Genetic Variant BCOR:p.Pro1718Ser (chrX-40052225-G-A) – 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_001123385.2(BCOR):c.5152C>T(p.Pro1718Ser) variant causes a missense change. The variant allele was found at a frequency of 0.000000911 in 1,098,015 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: not found (cov: 23)

Exomes 𝑓: 9.1e-7 ( 0 hom. 0 hem. )

Consequence

BCOR
NM_001123385.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 4.37

Variant links:

Genes affected

BCOR (HGNC:20893): (BCL6 corepressor) The protein encoded by this gene was identified as an interacting corepressor of BCL6, a POZ/zinc finger transcription repressor that is required for germinal center formation and may influence apoptosis. This protein selectively interacts with the POZ domain of BCL6, but not with eight other POZ proteins. Specific class I and II histone deacetylases (HDACs) have been shown to interact with this protein, which suggests a possible link between the two classes of HDACs. Several transcript variants encoding different isoforms have been found for this gene. A pseudogene of this gene is found on chromosome Y.[provided by RefSeq, Jun 2010]

BCOR 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
BCOR	NM_001123385.2 link	c.5152C>T	p.Pro1718Ser	missense_variant	Exon 15 of 15	ENST00000378444.9	NP_001116857.1	Q6W2J9-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
BCOR	ENST00000378444.9 link	c.5152C>T	p.Pro1718Ser	missense_variant	Exon 15 of 15	1	NM_001123385.2	ENSP00000367705.4		Q6W2J9-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

9.11e-7

AC:

AN:

1098015

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

363369

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:

26399

American (AMR)

AF:

0.00

AC:

AN:

35203

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

19385

East Asian (EAS)

AF:

0.00

AC:

AN:

30205

South Asian (SAS)

AF:

0.00

AC:

AN:

54114

European-Finnish (FIN)

AF:

0.00

AC:

AN:

40530

Middle Eastern (MID)

AF:

0.00

AC:

AN:

4136

European-Non Finnish (NFE)

AF:

0.00000119

AC:

AN:

841951

Other (OTH)

AF:

0.00

AC:

AN:

46092

⚠️ 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

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Inborn genetic diseases

Uncertain:1

Apr 25, 2022

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.5152C>T (p.P1718S) alteration is located in exon 15 (coding exon 14) of the BCOR gene. This alteration results from a C to T substitution at nucleotide position 5152, causing the proline (P) at amino acid position 1718 to be replaced by a serine (S). 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

Benign

0.26

BayesDel_addAF

Uncertain

0.021

BayesDel_noAF

Benign

-0.21

CADD

Benign

(source)

DANN

Uncertain

0.99

DEOGEN2

Benign

0.16

.;T;.;.;D;.

FATHMM_MKL

Uncertain

0.96

LIST_S2

Uncertain

0.90

D;D;.;D;D;D

M_CAP

Pathogenic

0.56

MetaRNN

Uncertain

0.48

T;T;T;T;T;T

MetaSVM

Benign

-0.34

MutationAssessor

Benign

1.8

.;.;.;.;L;.

PhyloP100

4.4

PrimateAI

Benign

0.46

PROVEAN

Pathogenic

-4.6

D;D;D;D;D;D

REVEL

Benign

0.21

Sift

Uncertain

0.024

D;D;D;D;D;D

Sift4G

Uncertain

0.013

D;D;D;D;D;D

Polyphen

0.044, 0.0070

.;.;B;B;B;B

Vest4

0.28, 0.17, 0.17, 0.12, 0.20

MutPred

0.29

.;.;.;.;Gain of phosphorylation at P1718 (P = 0.0472);.;

MVP

0.67

MPC

0.28

ClinPred

0.87

GERP RS

5.4

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.41

gMVP

0.67

Mutation Taster

=62/38

polymorphism

(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

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chrX-40052225-G-A

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over