chr11-92969729-T-G

Position:

• chr11-92969729-T-G

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_005959.5(MTNR1B):​c.4T>G​(p.Ser2Ala) 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. 15/21 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: MTNR1B NM_005959.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.293

Genes affected

MTNR1B (HGNC:7464): (melatonin receptor 1B) This gene encodes one of two high affinity forms of a receptor for melatonin, the primary hormone secreted by the pineal gland. This gene product is an integral membrane protein that is a G-protein coupled, 7-transmembrane receptor. It is found primarily in the retina and brain although this detection requires RT-PCR. It is thought to participate in light-dependent functions in the retina and may be involved in the neurobiological effects of melatonin. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Likely_benign. Variant got -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.066168785).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
MTNR1B	NM_005959.5	c.4T>G	p.Ser2Ala	missense_variant	1/2	ENST00000257068.3	NP_005950.1
MTNR1B	XM_011542839.3	c.4T>G	p.Ser2Ala	missense_variant	1/3		XP_011541141.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
MTNR1B	ENST00000257068.3	c.4T>G	p.Ser2Ala	missense_variant	1/2	1	NM_005959.5	ENSP00000257068.2
MTNR1B	ENST00000532482.1	n.4T>G		non_coding_transcript_exon_variant	1/3	5		ENSP00000436101.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 1325318 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 651246

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: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

Alfa AF: 0.0000712 Hom.: 0

Bravo AF: 0.00000378

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

Nov 27, 2024

The c.4T>G (p.S2A) alteration is located in exon 1 (coding exon 1) of the MTNR1B gene. This alteration results from a T to G substitution at nucleotide position 4, causing the serine (S) at amino acid position 2 to be replaced by an alanine (A). 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	0.074
BayesDel_addAF	Benign	-0.15	T
BayesDel_noAF	Benign	-0.46
CADD	Benign	4.2
DANN	Benign	0.56
DEOGEN2	Benign	0.061	T
Eigen	Benign	-1.1
Eigen_PC	Benign	-1.1
FATHMM_MKL	Benign	0.074	N
LIST_S2	Benign	0.24	T
M_CAP	Benign	0.022	T
MetaRNN	Benign	0.066	T
MetaSVM	Benign	-0.96	T
MutationAssessor	Benign	0.76	N
PrimateAI	Uncertain	0.55	T
PROVEAN	Benign	0.010	N
REVEL	Benign	0.094
Sift	Benign	1.0	T
Sift4G	Benign	1.0	T
Polyphen		0.0090	B
Vest4		0.12
MutPred		0.16		Loss of phosphorylation at S2 (P = 0.0959);
MVP		0.66
MPC		0.13
ClinPred		0.035	T
GERP RS		1.2
Varity_R		0.038
gMVP		0.34

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: rs1429061866; hg19: chr11-92702895;