11-984723-C-A

Variant names:

• chr11-984723-C-A
• NM_012305.4:c.784C>A

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_012305.4(AP2A2):​c.784C>A​(p.Leu262Met) variant causes a missense change. The variant allele was found at a frequency of 0.00000137 in 1,460,818 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. L262R) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: AP2A2 NM_012305.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 4.86
• Publications: 0 publications found

Genes affected

AP2A2 (HGNC:562): (adaptor related protein complex 2 subunit alpha 2) The protein encoded by this gene is a subunit of the AP-2 adaptor protein complex, which is involved in linking lipid and protein membrane components with the clathrin lattice. This interaction supports the formation of clathrin-coated vesicles, and the encoded subunit aids in the process by binding polyphosphoinositide-containing lipids in the cell membrane. [provided by RefSeq, Nov 2016]

AP2A2 Gene-Disease associations (from GenCC):

• schizophrenia

  Inheritance: Unknown Classification: LIMITED Submitted by: Labcorp Genetics (formerly Invitae)

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_012305.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	AP2A2	NM_012305.4	MANE Select	c.784C>A	p.Leu262Met	missense	Exon 7 of 22	NP_036437.1	O94973-1
	AP2A2	NM_001242837.2		c.784C>A	p.Leu262Met	missense	Exon 7 of 22	NP_001229766.1	O94973-2
	AP2A2	NR_144509.2		n.936C>A		non_coding_transcript_exon	Exon 7 of 21

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	AP2A2	ENST00000448903.7	TSL:1 MANE Select	c.784C>A	p.Leu262Met	missense	Exon 7 of 22	ENSP00000413234.3	O94973-1
	AP2A2	ENST00000332231.9	TSL:1	c.784C>A	p.Leu262Met	missense	Exon 7 of 22	ENSP00000327694.5	O94973-2
	AP2A2	ENST00000528815.5	TSL:2	n.784C>A		non_coding_transcript_exon	Exon 7 of 21	ENSP00000431630.1	O94973-3

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1460818 Hom.: 0 Cov.: 31 AF XY: 0.00000138 AC XY: 1 AN XY: 726752

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.00 AC: 0 AN: 33472

American (AMR) AF: 0.00 AC: 0 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26136

East Asian (EAS) AF: 0.00 AC: 0 AN: 39696

South Asian (SAS) AF: 0.00 AC: 0 AN: 86256

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 52844

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.00000180 AC: 2 AN: 1111560

Other (OTH) AF: 0.00 AC: 0 AN: 60362

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0.0296732), which strongly suggests a high chance of mosaicism in these individuals.

GnomAD4 genome Cov.: 33

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	not specified (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.39
BayesDel_addAF	Uncertain	0.059	T
BayesDel_noAF	Benign	-0.15
CADD	Pathogenic	27
DANN	Uncertain	1.0
DEOGEN2	Benign	0.33	T
Eigen	Uncertain	0.53
Eigen_PC	Uncertain	0.44
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Pathogenic	0.98	D
M_CAP	Benign	0.059	D
MetaRNN	Uncertain	0.61	D
MetaSVM	Benign	-0.65	T
MutationAssessor	Uncertain	2.3	M
PhyloP100		4.9
PrimateAI	Pathogenic	0.82	D
PROVEAN	Benign	-1.7	N
REVEL	Uncertain	0.32
Sift	Uncertain	0.0010	D
Sift4G	Benign	0.083	T
Polyphen		1.0	D
Vest4		0.67
MutPred		0.68		Loss of helix (P = 0.079)
MVP		0.52
MPC		1.7
ClinPred		0.96	D
GERP RS		3.8
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.46
gMVP		0.50
Mutation Taster		=38/62	disease causing

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

Other links and lift over

hg19: chr11-984723;