Genetic Variant BLTP3A:p.Ala257Thr (chr6-34835393-G-A) – 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_017754.4(BLTP3A):c.769G>A(p.Ala257Thr) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000481 in 1,614,050 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00042 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00049 ( 1 hom. )

Consequence

BLTP3A
NM_017754.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 8.12

Variant links:

Genes affected

BLTP3A (HGNC:21216): (bridge-like lipid transfer protein family member 3A) Enables histone deacetylase binding activity and identical protein binding activity. [provided by Alliance of Genome Resources, Apr 2022]

BLTP3A 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=0.017171085).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
BLTP3A	NM_017754.4 link	c.769G>A	p.Ala257Thr	missense_variant	Exon 7 of 21	ENST00000192788.6	NP_060224.3	Q6BDS2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
BLTP3A	ENST00000192788.6 link	c.769G>A	p.Ala257Thr	missense_variant	Exon 7 of 21	1	NM_017754.4	ENSP00000192788.5		Q6BDS2

Frequencies

GnomAD3 genomes

AF:

0.000421

AC:

AN:

152164

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000121

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000917

Gnomad ASJ

AF:

0.00663

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000309

Gnomad OTH

AF:

0.000478

GnomAD3 exomes

AF:

0.000818

AC:

204

AN:

249512

Hom.:

AF XY:

0.000717

AC XY:

AN XY:

135372

show subpopulations

Gnomad AFR exome

AF:

0.0000646

Gnomad AMR exome

AF:

0.00171

Gnomad ASJ exome

AF:

0.00805

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000980

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000415

Gnomad OTH exome

AF:

0.00215

GnomAD4 exome

AF:

0.000487

AC:

712

AN:

1461886

Hom.:

Cov.:

AF XY:

0.000477

AC XY:

347

AN XY:

727244

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00177

Gnomad4 ASJ exome

AF:

0.00830

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.000116

Gnomad4 FIN exome

AF:

0.0000187

Gnomad4 NFE exome

AF:

0.000326

Gnomad4 OTH exome

AF:

0.000712

GnomAD4 genome

AF:

0.000421

AC:

AN:

152164

Hom.:

Cov.:

AF XY:

0.000484

AC XY:

AN XY:

74338

show subpopulations

Gnomad4 AFR

AF:

0.000121

Gnomad4 AMR

AF:

0.000917

Gnomad4 ASJ

AF:

0.00663

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000309

Gnomad4 OTH

AF:

0.000478

Alfa

AF:

0.000724

Hom.:

Bravo

AF:

0.000555

TwinsUK

AF:

0.000270

AC:

ALSPAC

AF:

0.000259

AC:

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000592

AC:

ExAC

AF:

0.000678

AC:

EpiCase

AF:

0.000545

EpiControl

AF:

0.000415

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Oct 18, 2021

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.769G>A (p.A257T) alteration is located in exon 7 (coding exon 7) of the UHRF1BP1 gene. This alteration results from a G to A substitution at nucleotide position 769, causing the alanine (A) at amino acid position 257 to be replaced by a threonine (T). 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

Benign

-0.33

BayesDel_noAF

Benign

-0.27

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Benign

0.077

T;T

Eigen

Uncertain

0.68

Eigen_PC

Pathogenic

0.67

FATHMM_MKL

Uncertain

0.95

LIST_S2

Uncertain

0.90

D;D

M_CAP

Benign

0.0091

MetaRNN

Benign

0.017

T;T

MetaSVM

Benign

-1.1

MutationAssessor

Benign

1.4

.;L

PrimateAI

Pathogenic

0.79

PROVEAN

Benign

-2.3

N;N

REVEL

Benign

0.25

Sift

Pathogenic

0.0

D;D

Sift4G

Uncertain

0.021

D;D

Polyphen

1.0

.;D

Vest4

0.72

MVP

0.48

MPC

0.29

ClinPred

0.056

GERP RS

4.5

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.60

gMVP

0.71

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