Genetic Variant NM_001481.3:c.1A>T (chr16-90022722-A-T) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

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

The NM_001481.3(GAS8):c.1A>T(p.Met1?) variant causes a initiator codon, splice region change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000495 in 1,415,322 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000033 ( 0 hom., cov: 33)

Exomes 𝑓: 0.0000016 ( 0 hom. )

Consequence

GAS8
NM_001481.3 initiator_codon, splice_region

Scores

Splicing: ADA: 0.1410

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 1.48

Variant links:

Genes affected

GAS8 (HGNC:4166): (growth arrest specific 8) This gene includes 11 exons spanning 25 kb and maps to a region of chromosome 16 that is sometimes deleted in breast and prostrate cancer. The second intron contains an apparently intronless gene, C16orf3, that is transcribed in the opposite orientation. This gene is a putative tumor suppressor gene. Several transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Oct 2013]

GAS8 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

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 rank	MANE	Protein	UniProt
GAS8	NM_001481.3 link	c.1A>T	p.Met1?	initiator_codon_variant, splice_region_variant	Exon 1 of 11	ENST00000268699.9	NP_001472.1	O95995-1A0A384MR00

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
GAS8	ENST00000268699.9 link	c.1A>T	p.Met1?	initiator_codon_variant, splice_region_variant	Exon 1 of 11	1	NM_001481.3	ENSP00000268699.4		O95995-1

Frequencies

GnomAD3 genomes

AF:

0.0000329

AC:

AN:

151928

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000196

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000294

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.00000158

AC:

AN:

1263394

Hom.:

Cov.:

AF XY:

0.00000162

AC XY:

AN XY:

616714

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

9.91e-7

Gnomad4 OTH exome

AF:

0.0000194

GnomAD4 genome

AF:

0.0000329

AC:

AN:

151928

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74222

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.000196

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000294

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000189

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Primary ciliary dyskinesia 33

Uncertain:1

Dec 16, 2021

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant is not present in population databases (gnomAD no frequency). This sequence change affects the initiator methionine of the GAS8 mRNA. The next in-frame methionine is located at codon 26. This variant has not been reported in the literature in individuals affected with GAS8-related conditions. 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. Experimental studies and prediction algorithms are not available or were not evaluated, and the functional significance of this variant is currently unknown. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_addAF

Uncertain

0.11

BayesDel_noAF

Benign

-0.090

CADD

Benign

DANN

Benign

0.75

DEOGEN2

Benign

0.042

Eigen

Benign

0.079

Eigen_PC

Benign

-0.0069

FATHMM_MKL

Uncertain

0.83

LIST_S2

Uncertain

0.90

M_CAP

Pathogenic

0.68

MetaRNN

Pathogenic

0.98

MetaSVM

Benign

-1.1

PROVEAN

Benign

-1.4

REVEL

Benign

0.24

Sift

Benign

0.25

Sift4G

Uncertain

0.033

Polyphen

0.0030

Vest4

0.83

MutPred

1.0

Loss of methylation at K6 (P = 0.1084);

MVP

0.51

ClinPred

0.20

GERP RS

3.6

Varity_R

0.29

gMVP

0.28

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.14

dbscSNV1_RF

Benign

0.19

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over