17-82083876-C-T

Variant names:

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 0P and 2B. BP4_Moderate

The NM_004104.5(FASN):c.5114G>A(p.Arg1705Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00019 in 1,572,120 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts 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. R1705W) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000085 ( 0 hom., cov: 34)

Exomes 𝑓: 0.00020 ( 1 hom. )

Consequence

FASN
NM_004104.5 missense

Scores

Clinical Significance

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

Conservation

PhyloP100: 1.92

Publications

1 publications found

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 Gene-Disease associations (from GenCC):

neurodevelopmental disorder
Inheritance: AR Classification: LIMITED Submitted by: G2P

FASN links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -2 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.12872496).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
FASN	NM_004104.5 link	c.5114G>A	p.Arg1705Gln	missense_variant	Exon 30 of 43	ENST00000306749.4	NP_004095.4	P49327
FASN	XM_011523538.3 link	c.5114G>A	p.Arg1705Gln	missense_variant	Exon 30 of 43		XP_011521840.1	P49327

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
FASN	ENST00000306749.4 link	c.5114G>A	p.Arg1705Gln	missense_variant	Exon 30 of 43	1	NM_004104.5	ENSP00000304592.2		P49327
FASN	ENST00000634990.1 link	c.5108G>A	p.Arg1703Gln	missense_variant	Exon 30 of 43	5		ENSP00000488964.1		A0A0U1RQF0

Frequencies

GnomAD3 genomes

AF:

0.0000854

AC:

AN:

152260

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000723

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000132

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000991

AC:

AN:

181560

AF XY:

0.000114

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000384

Gnomad ASJ exome

AF:

0.000114

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000119

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000201

AC:

285

AN:

1419742

Hom.:

Cov.:

AF XY:

0.000202

AC XY:

142

AN XY:

702010

show subpopulations

African (AFR)

AF:

0.0000605

AC:

AN:

33048

American (AMR)

AF:

0.0000535

AC:

AN:

37350

Ashkenazi Jewish (ASJ)

AF:

0.0000395

AC:

AN:

25316

East Asian (EAS)

AF:

0.0000261

AC:

AN:

38242

South Asian (SAS)

AF:

0.000481

AC:

AN:

81054

European-Finnish (FIN)

AF:

0.00

AC:

AN:

49342

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5712

European-Non Finnish (NFE)

AF:

0.000218

AC:

238

AN:

1090740

Other (OTH)

AF:

0.0000339

AC:

AN:

58938

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.472

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

100

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.0000853

AC:

AN:

152378

Hom.:

Cov.:

AF XY:

0.0000403

AC XY:

AN XY:

74512

show subpopulations

African (AFR)

AF:

0.0000721

AC:

AN:

41590

American (AMR)

AF:

0.00

AC:

AN:

15312

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5190

South Asian (SAS)

AF:

0.000207

AC:

AN:

4834

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10630

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000132

AC:

AN:

68028

Other (OTH)

AF:

0.00

AC:

AN:

2116

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.479

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.000173

Hom.:

Bravo

AF:

0.0000793

TwinsUK

AF:

0.000539

AC:

ALSPAC

AF:

0.000259

AC:

ExAC

AF:

0.0000849

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

Dec 28, 2022

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.5114G>A (p.R1705Q) alteration is located in exon 30 (coding exon 29) of the FASN gene. This alteration results from a G to A substitution at nucleotide position 5114, causing the arginine (R) at amino acid position 1705 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

Jan 06, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change replaces arginine, which is basic and polar, with glutamine, which is neutral and polar, at codon 1705 of the FASN protein (p.Arg1705Gln). This variant is present in population databases (rs534878599, gnomAD 0.03%). 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: 531035). An algorithm developed to predict the effect of missense changes on protein structure and function outputs the following: PolyPhen-2: "Benign". The glutamine 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

0.070

BayesDel_addAF

Benign

-0.46

BayesDel_noAF

Benign

-0.60

CADD

Benign

(source)

DANN

Uncertain

0.99

DEOGEN2

Uncertain

0.43

T;.

Eigen

Benign

-0.27

Eigen_PC

Benign

-0.34

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Uncertain

0.89

D;D

M_CAP

Benign

0.044

MetaRNN

Benign

0.13

T;T

MetaSVM

Benign

-1.1

MutationAssessor

Uncertain

2.8

M;.

PhyloP100

1.9

PrimateAI

Uncertain

0.56

PROVEAN

Uncertain

-2.4

N;.

REVEL

Benign

0.17

Sift

Uncertain

0.024

D;.

Sift4G

Uncertain

0.033

D;D

Polyphen

0.58

P;.

Vest4

0.34

MVP

0.51

ClinPred

0.14

GERP RS

2.6

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.8

Varity_R

0.63

gMVP

0.70

Mutation Taster

=73/27

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.020

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over