Genetic Variant AP3M2:p.Arg85Gln (chr8-42154941-G-A) – ACMG Classification: Uncertain_significance (4 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2PP3_Moderate

The NM_006803.4(AP3M2):c.254G>A(p.Arg85Gln) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000929 in 1,613,926 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000026 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000075 ( 0 hom. )

Consequence

AP3M2
NM_006803.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 9.60

Variant links:

Genes affected

AP3M2 (HGNC:570): (adaptor related protein complex 3 subunit mu 2) This gene encodes a subunit of the heterotetrameric adaptor-related protein comlex 3 (AP-3), which belongs to the adaptor complexes medium subunits family. The AP-3 complex plays a role in protein trafficking to lysosomes and specialized organelles. Multiple alternatively spliced variants, encoding the same protein, have been identified. [provided by RefSeq, Aug 2008]

AP3M2 links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 4 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.854

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
AP3M2	NM_006803.4 link	c.254G>A	p.Arg85Gln	missense_variant	Exon 2 of 9	ENST00000396926.8	NP_006794.1	P53677-1A0A384NYL6
AP3M2	NM_001134296.2 link	c.254G>A	p.Arg85Gln	missense_variant	Exon 3 of 10		NP_001127768.1	P53677-1A0A384NYL6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
AP3M2	ENST00000396926.8 link	c.254G>A	p.Arg85Gln	missense_variant	Exon 2 of 9	1	NM_006803.4	ENSP00000380132.3		P53677-1

Frequencies

GnomAD3 genomes

AF:

0.0000263

AC:

AN:

152006

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000242

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000193

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000294

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000160

AC:

AN:

249588

Hom.:

AF XY:

0.0000296

AC XY:

AN XY:

135118

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000327

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000268

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000752

AC:

AN:

1461802

Hom.:

Cov.:

AF XY:

0.00000825

AC XY:

AN XY:

727196

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.0000224

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000232

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000540

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

AF:

0.0000263

AC:

AN:

152124

Hom.:

Cov.:

AF XY:

0.0000403

AC XY:

AN XY:

74350

show subpopulations

Gnomad4 AFR

AF:

0.0000241

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.000193

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000294

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000772

Hom.:

Bravo

AF:

0.0000378

ExAC

AF:

0.0000165

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Sep 30, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.254G>A (p.R85Q) alteration is located in exon 3 (coding exon 1) of the AP3M2 gene. This alteration results from a G to A substitution at nucleotide position 254, causing the arginine (R) at amino acid position 85 to be replaced by a glutamine (Q). 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

Uncertain

0.35

BayesDel_addAF

Pathogenic

0.25

BayesDel_noAF

Pathogenic

0.21

CADD

Pathogenic

DANN

Pathogenic

1.0

DEOGEN2

Uncertain

0.59

D;D;D;T;.

Eigen

Pathogenic

0.88

Eigen_PC

Pathogenic

0.85

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Pathogenic

0.99

.;D;.;D;D

M_CAP

Uncertain

0.29

MetaRNN

Pathogenic

0.85

D;D;D;D;D

MetaSVM

Uncertain

0.40

MutationAssessor

Uncertain

2.3

M;M;M;.;.

PrimateAI

Pathogenic

0.87

PROVEAN

Uncertain

-3.1

D;D;D;D;D

REVEL

Pathogenic

0.83

Sift

Uncertain

0.0060

D;D;D;T;D

Sift4G

Uncertain

0.0030

D;D;D;D;D

Polyphen

1.0

D;D;D;.;D

Vest4

0.87

MutPred

0.56

Gain of catalytic residue at V87 (P = 0.3421);Gain of catalytic residue at V87 (P = 0.3421);Gain of catalytic residue at V87 (P = 0.3421);Gain of catalytic residue at V87 (P = 0.3421);Gain of catalytic residue at V87 (P = 0.3421);

MVP

0.95

MPC

1.3

ClinPred

0.86

GERP RS

5.3

Varity_R

0.53

gMVP

0.73

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

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