Genetic Variant GEMIN8:p.Ala174Thr (chrX-14009122-C-T) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_001042479.2(GEMIN8):c.520G>A(p.Ala174Thr) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000165 in 1,209,495 control chromosomes in the GnomAD database, with no homozygous occurrence. There are no hemizygote samples in GnomAD. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.0000089 ( 0 hom., 0 hem., cov: 23)

Exomes 𝑓: 9.1e-7 ( 0 hom. 0 hem. )

Consequence

GEMIN8
NM_001042479.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 7.51

Publications

1 publications found

Variant links:

Genes affected

GEMIN8 (HGNC:26044): (gem nuclear organelle associated protein 8) The protein encoded by this gene is part of the SMN complex, which is necessary for spliceosomal snRNP assembly in the cytoplasm and pre-mRNA splicing in the nucleus. The encoded protein binds to both SMN1 and the GEMIN6/GEMIN7 heterodimer, mediating their interaction. This protein is found in nuclear Gemini of Cajal bodies (gems) and in the cytoplasm. Three transcript variants encoding the same protein have been found for this gene. [provided by RefSeq, May 2010]

GEMIN8 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 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
GEMIN8	NM_001042479.2 link	c.520G>A	p.Ala174Thr	missense_variant	Exon 5 of 5	ENST00000680255.1	NP_001035944.1	Q9NWZ8A0A024RBX2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
GEMIN8	ENST00000680255.1 link	c.520G>A	p.Ala174Thr	missense_variant	Exon 5 of 5		NM_001042479.2	ENSP00000505429.1		Q9NWZ8

Frequencies

GnomAD3 genomes

AF:

0.00000888

AC:

AN:

112589

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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:

0.0000188

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

9.12e-7

AC:

AN:

1096906

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

362276

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

26371

American (AMR)

AF:

0.00

AC:

AN:

35205

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

19379

East Asian (EAS)

AF:

0.00

AC:

AN:

30200

South Asian (SAS)

AF:

0.00

AC:

AN:

54113

European-Finnish (FIN)

AF:

0.00

AC:

AN:

40524

Middle Eastern (MID)

AF:

0.00

AC:

AN:

4131

European-Non Finnish (NFE)

AF:

0.00000119

AC:

AN:

840926

Other (OTH)

AF:

0.00

AC:

AN:

46057

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.425

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.00000888

AC:

AN:

112589

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

34741

show subpopulations

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5.

African (AFR)

AF:

0.00

AC:

AN:

31038

American (AMR)

AF:

0.00

AC:

AN:

10662

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

2657

East Asian (EAS)

AF:

0.00

AC:

AN:

3579

South Asian (SAS)

AF:

0.00

AC:

AN:

2745

European-Finnish (FIN)

AF:

0.00

AC:

AN:

6196

Middle Eastern (MID)

AF:

0.00

AC:

AN:

240

European-Non Finnish (NFE)

AF:

0.0000188

AC:

AN:

53273

Other (OTH)

AF:

0.00

AC:

AN:

1512

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5. (p-value = 0.000000), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.375

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Dec 28, 2022

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.520G>A (p.A174T) alteration is located in exon 5 (coding exon 3) of the GEMIN8 gene. This alteration results from a G to A substitution at nucleotide position 520, causing the alanine (A) at amino acid position 174 to be replaced by a threonine (T). 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

AlphaMissense

Pathogenic

0.73

BayesDel_addAF

Pathogenic

0.16

BayesDel_noAF

Uncertain

-0.010

CADD

Uncertain

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.26

T;T;T

FATHMM_MKL

Pathogenic

1.0

LIST_S2

Uncertain

0.91

.;D;T

M_CAP

Pathogenic

0.76

MetaRNN

Uncertain

0.59

D;D;D

MetaSVM

Uncertain

-0.21

MutationAssessor

Uncertain

2.6

M;M;.

PhyloP100

7.5

PrimateAI

Uncertain

0.58

PROVEAN

Uncertain

-2.8

D;D;D

REVEL

Uncertain

0.37

Sift

Uncertain

0.0050

D;D;D

Sift4G

Uncertain

0.0070

D;D;D

Polyphen

1.0

D;D;.

Vest4

0.62

MutPred

0.26

Gain of phosphorylation at A174 (P = 0.0311);Gain of phosphorylation at A174 (P = 0.0311);Gain of phosphorylation at A174 (P = 0.0311);

MVP

0.73

MPC

1.1

ClinPred

0.99

GERP RS

5.7

Varity_R

0.52

gMVP

0.73

Mutation Taster

=40/60

disease causing

(source)

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

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over