4-176328282-C-G

Variant names:

• chr4-176328282-C-G
• NM_021928.4:c.495C>G

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_021928.4(SPCS3):​c.495C>G​(p.His165Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000686 in 1,458,228 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/22 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.9e-7 (0 hom.)
• Consequence: SPCS3 NM_021928.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.102

Genes affected

SPCS3 (HGNC:26212): (signal peptidase complex subunit 3) Predicted to enable peptidase activity. Involved in proteolysis and viral protein processing. Located in endoplasmic reticulum. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SPCS3	NM_021928.4	c.495C>G	p.His165Gln	missense_variant	Exon 5 of 5	ENST00000503362.2	NP_068747.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SPCS3	ENST00000503362.2	c.495C>G	p.His165Gln	missense_variant	Exon 5 of 5	1	NM_021928.4	ENSP00000427463.1
SPCS3	ENST00000507001.1	n.407C>G		non_coding_transcript_exon_variant	Exon 2 of 2	2
SPCS3	ENST00000507678.5	n.2531C>G		non_coding_transcript_exon_variant	Exon 4 of 4	2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.86e-7 AC: 1 AN: 1458228 Hom.: 0 Cov.: 30 AF XY: 0.00 AC XY: 0 AN XY: 725298

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: 9.01e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.086
BayesDel_addAF	Benign	-0.19	T
BayesDel_noAF	Benign	-0.51
CADD	Benign	19
DANN	Benign	0.76
DEOGEN2	Benign	0.021	T
Eigen	Benign	-0.91
Eigen_PC	Benign	-0.76
FATHMM_MKL	Uncertain	0.77	D
LIST_S2	Benign	0.73	T
M_CAP	Benign	0.0038	T
MetaRNN	Benign	0.084	T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	0.37	N
PrimateAI	Uncertain	0.71	T
PROVEAN	Benign	-0.47	N
REVEL	Benign	0.25
Sift	Benign	0.63	T
Sift4G	Benign	0.40	T
Polyphen		0.0010	B
Vest4		0.16
MutPred		0.34		Gain of sheet (P = 0.1451);
MVP		0.068
MPC		1.2
ClinPred		0.20	T
GERP RS		-0.029
Varity_R		0.085
gMVP		0.84

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.93		Details are displayed if max score is > 0.2
DS_DG_spliceai		0.93		Position offset: 0

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: chr4-177249433;