Genetic Variant BBX:p.Ser75Leu (chr3-107716668-C-T) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_001142568.3(BBX):c.224C>T(p.Ser75Leu) variant causes a missense change. The variant allele was found at a frequency of 0.000124 in 1,613,678 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: 𝑓 0.00016 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00012 ( 0 hom. )

Consequence

BBX
NM_001142568.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 4.68

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:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.032965332).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
BBX	NM_001142568.3 link	c.224C>T	p.Ser75Leu	missense_variant	Exon 5 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.224C>T	p.Ser75Leu	missense_variant	Exon 5 of 18	1	NM_001142568.3	ENSP00000319974.8		Q8WY36-1

Frequencies

GnomAD3 genomes

AF:

0.000158

AC:

AN:

152122

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000131

Gnomad ASJ

AF:

0.00518

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000441

Gnomad OTH

AF:

0.000478

GnomAD3 exomes

AF:

0.000299

AC:

AN:

251100

Hom.:

AF XY:

0.000265

AC XY:

AN XY:

135700

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000463

Gnomad ASJ exome

AF:

0.00486

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000529

Gnomad OTH exome

AF:

0.000653

GnomAD4 exome

AF:

0.000120

AC:

176

AN:

1461556

Hom.:

Cov.:

AF XY:

0.000100

AC XY:

AN XY:

727084

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.000515

Gnomad4 ASJ exome

AF:

0.00402

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000270

Gnomad4 OTH exome

AF:

0.000265

GnomAD4 genome

AF:

0.000158

AC:

AN:

152122

Hom.:

Cov.:

AF XY:

0.000135

AC XY:

AN XY:

74308

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.000131

Gnomad4 ASJ

AF:

0.00518

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000441

Gnomad4 OTH

AF:

0.000478

Alfa

AF:

0.000586

Hom.:

Bravo

AF:

0.000223

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.000231

AC:

EpiCase

AF:

0.0000546

EpiControl

AF:

0.0000593

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Oct 05, 2021

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.224C>T (p.S75L) alteration is located in exon 5 (coding exon 2) of the BBX gene. This alteration results from a C to T substitution at nucleotide position 224, causing the serine (S) at amino acid position 75 to be replaced by a leucine (L). 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

0.14

BayesDel_addAF

Uncertain

0.033

BayesDel_noAF

Pathogenic

0.14

CADD

Pathogenic

DANN

Pathogenic

1.0

DEOGEN2

Benign

0.14

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

Eigen

Uncertain

0.52

Eigen_PC

Uncertain

0.56

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Pathogenic

0.98

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

M_CAP

Pathogenic

0.37

MetaRNN

Benign

0.033

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

MetaSVM

Pathogenic

1.1

MutationAssessor

Benign

1.0

L;.;L;.;L;.;.;.;.;.;L;.;.;.;.;.

PrimateAI

Uncertain

0.64

PROVEAN

Benign

-2.4

N;N;N;D;D;D;D;D;D;D;N;D;D;D;D;D

REVEL

Uncertain

0.59

Sift

Uncertain

0.0020

D;D;D;D;D;D;D;D;T;D;D;D;D;D;D;D

Sift4G

Uncertain

0.0090

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

Polyphen

1.0

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

Vest4

0.50

MVP

0.71

MPC

0.61

ClinPred

0.12

GERP RS

5.1

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.32

gMVP

0.34

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

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over