7-80188966-G-T

Position:

• chr7-80188966-G-T

Variant summary

Our verdict is Pathogenic. Variant got 10 ACMG points: 10P and 0B. PM1 PM2 PM5 PP3_Strong

The NM_002069.6(GNAI1):​c.134G>T​(p.Gly45Val) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. 12/21 in silico tools predict a damaging outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. G45D) has been classified as Likely pathogenic.

• Frequency: Genomes: not found (cov: 32)
• Consequence: GNAI1 NM_002069.6 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 8.12

Genes affected

GNAI1 (HGNC:4384): (G protein subunit alpha i1) Guanine nucleotide binding proteins are heterotrimeric signal-transducing molecules consisting of alpha, beta, and gamma subunits. The alpha subunit binds guanine nucleotide, can hydrolyze GTP, and can interact with other proteins. The protein encoded by this gene represents the alpha subunit of an inhibitory complex. The encoded protein is part of a complex that responds to beta-adrenergic signals by inhibiting adenylate cyclase. Two transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jan 2012]

ACMG classification

Verdict is Pathogenic. Variant got 10 ACMG points.

• PM1: In a binding_site (size 5) in uniprot entity GNAI1_HUMAN there are 5 pathogenic changes around while only 0 benign (100%) in NM_002069.6
• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr7-80188966-G-A is described in ClinVar as [Likely_pathogenic]. Clinvar id is 2498283.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.989

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
GNAI1	NM_002069.6	c.134G>T	p.Gly45Val	missense_variant	2/8	ENST00000649796.2
GNAI1	NM_001256414.2	c.-23G>T		5_prime_UTR_variant	2/8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
GNAI1	ENST00000649796.2	c.134G>T	p.Gly45Val	missense_variant	2/8		NM_002069.6	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 29

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

GNAI1-related disorder Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Daryl Scott Lab, Baylor College of Medicine

Jan 27, 2022

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.58	D
BayesDel_noAF	Pathogenic	0.60
CADD	Pathogenic	28
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.97	D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;.
Eigen	Pathogenic	1.1
Eigen_PC	Pathogenic	1.1
FATHMM_MKL	Pathogenic	1.0	D
M_CAP	Pathogenic	0.54	D
MetaRNN	Pathogenic	0.99	D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D
MetaSVM	Pathogenic	1.0	D
MutationAssessor	Pathogenic	4.7	H;H;H;H;H;H;H;H;H;H;H;H;H;H;H;.
MutationTaster	Benign	1.0	D;D
PrimateAI	Pathogenic	0.94	D
Polyphen		1.0	D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;.
Vest4		0.90
MutPred		0.94		Loss of ubiquitination at K46 (P = 0.0366);Loss of ubiquitination at K46 (P = 0.0366);Loss of ubiquitination at K46 (P = 0.0366);Loss of ubiquitination at K46 (P = 0.0366);Loss of ubiquitination at K46 (P = 0.0366);Loss of ubiquitination at K46 (P = 0.0366);Loss of ubiquitination at K46 (P = 0.0366);Loss of ubiquitination at K46 (P = 0.0366);Loss of ubiquitination at K46 (P = 0.0366);Loss of ubiquitination at K46 (P = 0.0366);Loss of ubiquitination at K46 (P = 0.0366);Loss of ubiquitination at K46 (P = 0.0366);Loss of ubiquitination at K46 (P = 0.0366);Loss of ubiquitination at K46 (P = 0.0366);Loss of ubiquitination at K46 (P = 0.0366);Loss of ubiquitination at K46 (P = 0.0366);
MVP		0.98
MPC		2.3
ClinPred		1.0	D
GERP RS		5.9
Varity_R		0.98
gMVP		0.98

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr7-79818282;