3-65375945-C-A

Variant summary

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

The NM_001033057.2(MAGI1):c.2996G>T(p.Gly999Val) variant causes a missense, splice region change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. 1/1 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: MAGI1 NM_001033057.2 missense, splice_region
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.57

Genes affected

MAGI1 (HGNC:946): (membrane associated guanylate kinase, WW and PDZ domain containing 1) The protein encoded by this gene is a member of the membrane-associated guanylate kinase homologue (MAGUK) family. MAGUK proteins participate in the assembly of multiprotein complexes on the inner surface of the plasma membrane at regions of cell-cell contact. The product of this gene may play a role as scaffolding protein at cell-cell junctions. Alternatively spliced transcript variants encoding different isoforms have been identified. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
MAGI1	NM_001033057.2	c.2996G>T	p.Gly999Val	missense_variant, splice_region_variant	18/23	ENST00000402939.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
MAGI1	ENST00000402939.7	c.2996G>T	p.Gly999Val	missense_variant, splice_region_variant	18/23	1	NM_001033057.2	A2

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

Sep 12, 2023

The c.2996G>T (p.G999V) alteration is located in exon 18 (coding exon 18) of the MAGI1 gene. This alteration results from a G to T substitution at nucleotide position 2996, causing the glycine (G) at amino acid position 999 to be replaced by a valine (V). 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
BayesDel_addAF	Pathogenic	0.23	D
BayesDel_noAF	Uncertain	0.090
Cadd	Pathogenic	27
Dann	Uncertain	1.0
Eigen	Uncertain	0.64
Eigen_PC	Pathogenic	0.71
FATHMM_MKL	Pathogenic	1.0	D
M_CAP	Benign	0.039	D
MetaRNN	Uncertain	0.66	D;D;D;D;D;D;D
MetaSVM	Benign	-1.1	T
MutationTaster	Benign	1.0	D;D;D;D
PrimateAI	Pathogenic	0.87	D
PROVEAN	Benign	-2.2	N;.;.;N;D;D;D
REVEL	Uncertain	0.36
Sift	Uncertain	0.0070	D;.;.;D;D;D;D
Sift4G	Uncertain	0.051	T;D;D;D;T;T;T
Polyphen		0.35	B;.;.;D;.;D;.
Vest4		0.85
MutPred		0.50		Loss of disorder (P = 0.0793);.;.;.;.;.;.;
MVP		0.51
MPC		1.7
ClinPred		0.95	D
GERP RS		6.0
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
gMVP		0.73

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.17		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: chr3-65361620; COSMIC: COSV100441461; COSMIC: COSV100441461;