Genetic Variant DBI:p.Ala49Asp (chr2-119367482-C-A) – 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 ENST00000627305.2(DBI):c.146C>A(p.Ala49Asp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000139 in 1,442,192 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 12/16 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000014 ( 0 hom. )

Consequence

DBI
ENST00000627305.2 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: -0.371

Publications

0 publications found

Variant links:

Genes affected

DBI (HGNC:2690): (diazepam binding inhibitor, acyl-CoA binding protein) This gene encodes diazepam binding inhibitor, a protein that is regulated by hormones and is involved in lipid metabolism and the displacement of beta-carbolines and benzodiazepines, which modulate signal transduction at type A gamma-aminobutyric acid receptors located in brain synapses. The protein is conserved from yeast to mammals, with the most highly conserved domain consisting of seven contiguous residues that constitute the hydrophobic binding site for medium- and long-chain acyl-Coenzyme A esters. Diazepam binding inhibitor is also known to mediate the feedback regulation of pancreatic secretion and the postprandial release of cholecystokinin, in addition to its role as a mediator in corticotropin-dependent adrenal steroidogenesis. Three pseudogenes located on chromosomes 6, 8 and 16 have been identified. Multiple transcript variants encoding different isoforms have been described for this gene. [provided by RefSeq, Jul 2008]

DBI 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=0.16313937).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
DBI	NM_001079862.4 link	c.9+422C>A		intron_variant	Intron 1 of 3	ENST00000355857.8	NP_001073331.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
DBI	ENST00000355857.8 link	c.9+422C>A		intron_variant	Intron 1 of 3	1	NM_001079862.4	ENSP00000348116.3

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.00000139

AC:

AN:

1442192

Hom.:

Cov.:

AF XY:

0.00000280

AC XY:

AN XY:

714294

show subpopulations

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

African (AFR)

AF:

0.00

AC:

AN:

33190

American (AMR)

AF:

0.00

AC:

AN:

43524

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25158

East Asian (EAS)

AF:

0.00

AC:

AN:

39242

South Asian (SAS)

AF:

0.00

AC:

AN:

84688

European-Finnish (FIN)

AF:

0.00

AC:

AN:

52460

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5684

European-Non Finnish (NFE)

AF:

9.10e-7

AC:

AN:

1098866

Other (OTH)

AF:

0.0000168

AC:

AN:

59380

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0.00666416), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.325

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.14

BayesDel_addAF

Benign

-0.30

BayesDel_noAF

Benign

-0.67

CADD

Benign

8.0

(source)

DANN

Benign

0.94

Eigen

Benign

-0.67

Eigen_PC

Benign

-0.84

FATHMM_MKL

Benign

0.089

LIST_S2

Benign

0.47

T;T

M_CAP

Benign

0.0086

MetaRNN

Benign

0.16

T;T

MetaSVM

Benign

-1.0

PhyloP100

-0.37

PrimateAI

Benign

0.45

Sift4G

Uncertain

0.050

T;D

Vest4

0.35

MVP

0.36

ClinPred

0.63

GERP RS

0.67

PromoterAI

-0.018

Neutral

(source)

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.0

gMVP

0.055

Mutation Taster

=99/1

polymorphism

(source)

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over