Genetic Variant BBX:p.Met192Val (chr3-107728933-A-G) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_001142568.3(BBX):c.574A>G(p.Met192Val) variant causes a missense change. The variant allele was found at a frequency of 0.00000137 in 1,461,428 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000014 ( 0 hom. )

Consequence

BBX
NM_001142568.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 4.49

Publications

0 publications found

Variant links:

Genes affected

BBX (HGNC:14422): (BBX high mobility group box domain containing) Enables sequence-specific double-stranded DNA binding activity. Predicted to be involved in regulation of transcription by RNA polymerase II. Predicted to act upstream of or within bone development. Located in cytosol and nucleoplasm. [provided by Alliance of Genome Resources, Apr 2022]

BBX links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.17809162).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
BBX	NM_001142568.3 link	c.574A>G	p.Met192Val	missense_variant	Exon 6 of 18	ENST00000325805.13	NP_001136040.1	Q8WY36-1A8K6U2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
BBX	ENST00000325805.13 link	c.574A>G	p.Met192Val	missense_variant	Exon 6 of 18	1	NM_001142568.3	ENSP00000319974.8		Q8WY36-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.00000137

AC:

AN:

1461428

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

726972

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33450

American (AMR)

AF:

0.00

AC:

AN:

44678

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26110

East Asian (EAS)

AF:

0.00

AC:

AN:

39692

South Asian (SAS)

AF:

0.0000116

AC:

AN:

86228

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53406

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5758

European-Non Finnish (NFE)

AF:

8.99e-7

AC:

AN:

1111740

Other (OTH)

AF:

0.00

AC:

AN:

60366

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.525

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

not specified

Uncertain:1

Mar 25, 2025

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.574A>G (p.M192V) alteration is located in exon 6 (coding exon 3) of the BBX gene. This alteration results from a A to G substitution at nucleotide position 574, causing the methionine (M) at amino acid position 192 to be replaced by a valine (V). 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

0.10

BayesDel_addAF

Uncertain

0.14

BayesDel_noAF

Uncertain

-0.030

CADD

Benign

(source)

DANN

Uncertain

0.98

DEOGEN2

Benign

0.025

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

Eigen

Benign

-0.13

Eigen_PC

Benign

0.059

FATHMM_MKL

Uncertain

0.95

LIST_S2

Benign

0.84

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

M_CAP

Uncertain

0.10

MetaRNN

Benign

0.18

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

MetaSVM

Uncertain

0.60

MutationAssessor

Benign

0.63

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

PhyloP100

4.5

PrimateAI

Uncertain

0.57

PROVEAN

Benign

-0.86

N;N;N;N;N;N;N;N

REVEL

Uncertain

0.36

Sift

Benign

0.19

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

Sift4G

Benign

0.34

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

Polyphen

0.0

B;B;B;.;.;.;.;B

Vest4

0.36

MutPred

0.49

Gain of glycosylation at T189 (P = 0.0131);Gain of glycosylation at T189 (P = 0.0131);Gain of glycosylation at T189 (P = 0.0131);Gain of glycosylation at T189 (P = 0.0131);Gain of glycosylation at T189 (P = 0.0131);Gain of glycosylation at T189 (P = 0.0131);Gain of glycosylation at T189 (P = 0.0131);Gain of glycosylation at T189 (P = 0.0131);

MVP

0.46

MPC

0.15

ClinPred

0.40

GERP RS

4.9

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.074

gMVP

0.47

Mutation Taster

=88/12

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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3-107728933-A-G

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over