Genetic Variant RAI1:p.Ala1048Val (chr17-17796091-C-T) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_030665.4(RAI1):c.3143C>T(p.Ala1048Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000007 in 1,429,116 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. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A1048D) has been classified as Likely benign.

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 7.0e-7 ( 0 hom. )

Consequence

RAI1
NM_030665.4 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 0.100

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 -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.041614115).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
RAI1	NM_030665.4 link	c.3143C>T	p.Ala1048Val	missense_variant	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.3143C>T	p.Ala1048Val	missense_variant	Exon 3 of 6	1	NM_030665.4	ENSP00000323074.4		Q7Z5J4-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD2 exomes

AF:

0.0000107

AC:

AN:

187014

AF XY:

0.00000975

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000350

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000128

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

7.00e-7

AC:

AN:

1429116

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

708152

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:

32872

American (AMR)

AF:

0.0000251

AC:

AN:

39778

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25478

East Asian (EAS)

AF:

0.00

AC:

AN:

38092

South Asian (SAS)

AF:

0.00

AC:

AN:

82494

European-Finnish (FIN)

AF:

0.00

AC:

AN:

49626

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5730

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1095946

Other (OTH)

AF:

0.00

AC:

AN:

59100

⚠️ 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: 0.225

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

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.070

BayesDel_addAF

Benign

-0.36

BayesDel_noAF

Benign

-0.64

CADD

Benign

(source)

DANN

Benign

0.90

DEOGEN2

Benign

0.098

T;.

Eigen

Benign

-1.1

Eigen_PC

Benign

-1.1

FATHMM_MKL

Benign

0.013

LIST_S2

Benign

0.62

T;T

M_CAP

Benign

0.034

MetaRNN

Benign

0.042

T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

0.14

N;.

PhyloP100

0.10

PrimateAI

Uncertain

0.57

PROVEAN

Benign

-0.55

N;.

REVEL

Benign

0.041

Sift

Benign

0.66

T;.

Sift4G

Benign

0.77

T;.

Polyphen

0.0010

B;.

Vest4

0.061

MutPred

0.12

Gain of catalytic residue at A1048 (P = 0.0778);.;

MVP

0.10

MPC

0.27

ClinPred

0.024

GERP RS

-0.98

Varity_R

0.014

gMVP

0.12

Mutation Taster

=93/7

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over