Genetic Variant PALM2AKAP2:p.Ala180Thr (chr9-110015995-G-A) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_007203.5(PALM2AKAP2):c.538G>A(p.Ala180Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000291 in 1,613,956 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/18 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00016 ( 0 hom., cov: 31)

Exomes 𝑓: 0.000016 ( 0 hom. )

Consequence

PALM2AKAP2
NM_007203.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.0400

Variant links:

Genes affected

PALM2AKAP2 (HGNC:33529): (PALM2 and AKAP2 fusion) This gene belongs to the paralemmin downstream gene (PDG) family defined in PMID:22855693. Paralemmin downstream genes may have evolved contiguously with the paralemmin genes and are associated with other paralemmin paralogs in humans and several other taxa. The gene encodes three distinct protein isoforms, the PALM2 isoform, the AKAP2 isoform and the PALM2-AKAP2 isoform. The biological significance of the PALM2-AKAP2 isoforms is yet unknown. Earlier, PALM2 and AKAP2 were annotated as separate genes and PALM2-AKAP2 was annotated as a readthrough gene. [provided by RefSeq, May 2019]

PALM2AKAP2 links:

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ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.034156024).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PALM2AKAP2	NM_007203.5 link	c.538G>A	p.Ala180Thr	missense_variant	Exon 7 of 11	ENST00000374530.8	NP_009134.1	Q9Y2D5-4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
PALM2AKAP2	ENST00000374530.8 link	c.538G>A	p.Ala180Thr	missense_variant	Exon 7 of 11	2	NM_007203.5	ENSP00000363654.3
PALM2AKAP2	ENST00000302798.7 link	c.538G>A	p.Ala180Thr	missense_variant	Exon 7 of 10	2		ENSP00000305861.7
PALM2AKAP2	ENST00000413420.5 link	c.1234G>A	p.Ala412Thr	missense_variant	Exon 8 of 9	2		ENSP00000397839.1	B1ALY0

Frequencies

GnomAD3 genomes

AF:

0.000158

AC:

AN:

152140

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000579

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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:

0.0000398

AC:

AN:

251132

Hom.:

AF XY:

0.00

AC XY:

AN XY:

135746

show subpopulations

Gnomad AFR exome

AF:

0.000493

Gnomad AMR exome

AF:

0.0000579

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:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000157

AC:

AN:

1461816

Hom.:

Cov.:

AF XY:

0.0000110

AC XY:

AN XY:

727204

show subpopulations

Gnomad4 AFR exome

AF:

0.000388

Gnomad4 AMR exome

AF:

0.0000894

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:

8.99e-7

Gnomad4 OTH exome

AF:

0.0000497

GnomAD4 genome

AF:

0.000158

AC:

AN:

152140

Hom.:

Cov.:

AF XY:

0.000121

AC XY:

AN XY:

74310

show subpopulations

Gnomad4 AFR

AF:

0.000579

Gnomad4 AMR

AF:

0.00

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:

0.000225

Hom.:

Bravo

AF:

0.000151

ESP6500AA

AF:

0.000227

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.0000330

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Oct 20, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.538G>A (p.A180T) alteration is located in exon 7 (coding exon 7) of the PALM2-AKAP2 gene. This alteration results from a G to A substitution at nucleotide position 538, causing the alanine (A) at amino acid position 180 to be replaced by a threonine (T). 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

BayesDel_addAF

Benign

-0.56

BayesDel_noAF

Benign

-0.71

CADD

Benign

2.3

DANN

Benign

0.76

Eigen

Benign

-0.96

Eigen_PC

Benign

-1.1

FATHMM_MKL

Benign

0.020

LIST_S2

Benign

0.38

T;T;T

M_CAP

Benign

0.0072

MetaRNN

Benign

0.034

T;T;T

MetaSVM

Benign

-1.0

PrimateAI

Benign

0.23

PROVEAN

Benign

0.79

N;N;N

REVEL

Benign

0.033

Sift

Benign

0.54

T;T;.

Sift4G

Benign

0.60

T;T;T

Vest4

0.10

MVP

0.088

MPC

0.081

ClinPred

0.018

GERP RS

-1.9

gMVP

0.039

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