Genetic Variant FFAR2:p.Ile16Thr (chr19-35449761-T-C) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_001370087.1(FFAR2):c.47T>C(p.Ile16Thr) variant causes a missense change. The variant allele was found at a frequency of 0.0000153 in 1,440,938 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/21 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. I16V) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.000015 ( 0 hom. )

Consequence

FFAR2
NM_001370087.1 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 5.15

Variant links:

Genes affected

FFAR2 (HGNC:4501): (free fatty acid receptor 2) This gene encodes a member of the GP40 family of G protein-coupled receptors that are clustered together on chromosome 19. The encoded protein is a receptor for short chain free fatty acids and may be involved in the inflammatory response and in regulating lipid plasma levels. [provided by RefSeq, Apr 2009]

FFAR2 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.1301488).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
FFAR2	NM_001370087.1 link	c.47T>C	p.Ile16Thr	missense_variant	Exon 2 of 2	ENST00000599180.3	NP_001357016.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
FFAR2	ENST00000599180.3 link	c.47T>C	p.Ile16Thr	missense_variant	Exon 2 of 2	1	NM_001370087.1	ENSP00000473159.1	O15552
FFAR2	ENST00000246549.2 link	c.47T>C	p.Ile16Thr	missense_variant	Exon 1 of 1	6		ENSP00000246549.2	O15552
FFAR2	ENST00000601590.1 link	n.17-1392T>C		intron_variant	Intron 1 of 1	5

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.0000434

AC:

AN:

230664

Hom.:

AF XY:

0.0000563

AC XY:

AN XY:

124350

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.000375

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000153

AC:

AN:

1440938

Hom.:

Cov.:

AF XY:

0.0000265

AC XY:

AN XY:

715660

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.000266

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

Bravo

AF:

0.00000378

ExAC

AF:

0.0000494

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

May 24, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.47T>C (p.I16T) alteration is located in exon 1 (coding exon 1) of the FFAR2 gene. This alteration results from a T to C substitution at nucleotide position 47, causing the isoleucine (I) at amino acid position 16 to be replaced by a threonine (T). 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

0.23

BayesDel_addAF

Benign

-0.36

BayesDel_noAF

Benign

-0.44

CADD

Benign

DANN

Benign

0.80

DEOGEN2

Benign

0.15

T;T

Eigen

Benign

-0.18

Eigen_PC

Benign

-0.17

FATHMM_MKL

Uncertain

0.94

LIST_S2

Benign

0.75

.;T

M_CAP

Benign

0.016

MetaRNN

Benign

0.13

T;T

MetaSVM

Benign

-0.99

MutationAssessor

Benign

1.6

L;L

PrimateAI

Benign

0.42

PROVEAN

Uncertain

-2.5

.;D

REVEL

Benign

0.12

Sift

Benign

0.084

.;T

Sift4G

Benign

0.092

T;T

Polyphen

0.35

B;B

Vest4

0.28

MutPred

0.47

Loss of stability (P = 0.007);Loss of stability (P = 0.007);

MVP

0.58

MPC

0.40

ClinPred

0.12

GERP RS

4.7

Varity_R

0.085

gMVP

0.33

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