rs756441396

Positions:

chr17-82091596-C-T

Variant summary

Our verdict is Likely benign. Variant got -5 ACMG points: 0P and 5B. BP4BS2

The ENST00000306749.4(FASN):c.1118G>A(p.Arg373Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000151 in 1,590,170 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 13/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★). Synonymous variant affecting the same amino acid position (i.e. R373R) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.000013 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000015 ( 1 hom. )

Consequence

FASN
ENST00000306749.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:2

Conservation

PhyloP100: 2.81

Variant links:

Genes affected

FASN (HGNC:3594): (fatty acid synthase) The enzyme encoded by this gene is a multifunctional protein. Its main function is to catalyze the synthesis of palmitate from acetyl-CoA and malonyl-CoA, in the presence of NADPH, into long-chain saturated fatty acids. In some cancer cell lines, this protein has been found to be fused with estrogen receptor-alpha (ER-alpha), in which the N-terminus of FAS is fused in-frame with the C-terminus of ER-alpha. [provided by RefSeq, Jul 2008]

FASN links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -5 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.41355756).

BS2

High AC in GnomAdExome4 at 22 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
FASN	NM_004104.5 linkuse as main transcript	c.1118G>A	p.Arg373Gln	missense_variant	9/43	ENST00000306749.4	NP_004095.4
FASN	XM_011523538.3 linkuse as main transcript	c.1118G>A	p.Arg373Gln	missense_variant	9/43		XP_011521840.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
FASN	ENST00000306749.4 linkuse as main transcript	c.1118G>A	p.Arg373Gln	missense_variant	9/43	1	NM_004104.5	ENSP00000304592	P1
FASN	ENST00000634990.1 linkuse as main transcript	c.1118G>A	p.Arg373Gln	missense_variant	9/43	5		ENSP00000488964

Frequencies

GnomAD3 genomes

AF:

0.0000131

AC:

AN:

152192

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000654

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:

0.00

GnomAD3 exomes

AF:

0.0000245

AC:

AN:

204190

Hom.:

AF XY:

0.0000452

AC XY:

AN XY:

110672

show subpopulations

Gnomad AFR exome

AF:

0.0000814

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000758

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000112

Gnomad OTH exome

AF:

0.000194

GnomAD4 exome

AF:

0.0000153

AC:

AN:

1437978

Hom.:

Cov.:

AF XY:

0.0000210

AC XY:

AN XY:

713032

show subpopulations

Gnomad4 AFR exome

AF:

0.0000601

Gnomad4 AMR exome

AF:

0.0000248

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000967

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000726

Gnomad4 OTH exome

AF:

0.0000336

GnomAD4 genome

AF:

0.0000131

AC:

AN:

152192

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74344

show subpopulations

Gnomad4 AFR

AF:

0.0000241

Gnomad4 AMR

AF:

0.0000654

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:

0.00

Alfa

AF:

0.0000712

Hom.:

Bravo

AF:

0.00000378

ExAC

AF:

0.0000251

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Nov 01, 2022

The c.1118G>A (p.R373Q) alteration is located in exon 9 (coding exon 8) of the FASN gene. This alteration results from a G to A substitution at nucleotide position 1118, causing the arginine (R) at amino acid position 373 to be replaced by a glutamine (Q). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Epileptic encephalopathy

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Mar 13, 2022

This sequence change replaces arginine, which is basic and polar, with glutamine, which is neutral and polar, at codon 373 of the FASN protein (p.Arg373Gln). This variant is present in population databases (rs756441396, gnomAD 0.009%). This variant has not been reported in the literature in individuals affected with FASN-related conditions. ClinVar contains an entry for this variant (Variation ID: 574406). Algorithms developed to predict the effect of missense changes on protein structure and function output the following: SIFT: "Deleterious"; PolyPhen-2: "Benign"; Align-GVGD: "Class C0". The glutamine amino acid residue is found in multiple mammalian species, which suggests that this missense change does not adversely affect protein function. Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may create or strengthen a splice site. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.066

BayesDel_addAF

Benign

-0.40

BayesDel_noAF

Benign

-0.61

CADD

Benign

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.65

D;.

Eigen

Benign

0.073

Eigen_PC

Benign

-0.040

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Uncertain

0.90

D;D

M_CAP

Benign

0.020

MetaRNN

Benign

0.41

T;T

MetaSVM

Benign

-0.83

MutationAssessor

Uncertain

2.5

M;.

MutationTaster

Benign

0.97

PrimateAI

Benign

0.27

PROVEAN

Benign

-2.2

N;.

REVEL

Benign

0.20

Sift

Benign

0.069

T;.

Sift4G

Benign

0.067

T;D

Polyphen

1.0

D;.

Vest4

0.27

MutPred

0.53

Loss of catalytic residue at R373 (P = 0.1301);Loss of catalytic residue at R373 (P = 0.1301);

MVP

0.46

ClinPred

0.18

GERP RS

1.7

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.8

Varity_R

0.11

gMVP

0.62

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.14

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over