dbSNP rs371601370: AP3M2:p.Ser221Cys (chr8-42165149-C-G) – ACMG Classification: Uncertain_significance (3 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2PP3

The NM_006803.4(AP3M2):c.662C>G(p.Ser221Cys) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000111 in 1,613,564 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 0.000079 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00011 ( 0 hom. )

Consequence

AP3M2
NM_006803.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 7.57

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:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 3 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.788

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
AP3M2	NM_006803.4 link	c.662C>G	p.Ser221Cys	missense_variant	Exon 5 of 9	ENST00000396926.8	NP_006794.1	P53677-1A0A384NYL6
AP3M2	NM_001134296.2 link	c.662C>G	p.Ser221Cys	missense_variant	Exon 6 of 10		NP_001127768.1	P53677-1A0A384NYL6
AP3M2	XM_047421275.1 link	c.317C>G	p.Ser106Cys	missense_variant	Exon 4 of 8		XP_047277231.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
AP3M2	ENST00000396926.8 link	c.662C>G	p.Ser221Cys	missense_variant	Exon 5 of 9	1	NM_006803.4	ENSP00000380132.3		P53677-1

Frequencies

GnomAD3 genomes

AF:

0.0000789

AC:

AN:

152096

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000483

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000655

Gnomad ASJ

AF:

0.00

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:

0.00

GnomAD3 exomes

AF:

0.0000478

AC:

AN:

250940

Hom.:

AF XY:

0.0000516

AC XY:

AN XY:

135634

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:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000969

Gnomad OTH exome

AF:

0.000164

GnomAD4 exome

AF:

0.000114

AC:

167

AN:

1461468

Hom.:

Cov.:

AF XY:

0.000113

AC XY:

AN XY:

727052

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000144

Gnomad4 OTH exome

AF:

0.000116

GnomAD4 genome

AF:

0.0000789

AC:

AN:

152096

Hom.:

Cov.:

AF XY:

0.0000538

AC XY:

AN XY:

74302

show subpopulations

Gnomad4 AFR

AF:

0.0000483

Gnomad4 AMR

AF:

0.0000655

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000132

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000141

Hom.:

Bravo

AF:

0.0000718

TwinsUK

AF:

0.00

AC:

ALSPAC

AF:

0.000259

AC:

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000233

AC:

ExAC

AF:

0.0000659

AC:

EpiCase

AF:

0.00

EpiControl

AF:

0.000178

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Aug 28, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.662C>G (p.S221C) alteration is located in exon 6 (coding exon 4) of the AP3M2 gene. This alteration results from a C to G substitution at nucleotide position 662, causing the serine (S) at amino acid position 221 to be replaced by a cysteine (C). 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

Benign

0.22

BayesDel_addAF

Uncertain

0.098

BayesDel_noAF

Uncertain

0.11

CADD

Pathogenic

DANN

Uncertain

0.99

DEOGEN2

Benign

0.37

T;T;T;T;.;T

Eigen

Pathogenic

0.90

Eigen_PC

Pathogenic

0.86

FATHMM_MKL

Pathogenic

1.0

LIST_S2

Uncertain

0.97

.;D;.;D;D;D

M_CAP

Uncertain

0.089

MetaRNN

Pathogenic

0.79

D;D;D;D;D;D

MetaSVM

Benign

-0.70

MutationAssessor

Pathogenic

3.3

M;M;M;.;.;.

PrimateAI

Pathogenic

0.85

PROVEAN

Uncertain

-3.3

D;D;D;D;D;D

REVEL

Uncertain

0.51

Sift

Uncertain

0.0020

D;D;D;D;D;D

Sift4G

Uncertain

0.0070

D;D;D;D;D;D

Polyphen

0.98

D;D;D;.;D;.

Vest4

0.76

MVP

0.52

MPC

1.2

ClinPred

0.90

GERP RS

5.9

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.42

gMVP

0.49

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