NM_003664.5:c.2585C>T

Variant names:

Variant summary

Our verdict is Benign. The variant received -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBS1BS2

The NM_003664.5(AP3B1):c.2585C>T(p.Thr862Ile) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000918 in 1,613,454 control chromosomes in the GnomAD database, including 12 homozygotes. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict 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. T862N) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.0047 ( 5 hom., cov: 32)

Exomes 𝑓: 0.00053 ( 7 hom. )

Consequence

AP3B1
NM_003664.5 missense

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:7

Conservation

PhyloP100: 1.95

Publications

6 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 -20 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.009931505).

BP6

Variant 5-78039267-G-A is Benign according to our data. Variant chr5-78039267-G-A is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 434220.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 = 0.00466 (710/152246) while in subpopulation AFR AF = 0.0159 (661/41542). AF 95% confidence interval is 0.0149. There are 5 homozygotes in GnomAd4. There are 330 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

BS2

High Homozygotes in GnomAd4 at 5 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
AP3B1	NM_003664.5 link	c.2585C>T	p.Thr862Ile	missense_variant	Exon 23 of 27	ENST00000255194.11	NP_003655.3	O00203-1A0A0S2Z5J4
AP3B1	NM_001271769.2 link	c.2438C>T	p.Thr813Ile	missense_variant	Exon 23 of 27		NP_001258698.1	O00203-3A0A0S2Z5J4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
AP3B1	ENST00000255194.11 link	c.2585C>T	p.Thr862Ile	missense_variant	Exon 23 of 27	1	NM_003664.5	ENSP00000255194.7		O00203-1

Frequencies

GnomAD3 genomes

AF:

0.00467

AC:

711

AN:

152128

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0160

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00262

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.00335

GnomAD2 exomes

AF:

0.00137

AC:

345

AN:

251320

AF XY:

0.00113

show subpopulations

Gnomad AFR exome

AF:

0.0166

Gnomad AMR exome

AF:

0.00110

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000880

Gnomad OTH exome

AF:

0.000652

GnomAD4 exome

AF:

0.000528

AC:

771

AN:

1461208

Hom.:

Cov.:

AF XY:

0.000480

AC XY:

349

AN XY:

726960

show subpopulations

African (AFR)

AF:

0.0159

AC:

531

AN:

33464

American (AMR)

AF:

0.00123

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.0000383

AC:

AN:

26130

East Asian (EAS)

AF:

0.00

AC:

AN:

39684

South Asian (SAS)

AF:

0.000672

AC:

AN:

86248

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53416

Middle Eastern (MID)

AF:

0.00208

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.0000558

AC:

AN:

1111416

Other (OTH)

AF:

0.000862

AC:

AN:

60358

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.463

Heterozygous variant carriers

122

163

204

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

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:

0.00466

AC:

710

AN:

152246

Hom.:

Cov.:

AF XY:

0.00443

AC XY:

330

AN XY:

74446

show subpopulations

African (AFR)

AF:

0.0159

AC:

661

AN:

41542

American (AMR)

AF:

0.00261

AC:

AN:

15304

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5192

South Asian (SAS)

AF:

0.000207

AC:

AN:

4830

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10582

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0000147

AC:

AN:

68006

Other (OTH)

AF:

0.00331

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.505

Heterozygous variant carriers

110

146

183

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

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:

0.00164

Hom.:

Bravo

AF:

0.00531

ESP6500AA

AF:

0.0157

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.00155

AC:

188

Asia WGS

AF:

0.000289

AC:

AN:

3478

EpiCase

AF:

0.0000545

EpiControl

AF:

0.000178

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:7

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Benign:2

Feb 21, 2013

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Thr862Ile in exon 23 of AP3B1: This variant is not expected to have clinical sig nificance because it has been identified in 1.6% (69/4406) of African American c hromosomes from a broad population by the NHLBI Exome Sequencing Project (http:/ /evs.gs.washington.edu/EVS; dbSNP rs146624866). -

Mar 27, 2017

Genetic Services Laboratory, University of Chicago

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Hermansky-Pudlak syndrome 2

Benign:2

Jan 30, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Jan 13, 2018

Illumina Laboratory Services, Illumina

Significance:Benign

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 and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

not provided

Benign:1

Breakthrough Genomics, Breakthrough Genomics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:not provided

- -

AP3B1-related disorder

Benign:1

Mar 01, 2019

PreventionGenetics, part of Exact Sciences

Significance:Benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

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

Autoinflammatory syndrome

Benign:1

Jun 22, 2021

Genome Diagnostics Laboratory, The Hospital for Sick Children

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.091

BayesDel_addAF

Benign

-0.46

BayesDel_noAF

Benign

-0.41

CADD

Benign

(source)

DANN

Benign

0.95

DEOGEN2

Uncertain

0.60

D;.

Eigen

Benign

-0.020

Eigen_PC

Benign

0.059

FATHMM_MKL

Uncertain

0.88

LIST_S2

Benign

0.75

T;T

MetaRNN

Benign

0.0099

T;T

MetaSVM

Benign

-0.82

MutationAssessor

Uncertain

2.4

M;.

PhyloP100

2.0

PrimateAI

Uncertain

0.49

PROVEAN

Uncertain

-2.8

D;D

REVEL

Benign

0.18

Sift

Benign

0.051

T;T

Sift4G

Benign

0.23

T;T

Polyphen

0.22

B;.

Vest4

0.41

MVP

0.39

MPC

0.14

ClinPred

0.017

GERP RS

5.8

PromoterAI

0.0066

Neutral

(source)

Varity_R

0.12

gMVP

0.41

Mutation Taster

=87/13

polymorphism

(source)

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

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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