Genetic Variant BTG4:p.Ala56Asp (chr11-111498610-G-T) – ACMG Classification: Likely_pathogenic (6 pts)

Variant summary

Our verdict is Likely pathogenic. The variant received 6 ACMG points: 6P and 0B. PM2PM5PP3_Moderate

The NM_001367975.1(BTG4):c.167C>A(p.Ala56Asp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000685 in 1,460,186 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A56T) has been classified as Likely pathogenic.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

BTG4
NM_001367975.1 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 3.48

Publications

0 publications found

Variant links:

Genes affected

BTG4 (HGNC:13862): (BTG anti-proliferation factor 4) The protein encoded by this gene is a member of the BTG/Tob family. This family has structurally related proteins that appear to have antiproliferative properties. This encoded protein can induce G1 arrest in the cell cycle. [provided by RefSeq, Jul 2008]

BTG4 Gene-Disease associations (from GenCC):

oocyte maturation defect 8
Inheritance: AR Classification: STRONG, LIMITED Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae)
female infertility
Inheritance: AR Classification: MODERATE Submitted by: Franklin by Genoox

BTG4 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_pathogenic. The variant received 6 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PM5

Other missense variant is known to change same aminoacid residue: Variant chr11-111498611-C-T is described in ClinVar as [Likely_pathogenic]. Clinvar id is 977514.Status of the report is criteria_provided_single_submitter, 1 stars.

PP3

MetaRNN computational evidence supports a deleterious effect, 0.934

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
BTG4	NM_001367975.1 link	c.167C>A	p.Ala56Asp	missense_variant	Exon 2 of 5	ENST00000692032.1	NP_001354904.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
BTG4	ENST00000692032.1 link	c.167C>A	p.Ala56Asp	missense_variant	Exon 2 of 5		NM_001367975.1	ENSP00000509850.1		A0A8I5KVE8

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.85e-7

AC:

AN:

1460186

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

726274

show subpopulations

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

African (AFR)

AF:

0.00

AC:

AN:

33392

American (AMR)

AF:

0.00

AC:

AN:

44386

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26118

East Asian (EAS)

AF:

0.00

AC:

AN:

39642

South Asian (SAS)

AF:

0.00

AC:

AN:

85596

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53362

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5766

European-Non Finnish (NFE)

AF:

9.00e-7

AC:

AN:

1111586

Other (OTH)

AF:

0.00

AC:

AN:

60338

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 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

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.98

BayesDel_addAF

Pathogenic

0.36

BayesDel_noAF

Pathogenic

0.29

CADD

Uncertain

(source)

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.47

T;.;.

Eigen

Uncertain

0.34

Eigen_PC

Uncertain

0.24

FATHMM_MKL

Uncertain

0.94

LIST_S2

Uncertain

0.95

D;D;D

M_CAP

Benign

0.037

MetaRNN

Pathogenic

0.93

D;D;D

MetaSVM

Uncertain

0.092

MutationAssessor

Pathogenic

3.0

M;M;.

PhyloP100

3.5

PrimateAI

Uncertain

0.65

PROVEAN

Pathogenic

-5.3

D;D;D

REVEL

Uncertain

0.57

Sift

Uncertain

0.0010

D;D;D

Sift4G

Uncertain

0.0020

D;D;.

Polyphen

1.0

D;.;.

Vest4

0.89

MutPred

0.86

Loss of sheet (P = 0.0315);Loss of sheet (P = 0.0315);Loss of sheet (P = 0.0315);

MVP

0.54

MPC

0.87

ClinPred

1.0

GERP RS

2.1

Varity_R

0.85

gMVP

0.86

Mutation Taster

=86/14

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

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11-111498610-G-T

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over