Genetic Variant BDP1:p.Met186Val (chr5-71461883-A-G) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_018429.3(BDP1):c.556A>G(p.Met186Val) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000062 in 1,451,084 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 31)

Exomes 𝑓: 0.0000062 ( 0 hom. )

Consequence

BDP1
NM_018429.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 8.37

Variant links:

Genes affected

BDP1 (HGNC:13652): (B double prime 1, subunit of RNA polymerase III transcription initiation factor IIIB) The product of this gene is a subunit of the TFIIIB transcription initiation complex, which recruits RNA polymerase III to target promoters in order to initiate transcription. The encoded protein localizes to concentrated aggregates in the nucleus, and is required for transcription from all three types of polymerase III promoters. It is phosphorylated by casein kinase II during mitosis, resulting in its release from chromatin and suppression of polymerase III transcription. [provided by RefSeq, Jul 2008]

BDP1 links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 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
BDP1	NM_018429.3 link	c.556A>G	p.Met186Val	missense_variant	Exon 3 of 39	ENST00000358731.9	NP_060899.2	A6H8Y1-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
BDP1	ENST00000358731.9 link	c.556A>G	p.Met186Val	missense_variant	Exon 3 of 39	1	NM_018429.3	ENSP00000351575.4		A6H8Y1-1
BDP1	ENST00000508917.6 link	n.748A>G		non_coding_transcript_exon_variant	Exon 3 of 32	1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.00000809

AC:

AN:

247190

Hom.:

AF XY:

0.0000149

AC XY:

AN XY:

134158

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000665

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000620

AC:

AN:

1451084

Hom.:

Cov.:

AF XY:

0.00000692

AC XY:

AN XY:

722398

show subpopulations

Gnomad4 AFR exome

AF:

0.0000302

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000585

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000181

Gnomad4 OTH exome

AF:

0.0000167

GnomAD4 genome

Cov.:

Bravo

AF:

0.0000189

ExAC

AF:

0.00000828

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Apr 09, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.556A>G (p.M186V) alteration is located in exon 3 (coding exon 3) of the BDP1 gene. This alteration results from a A to G substitution at nucleotide position 556, causing the methionine (M) at amino acid position 186 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

Pathogenic

0.62

BayesDel_addAF

Benign

-0.061

BayesDel_noAF

Benign

-0.14

CADD

Uncertain

DANN

Uncertain

0.99

DEOGEN2

Benign

0.21

T;T

Eigen

Pathogenic

0.77

Eigen_PC

Pathogenic

0.74

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Uncertain

0.94

D;D

M_CAP

Benign

0.081

MetaRNN

Uncertain

0.70

D;D

MetaSVM

Benign

-0.90

MutationAssessor

Uncertain

2.7

M;.

PrimateAI

Uncertain

0.60

PROVEAN

Uncertain

-3.4

D;.

REVEL

Uncertain

0.41

Sift

Uncertain

0.013

D;.

Sift4G

Benign

0.069

T;D

Polyphen

0.98

D;.

Vest4

0.79

MutPred

0.41

Gain of sheet (P = 0.0477);Gain of sheet (P = 0.0477);

MVP

0.38

MPC

0.27

ClinPred

0.92

GERP RS

5.2

Varity_R

0.53

gMVP

0.53

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