Genetic Variant RAI1:p.Gln282_Gln291dup (chr17-17793779-C-CCAGCAGCAGCAGCAGCAGCAGCAGCAGCAG) – ACMG Classification: Likely_benign (-3 pts)

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 0P and 3B. BP3BP6_Moderate

The NM_030665.4(RAI1):c.843_872dupGCAGCAGCAGCAGCAGCAGCAGCAGCAGCA(p.Gln282_Gln291dup) variant causes a disruptive inframe insertion change involving the alteration of a non-conserved nucleotide. It is difficult to determine the true allele frequency of this variant because it is of type INS_BIG, and the frequency of such variant types in population databases may be underestimated and unreliable. Variant has been reported in ClinVar as Likely benign (★). Synonymous variant affecting the same amino acid position (i.e. Q291Q) has been classified as Likely benign.

Frequency

Genomes: not found (cov: 0)

Exomes 𝑓: 0.0000023 ( 0 hom. )

Failed GnomAD Quality Control

Consequence

RAI1
NM_030665.4 disruptive_inframe_insertion

Scores

Not classified

Clinical Significance

Likely benign criteria provided, single submitter B:1

Conservation

PhyloP100: 1.36

Publications

0 publications found

Variant links:

Genes affected

RAI1 (HGNC:9834): (retinoic acid induced 1) This gene is located within the Smith-Magenis syndrome region on chromosome 17. It is highly similar to its mouse counterpart and is expressed at high levels mainly in neuronal tissues. The protein encoded by this gene includes a polymorphic polyglutamine tract in the N-terminal domain. Expression of the mouse counterpart in neurons is induced by retinoic acid. This gene is associated with both the severity of the phenotype and the response to medication in schizophrenic patients. [provided by RefSeq, Jul 2008]

RAI1 Gene-Disease associations (from GenCC):

Smith-Magenis syndrome
Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, Ambry Genetics, ClinGen, Labcorp Genetics (formerly Invitae), G2P
Potocki-Lupski syndrome
Inheritance: AD Classification: MODERATE Submitted by: Ambry Genetics

RAI1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -3 ACMG points.

BP3

Nonframeshift variant in repetitive region in NM_030665.4

BP6

Variant 17-17793779-C-CCAGCAGCAGCAGCAGCAGCAGCAGCAGCAG is Benign according to our data. Variant chr17-17793779-C-CCAGCAGCAGCAGCAGCAGCAGCAGCAGCAG is described in ClinVar as Likely_benign. ClinVar VariationId is 1405281.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
RAI1	NM_030665.4 link	c.843_872dupGCAGCAGCAGCAGCAGCAGCAGCAGCAGCA	p.Gln282_Gln291dup	disruptive_inframe_insertion	Exon 3 of 6	ENST00000353383.6	NP_109590.3	Q7Z5J4-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
RAI1	ENST00000353383.6 link	c.843_872dupGCAGCAGCAGCAGCAGCAGCAGCAGCAGCA	p.Gln282_Gln291dup	disruptive_inframe_insertion	Exon 3 of 6	1	NM_030665.4	ENSP00000323074.4		Q7Z5J4-1
RAI1	ENST00000395774.1 link	c.843_872dupGCAGCAGCAGCAGCAGCAGCAGCAGCAGCA	p.Gln282_Gln291dup	disruptive_inframe_insertion	Exon 2 of 2	2		ENSP00000379120.1		A8MXE8

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

Data not reliable, filtered out with message: AS_VQSR

AF:

0.00000235

AC:

AN:

1278812

Hom.:

Cov.:

AF XY:

0.00000316

AC XY:

AN XY:

632490

show subpopulations

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

African (AFR)

AF:

0.00

AC:

AN:

28608

American (AMR)

AF:

0.00

AC:

AN:

31712

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

23378

East Asian (EAS)

AF:

0.00

AC:

AN:

18624

South Asian (SAS)

AF:

0.00

AC:

AN:

55806

European-Finnish (FIN)

AF:

0.00

AC:

AN:

46186

Middle Eastern (MID)

AF:

0.00

AC:

AN:

4866

European-Non Finnish (NFE)

AF:

0.00000295

AC:

AN:

1017670

Other (OTH)

AF:

0.00

AC:

AN:

51962

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 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: 0.292

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

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>80

Age

GnomAD4 genome

Cov.:

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not provided

Benign:1

Feb 24, 2022

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

PhyloP100

1.4

Splicing

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

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over