Genetic Variant AP1M2:p.Arg243Gln (chr19-10579804-C-T) – ACMG Classification: Uncertain_significance (3 pts)

Variant summary

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

The NM_005498.5(AP1M2):c.728G>A(p.Arg243Gln) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000806 in 1,613,364 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 0.0000066 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000082 ( 0 hom. )

Consequence

AP1M2
NM_005498.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 7.80

Variant links:

Genes affected

AP1M2 (HGNC:558): (adaptor related protein complex 1 subunit mu 2) This gene encodes a subunit of the heterotetrameric adaptor-related protein comlex 1 (AP-1), which belongs to the adaptor complexes medium subunits family. This protein is capable of interacting with tyrosine-based sorting signals. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jul 2014]

AP1M2 links:

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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, 0.787

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
AP1M2	NM_005498.5 link	c.728G>A	p.Arg243Gln	missense_variant	Exon 7 of 12	ENST00000250244.11	NP_005489.2	Q9Y6Q5-1
AP1M2	NM_001300887.2 link	c.734G>A	p.Arg245Gln	missense_variant	Exon 7 of 12		NP_001287816.1	Q9Y6Q5-2Q53GI5
AP1M2	XM_047438018.1 link	c.656G>A	p.Arg219Gln	missense_variant	Exon 7 of 12		XP_047293974.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
AP1M2	ENST00000250244.11 link	c.728G>A	p.Arg243Gln	missense_variant	Exon 7 of 12	1	NM_005498.5	ENSP00000250244.5	Q9Y6Q5-1
AP1M2	ENST00000590923.5 link	c.734G>A	p.Arg245Gln	missense_variant	Exon 7 of 12	1		ENSP00000465685.1	Q9Y6Q5-2
AP1M2	ENST00000591240.5 link	c.491G>A	p.Arg164Gln	missense_variant	Exon 5 of 7	3		ENSP00000465193.1	K7EJJ1
AP1M2	ENST00000589684.5 link	c.650G>A	p.Arg217Gln	missense_variant	Exon 7 of 7	3		ENSP00000467498.1	K7EPR4

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152122

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000656

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:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000161

AC:

AN:

249180

Hom.:

AF XY:

0.00000740

AC XY:

AN XY:

135046

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000872

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:

0.00000886

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000821

AC:

AN:

1461242

Hom.:

Cov.:

AF XY:

0.00000963

AC XY:

AN XY:

726862

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000671

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000505

Gnomad4 SAS exome

AF:

0.0000232

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000270

Gnomad4 OTH exome

AF:

0.0000331

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152122

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74296

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.0000656

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000434

Hom.:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Feb 21, 2025

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.728G>A (p.R243Q) alteration is located in exon 7 (coding exon 7) of the AP1M2 gene. This alteration results from a G to A substitution at nucleotide position 728, causing the arginine (R) at amino acid position 243 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

Pathogenic

0.83

BayesDel_addAF

Benign

-0.036

BayesDel_noAF

Benign

-0.090

CADD

Pathogenic

DANN

Pathogenic

1.0

DEOGEN2

Benign

0.19

.;T;.;.

Eigen

Uncertain

0.61

Eigen_PC

Uncertain

0.56

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Uncertain

0.93

D;D;D;D

M_CAP

Benign

0.025

MetaRNN

Pathogenic

0.79

D;D;D;D

MetaSVM

Benign

-0.83

MutationAssessor

Pathogenic

3.1

.;M;.;.

PrimateAI

Pathogenic

0.83

PROVEAN

Uncertain

-3.8

.;D;.;.

REVEL

Uncertain

0.38

Sift

Benign

0.051

.;T;.;.

Sift4G

Uncertain

0.040

D;D;.;.

Polyphen

0.93

P;D;.;.

Vest4

0.83

MutPred

0.76

.;Loss of sheet (P = 0.0817);.;.;

MVP

0.34

MPC

0.69

ClinPred

0.90

GERP RS

5.2

Varity_R

0.45

gMVP

0.46

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