chrX-40052225-G-A

Variant names:

• chrX-40052225-G-A
• NM_001123385.2:c.5152C>T

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
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 4.37
• Publications: 0 publications found

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 Gene-Disease associations (from GenCC):

• microphthalmia, syndromic 2

  Inheritance: XL, Unknown Classification: DEFINITIVE, STRONG, SUPPORTIVE, LIMITED Submitted by: G2P, Labcorp Genetics (formerly Invitae), Illumina, Orphanet, ClinGen, Ambry Genetics
• microphthalmia, Lenz type

  Inheritance: XL Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001123385.2. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	BCOR	NM_001123385.2	MANE Select	c.5152C>T	p.Pro1718Ser	missense	Exon 15 of 15	NP_001116857.1	Q6W2J9-1
	BCOR	NM_001437510.1		c.5152C>T	p.Pro1718Ser	missense	Exon 15 of 15	NP_001424439.1
	BCOR	NM_001438207.1		c.5098C>T	p.Pro1700Ser	missense	Exon 14 of 14	NP_001425136.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	BCOR	ENST00000378444.9	TSL:1 MANE Select	c.5152C>T	p.Pro1718Ser	missense	Exon 15 of 15	ENSP00000367705.4	Q6W2J9-1
	BCOR	ENST00000397354.7	TSL:1	c.5050C>T	p.Pro1684Ser	missense	Exon 15 of 15	ENSP00000380512.3	Q6W2J9-2
	BCOR	ENST00000378455.8	TSL:1	c.4996C>T	p.Pro1666Ser	missense	Exon 14 of 14	ENSP00000367716.4	Q6W2J9-4

Frequencies

GnomAD3 genomes Cov.: 23

GnomAD4 exome AF: 9.11e-7 AC: 1 AN: 1098015 Hom.: 0 Cov.: 30 AF XY: 0.00 AC XY: 0 AN XY: 363369

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

African (AFR) AF: 0.00 AC: 0 AN: 26399

American (AMR) AF: 0.00 AC: 0 AN: 35203

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 19385

East Asian (EAS) AF: 0.00 AC: 0 AN: 30205

South Asian (SAS) AF: 0.00 AC: 0 AN: 54114

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 40530

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 4136

European-Non Finnish (NFE) AF: 0.00000119 AC: 1 AN: 841951

Other (OTH) AF: 0.00 AC: 0 AN: 46092

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

GnomAD4 genome Cov.: 23

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	Inborn genetic diseases (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.26
BayesDel_addAF	Uncertain	0.021	T
BayesDel_noAF	Benign	-0.21
CADD	Benign	18
DANN	Uncertain	0.99
DEOGEN2	Benign	0.16	T
FATHMM_MKL	Uncertain	0.96	D
LIST_S2	Uncertain	0.90	D
M_CAP	Pathogenic	0.56	D
MetaRNN	Uncertain	0.48	T
MetaSVM	Benign	-0.34	T
MutationAssessor	Benign	1.8	L
PhyloP100		4.4
PrimateAI	Benign	0.46	T
PROVEAN	Pathogenic	-4.6	D
REVEL	Benign	0.21
Sift	Uncertain	0.024	D
Sift4G	Uncertain	0.013	D
Polyphen		0.044	B
Vest4		0.28
MutPred		0.29		Gain of phosphorylation at P1718 (P = 0.0472)
MVP		0.67
MPC		0.28
ClinPred		0.87	D
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

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

Other links and lift over

hg19: chrX-39911478;