chr17-28523978-G-A

Position:

• chr17-28523978-G-A

Variant summary

Our verdict is Benign. Variant got -15 ACMG points: 2P and 17B. PM2 BP4_Strong BP6_Very_Strong BP7 BS1

The NM_001369369.1(FOXN1):​c.9G>A​(p.Ser3=) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000484 in 1,612,554 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

• Frequency:
  • Genomes: 𝑓 0.0027 (0 hom., cov: 32)
  • Exomes 𝑓: 0.00025 (1 hom.)
• Consequence: FOXN1 NM_001369369.1 synonymous
• Clinical Significance: Benign/Likely benign criteria provided, multiple submitters, no conflicts B:2
• Conservation: PhyloP100: -1.36

Genes affected

FOXN1 (HGNC:12765): (forkhead box N1) Mutations in the winged-helix transcription factor gene at the nude locus in mice and rats produce the pleiotropic phenotype of hairlessness and athymia, resulting in a severely compromised immune system. This gene is orthologous to the mouse and rat genes and encodes a similar DNA-binding transcription factor that is thought to regulate keratin gene expression. A mutation in this gene has been correlated with T-cell immunodeficiency, the skin disorder congenital alopecia, and nail dystrophy. Alternative splicing in the 5' UTR of this gene has been observed. [provided by RefSeq, Jul 2008]

RSKR (HGNC:26314): (ribosomal protein S6 kinase related) Predicted to enable protein kinase activity. Predicted to be involved in protein phosphorylation. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Verdict is Benign. Variant got -15 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.75).
• BP6: Variant 17-28523978-G-A is Benign according to our data. Variant chr17-28523978-G-A is described in ClinVar as [Likely_benign]. Clinvar id is 468555.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BP7: Synonymous conserved (PhyloP=-1.36 with no splicing effect.
• BS1: Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00273 (415/152146) while in subpopulation AFR AF= 0.00925 (384/41508). AF 95% confidence interval is 0.00849. There are 0 homozygotes in gnomad4. There are 185 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
FOXN1	NM_001369369.1	c.9G>A	p.Ser3=	synonymous_variant	2/9	ENST00000579795.6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
FOXN1	ENST00000579795.6	c.9G>A	p.Ser3=	synonymous_variant	2/9	1	NM_001369369.1	P1
FOXN1	ENST00000226247.2	c.9G>A	p.Ser3=	synonymous_variant	1/8	1		P1
RSKR	ENST00000481916.6	c.*1196-67869C>T		intron_variant, NMD_transcript_variant		1
FOXN1	ENST00000577936.2	c.9G>A	p.Ser3=	synonymous_variant	2/9	4		P1

Frequencies

GnomAD3 genomes AF: 0.00272 AC: 414 AN: 152028 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.00925

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00157

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.000193

Gnomad SAS AF: 0.000207

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000441

Gnomad OTH AF: 0.000957

GnomAD3 exomes AF: 0.000810 AC: 200 AN: 247034 Hom.: 0 AF XY: 0.000632 AC XY: 85 AN XY: 134554

Gnomad AFR exome AF: 0.0114

Gnomad AMR exome AF: 0.000494

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.000163

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.000250 AC: 365 AN: 1460408 Hom.: 1 Cov.: 35 AF XY: 0.000234 AC XY: 170 AN XY: 726532

Gnomad4 AFR exome AF: 0.00858

Gnomad4 AMR exome AF: 0.000470

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.0000252

Gnomad4 SAS exome AF: 0.0000812

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.0000144

Gnomad4 OTH exome AF: 0.000497

GnomAD4 genome AF: 0.00273 AC: 415 AN: 152146 Hom.: 0 Cov.: 32 AF XY: 0.00249 AC XY: 185 AN XY: 74374

Gnomad4 AFR AF: 0.00925

Gnomad4 AMR AF: 0.00157

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.000194

Gnomad4 SAS AF: 0.000207

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.0000441

Gnomad4 OTH AF: 0.000947

Alfa AF: 0.00152 Hom.: 1

Bravo AF: 0.00325

EpiCase AF: 0.0000545

EpiControl AF: 0.00

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not specified Benign:1

Likely benign, criteria provided, single submitter

clinical testing

GeneDx

Sep 21, 2017

This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -

T-cell immunodeficiency, congenital alopecia, and nail dystrophy Benign:1

Benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jan 31, 2024

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.75
CADD	Benign	13
DANN	Benign	0.90

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.080		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: rs146390262; hg19: chr17-26850996;