1-152303047-G-T

Position:

• chr1-152303047-G-T

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_002016.2(FLG):​c.11839C>A​(p.Arg3947Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 15/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R3947C) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 31)
• Consequence: FLG NM_002016.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -4.06

Genes affected

FLG (HGNC:3748): (filaggrin) The protein encoded by this gene is an intermediate filament-associated protein that aggregates keratin intermediate filaments in mammalian epidermis. It is initially synthesized as a polyprotein precursor, profilaggrin (consisting of multiple filaggrin units of 324 aa each), which is localized in keratohyalin granules, and is subsequently proteolytically processed into individual functional filaggrin molecules. Mutations in this gene are associated with ichthyosis vulgaris.[provided by RefSeq, Dec 2009]

FLG-AS1 (HGNC:27913): (cervical cancer associated DHX9 suppressive transcript)

ACMG classification

Verdict is Likely_benign. Variant got -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.057771593).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
FLG	NM_002016.2	c.11839C>A	p.Arg3947Ser	missense_variant	3/3	ENST00000368799.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
FLG	ENST00000368799.2	c.11839C>A	p.Arg3947Ser	missense_variant	3/3	1	NM_002016.2	P1
FLG-AS1	ENST00000653548.1	n.390-29536G>T		intron_variant, non_coding_transcript_variant

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 31

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Inborn genetic diseases Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Oct 05, 2021

The c.11839C>A (p.R3947S) alteration is located in exon 3 (coding exon 2) of the FLG gene. This alteration results from a C to A substitution at nucleotide position 11839, causing the arginine (R) at amino acid position 3947 to be replaced by a serine (S). 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	0.28
BayesDel_addAF	Benign	-0.36	T
BayesDel_noAF	Benign	-0.75
CADD	Benign	0.045
DANN	Benign	0.54
DEOGEN2	Benign	0.027	T
Eigen	Benign	-1.4
Eigen_PC	Benign	-1.5
FATHMM_MKL	Benign	0.0010	N
LIST_S2	Benign	0.35	T
M_CAP	Benign	0.0083	T
MetaRNN	Benign	0.058	T
MetaSVM	Benign	-0.94	T
MutationAssessor	Benign	0.46	N
MutationTaster	Benign	1.0	N
PrimateAI	Benign	0.21	T
PROVEAN	Benign	-0.73	N
REVEL	Benign	0.087
Sift	Uncertain	0.0070	D
Polyphen		0.015	B
Vest4		0.19
MutPred		0.31		Gain of glycosylation at R3947 (P = 2e-04);
MVP		0.092
ClinPred		0.096	T
GERP RS		-3.1
Varity_R		0.098
gMVP		0.0086

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr1-152275523;