4-53273941-G-C

Variant summary

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

The NM_152540.4(SCFD2):c.1196C>G(p.Ala399Gly) variant causes a missense change. The variant allele was found at a frequency of 0.00000958 in 1,461,602 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 12/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000096 (0 hom.)
• Consequence: SCFD2 NM_152540.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 5.57

Genes affected

SCFD2 (HGNC:30676): (sec1 family domain containing 2) Predicted to enable syntaxin binding activity. Predicted to be involved in intracellular protein transport and vesicle docking involved in exocytosis. Predicted to be active in plasma membrane and secretory granule. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.3730139).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SCFD2	NM_152540.4	c.1196C>G	p.Ala399Gly	missense_variant	4/9	ENST00000401642.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SCFD2	ENST00000401642.8	c.1196C>G	p.Ala399Gly	missense_variant	4/9	1	NM_152540.4	P1
SCFD2	ENST00000388940.8	c.1196C>G	p.Ala399Gly	missense_variant	4/8	2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000958 AC: 14 AN: 1461602 Hom.: 0 Cov.: 30 AF XY: 0.00000963 AC XY: 7 AN XY: 727094

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: 0.0000108

Gnomad4 OTH exome AF: 0.0000331

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 20, 2023

The c.1196C>G (p.A399G) alteration is located in exon 4 (coding exon 4) of the SCFD2 gene. This alteration results from a C to G substitution at nucleotide position 1196, causing the alanine (A) at amino acid position 399 to be replaced by a glycine (G). 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	0.21
BayesDel_addAF	Benign	0.0031	T
BayesDel_noAF	Benign	-0.23
Cadd	Benign	23
Dann	Uncertain	0.99
DEOGEN2	Uncertain	0.47	T;.;T
Eigen	Benign	0.057
Eigen_PC	Benign	0.14
FATHMM_MKL	Pathogenic	0.97	D
LIST_S2	Uncertain	0.86	D;D;D
M_CAP	Benign	0.035	D
MetaRNN	Benign	0.37	T;T;T
MetaSVM	Uncertain	-0.046	T
MutationAssessor	Uncertain	2.1	M;M;.
MutationTaster	Benign	0.73	D;D
PrimateAI	Benign	0.41	T
PROVEAN	Benign	-2.3	N;N;.
REVEL	Uncertain	0.29
Sift	Benign	0.034	D;D;.
Sift4G	Benign	0.18	T;T;T
Polyphen		0.17	B;B;.
Vest4		0.39
MutPred		0.45		Gain of relative solvent accessibility (P = 0.0479);Gain of relative solvent accessibility (P = 0.0479);Gain of relative solvent accessibility (P = 0.0479);
MVP		0.82
MPC		0.49
ClinPred		0.92	D
GERP RS		4.6
Varity_R		0.12
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

No publications associated with this variant yet.

Other links and lift over

hg19: chr4-54140108;