rs12721454

chr7-80211023-C-T

Variant summary

Our verdict is Benign. Variant got -13 ACMG points: 0P and 13B. BP4_Moderate BP6_Moderate BP7 BA1

The NM_002069.6(GNAI1):c.645C>T(p.Phe215=) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0109 in 1,612,860 control chromosomes in the GnomAD database, including 1,729 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★).

• Frequency:
  • Genomes: 𝑓 0.059 (912 hom., cov: 32)
  • Exomes 𝑓: 0.0059 (817 hom.)
• Consequence: GNAI1 NM_002069.6 synonymous
• Clinical Significance: Benign criteria provided, single submitter B:1
• Conservation: PhyloP100: -0.378

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 Benign. Variant got -13 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.35).
• BP6: Variant 7-80211023-C-T is Benign according to our data. Variant chr7-80211023-C-T is described in ClinVar as [Benign]. Clinvar id is 3056616.Status of the report is criteria_provided_single_submitter, 1 stars.
• BP7: Synonymous conserved (PhyloP=-0.378 with no splicing effect.
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.201 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
GNAI1	NM_002069.6	c.645C>T	p.Phe215=	synonymous_variant	6/8	ENST00000649796.2
GNAI1	NM_001256414.2	c.489C>T	p.Phe163=	synonymous_variant	6/8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
GNAI1	ENST00000649796.2	c.645C>T	p.Phe215=	synonymous_variant	6/8		NM_002069.6	P1

Frequencies

GnomAD3 genomes AF: 0.0585 AC: 8901 AN: 152064 Hom.: 909 Cov.: 32

Gnomad AFR AF: 0.205

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0202

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.000193

Gnomad SAS AF: 0.000828

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.0127

Gnomad NFE AF: 0.000470

Gnomad OTH AF: 0.0378

GnomAD3 exomes AF: 0.0154 AC: 3882 AN: 251294 Hom.: 395 AF XY: 0.0119 AC XY: 1616 AN XY: 135814

Gnomad AFR exome AF: 0.212

Gnomad AMR exome AF: 0.00986

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.000359

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.000458

Gnomad OTH exome AF: 0.00636

GnomAD4 exome AF: 0.00593 AC: 8662 AN: 1460678 Hom.: 817 Cov.: 29 AF XY: 0.00513 AC XY: 3729 AN XY: 726756

Gnomad4 AFR exome AF: 0.213

Gnomad4 AMR exome AF: 0.0115

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.000278

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.000182

Gnomad4 OTH exome AF: 0.0127

GnomAD4 genome AF: 0.0586 AC: 8915 AN: 152182 Hom.: 912 Cov.: 32 AF XY: 0.0570 AC XY: 4243 AN XY: 74408

Gnomad4 AFR AF: 0.205

Gnomad4 AMR AF: 0.0202

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.000193

Gnomad4 SAS AF: 0.000622

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.000470

Gnomad4 OTH AF: 0.0374

Alfa AF: 0.0291 Hom.: 215

Bravo AF: 0.0676

Asia WGS AF: 0.00982 AC: 34 AN: 3478

EpiCase AF: 0.000600

EpiControl AF: 0.000593

ClinVar

Significance: Benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

GNAI1-related disorder Benign:1

Benign, criteria provided, single submitter

clinical testing

PreventionGenetics, part of Exact Sciences

Dec 23, 2019

This variant is classified as benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.35
Cadd	Benign	7.8
Dann	Benign	0.69

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

Other links and lift over

dbSNP: rs12721454; hg19: chr7-79840339;