rs142938290

Variant names:

Variant summary

Our verdict is Benign. The variant received -10 ACMG points: 0P and 10B. BP4_StrongBP6BP7BS1

The NM_003664.5(AP3B1):c.2310C>T(p.Asp770Asp) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000276 in 1,607,086 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 Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.00025 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00028 ( 0 hom. )

Consequence

AP3B1
NM_003664.5 synonymous

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1B:3

Conservation

PhyloP100: -0.487

Publications

0 publications found

Variant links:

Genes affected

AP3B1 (HGNC:566): (adaptor related protein complex 3 subunit beta 1) This gene encodes a protein that may play a role in organelle biogenesis associated with melanosomes, platelet dense granules, and lysosomes. The encoded protein is part of the heterotetrameric AP-3 protein complex which interacts with the scaffolding protein clathrin. Mutations in this gene are associated with Hermansky-Pudlak syndrome type 2. Two transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Nov 2012]

AP3B1 Gene-Disease associations (from GenCC):

Hermansky-Pudlak syndrome 2
Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Orphanet, ClinGen, G2P

AP3B1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -10 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.77).

BP6

Variant 5-78110294-G-A is Benign according to our data. Variant chr5-78110294-G-A is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 464883.

BP7

Synonymous conserved (PhyloP=-0.487 with no splicing effect.

BS1

Variant frequency is greater than expected in population sas. GnomAd4 allele frequency = 0.00025 (38/152160) while in subpopulation SAS AF = 0.000415 (2/4824). AF 95% confidence interval is 0.000255. There are 0 homozygotes in GnomAd4. There are 19 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein
AP3B1	NM_003664.5 link	c.2310C>T	p.Asp770Asp	synonymous_variant	Exon 20 of 27	ENST00000255194.11	NP_003655.3
AP3B1	NM_001271769.2 link	c.2163C>T	p.Asp721Asp	synonymous_variant	Exon 20 of 27		NP_001258698.1
AP3B1	NM_001410752.1 link	c.2310C>T	p.Asp770Asp	synonymous_variant	Exon 20 of 23		NP_001397681.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
AP3B1	ENST00000255194.11 link	c.2310C>T	p.Asp770Asp	synonymous_variant	Exon 20 of 27	1	NM_003664.5	ENSP00000255194.7

Frequencies

GnomAD3 genomes

AF:

0.000250

AC:

AN:

152042

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000169

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000262

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000414

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000368

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.000224

AC:

AN:

245020

AF XY:

0.000227

show subpopulations

Gnomad AFR exome

AF:

0.0000631

Gnomad AMR exome

AF:

0.000234

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000551

Gnomad FIN exome

AF:

0.0000467

Gnomad NFE exome

AF:

0.000346

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000279

AC:

406

AN:

1454926

Hom.:

Cov.:

AF XY:

0.000283

AC XY:

205

AN XY:

723616

show subpopulations

African (AFR)

AF:

0.0000899

AC:

AN:

33370

American (AMR)

AF:

0.000180

AC:

AN:

44482

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25984

East Asian (EAS)

AF:

0.0000506

AC:

AN:

39564

South Asian (SAS)

AF:

0.000304

AC:

AN:

85600

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53196

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5628

European-Non Finnish (NFE)

AF:

0.000316

AC:

350

AN:

1107010

Other (OTH)

AF:

0.000283

AC:

AN:

60092

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.458

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

100

<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

AF:

0.000250

AC:

AN:

152160

Hom.:

Cov.:

AF XY:

0.000255

AC XY:

AN XY:

74366

show subpopulations

African (AFR)

AF:

0.000169

AC:

AN:

41518

American (AMR)

AF:

0.000262

AC:

AN:

15288

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5186

South Asian (SAS)

AF:

0.000415

AC:

AN:

4824

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10554

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000368

AC:

AN:

68002

Other (OTH)

AF:

0.00

AC:

AN:

2112

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.522

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome 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

Alfa

AF:

0.000381

Hom.:

Bravo

AF:

0.000234

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:1Benign:3

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Hermansky-Pudlak syndrome 2

Uncertain:1Benign:1

Jan 13, 2018

Illumina Laboratory Services, Illumina

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. -

Jan 22, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

not specified

Benign:1

Aug 27, 2024

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

AP3B1-related disorder

Benign:1

Feb 01, 2024

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

BayesDel_noAF

Benign

-0.77

CADD

Benign

5.1

(source)

DANN

Benign

0.82

PhyloP100

-0.49

Mutation Taster

=100/0

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.020

Details are displayed if max score is > 0.2

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

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over