1-26863700-C-T

Position:

• chr1-26863700-C-T

Variant summary

Our verdict is Likely benign. Variant got -4 ACMG points: 2P and 6B. PM2 BP4_Moderate BS2

The NM_006142.5(SFN):​c.488C>T​(p.Pro163Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000342 in 1,461,836 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts 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: 0.0000034 (0 hom.)
• Consequence: SFN NM_006142.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 2.94

Genes affected

SFN (HGNC:10773): (stratifin) This gene encodes a cell cycle checkpoint protein. The encoded protein binds to translation and initiation factors and functions as a regulator of mitotic translation. In response to DNA damage this protein plays a role in preventing DNA errors during mitosis. [provided by RefSeq, Aug 2017]

ACMG classification

Verdict is Likely_benign. Variant got -4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.19632599).
• BS2: High AC in GnomAdExome4 at 5 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
SFN	NM_006142.5	c.488C>T	p.Pro163Leu	missense_variant	1/1	ENST00000339276.6	NP_006133.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
SFN	ENST00000339276.6	c.488C>T	p.Pro163Leu	missense_variant	1/1	6	NM_006142.5	ENSP00000340989.4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000342 AC: 5 AN: 1461836 Hom.: 0 Cov.: 33 AF XY: 0.00000413 AC XY: 3 AN XY: 727230

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.0000252

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000360

Gnomad4 OTH exome AF: 0.00

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

Jul 15, 2024

The c.488C>T (p.P163L) alteration is located in exon 1 (coding exon 1) of the SFN gene. This alteration results from a C to T substitution at nucleotide position 488, causing the proline (P) at amino acid position 163 to be replaced by a leucine (L). 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	0.16
BayesDel_addAF	Benign	-0.17	T
BayesDel_noAF	Benign	-0.48
CADD	Uncertain	24
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.48	T
Eigen	Benign	0.029
Eigen_PC	Benign	0.16
FATHMM_MKL	Benign	0.57	D
LIST_S2	Benign	0.80	T
M_CAP	Benign	0.012	T
MetaRNN	Benign	0.20	T
MetaSVM	Benign	-0.96	T
MutationAssessor	Benign	1.9	L
PrimateAI	Uncertain	0.58	T
PROVEAN	Uncertain	-3.5	D
REVEL	Benign	0.058
Sift	Benign	0.057	T
Sift4G	Uncertain	0.060	T
Polyphen		0.11	B
Vest4		0.11
MutPred		0.37		Loss of glycosylation at P163 (P = 0.0214);
MVP		0.55
MPC		0.63
ClinPred		0.96	D
GERP RS		3.7
Varity_R		0.32
gMVP		0.44

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: rs1468889117; hg19: chr1-27190191; COSMIC: COSV59433377;