17-17794863-C-T

Position:

• chr17-17794863-C-T

Variant summary

Our verdict is Benign. Variant got -8 ACMG points: 0P and 8B. BP4_Strong BS2

The NM_030665.4(RAI1):​c.1915C>T​(p.Pro639Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000089 in 1,460,984 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000089 (0 hom.)
• Consequence: RAI1 NM_030665.4 missense
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:3 B:1
• Conservation: PhyloP100: 0.492

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]

ACMG classification

Verdict is Benign. Variant got -8 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.052717835).
• BS2: High AC in GnomAdExome4 at 13 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
RAI1	NM_030665.4	c.1915C>T	p.Pro639Ser	missense_variant	3/6	ENST00000353383.6	NP_109590.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
RAI1	ENST00000353383.6	c.1915C>T	p.Pro639Ser	missense_variant	3/6	1	NM_030665.4	ENSP00000323074	P1
RAI1	ENST00000395774.1	c.1915C>T	p.Pro639Ser	missense_variant	2/2	2		ENSP00000379120

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000890 AC: 13 AN: 1460984 Hom.: 0 Cov.: 94 AF XY: 0.00000688 AC XY: 5 AN XY: 726794

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: 0.0000117

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

EpiCase AF: 0.0000545

EpiControl AF: 0.00

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:3 Benign:1

Revision: criteria provided, conflicting classifications

Submissions by phenotype

not provided Uncertain:1 Benign:1

Benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Feb 09, 2022	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Athena Diagnostics	Sep 30, 2017	- -

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Feb 09, 2024

Variant summary: RAI1 c.1915C>T (p.Pro639Ser) results in a non-conservative amino acid change in the encoded protein sequence. Three of five in-silico tools predict a benign effect of the variant on protein function. The frequency data for this variant in gnomAD is considered unreliable, as metrics indicate poor data quality at this position. To our knowledge, no occurrence of c.1915C>T in individuals affected with Smith-Magenis Syndrome and no experimental evidence demonstrating its impact on protein function have been reported. ClinVar contains an entry for this variant (Variation ID: 586394). Based on the evidence outlined above, the variant was classified as uncertain significance. -

Inborn genetic diseases Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Mar 28, 2023

The c.1915C>T (p.P639S) alteration is located in exon 3 (coding exon 1) of the RAI1 gene. This alteration results from a C to T substitution at nucleotide position 1915, causing the proline (P) at amino acid position 639 to be replaced by a serine (S). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.078
BayesDel_addAF	Benign	-0.20	T
BayesDel_noAF	Benign	-0.52
CADD	Benign	0.88
DANN	Benign	0.60
DEOGEN2	Benign	0.060	T;.;.
Eigen	Benign	-0.57
Eigen_PC	Benign	-0.45
FATHMM_MKL	Benign	0.20	N
LIST_S2	Benign	0.71	T;T;T
M_CAP	Benign	0.023	T
MetaRNN	Benign	0.053	T;T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	1.1	L;.;.
MutationTaster	Benign	0.92	D;D
PrimateAI	Benign	0.35	T
PROVEAN	Benign	-0.33	N;N;.
REVEL	Benign	0.063
Sift	Benign	0.47	T;T;.
Sift4G	Benign	0.55	T;T;.
Polyphen		0.0010	B;.;.
Vest4		0.10
MutPred		0.28		Loss of catalytic residue at P639 (P = 2e-04);Loss of catalytic residue at P639 (P = 2e-04);.;
MVP		0.068
MPC		0.27
ClinPred		0.053	T
GERP RS		2.8
Varity_R		0.016
gMVP		0.076

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: rs1030615093; hg19: chr17-17698177;