14-30630547-T-G

Variant names:

• chr14-30630547-T-G
• rs142810697
• NM_016106.4:c.203T>G

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PVS1_Supporting PM2

The NM_182835.2(SCFD1):​c.2T>G​(p.Met1?) variant causes a start lost change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000000697 in 1,434,726 control chromosomes in the GnomAD database, with no homozygous occurrence. 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)
  • Exomes 𝑓: 7.0e-7 (0 hom.)
• Consequence: SCFD1 NM_182835.2 start_lost
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.56

Genes affected

SCFD1 (HGNC:20726): (sec1 family domain containing 1) Predicted to enable syntaxin binding activity. Involved in negative regulation of autophagosome assembly; regulation of protein transport; and response to toxic substance. Located in cis-Golgi network. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Verdict is Uncertain_significance. Variant got 3 ACMG points.

• PVS1: Start lost variant, no pathogenic variants between lost start and next in-frame start position. Next in-frame start position is after 26 codons. Genomic position: 30634002. Lost 0.044 part of the original CDS.
• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SCFD1	NM_016106.4	c.203T>G	p.Met68Arg	missense_variant	Exon 3 of 25	ENST00000458591.7	NP_057190.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SCFD1	ENST00000458591.7	c.203T>G	p.Met68Arg	missense_variant	Exon 3 of 25	1	NM_016106.4	ENSP00000390783.2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.97e-7 AC: 1 AN: 1434726 Hom.: 0 Cov.: 26 AF XY: 0.00000140 AC XY: 1 AN XY: 715568

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.0000224

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: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

Bravo AF: 0.0000453

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Jul 16, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.203T>G (p.M68R) alteration is located in exon 3 (coding exon 3) of the SCFD1 gene. This alteration results from a T to G substitution at nucleotide position 203, causing the methionine (M) at amino acid position 68 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	Pathogenic	0.65
BayesDel_addAF	Pathogenic	0.38	D
BayesDel_noAF	Pathogenic	0.31
CADD	Uncertain	25
DANN	Uncertain	0.98
DEOGEN2	Uncertain	0.47	T;.;T
Eigen	Uncertain	0.56
Eigen_PC	Uncertain	0.61
FATHMM_MKL	Uncertain	0.93	D
LIST_S2	Uncertain	0.92	D;D;D
M_CAP	Benign	0.054	D
MetaRNN	Uncertain	0.70	D;D;D
MetaSVM	Uncertain	-0.12	T
MutationAssessor	Benign	1.9	L;.;.
PrimateAI	Pathogenic	0.81	D
PROVEAN	Uncertain	-4.2	D;D;D
REVEL	Pathogenic	0.69
Sift	Uncertain	0.0010	D;D;T
Sift4G	Benign	0.18	T;D;T
Polyphen		0.53	P;.;.
Vest4		0.74
MutPred		0.52		Loss of stability (P = 0.0444);.;.;
MVP		0.88
MPC		0.74
ClinPred		0.99	D
GERP RS		5.6
Varity_R		0.87
gMVP		0.82

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: rs142810697; hg19: chr14-31099753;