20-24584957-G-C

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_024893.3(SYNDIG1):c.582G>C(p.Trp194Cys) variant causes a missense change involving the alteration of a conserved nucleotide. 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: 31)
• Consequence: SYNDIG1 NM_024893.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 9.77

Genes affected

SYNDIG1 (HGNC:15885): (synapse differentiation inducing 1) This gene encodes a protein that belongs to the interferon-induced transmembrane family of proteins. A similar protein in rat is thought to regulate the development of excitatory synapses. [provided by RefSeq, Jul 2013]

ACMG classification

Verdict is Uncertain_significance. Variant got 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.925

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SYNDIG1	NM_024893.3	c.582G>C	p.Trp194Cys	missense_variant	3/4	ENST00000376862.4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SYNDIG1	ENST00000376862.4	c.582G>C	p.Trp194Cys	missense_variant	3/4	1	NM_024893.3	P1
SYNDIG1	ENST00000482637.1	n.56G>C		non_coding_transcript_exon_variant	1/2	3

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 31

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

Jun 29, 2022

The c.582G>C (p.W194C) alteration is located in exon 3 (coding exon 2) of the SYNDIG1 gene. This alteration results from a G to C substitution at nucleotide position 582, causing the tryptophan (W) at amino acid position 194 to be replaced by a cysteine (C). 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	Pathogenic	0.99
BayesDel_addAF	Pathogenic	0.47	D
BayesDel_noAF	Pathogenic	0.43
Cadd	Pathogenic	33
Dann	Uncertain	0.99
DEOGEN2	Uncertain	0.77	D
Eigen	Uncertain	0.68
Eigen_PC	Uncertain	0.63
FATHMM_MKL	Uncertain	0.97	D
LIST_S2	Uncertain	0.97	D
M_CAP	Pathogenic	0.32	D
MetaRNN	Pathogenic	0.93	D
MetaSVM	Uncertain	0.46	D
MutationAssessor	Pathogenic	3.2	M
MutationTaster	Benign	1.0	D
PrimateAI	Pathogenic	0.92	D
PROVEAN	Pathogenic	-12	D
REVEL	Pathogenic	0.71
Sift	Pathogenic	0.0	D
Sift4G	Pathogenic	0.0	D
Polyphen		1.0	D
Vest4		0.92
MutPred		0.56		Loss of helix (P = 0.1299);
MVP		0.88
MPC		1.2
ClinPred		1.0	D
GERP RS		4.2
Varity_R		0.89
gMVP		0.88

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: chr20-24565593;