chr17-82085706-C-T

Position:

chr17-82085706-C-T

Variant summary

Our verdict is Benign. Variant got -8 ACMG points: 0P and 8B. BP4_StrongBS2

The NM_004104.5(FASN):c.3898G>A(p.Ala1300Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000198 in 1,566,750 control chromosomes in the GnomAD database, with no homozygous occurrence. 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 (★).

Frequency

Genomes: 𝑓 0.000033 ( 0 hom., cov: 34)

Exomes 𝑓: 0.000018 ( 0 hom. )

Consequence

FASN
NM_004104.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -1.87

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 Benign. Variant got -8 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.034638464).

BS2

High AC in GnomAd4 at 5 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
FASN	NM_004104.5 link	c.3898G>A	p.Ala1300Thr	missense_variant	23/43	ENST00000306749.4	NP_004095.4	P49327
FASN	XM_011523538.3 link	c.3898G>A	p.Ala1300Thr	missense_variant	23/43		XP_011521840.1	P49327

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	UniProt
FASN	ENST00000306749.4 link	c.3898G>A	p.Ala1300Thr	missense_variant	23/43	1	NM_004104.5	ENSP00000304592.2	P49327
FASN	ENST00000634990.1 link	c.3892G>A	p.Ala1298Thr	missense_variant	23/43	5		ENSP00000488964.1	A0A0U1RQF0
FASN	ENST00000579410.1 link	n.-46G>A		upstream_gene_variant		2

Frequencies

GnomAD3 genomes

AF:

0.0000329

AC:

AN:

152182

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000483

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:

0.0000441

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000237

AC:

AN:

169064

Hom.:

AF XY:

0.0000328

AC XY:

AN XY:

91468

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000756

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000293

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000184

AC:

AN:

1414568

Hom.:

Cov.:

AF XY:

0.0000243

AC XY:

AN XY:

699656

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000528

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000248

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000184

Gnomad4 OTH exome

AF:

0.0000171

GnomAD4 genome

AF:

0.0000329

AC:

AN:

152182

Hom.:

Cov.:

AF XY:

0.0000404

AC XY:

AN XY:

74340

show subpopulations

Gnomad4 AFR

AF:

0.0000483

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:

0.0000441

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000130

Hom.:

Bravo

AF:

0.0000264

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

Apr 28, 2022

This sequence change replaces alanine, which is neutral and non-polar, with threonine, which is neutral and polar, at codon 1300 of the FASN protein (p.Ala1300Thr). The frequency data for this variant in the population databases is considered unreliable, as metrics indicate poor data quality at this position in the gnomAD database. 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: 531033). Algorithms developed to predict the effect of missense changes on protein structure and function output the following: SIFT: "Tolerated"; PolyPhen-2: "Benign"; Align-GVGD: "Class C0". The threonine amino acid residue is found in multiple mammalian species, which suggests that this missense change does not adversely affect protein function. 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

0.075

BayesDel_addAF

Benign

-0.43

BayesDel_noAF

Benign

-0.86

CADD

Benign

0.0070

DANN

Benign

0.71

DEOGEN2

Benign

0.25

T;.

Eigen

Benign

-2.1

Eigen_PC

Benign

-2.2

FATHMM_MKL

Benign

0.47

LIST_S2

Benign

0.14

T;T

M_CAP

Benign

0.0021

MetaRNN

Benign

0.035

T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

0.82

L;.

PrimateAI

Benign

0.29

PROVEAN

Benign

-0.28

N;.

REVEL

Benign

0.010

Sift

Benign

0.61

T;.

Sift4G

Benign

0.60

T;T

Polyphen

0.0060

B;.

Vest4

0.054

MutPred

0.23

Gain of glycosylation at A1300 (P = 0.0071);.;

MVP

0.35

ClinPred

0.038

GERP RS

-9.8

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.2

Varity_R

0.042

gMVP

0.30

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