17-28523792-TTCTCTCTCTCTCTCTCTCTCTCTCTCTC-TTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTC

Variant names:

• chr17-28523792-T-TTCTCTCTCTCTCTCTCTC
• rs10527420
• NM_001369369.1:c.-14-141_-14-124dupTCTCTCTCTCTCTCTCTC

Variant summary

Our verdict is Likely benign. The variant received -4 ACMG points: 0P and 4B. BS1

The NM_001369369.1(FOXN1):​c.-14-141_-14-124dupTCTCTCTCTCTCTCTCTC variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000753 in 650,488 control chromosomes in the GnomAD database, with no homozygous occurrence. It is difficult to determine the true allele frequency of this variant because it is of type INS_BIG, and the frequency of such variant types in population databases may be underestimated and unreliable. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. The gene FOXN1 is included in the ClinGen Criteria Specification Registry.

• Frequency:
  • Genomes: 𝑓 0.00019 (0 hom., cov: 0)
  • Exomes 𝑓: 0.000043 (0 hom.)
• Consequence: FOXN1 NM_001369369.1 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.0970
• Publications: 1 publications found

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

Specifications for FOXN1 are available in the ClinGen Criteria Specification Registry and recommended for reference when assigning criteria.

Our verdict: Likely_benign. The variant received -4 ACMG points.

• BS1: Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.000187 (27/144350) while in subpopulation AFR AF = 0.000609 (23/37740). AF 95% confidence interval is 0.000416. There are 0 homozygotes in GnomAd4. There are 8 alleles in the male GnomAd4 subpopulation. Median coverage is 0. This position passed quality control check.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001369369.1. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	FOXN1	NM_001369369.1	MANE Select	c.-14-141_-14-124dupTCTCTCTCTCTCTCTCTC		intron	N/A	NP_001356298.1	O15353
	FOXN1	NM_003593.3		c.-178_-177insTCTCTCTCTCTCTCTCTC		upstream_gene	N/A	NP_003584.2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	FOXN1	ENST00000579795.6	TSL:1 MANE Select	c.-14-164_-14-163insTCTCTCTCTCTCTCTCTC		intron	N/A	ENSP00000464645.1	O15353
	RSKR	ENST00000481916.6	TSL:1	n.*1196-67684_*1196-67683insGAGAGAGAGAGAGAGAGA		intron	N/A	ENSP00000436369.2	Q96LW2-2
	FOXN1	ENST00000577936.2	TSL:4	c.-9-169_-9-168insTCTCTCTCTCTCTCTCTC		intron	N/A	ENSP00000462159.2	O15353

Frequencies

GnomAD3 genomes AF: 0.000187 AC: 27 AN: 144250 Hom.: 0 Cov.: 0

Gnomad AFR AF: 0.000611

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.000292

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000449

Gnomad OTH AF: 0.00

GnomAD4 exome AF: 0.0000435 AC: 22 AN: 506138 Hom.: 0 AF XY: 0.0000404 AC XY: 11 AN XY: 272128

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.000712 AC: 10 AN: 14040

American (AMR) AF: 0.000107 AC: 3 AN: 28078

Ashkenazi Jewish (ASJ) AF: 0.0000568 AC: 1 AN: 17594

East Asian (EAS) AF: 0.0000324 AC: 1 AN: 30854

South Asian (SAS) AF: 0.0000175 AC: 1 AN: 57046

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 35504

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 2412

European-Non Finnish (NFE) AF: 0.0000171 AC: 5 AN: 292616

Other (OTH) AF: 0.0000357 AC: 1 AN: 27994

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0.00000600139), which strongly suggests a high chance of mosaicism in these individuals.

GnomAD4 genome AF: 0.000187 AC: 27 AN: 144350 Hom.: 0 Cov.: 0 AF XY: 0.000114 AC XY: 8 AN XY: 69948

African (AFR) AF: 0.000609 AC: 23 AN: 37740

American (AMR) AF: 0.00 AC: 0 AN: 14332

Ashkenazi Jewish (ASJ) AF: 0.000292 AC: 1 AN: 3430

East Asian (EAS) AF: 0.00 AC: 0 AN: 4768

South Asian (SAS) AF: 0.00 AC: 0 AN: 4440

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 9668

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 290

European-Non Finnish (NFE) AF: 0.0000449 AC: 3 AN: 66796

Other (OTH) AF: 0.00 AC: 0 AN: 1996

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		0.097

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs10527420; hg19: chr17-26850810;