3-6861473-G-A
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Variant summary
Our verdict is Likely benign. Variant got -3 ACMG points: 2P and 5B. PM2BP4_StrongBS1_Supporting
The NM_000844.4(GRM7):c.85G>A(p.Ala29Thr) variant causes a missense change. The variant allele was found at a frequency of 0.0000455 in 1,583,040 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).
Frequency
Genomes: 𝑓 0.00022 ( 0 hom., cov: 32)
Exomes 𝑓: 0.000027 ( 0 hom. )
Consequence
GRM7
NM_000844.4 missense
NM_000844.4 missense
Scores
3
16
Clinical Significance
Conservation
PhyloP100: 4.74
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]
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ACMG classification
Classification made for transcript
Verdict is Likely_benign. Variant got -3 ACMG points.
PM2
Very rare variant in population databases, with high coverage;
BP4
Computational evidence support a benign effect (MetaRNN=0.035922796).
BS1
Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.000217 (33/152192) while in subpopulation AFR AF= 0.00077 (32/41578). AF 95% confidence interval is 0.000559. There are 0 homozygotes in gnomad4. There are 15 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
GRM7 | NM_000844.4 | c.85G>A | p.Ala29Thr | missense_variant | 1/10 | ENST00000357716.9 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
GRM7 | ENST00000357716.9 | c.85G>A | p.Ala29Thr | missense_variant | 1/10 | 1 | NM_000844.4 | P1 |
Frequencies
GnomAD3 genomes AF: 0.000217 AC: 33AN: 152074Hom.: 0 Cov.: 32
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GnomAD3 exomes AF: 0.0000498 AC: 10AN: 200810Hom.: 0 AF XY: 0.0000633 AC XY: 7AN XY: 110650
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GnomAD4 exome AF: 0.0000273 AC: 39AN: 1430848Hom.: 0 Cov.: 35 AF XY: 0.0000267 AC XY: 19AN XY: 710670
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GnomAD4 genome AF: 0.000217 AC: 33AN: 152192Hom.: 0 Cov.: 32 AF XY: 0.000202 AC XY: 15AN XY: 74396
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ClinVar
Significance: Uncertain significance
Submissions summary: Uncertain:2
Revision: criteria provided, multiple submitters, no conflicts
LINK: link
Submissions by phenotype
not provided Uncertain:2
Uncertain significance, criteria provided, single submitter | clinical testing | Invitae | Aug 11, 2022 | This sequence change replaces alanine, which is neutral and non-polar, with threonine, which is neutral and polar, at codon 29 of the GRM7 protein (p.Ala29Thr). This variant is present in population databases (rs200656326, gnomAD 0.08%). This variant has not been reported in the literature in individuals affected with GRM7-related conditions. Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Benign"; Align-GVGD: "Class C0"). In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. - |
Uncertain significance, criteria provided, single submitter | clinical testing | GeneDx | Dec 27, 2022 | In silico analysis supports that this missense variant does not alter protein structure/function; Has not been previously published as pathogenic or benign to our knowledge - |
Computational scores
Source:
Name
Calibrated prediction
Score
Prediction
AlphaMissense
Benign
BayesDel_addAF
Benign
T
BayesDel_noAF
Benign
CADD
Benign
DANN
Benign
DEOGEN2
Benign
T;.;.
Eigen
Benign
Eigen_PC
Benign
FATHMM_MKL
Uncertain
D
LIST_S2
Benign
T;T;T
M_CAP
Uncertain
D
MetaRNN
Benign
T;T;T
MetaSVM
Benign
T
MutationAssessor
Benign
N;N;N
MutationTaster
Benign
N;N;N;N;N
PrimateAI
Uncertain
T
PROVEAN
Benign
N;N;N
REVEL
Benign
Sift
Benign
T;T;T
Sift4G
Benign
T;T;T
Polyphen
B;B;B
Vest4
MVP
MPC
ClinPred
T
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gMVP
Splicing
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SpliceAI score (max)
Details are displayed if max score is > 0.2
Find out detailed SpliceAI scores and Pangolin per-transcript scores at