20-6075049-G-T

Variant summary

Our verdict is Benign. Variant got -12 ACMG points: 0P and 12B. BP4_Strong BA1

The NM_017671.5(FERMT1):c.*2124C>A variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.234 in 128,912 control chromosomes in the GnomAD database, including 3,736 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: 𝑓 0.23 (3732 hom., cov: 23)
  • Exomes 𝑓: 0.20 (4 hom.)
• Consequence: FERMT1 NM_017671.5 3_prime_UTR
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -1.13

Genes affected

FERMT1 (HGNC:15889): (FERM domain containing kindlin 1) This gene encodes a member of the fermitin family, and contains a FERM domain and a pleckstrin homology domain. The encoded protein is involved in integrin signaling and linkage of the actin cytoskeleton to the extracellular matrix. Mutations in this gene have been linked to Kindler syndrome. [provided by RefSeq, Dec 2009]

ACMG classification

Verdict is Benign. Variant got -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.92).
• BA1: GnomAd4 highest subpopulation (EAS) allele frequency at 95% confidence interval = 0.558 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
FERMT1	NM_017671.5	c.*2124C>A		3_prime_UTR_variant	15/15	ENST00000217289.9
FERMT1	XM_024451935.2	c.*2124C>A		3_prime_UTR_variant	15/15
FERMT1	XM_047440259.1	c.*2124C>A		3_prime_UTR_variant	15/15
FERMT1	XM_047440260.1	c.*2124C>A		3_prime_UTR_variant	14/14

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
FERMT1	ENST00000217289.9	c.*2124C>A		3_prime_UTR_variant	15/15	1	NM_017671.5	P1
FERMT1	ENST00000478194.1	n.3118C>A		non_coding_transcript_exon_variant	7/7	1

Frequencies

GnomAD3 genomes AF: 0.234 AC: 30093 AN: 128830 Hom.: 3730 Cov.: 23

Gnomad AFR AF: 0.160

Gnomad AMI AF: 0.222

Gnomad AMR AF: 0.329

Gnomad ASJ AF: 0.189

Gnomad EAS AF: 0.576

Gnomad SAS AF: 0.245

Gnomad FIN AF: 0.162

Gnomad MID AF: 0.224

Gnomad NFE AF: 0.233

Gnomad OTH AF: 0.250

GnomAD4 exome AF: 0.203 AC: 13 AN: 64 Hom.: 4 Cov.: 0 AF XY: 0.176 AC XY: 6 AN XY: 34

Gnomad4 EAS exome AF: 0.203

GnomAD4 genome AF: 0.234 AC: 30109 AN: 128848 Hom.: 3732 Cov.: 23 AF XY: 0.236 AC XY: 14599 AN XY: 61956

Gnomad4 AFR AF: 0.160

Gnomad4 AMR AF: 0.329

Gnomad4 ASJ AF: 0.189

Gnomad4 EAS AF: 0.576

Gnomad4 SAS AF: 0.245

Gnomad4 FIN AF: 0.162

Gnomad4 NFE AF: 0.233

Gnomad4 OTH AF: 0.255

Alfa AF: 0.0135 Hom.: 19

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Kindler syndrome Uncertain:1

Uncertain significance, 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, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.92
Cadd	Benign	1.2
Dann	Benign	0.22

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: rs60522800; hg19: chr20-6055696;