Genetic Variant MCHR1:p.Ser26Leu (chr22-40679729-C-T) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_005297.4(MCHR1):c.77C>T(p.Ser26Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000606 in 1,614,112 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00037 ( 0 hom., cov: 31)

Exomes 𝑓: 0.00063 ( 1 hom. )

Consequence

MCHR1
NM_005297.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -0.788

Variant links:

Genes affected

MCHR1 (HGNC:4479): (melanin concentrating hormone receptor 1) The protein encoded by this gene, a member of the G protein-coupled receptor family 1, is an integral plasma membrane protein which binds melanin-concentrating hormone. The encoded protein can inhibit cAMP accumulation and stimulate intracellular calcium flux, and is probably involved in the neuronal regulation of food consumption. Although structurally similar to somatostatin receptors, this protein does not seem to bind somatostatin. [provided by RefSeq, Jul 2008]

MCHR1 links:

ENSG00000289292 (HGNC:):

ENSG00000289292 links:

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ACMG classification

Classification made for transcript

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=0.01706615).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MCHR1	NM_005297.4 link	c.77C>T	p.Ser26Leu	missense_variant	Exon 1 of 2	ENST00000249016.5	NP_005288.4	Q99705
LOC124905123	XR_007068109.1 link	n.4323+879G>A		intron_variant	Intron 1 of 1
LOC124905123	XR_007068110.1 link	n.358+879G>A		intron_variant	Intron 2 of 2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
MCHR1	ENST00000249016.5 link	c.77C>T	p.Ser26Leu	missense_variant	Exon 1 of 2	1	NM_005297.4	ENSP00000249016.5	Q99705
MCHR1	ENST00000381433.3 link	c.77C>T	p.Ser26Leu	missense_variant	Exon 1 of 3	1		ENSP00000370841.3	A6ZJ87
MCHR1	ENST00000498400.1 link	n.132+325C>T		intron_variant	Intron 1 of 1	1
ENSG00000289292	ENST00000688408.2 link	n.367+879G>A		intron_variant	Intron 2 of 2

Frequencies

GnomAD3 genomes

AF:

0.000375

AC:

AN:

152132

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000145

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000196

Gnomad ASJ

AF:

0.000576

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000662

Gnomad OTH

AF:

0.000479

GnomAD3 exomes

AF:

0.000362

AC:

AN:

248608

Hom.:

AF XY:

0.000334

AC XY:

AN XY:

134772

show subpopulations

Gnomad AFR exome

AF:

0.0000622

Gnomad AMR exome

AF:

0.000145

Gnomad ASJ exome

AF:

0.000994

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000327

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000639

Gnomad OTH exome

AF:

0.000328

GnomAD4 exome

AF:

0.000630

AC:

921

AN:

1461862

Hom.:

Cov.:

AF XY:

0.000613

AC XY:

446

AN XY:

727236

show subpopulations

Gnomad4 AFR exome

AF:

0.0000597

Gnomad4 AMR exome

AF:

0.000157

Gnomad4 ASJ exome

AF:

0.000957

Gnomad4 EAS exome

AF:

0.0000252

Gnomad4 SAS exome

AF:

0.0000464

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000755

Gnomad4 OTH exome

AF:

0.000662

GnomAD4 genome

AF:

0.000374

AC:

AN:

152250

Hom.:

Cov.:

AF XY:

0.000363

AC XY:

AN XY:

74450

show subpopulations

Gnomad4 AFR

AF:

0.000144

Gnomad4 AMR

AF:

0.000196

Gnomad4 ASJ

AF:

0.000576

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000662

Gnomad4 OTH

AF:

0.000474

Alfa

AF:

0.000664

Hom.:

Bravo

AF:

0.000476

TwinsUK

AF:

0.00

AC:

ALSPAC

AF:

0.00156

AC:

ESP6500AA

AF:

0.000227

AC:

ESP6500EA

AF:

0.000698

AC:

ExAC

AF:

0.000436

AC:

EpiCase

AF:

0.000382

EpiControl

AF:

0.000533

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Jul 06, 2021

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.284C>T (p.S95L) alteration is located in exon 1 (coding exon 1) of the MCHR1 gene. This alteration results from a C to T substitution at nucleotide position 284, causing the serine (S) at amino acid position 95 to be replaced by a leucine (L). 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

0.076

BayesDel_addAF

Benign

-0.37

BayesDel_noAF

Benign

-0.32

CADD

Benign

0.90

DANN

Benign

0.95

DEOGEN2

Benign

0.14

T;.

Eigen

Benign

-1.1

Eigen_PC

Benign

-1.2

FATHMM_MKL

Benign

0.028

LIST_S2

Benign

0.68

T;T

M_CAP

Benign

0.023

MetaRNN

Benign

0.017

T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

0.0

N;.

PrimateAI

Benign

0.42

PROVEAN

Benign

-1.1

N;N

REVEL

Benign

0.086

Sift

Benign

0.27

T;D

Sift4G

Benign

0.46

T;D

Polyphen

0.0

B;.

Vest4

0.039

MVP

0.48

MPC

0.11

ClinPred

0.032

GERP RS

-2.3

Varity_R

0.052

gMVP

0.33

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over