NM_001195755.2:c.761G>A

Variant names:

• chr10-93587284-G-A
• rs116454156
• NM_001195755.2:c.761G>A

Variant summary

Our verdict is Benign. The variant received -9 ACMG points: 0P and 9B. BP4_Strong BS1_Supporting BS2

The NM_001195755.2(FFAR4):​c.761G>A​(p.Arg254His) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0174 in 1,614,070 control chromosomes in the GnomAD database, including 393 homozygotes. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: 𝑓 0.014 (39 hom., cov: 31)
  • Exomes 𝑓: 0.018 (354 hom.)
• Consequence: FFAR4 NM_001195755.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1 O:1
• Conservation: PhyloP100: 1.75
• Publications: 62 publications found

Genes affected

FFAR4 (HGNC:19061): (free fatty acid receptor 4) This gene encodes a G protein-coupled receptor (GPR) which belongs to the rhodopsin family of GPRs. The encoded protein functions as a receptor for free fatty acids, including omega-3, and participates in suppressing anti-inflammatory responses and insulin sensitizing. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Feb 2012]

ACMG classification

Our verdict: Benign. The variant received -9 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.002275765).
• BS1: Variant frequency is greater than expected in population sas. GnomAd4 allele frequency = 0.0143 (2180/152256) while in subpopulation SAS AF = 0.0399 (192/4810). AF 95% confidence interval is 0.0353. There are 39 homozygotes in GnomAd4. There are 1061 alleles in the male GnomAd4 subpopulation. Median coverage is 31. This position passed quality control check. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting
• BS2: High Homozygotes in GnomAd4 at 39 AR gene

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001195755.2. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	FFAR4	NM_001195755.2	MANE Select	c.761G>A	p.Arg254His	missense	Exon 3 of 3	NP_001182684.1
	FFAR4	NM_181745.4		c.809G>A	p.Arg270His	missense	Exon 4 of 4	NP_859529.2

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	FFAR4	ENST00000371481.9	TSL:1 MANE Select	c.761G>A	p.Arg254His	missense	Exon 3 of 3	ENSP00000360536.5
	FFAR4	ENST00000371483.8	TSL:1	c.809G>A	p.Arg270His	missense	Exon 4 of 4	ENSP00000360538.4
	FFAR4	ENST00000604414.1	TSL:3	c.696+11065G>A		intron	N/A	ENSP00000474477.1

Frequencies

GnomAD3 genomes AF: 0.0143 AC: 2183 AN: 152138 Hom.: 39 Cov.: 31

Gnomad AFR AF: 0.00352

Gnomad AMI AF: 0.124

Gnomad AMR AF: 0.00772

Gnomad ASJ AF: 0.0701

Gnomad EAS AF: 0.000193

Gnomad SAS AF: 0.0403

Gnomad FIN AF: 0.0103

Gnomad MID AF: 0.0222

Gnomad NFE AF: 0.0181

Gnomad OTH AF: 0.00958

GnomAD2 exomes AF: 0.0183 AC: 4592 AN: 251378 AF XY: 0.0200

Gnomad AFR exome AF: 0.00314

Gnomad AMR exome AF: 0.00532

Gnomad ASJ exome AF: 0.0601

Gnomad EAS exome AF: 0.000109

Gnomad FIN exome AF: 0.0115

Gnomad NFE exome AF: 0.0207

Gnomad OTH exome AF: 0.0196

GnomAD4 exome AF: 0.0177 AC: 25835 AN: 1461814 Hom.: 354 Cov.: 33 AF XY: 0.0187 AC XY: 13563 AN XY: 727218

African (AFR) AF: 0.00248 AC: 83 AN: 33478

American (AMR) AF: 0.00610 AC: 273 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.0633 AC: 1653 AN: 26134

East Asian (EAS) AF: 0.0000252 AC: 1 AN: 39696

South Asian (SAS) AF: 0.0345 AC: 2974 AN: 86256

European-Finnish (FIN) AF: 0.0111 AC: 594 AN: 53416

Middle Eastern (MID) AF: 0.0253 AC: 146 AN: 5768

European-Non Finnish (NFE) AF: 0.0171 AC: 18975 AN: 1111946

Other (OTH) AF: 0.0188 AC: 1136 AN: 60396

GnomAD4 genome AF: 0.0143 AC: 2180 AN: 152256 Hom.: 39 Cov.: 31 AF XY: 0.0143 AC XY: 1061 AN XY: 74454

African (AFR) AF: 0.00351 AC: 146 AN: 41546

American (AMR) AF: 0.00771 AC: 118 AN: 15304

Ashkenazi Jewish (ASJ) AF: 0.0701 AC: 243 AN: 3468

East Asian (EAS) AF: 0.000193 AC: 1 AN: 5176

South Asian (SAS) AF: 0.0399 AC: 192 AN: 4810

European-Finnish (FIN) AF: 0.0103 AC: 109 AN: 10618

Middle Eastern (MID) AF: 0.0204 AC: 6 AN: 294

European-Non Finnish (NFE) AF: 0.0181 AC: 1232 AN: 68020

Other (OTH) AF: 0.00948 AC: 20 AN: 2110

Alfa AF: 0.0185 Hom.: 98

Bravo AF: 0.0133

TwinsUK AF: 0.0148 AC: 55

ALSPAC AF: 0.0145 AC: 56

ESP6500AA AF: 0.00477 AC: 21

ESP6500EA AF: 0.0174 AC: 150

ExAC AF: 0.0193 AC: 2342

Asia WGS AF: 0.0130 AC: 45 AN: 3478

EpiCase AF: 0.0192

EpiControl AF: 0.0212

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1 Other:1

Revision: criteria provided, single submitter

Submissions by phenotype

BODY MASS INDEX QUANTITATIVE TRAIT LOCUS 10 Uncertain:1 Other:1

Feb 19, 2012

OMIM

Significance: risk factor

Review Status: no assertion criteria provided

Collection Method: literature only

May 07, 2024

Clinical Genomics Laboratory, Washington University in St. Louis

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The FFAR4 c.761G>A (p.Arg254His) variant, also reported as NM_181745.4:c.809G>A (p.Arg270His), has been reported as a risk allele for obesity with an odds ratio of 1.62; 95% CI 1.31-2.00 (Ichimura A et al., PMID: 22343897) and a risk allele for pathologic ALT levels with an odds ratio of 3.2, 95% CI 1.3-8.0 (adjusted for age, sex, and BMI SDS) (Marzuillo P et al., PMID: 25250621). The highest population minor allele frequency in the population database genome aggregation database (v2.1.1) is 6.03% in the Ashkenazi Jewish population. This variant may increase risk for obesity and elevated ALT levels along with other genetic and environmental factors; based on available information and the ClinGen Low Penetrance/Risk Allele Working Group recommendations (Schmidt RJ et al., PMID: 38054408) this variant is classified as an uncertain risk allele.

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.11
BayesDel_addAF	Benign	-0.50	T
BayesDel_noAF	Benign	-0.47
CADD	Benign	23
DANN	Uncertain	1.0
DEOGEN2	Benign	0.051	T
Eigen	Benign	-0.028
Eigen_PC	Benign	0.091
FATHMM_MKL	Benign	0.54	D
LIST_S2	Benign	0.79	T
MetaRNN	Benign	0.0023	T
MetaSVM	Benign	-0.73	T
MutationAssessor	Benign	2.0	M
PhyloP100		1.8
PrimateAI	Benign	0.42	T
PROVEAN	Benign	-1.8	N
REVEL	Benign	0.20
Sift	Benign	0.053	T
Sift4G	Benign	0.15	T
Polyphen		0.070	B
Vest4		0.11
MPC		0.77
ClinPred		0.013	T
GERP RS		5.0
Varity_R		0.12
gMVP		0.62
Mutation Taster		=85/15	polymorphism (auto)

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

Other links and lift over

dbSNP: rs116454156; hg19: chr10-95347041; COSMIC: COSV65160232; COSMIC: COSV65160232;