rs774371652

Positions:

chr17-82095379-G-A

Variant summary

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

The NM_004104.5(FASN):c.221C>T(p.Thr74Met) variant causes a missense change. The variant allele was found at a frequency of 0.0000093 in 1,612,876 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 34)

Exomes 𝑓: 0.0000096 ( 0 hom. )

Consequence

FASN
NM_004104.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 5.37

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=0.326356).

BS2

High AC in GnomAdExome4 at 14 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
FASN	NM_004104.5 linkuse as main transcript	c.221C>T	p.Thr74Met	missense_variant	3/43	ENST00000306749.4	NP_004095.4
FASN	XM_011523538.3 linkuse as main transcript	c.221C>T	p.Thr74Met	missense_variant	3/43		XP_011521840.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris
FASN	ENST00000306749.4 linkuse as main transcript	c.221C>T	p.Thr74Met	missense_variant	3/43	1	NM_004104.5	ENSP00000304592	P1
FASN	ENST00000634990.1 linkuse as main transcript	c.221C>T	p.Thr74Met	missense_variant	3/43	5		ENSP00000488964
FASN	ENST00000635197.1 linkuse as main transcript	c.221C>T	p.Thr74Met	missense_variant	3/4	3		ENSP00000489514
FASN	ENST00000637525.1 linkuse as main transcript			upstream_gene_variant		5

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152266

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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:

0.0000120

AC:

AN:

249974

Hom.:

AF XY:

0.0000147

AC XY:

AN XY:

135670

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000109

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000888

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000959

AC:

AN:

1460610

Hom.:

Cov.:

AF XY:

0.00000963

AC XY:

AN XY:

726604

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000504

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000899

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152266

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74400

show subpopulations

Gnomad4 AFR

AF:

0.0000241

Gnomad4 AMR

AF:

0.00

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

ExAC

AF:

0.00000825

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Epileptic encephalopathy

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jul 06, 2022

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. Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Probably Damaging"; Align-GVGD: "Class C0"). ClinVar contains an entry for this variant (Variation ID: 566082). This variant has not been reported in the literature in individuals affected with FASN-related conditions. This variant is present in population databases (rs774371652, gnomAD 0.01%). This sequence change replaces threonine, which is neutral and polar, with methionine, which is neutral and non-polar, at codon 74 of the FASN protein (p.Thr74Met). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.11

BayesDel_addAF

Benign

-0.30

BayesDel_noAF

Benign

-0.44

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.42

T;.;T

Eigen

Uncertain

0.19

Eigen_PC

Benign

0.081

FATHMM_MKL

Uncertain

0.96

LIST_S2

Uncertain

0.91

D;D;D

M_CAP

Benign

0.018

MetaRNN

Benign

0.33

T;T;T

MetaSVM

Benign

-1.1

MutationAssessor

Benign

0.56

N;.;.

MutationTaster

Benign

1.0

PrimateAI

Uncertain

0.56

PROVEAN

Uncertain

-2.6

D;.;.

REVEL

Benign

0.20

Sift

Benign

0.11

T;.;.

Sift4G

Benign

0.22

T;T;.

Polyphen

1.0

D;.;.

Vest4

0.54

MutPred

0.35

Loss of glycosylation at T74 (P = 0.0742);Loss of glycosylation at T74 (P = 0.0742);Loss of glycosylation at T74 (P = 0.0742);

MVP

0.56

ClinPred

0.74

GERP RS

2.9

Varity_R

0.15

gMVP

0.72

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

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