Genetic Variant GPR139:p.Cys156Tyr (chr16-20032330-C-T) – ACMG Classification: Uncertain_significance (4 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PM2PP3_Moderate

The NM_001002911.4(GPR139):c.467G>A(p.Cys156Tyr) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,461,894 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. C156F) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000014 ( 0 hom. )

Consequence

GPR139
NM_001002911.4 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 7.38

Publications

0 publications found

Variant links:

Genes affected

GPR139 (HGNC:19995): (G protein-coupled receptor 139) This gene encodes a member of the rhodopsin family of G-protein-coupled receptors. The encoded protein is almost exclusively expressed in the central nervous system. L-tryptophan and L-phenylalanine may act as the physiologic ligands of the encoded protein. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jan 2016]

GPR139 links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.874

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001002911.4. 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
	GPR139	NM_001002911.4	MANE Select	c.467G>A	p.Cys156Tyr	missense	Exon 2 of 2	NP_001002911.1	Q6DWJ6
	GPR139	NM_001318483.1		c.188G>A	p.Cys63Tyr	missense	Exon 3 of 3	NP_001305412.1	Q6DWJ6

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
GPR139	ENST00000570682.2	TSL:1 MANE Select	c.467G>A	p.Cys156Tyr	missense	Exon 2 of 2	ENSP00000458791.2	Q6DWJ6
GPR139	ENST00000326571.7	TSL:1	n.*413G>A		non_coding_transcript_exon	Exon 3 of 3	ENSP00000370779.5	J3KPI8
GPR139	ENST00000326571.7	TSL:1	n.*413G>A		3_prime_UTR	Exon 3 of 3	ENSP00000370779.5	J3KPI8

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.00000137

AC:

AN:

1461894

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

727248

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33480

American (AMR)

AF:

0.00

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.00

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53420

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

8.99e-7

AC:

AN:

1112012

Other (OTH)

AF:

0.0000166

AC:

AN:

60396

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.450

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome 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

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

1.0

BayesDel_addAF

Pathogenic

0.25

BayesDel_noAF

Uncertain

0.12

CADD

Pathogenic

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.31

Eigen

Pathogenic

0.74

Eigen_PC

Pathogenic

0.76

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Benign

0.84

M_CAP

Benign

0.036

MetaRNN

Pathogenic

0.87

MetaSVM

Benign

-0.35

MutationAssessor

Benign

2.0

PhyloP100

7.4

PrimateAI

Pathogenic

0.80

Sift4G

Uncertain

0.033

Polyphen

1.0

Vest4

0.94

MutPred

0.62

Loss of catalytic residue at I154 (P = 0.1017)

MVP

0.95

MPC

1.6

ClinPred

0.97

GERP RS

5.7

Varity_R

0.64

gMVP

0.97

Mutation Taster

=19/81

disease causing

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over