chr2-218262852-G-A

Variant names:

• chr2-218262852-G-A
• rs907641202
• NM_170699.3:c.128G>A

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 2P and 1B. PM2 BP4

The NM_170699.3(GPBAR1):​c.128G>A​(p.Arg43His) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000136 in 1,613,476 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

• Frequency:
  • Genomes: 𝑓 0.000020 (0 hom., cov: 32)
  • Exomes 𝑓: 0.000013 (0 hom.)
• Consequence: GPBAR1 NM_170699.3 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:2
• Conservation: PhyloP100: 2.53
• Publications: 1 publications found

Genes affected

GPBAR1 (HGNC:19680): (G protein-coupled bile acid receptor 1) This gene encodes a member of the G protein-coupled receptor (GPCR) superfamily. This enzyme functions as a cell surface receptor for bile acids. Treatment of cells expressing this GPCR with bile acids induces the production of intracellular cAMP, activation of a MAP kinase signaling pathway, and internalization of the receptor. The receptor is implicated in the suppression of macrophage functions and regulation of energy homeostasis by bile acids. Alternative splicing results in multiple transcript variants encoding the same protein. [provided by RefSeq, Jul 2008]

ACMG classification

Our verdict: Uncertain_significance. The variant received 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.3148865).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_170699.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	GPBAR1	NM_170699.3	MANE Select	c.128G>A	p.Arg43His	missense	Exon 2 of 2	NP_733800.1	Q8TDU6
	GPBAR1	NM_001077191.2		c.128G>A	p.Arg43His	missense	Exon 2 of 2	NP_001070659.1	Q8TDU6
	GPBAR1	NM_001077194.2		c.128G>A	p.Arg43His	missense	Exon 2 of 2	NP_001070662.1	Q8TDU6

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	GPBAR1	ENST00000519574.2	TSL:1 MANE Select	c.128G>A	p.Arg43His	missense	Exon 2 of 2	ENSP00000430202.1	Q8TDU6
	GPBAR1	ENST00000479077.5	TSL:2	c.128G>A	p.Arg43His	missense	Exon 2 of 2	ENSP00000430698.1	Q8TDU6
	GPBAR1	ENST00000521462.1	TSL:2	c.128G>A	p.Arg43His	missense	Exon 2 of 2	ENSP00000428824.1	Q8TDU6

Frequencies

GnomAD3 genomes AF: 0.0000197 AC: 3 AN: 152152 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0000654

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.000193

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000147

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.0000202 AC: 5 AN: 247508 AF XY: 0.00

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000581

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.000112

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000130 AC: 19 AN: 1461324 Hom.: 0 Cov.: 31 AF XY: 0.00000963 AC XY: 7 AN XY: 726952

African (AFR) AF: 0.0000597 AC: 2 AN: 33476

American (AMR) AF: 0.0000448 AC: 2 AN: 44682

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26106

East Asian (EAS) AF: 0.000126 AC: 5 AN: 39694

South Asian (SAS) AF: 0.00 AC: 0 AN: 86208

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53270

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5766

European-Non Finnish (NFE) AF: 0.00000810 AC: 9 AN: 1111776

Other (OTH) AF: 0.0000166 AC: 1 AN: 60346

GnomAD4 genome AF: 0.0000197 AC: 3 AN: 152152 Hom.: 0 Cov.: 32 AF XY: 0.0000404 AC XY: 3 AN XY: 74312

African (AFR) AF: 0.00 AC: 0 AN: 41424

American (AMR) AF: 0.0000654 AC: 1 AN: 15282

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3472

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

South Asian (SAS) AF: 0.00 AC: 0 AN: 4832

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10618

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 316

European-Non Finnish (NFE) AF: 0.0000147 AC: 1 AN: 68032

Other (OTH) AF: 0.00 AC: 0 AN: 2090

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.0000151

Asia WGS AF: 0.000577 AC: 2 AN: 3478

EpiCase AF: 0.0000545

EpiControl AF: 0.00

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
-	1	-	GPBAR1-related disorder (1)
-	1	-	not specified (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.074
BayesDel_addAF	Benign	-0.38	T
BayesDel_noAF	Benign	-0.61
CADD	Benign	21
DANN	Benign	0.97
DEOGEN2	Uncertain	0.45	T
Eigen	Benign	-0.54
Eigen_PC	Benign	-0.51
FATHMM_MKL	Benign	0.73	D
LIST_S2	Benign	0.72	T
M_CAP	Benign	0.0079	T
MetaRNN	Benign	0.31	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	1.2	L
PhyloP100		2.5
PrimateAI	Benign	0.46	T
PROVEAN	Uncertain	-3.5	D
REVEL	Benign	0.083
Sift	Benign	0.13	T
Sift4G	Pathogenic	0.0	D
Polyphen		0.096	B
Vest4		0.26
MutPred		0.77		Gain of catalytic residue at L45 (P = 0.0942)
MVP		0.32
MPC		0.055
ClinPred		0.18	T
GERP RS		1.0
Varity_R		0.28
gMVP		0.31
Mutation Taster		=94/6	polymorphism

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: rs907641202; hg19: chr2-219127575; COSMIC: COSV99946170; COSMIC: COSV99946170;