7-127652393-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 3P and 1B. PM2 PP2 BP4

The NM_014390.4(SND1):c.20G>A(p.Ser7Asn) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000138 in 1,446,644 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: SND1 NM_014390.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 2.56

Genes affected

SND1 (HGNC:30646): (staphylococcal nuclease and tudor domain containing 1) This gene encodes a transcriptional co-activator that interacts with the acidic domain of Epstein-Barr virus nuclear antigen 2 (EBNA 2), a transcriptional activator that is required for B-lymphocyte transformation. Other transcription factors that interact with this protein are signal transducers and activators of transcription, STATs. This protein is also thought to be essential for normal cell growth. A similar protein in mammals and other organisms is a component of the RNA-induced silencing complex (RISC). [provided by RefSeq, Jul 2016]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant where missense usually causes diseases, SND1
• BP4: Computational evidence support a benign effect (MetaRNN=0.29738793).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SND1	NM_014390.4	c.20G>A	p.Ser7Asn	missense_variant	1/24	ENST00000354725.8
SND1	XM_017011987.3	c.20G>A	p.Ser7Asn	missense_variant	1/17

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SND1	ENST00000354725.8	c.20G>A	p.Ser7Asn	missense_variant	1/24	1	NM_014390.4	P1
SND1	ENST00000463020.1	n.200G>A		non_coding_transcript_exon_variant	1/2	2

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD3 exomes AF: 0.00000914 AC: 2 AN: 218752 Hom.: 0 AF XY: 0.0000169 AC XY: 2 AN XY: 118580

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.0000363

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000102

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000138 AC: 2 AN: 1446644 Hom.: 0 Cov.: 30 AF XY: 0.00000279 AC XY: 2 AN XY: 717940

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: 0.0000120

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 9.05e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

Bravo AF: 0.00000756

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 19, 2022

The c.20G>A (p.S7N) alteration is located in exon 1 (coding exon 1) of the SND1 gene. This alteration results from a G to A substitution at nucleotide position 20, causing the serine (S) at amino acid position 7 to be replaced by an asparagine (N). 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	0.095
BayesDel_addAF	Benign	-0.20	T
BayesDel_noAF	Benign	-0.53
Cadd	Benign	22
Dann	Uncertain	0.99
DEOGEN2	Benign	0.019	T
Eigen	Benign	-0.11
Eigen_PC	Benign	0.017
FATHMM_MKL	Benign	0.45	N
LIST_S2	Benign	0.71	T
M_CAP	Benign	0.016	T
MetaRNN	Benign	0.30	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	1.0	L
MutationTaster	Benign	0.96	D
PrimateAI	Uncertain	0.65	T
PROVEAN	Benign	-0.49	N
REVEL	Benign	0.069
Sift	Benign	0.34	T
Sift4G	Benign	0.38	T
Polyphen		0.27	B
Vest4		0.57
MutPred		0.13		Loss of glycosylation at S7 (P = 0.0028);
MVP		0.49
MPC		0.57
ClinPred		0.48	T
GERP RS		4.0
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.20
gMVP		0.33

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: rs940214396; hg19: chr7-127292447;