3-33114095-G-A

Variant names:

• chr3-33114095-G-A
• rs1333081449
• NM_006371.5:c.18G>A

Variant summary

Our verdict is Likely benign. Variant got -3 ACMG points: 2P and 5B. PM2 BP4_Strong BP7

The NM_006371.5(CRTAP):​c.18G>A​(p.Arg6Arg) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000152 in 1,312,510 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 34)
  • Exomes 𝑓: 0.0000015 (0 hom.)
• Consequence: CRTAP NM_006371.5 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.547

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]

ACMG classification

Verdict is Likely_benign. Variant got -3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.71).
• BP7: Synonymous conserved (PhyloP=0.547 with no splicing effect.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CRTAP	NM_006371.5	c.18G>A	p.Arg6Arg	synonymous_variant	Exon 1 of 7	ENST00000320954.11	NP_006362.1
CRTAP	NM_001393363.1	c.18G>A	p.Arg6Arg	synonymous_variant	Exon 1 of 6		NP_001380292.1
CRTAP	NM_001393364.1	c.18G>A	p.Arg6Arg	synonymous_variant	Exon 1 of 6		NP_001380293.1
CRTAP	NM_001393365.1	c.18G>A	p.Arg6Arg	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	c.18G>A	p.Arg6Arg	synonymous_variant	Exon 1 of 7	1	NM_006371.5	ENSP00000323696.5
CRTAP	ENST00000449224.1	c.18G>A	p.Arg6Arg	synonymous_variant	Exon 1 of 6	2		ENSP00000409997.1

Frequencies

GnomAD3 genomes Cov.: 34

GnomAD3 exomes AF: 0.0000267 AC: 2 AN: 74990 Hom.: 0 AF XY: 0.00 AC XY: 0 AN XY: 43820

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 SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000674

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000152 AC: 2 AN: 1312510 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 648042

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000191

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 34

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.71
CADD	Benign	7.7
DANN	Benign	0.86
RBP_binding_hub_radar		0.92
RBP_regulation_power_radar		2.6

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

LitVar

Other links and lift over

dbSNP: rs1333081449; hg19: chr3-33155587;