3-113566493-A-G

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2 PP3

The NM_017699.3(SIDT1):c.296A>G(p.Gln99Arg) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: SIDT1 NM_017699.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 6.70

Genes affected

SIDT1 (HGNC:25967): (SID1 transmembrane family member 1) The protein encoded by this gene belongs to SID1 family of transmembrane dsRNA-gated channels. Family members transport dsRNA into cells and are required for systemic RNA interference. [provided by RefSeq, May 2017]

ACMG classification

Verdict is Uncertain_significance. Variant got 3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.771

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SIDT1	NM_017699.3	c.296A>G	p.Gln99Arg	missense_variant	2/25	ENST00000264852.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SIDT1	ENST00000264852.9	c.296A>G	p.Gln99Arg	missense_variant	2/25	2	NM_017699.3	P4
SIDT1	ENST00000393830.4	c.296A>G	p.Gln99Arg	missense_variant	2/26	1		A2
SIDT1	ENST00000483946.1	n.141A>G		non_coding_transcript_exon_variant	2/3	4
SIDT1	ENST00000491730.5	n.763A>G		non_coding_transcript_exon_variant	2/6	5

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Dec 27, 2023

The c.296A>G (p.Q99R) alteration is located in exon 2 (coding exon 2) of the SIDT1 gene. This alteration results from a A to G substitution at nucleotide position 296, causing the glutamine (Q) at amino acid position 99 to be replaced by an arginine (R). 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	Uncertain	0.43
BayesDel_addAF	Uncertain	0.035	T
BayesDel_noAF	Benign	-0.19
Cadd	Uncertain	26
Dann	Uncertain	1.0
DEOGEN2	Benign	0.25	T;.
Eigen	Uncertain	0.65
Eigen_PC	Uncertain	0.65
FATHMM_MKL	Uncertain	0.97	D
LIST_S2	Benign	0.85	D;D
M_CAP	Benign	0.017	T
MetaRNN	Pathogenic	0.77	D;D
MetaSVM	Benign	-1.1	T
MutationAssessor	Uncertain	2.5	M;M
MutationTaster	Benign	1.0	D;D
PrimateAI	Uncertain	0.65	T
PROVEAN	Uncertain	-3.2	D;D
REVEL	Benign	0.29
Sift	Uncertain	0.0030	D;D
Sift4G	Uncertain	0.0060	D;D
Polyphen		1.0	D;.
Vest4		0.79
MutPred		0.46		Loss of catalytic residue at Q99 (P = 0.0048);Loss of catalytic residue at Q99 (P = 0.0048);
MVP		0.21
MPC		0.47
ClinPred		0.95	D
GERP RS		5.6
Varity_R		0.35
gMVP		0.78

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr3-113285340;