Genetic Variant NM_000844.4:c.736+24331T>C (chr3-7170999-T-C) – ACMG Classification: Benign (-12 pts)

Variant summary

Our verdict is Benign. The variant received -12 ACMG points: 0P and 12B. BP4_StrongBA1

The NM_000844.4(GRM7):c.736+24331T>C variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.355 in 152,004 control chromosomes in the GnomAD database, including 10,371 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: 𝑓 0.36 ( 10371 hom., cov: 32)

Consequence

GRM7
NM_000844.4 intron

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: -0.772

Publications

6 publications found

Variant links:

Genes affected

GRM7 (HGNC:4599): (glutamate metabotropic receptor 7) L-glutamate is the major excitatory neurotransmitter in the central nervous system, and it activates both ionotropic and metabotropic glutamate receptors. Glutamatergic neurotransmission is involved in most aspects of normal brain function and can be perturbed in many neuropathologic conditions. The metabotropic glutamate receptors are a family of G protein-coupled receptors that have been divided into three groups on the basis of sequence homology, putative signal transduction mechanisms, and pharmacologic properties. Group I includes GRM1 and GRM5, and these receptors have been shown to activate phospholipase C. Group II includes GRM2 and GRM3, while Group III includes GRM4, GRM6, GRM7 and GRM8. Group II and III receptors are linked to the inhibition of the cyclic AMP cascade but differ in their agonist selectivities. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jun 2009]

GRM7 Gene-Disease associations (from GenCC):

neurodevelopmental disorder with seizures, hypotonia, and brain imaging abnormalities
Inheritance: AR Classification: STRONG, MODERATE Submitted by: G2P, Labcorp Genetics (formerly Invitae), Ambry Genetics

GRM7 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -12 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.9).

BA1

GnomAd4 highest subpopulation (EAS) allele frequency at 95% confidence interval = 0.553 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
GRM7	NM_000844.4 link	c.736+24331T>C		intron_variant	Intron 2 of 9	ENST00000357716.9	NP_000835.1	Q14831-1B2R693Q59G95

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
GRM7	ENST00000357716.9 link	c.736+24331T>C		intron_variant	Intron 2 of 9	1	NM_000844.4	ENSP00000350348.4		Q14831-1
GRM7	ENST00000440923.7 link	n.736+24331T>C		intron_variant	Intron 2 of 11	2		ENSP00000412329.3		H7C3K2

Frequencies

GnomAD3 genomes

AF:

0.355

AC:

53934

AN:

151884

Hom.:

10360

Cov.:

show subpopulations

Gnomad AFR

AF:

0.232

Gnomad AMI

AF:

0.423

Gnomad AMR

AF:

0.524

Gnomad ASJ

AF:

0.354

Gnomad EAS

AF:

0.570

Gnomad SAS

AF:

0.442

Gnomad FIN

AF:

0.324

Gnomad MID

AF:

0.357

Gnomad NFE

AF:

0.373

Gnomad OTH

AF:

0.375

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome

AF:

0.355

AC:

53968

AN:

152004

Hom.:

10371

Cov.:

AF XY:

0.358

AC XY:

26624

AN XY:

74302

show subpopulations

African (AFR)

AF:

0.233

AC:

9652

AN:

41460

American (AMR)

AF:

0.524

AC:

8005

AN:

15274

Ashkenazi Jewish (ASJ)

AF:

0.354

AC:

1228

AN:

3468

East Asian (EAS)

AF:

0.570

AC:

2930

AN:

5138

South Asian (SAS)

AF:

0.441

AC:

2125

AN:

4816

European-Finnish (FIN)

AF:

0.324

AC:

3424

AN:

10576

Middle Eastern (MID)

AF:

0.364

AC:

107

AN:

294

European-Non Finnish (NFE)

AF:

0.373

AC:

25324

AN:

67960

Other (OTH)

AF:

0.374

AC:

789

AN:

2110

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.506

Heterozygous variant carriers

1761

3522

5284

7045

8806

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

Variant carriers

528

1056

1584

2112

2640

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.357

Hom.:

2223

Bravo

AF:

0.366

Asia WGS

AF:

0.466

AC:

1619

AN:

3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.90

CADD

Benign

1.5

(source)

DANN

Benign

0.84

PhyloP100

-0.77

Mutation Taster

=100/0

polymorphism (auto)

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over