X-151176889-C-G

Position:

• chrX-151176889-C-G

Variant summary

Our verdict is Likely benign. Variant got -4 ACMG points: 0P and 4B. BS2

The NM_004224.3(GPR50):​c.168C>G​(p.Asn56Lys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000367 in 1,090,133 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 2 hemizygotes in GnomAD. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 23)
  • Exomes 𝑓: 0.0000037 (0 hom. 2 hem.)
• Consequence: GPR50 NM_004224.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 2.02

Genes affected

GPR50 (HGNC:4506): (G protein-coupled receptor 50) This gene product belongs to the G-protein coupled receptor 1 family. Even though this protein shares similarity with the melatonin receptors, it does not bind melatonin, however, it inhibits melatonin receptor 1A function through heterodimerization. Polymorphic variants of this gene have been associated with bipolar affective disorder in women. [provided by RefSeq, Jan 2010]

GPR50-AS1 (HGNC:40259): (GPR50 antisense RNA 1)

ACMG classification

Verdict is Likely_benign. Variant got -4 ACMG points.

• BS2: High Hemizygotes in GnomAdExome4 at 2 gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
GPR50	NM_004224.3	c.168C>G	p.Asn56Lys	missense_variant	1/2	ENST00000218316.4
GPR50-AS1	NR_135300.1	n.461-14G>C		splice_polypyrimidine_tract_variant, intron_variant, non_coding_transcript_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
GPR50	ENST00000218316.4	c.168C>G	p.Asn56Lys	missense_variant	1/2	1	NM_004224.3	P1
GPR50-AS1	ENST00000454196.1	n.461-14G>C		splice_polypyrimidine_tract_variant, intron_variant, non_coding_transcript_variant		2

Frequencies

GnomAD3 genomes Cov.: 23

GnomAD4 exome AF: 0.00000367 AC: 4 AN: 1090133 Hom.: 0 Cov.: 28 AF XY: 0.00000562 AC XY: 2 AN XY: 355973

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: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000478

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 23

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Mar 21, 2023

The c.168C>G (p.N56K) alteration is located in exon 1 (coding exon 1) of the GPR50 gene. This alteration results from a C to G substitution at nucleotide position 168, causing the asparagine (N) at amino acid position 56 to be replaced by a lysine (K). 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	Pathogenic	0.86
BayesDel_addAF	Benign	-0.13	T
BayesDel_noAF	Benign	-0.42
CADD	Benign	20
DANN	Benign	0.96
DEOGEN2	Uncertain	0.53	D
FATHMM_MKL	Uncertain	0.91	D
LIST_S2	Uncertain	0.93	D
M_CAP	Benign	0.084	D
MetaRNN	Uncertain	0.61	D
MetaSVM	Benign	-0.49	T
MutationAssessor	Uncertain	2.8	M
MutationTaster	Benign	0.91	N
PrimateAI	Uncertain	0.50	T
PROVEAN	Pathogenic	-4.5	D
REVEL	Benign	0.25
Sift	Uncertain	0.021	D
Sift4G	Uncertain	0.016	D
Polyphen		0.20	B
Vest4		0.51
MutPred		0.72		Gain of methylation at N56 (P = 0.0194);
MVP		0.97
MPC		0.22
ClinPred		0.82	D
GERP RS		3.5
Varity_R		0.33
gMVP		0.40

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

Other links and lift over

dbSNP: rs1246151000; hg19: chrX-150345361;