NM_032122.5:c.662G>A

Variant names:

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBS1BS2

The NM_032122.5(DTNBP1):c.662G>A(p.Arg221Gln) variant causes a missense change. The variant allele was found at a frequency of 0.000509 in 1,613,920 control chromosomes in the GnomAD database, including 3 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R221G) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.0020 ( 2 hom., cov: 31)

Exomes 𝑓: 0.00035 ( 1 hom. )

Consequence

DTNBP1
NM_032122.5 missense

Scores

Clinical Significance

Likely benign criteria provided, multiple submitters, no conflicts U:2B:3

Conservation

PhyloP100: 4.94

Variant links:

Genes affected

DTNBP1 (HGNC:17328): (dystrobrevin binding protein 1) This gene encodes a protein that may play a role in organelle biogenesis associated with melanosomes, platelet dense granules, and lysosomes. A similar protein in mouse is a component of a protein complex termed biogenesis of lysosome-related organelles complex 1 (BLOC-1), and binds to alpha- and beta-dystrobrevins, which are components of the dystrophin-associated protein complex (DPC). Mutations in this gene are associated with Hermansky-Pudlak syndrome type 7. This gene may also be associated with schizophrenia. Multiple transcript variants encoding distinct isoforms have been identified for this gene. [provided by RefSeq, Jul 2008]

DTNBP1 links:

LOC105374947 (HGNC:):

LOC105374947 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -20 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.011042416).

BP6

Variant 6-15533245-C-T is Benign according to our data. Variant chr6-15533245-C-T is described in ClinVar as [Likely_benign]. Clinvar id is 434963.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS1

Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00199 (303/152256) while in subpopulation AFR AF= 0.00589 (245/41564). AF 95% confidence interval is 0.00529. There are 2 homozygotes in gnomad4. There are 143 alleles in male gnomad4 subpopulation. Median coverage is 31. This position pass quality control queck.

BS2

High Homozygotes in GnomAd4 at 2 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
DTNBP1	NM_032122.5 link	c.662G>A	p.Arg221Gln	missense_variant	Exon 8 of 10	ENST00000344537.10	NP_115498.2	Q96EV8-1A0A0S2Z5U8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
DTNBP1	ENST00000344537.10 link	c.662G>A	p.Arg221Gln	missense_variant	Exon 8 of 10	1	NM_032122.5	ENSP00000341680.6		Q96EV8-1

Frequencies

GnomAD3 genomes

AF:

0.00199

AC:

302

AN:

152138

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00589

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00268

Gnomad ASJ

AF:

0.000288

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000132

Gnomad OTH

AF:

0.00335

GnomAD3 exomes

AF:

0.000565

AC:

142

AN:

251384

Hom.:

AF XY:

0.000456

AC XY:

AN XY:

135876

show subpopulations

Gnomad AFR exome

AF:

0.00597

Gnomad AMR exome

AF:

0.000520

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000544

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000202

Gnomad OTH exome

AF:

0.000489

GnomAD4 exome

AF:

0.000354

AC:

518

AN:

1461664

Hom.:

Cov.:

AF XY:

0.000359

AC XY:

261

AN XY:

727126

show subpopulations

Gnomad4 AFR exome

AF:

0.00627

Gnomad4 AMR exome

AF:

0.000760

Gnomad4 ASJ exome

AF:

0.000115

Gnomad4 EAS exome

AF:

0.0000252

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000179

Gnomad4 OTH exome

AF:

0.000977

GnomAD4 genome

AF:

0.00199

AC:

303

AN:

152256

Hom.:

Cov.:

AF XY:

0.00192

AC XY:

143

AN XY:

74434

show subpopulations

Gnomad4 AFR

AF:

0.00589

Gnomad4 AMR

AF:

0.00268

Gnomad4 ASJ

AF:

0.000288

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000132

Gnomad4 OTH

AF:

0.00331

Alfa

AF:

0.000487

Hom.:

Bravo

AF:

0.00253

ESP6500AA

AF:

0.00567

AC:

ESP6500EA

AF:

0.000233

AC:

ExAC

AF:

0.000766

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

EpiCase

AF:

0.000218

EpiControl

AF:

0.000474

ClinVar

Significance: Likely benign

Submissions summary: Uncertain:2Benign:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Uncertain:2Benign:1

Clinical Genetics, Academic Medical Center

Significance: Uncertain significance

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center

Significance: Uncertain significance

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Jan 29, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

not specified

Benign:1

Mar 23, 2016

Genetic Services Laboratory, University of Chicago

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

DTNBP1-related disorder

Benign:1

Jun 16, 2020

PreventionGenetics, part of Exact Sciences

Significance: Likely benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.13

BayesDel_addAF

Benign

-0.24

BayesDel_noAF

Benign

-0.12

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Benign

0.13

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

Eigen

Uncertain

0.56

Eigen_PC

Uncertain

0.50

FATHMM_MKL

Uncertain

0.97

LIST_S2

Uncertain

0.89

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

MetaRNN

Benign

0.011

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

MetaSVM

Benign

-0.94

MutationAssessor

Uncertain

2.8

M;.;.;.;.;M;.

PrimateAI

Uncertain

0.62

PROVEAN

Benign

-1.9

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

REVEL

Benign

0.26

Sift

Benign

0.063

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

Sift4G

Benign

0.12

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

Polyphen

1.0

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

Vest4

0.65

MVP

0.76

MPC

0.55

ClinPred

0.047

GERP RS

5.5

Varity_R

0.10

gMVP

0.38

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