Genetic Variant BCAS3:p.Gly829Trp (chr17-61368386-G-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_017679.5(BCAS3):c.2485G>T(p.Gly829Trp) variant causes a missense change. The variant allele was found at a frequency of 0.00000137 in 1,460,368 control chromosomes in the GnomAD database, with no homozygous occurrence. 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. G829R) has been classified as Likely benign.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000014 ( 0 hom. )

Consequence

BCAS3
NM_017679.5 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 6.25

Publications

0 publications found

Variant links:

Genes affected

BCAS3 (HGNC:14347): (BCAS3 microtubule associated cell migration factor) Enables several functions, including acetyltransferase activator activity; beta-tubulin binding activity; and histone acetyltransferase binding activity. Involved in cellular response to estrogen stimulus; positive regulation of catalytic activity; and positive regulation of transcription by RNA polymerase II. Located in nucleus; phagophore assembly site; and transcriptionally active chromatin. Biomarker of breast cancer. [provided by Alliance of Genome Resources, Apr 2022]

BCAS3 links:

TBX2-AS1 (HGNC:50355): (TBX2 antisense RNA 1)

TBX2-AS1 links:

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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
BCAS3	NM_017679.5 link	c.2485G>T	p.Gly829Trp	missense_variant	Exon 23 of 24	ENST00000407086.8	NP_060149.3	Q9H6U6-2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
BCAS3	ENST00000407086.8 link	c.2485G>T	p.Gly829Trp	missense_variant	Exon 23 of 24	1	NM_017679.5	ENSP00000385323.2		Q9H6U6-2

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.00000137

AC:

AN:

1460368

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

726176

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:

33462

American (AMR)

AF:

0.00

AC:

AN:

44712

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26132

East Asian (EAS)

AF:

0.0000504

AC:

AN:

39654

South Asian (SAS)

AF:

0.00

AC:

AN:

86218

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53336

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5758

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1110784

Other (OTH)

AF:

0.00

AC:

AN:

60312

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0.029673), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.400

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

0.65

BayesDel_addAF

Benign

-0.085

BayesDel_noAF

Benign

-0.36

CADD

Pathogenic

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.18

.;.;T;.;.;T;.;T

Eigen

Uncertain

0.30

Eigen_PC

Uncertain

0.35

FATHMM_MKL

Uncertain

0.92

LIST_S2

Uncertain

0.92

D;D;D;D;D;D;D;D

M_CAP

Benign

0.050

MetaRNN

Uncertain

0.45

T;T;T;T;T;T;T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

0.55

.;.;N;N;.;.;.;.

PhyloP100

6.2

PrimateAI

Uncertain

0.70

PROVEAN

Uncertain

-2.6

.;D;D;.;D;.;.;.

REVEL

Benign

0.23

Sift

Uncertain

0.0090

.;D;D;.;D;.;.;.

Sift4G

Uncertain

0.0040

D;D;D;D;D;D;D;D

Polyphen

0.0010

B;D;D;D;D;.;.;.

Vest4

0.71

MutPred

0.46

.;.;Loss of disorder (P = 0.0072);Loss of disorder (P = 0.0072);.;.;.;.;

MVP

0.30

MPC

1.2

ClinPred

0.96

GERP RS

3.9

Varity_R

0.36

gMVP

0.56

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Computational scores

Splicing

Publications

Other links and lift over