4-186555360-C-G

Position:

• chr4-186555360-C-G

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_005958.4(MTNR1A):​c.6G>C​(p.Gln2His) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: MTNR1A NM_005958.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.239

Genes affected

MTNR1A (HGNC:7463): (melatonin receptor 1A) This gene encodes one of two high affinity forms of a receptor for melatonin, the primary hormone secreted by the pineal gland. This receptor is a G-protein coupled, 7-transmembrane receptor that is responsible for melatonin effects on mammalian circadian rhythm and reproductive alterations affected by day length. The receptor is an integral membrane protein that is readily detectable and localized to two specific regions of the brain. The hypothalamic suprachiasmatic nucleus appears to be involved in circadian rhythm while the hypophysial pars tuberalis may be responsible for the reproductive effects of melatonin. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.116556436).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
MTNR1A	NM_005958.4	c.6G>C	p.Gln2His	missense_variant	1/2	ENST00000307161.5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
MTNR1A	ENST00000307161.5	c.6G>C	p.Gln2His	missense_variant	1/2	1	NM_005958.4	P1
MTNR1A	ENST00000703170.1	c.6G>C	p.Gln2His	missense_variant	1/2			P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

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

Oct 12, 2021

The c.6G>C (p.Q2H) alteration is located in exon 1 (coding exon 1) of the MTNR1A gene. This alteration results from a G to C substitution at nucleotide position 6, causing the glutamine (Q) at amino acid position 2 to be replaced by a histidine (H). 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	Benign	0.16
BayesDel_addAF	Benign	-0.21	T
BayesDel_noAF	Benign	-0.54
CADD	Benign	1.7
DANN	Benign	0.75
DEOGEN2	Benign	0.073	T
Eigen	Benign	-1.3
Eigen_PC	Benign	-1.3
FATHMM_MKL	Benign	0.083	N
LIST_S2	Benign	0.22	T
M_CAP	Uncertain	0.24	D
MetaRNN	Benign	0.12	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	0.69	N
MutationTaster	Benign	1.0	N
PrimateAI	Uncertain	0.64	T
PROVEAN	Benign	-0.25	N
REVEL	Benign	0.070
Sift	Benign	0.11	T
Sift4G	Benign	0.10	T
Polyphen		0.010	B
Vest4		0.059
MutPred		0.15		Loss of glycosylation at S6 (P = 0.029);
MVP		0.56
MPC		0.24
ClinPred		0.093	T
GERP RS		0.52
Varity_R		0.043
gMVP		0.48

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: chr4-187476514;