rs116778145

chr17-28534786-C-T

Variant summary

Our verdict is Benign. Variant got -21 ACMG points: 0P and 21B. BP4_Strong BP6_Very_Strong BP7 BS1 BS2

The NM_001369369.1(FOXN1):c.1215C>T(p.Ser405=) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00095 in 1,613,632 control chromosomes in the GnomAD database, including 19 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

• Frequency:
  • Genomes: 𝑓 0.0053 (12 hom., cov: 33)
  • Exomes 𝑓: 0.00050 (7 hom.)
• Consequence: FOXN1 NM_001369369.1 synonymous
• Clinical Significance: Benign/Likely benign criteria provided, multiple submitters, no conflicts B:4
• Conservation: PhyloP100: 0.375

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 -21 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.61).
• BP6: Variant 17-28534786-C-T is Benign according to our data. Variant chr17-28534786-C-T is described in ClinVar as [Likely_benign]. Clinvar id is 390081.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BP7: Synonymous conserved (PhyloP=0.375 with no splicing effect.
• BS1: Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00529 (806/152274) while in subpopulation AFR AF= 0.018 (749/41562). AF 95% confidence interval is 0.017. There are 12 homozygotes in gnomad4. There are 387 alleles in male gnomad4 subpopulation. Median coverage is 33. This position pass quality control queck.
• BS2: High Homozygotes in GnomAd at 11 SD gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
FOXN1	NM_001369369.1	c.1215C>T	p.Ser405=	synonymous_variant	8/9	ENST00000579795.6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
FOXN1	ENST00000579795.6	c.1215C>T	p.Ser405=	synonymous_variant	8/9	1	NM_001369369.1	P1
FOXN1	ENST00000226247.2	c.1215C>T	p.Ser405=	synonymous_variant	7/8	1		P1
RSKR	ENST00000481916.6	c.*1195+69265G>A		intron_variant, NMD_transcript_variant		1
FOXN1	ENST00000577936.2	c.1215C>T	p.Ser405=	synonymous_variant	8/9	4		P1

Frequencies

GnomAD3 genomes AF: 0.00523 AC: 796 AN: 152156 Hom.: 11 Cov.: 33

Gnomad AFR AF: 0.0179

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00308

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00

Gnomad OTH AF: 0.00335

GnomAD3 exomes AF: 0.00133 AC: 329 AN: 247152 Hom.: 4 AF XY: 0.000984 AC XY: 132 AN XY: 134096

Gnomad AFR exome AF: 0.0178

Gnomad AMR exome AF: 0.00130

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.000497

GnomAD4 exome AF: 0.000497 AC: 727 AN: 1461358 Hom.: 7 Cov.: 35 AF XY: 0.000422 AC XY: 307 AN XY: 726958

Gnomad4 AFR exome AF: 0.0176

Gnomad4 AMR exome AF: 0.00139

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: 0.00000540

Gnomad4 OTH exome AF: 0.00111

GnomAD4 genome AF: 0.00529 AC: 806 AN: 152274 Hom.: 12 Cov.: 33 AF XY: 0.00520 AC XY: 387 AN XY: 74440

Gnomad4 AFR AF: 0.0180

Gnomad4 AMR AF: 0.00307

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.00

Gnomad4 OTH AF: 0.00473

Alfa AF: 0.00239 Hom.: 0

Bravo AF: 0.00599

Asia WGS AF: 0.00173 AC: 6 AN: 3478

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:4

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not specified Benign:2

Likely benign, criteria provided, single submitter	clinical testing	GeneDx	Oct 14, 2016	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. -
Benign, criteria provided, single submitter	clinical testing	Women's Health and Genetics/Laboratory Corporation of America, LabCorp	May 03, 2022	- -

T-cell immunodeficiency, congenital alopecia, and nail dystrophy Benign:2

Benign, criteria provided, single submitter	clinical testing	Invitae	Jan 31, 2024	- -
Benign, criteria provided, single submitter	clinical testing	Illumina Laboratory Services, Illumina	Jan 13, 2018	This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.61
Cadd	Benign	12
Dann	Benign	0.68

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: rs116778145; hg19: chr17-26861804;