6-55174766-G-T

Position:

• chr6-55174766-G-T

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_001384272.1(HCRTR2):​c.179G>T​(p.Gly60Val) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 31)
• Consequence: HCRTR2 NM_001384272.1 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.31

Genes affected

HCRTR2 (HGNC:4849): (hypocretin receptor 2) The protein encoded by this gene is a G-protein coupled receptor involved in the regulation of feeding behavior. The encoded protein binds the hypothalamic neuropeptides orexin A and orexin B. A related gene (HCRTR1) encodes a G-protein coupled receptor that selectively binds orexin A. [provided by RefSeq, Jan 2009]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
HCRTR2	NM_001384272.1	c.179G>T	p.Gly60Val	missense_variant	1/7	ENST00000370862.4
HCRTR2	NM_001526.5	c.179G>T	p.Gly60Val	missense_variant	2/8
HCRTR2	XM_017010798.2	c.179G>T	p.Gly60Val	missense_variant	2/9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
HCRTR2	ENST00000370862.4	c.179G>T	p.Gly60Val	missense_variant	1/7	1	NM_001384272.1	P1
HCRTR2	ENST00000615358.4	c.179G>T	p.Gly60Val	missense_variant	2/8	1		P1

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 31

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

Feb 02, 2024

The c.179G>T (p.G60V) alteration is located in exon 1 (coding exon 1) of the HCRTR2 gene. This alteration results from a G to T substitution at nucleotide position 179, causing the glycine (G) at amino acid position 60 to be replaced by a valine (V). 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	Uncertain	0.41
BayesDel_addAF	Uncertain	0.070	D
BayesDel_noAF	Benign	-0.14
CADD	Uncertain	23
DANN	Uncertain	0.98
DEOGEN2	Benign	0.043	T;T
Eigen	Benign	-0.025
Eigen_PC	Benign	0.16
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Benign	0.84	T;.
M_CAP	Benign	0.028	D
MetaRNN	Uncertain	0.50	T;T
MetaSVM	Benign	-1.1	T
MutationAssessor	Uncertain	2.1	M;M
MutationTaster	Benign	1.0	D
PrimateAI	Pathogenic	0.81	D
Sift4G	Benign	0.30	T;T
Polyphen		0.016	B;B
Vest4		0.68
MutPred		0.40		Loss of catalytic residue at I62 (P = 0.1416);Loss of catalytic residue at I62 (P = 0.1416);
MVP		0.78
MPC		0.49
ClinPred		0.85	D
GERP RS		5.0
Varity_R		0.33
gMVP		0.70

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr6-55039564;