benign

-0.60

CADD

Benign

5.3

(source)

DANN

Benign

0.32

DEOGEN2

Benign

0.082

Eigen

Benign

-1.1

Eigen_PC

Benign

-1.1

FATHMM_MKL

Benign

0.026

LIST_S2

Benign

0.58

M_CAP

Benign

0.038

MetaRNN

Benign

0.062

MetaSVM

Benign

-1.0

MutationAssessor

Benign

-0.34

PhyloP100

0.84

PrimateAI

Uncertain

0.77

PROVEAN

Benign

0.29

REVEL

Benign

0.034

Sift

Benign

0.86

Sift4G

Benign

1.0

Polyphen

0.0

Vest4

0.13

MutPred

0.21

Loss of glycosylation at P3 (P = 0.0312)

MVP

0.49

MPC

0.12

ClinPred

0.0060

GERP RS

1.9

PromoterAI

0.13

Neutral

(source)

RBP_binding_hub_radar

0.92

RBP_regulation_power_radar

3.0

Varity_R

0.044

gMVP

0.44

Mutation Taster

=89/11

polymorphism

(source)

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

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over