Genetic Variant APLN:p.Arg49Trp (chrX-129648715-T-A) – ACMG Classification: Likely_benign (-4 pts)

Variant summary

Our verdict is Likely benign. Variant got -4 ACMG points: 0P and 4B. BS2

The NM_017413.5(APLN):c.145A>T(p.Arg49Trp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000178 in 1,178,143 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 5 hemizygotes in GnomAD. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000079 ( 0 hom., 4 hem., cov: 24)

Exomes 𝑓: 0.000011 ( 0 hom. 1 hem. )

Consequence

APLN
NM_017413.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 2.36

Variant links:

Genes affected

APLN (HGNC:16665): (apelin) This gene encodes a peptide that functions as an endogenous ligand for the G-protein coupled apelin receptor. The encoded preproprotein is proteolytically processed into biologically active C-terminal peptide fragments. These peptide fragments activate different tissue specific signaling pathways that regulate diverse biological functions including fluid homeostasis, cardiovascular function and insulin secretion. This protein also functions as a coreceptor for the human immunodeficiency virus 1. [provided by RefSeq, Feb 2016]

APLN links:

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ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -4 ACMG points.

BS2

High Hemizygotes in GnomAd4 at 4 gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
APLN	NM_017413.5 link	c.145A>T	p.Arg49Trp	missense_variant	Exon 2 of 3	ENST00000429967.3	NP_059109.3	Q9ULZ1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
APLN	ENST00000429967.3 link	c.145A>T	p.Arg49Trp	missense_variant	Exon 2 of 3	1	NM_017413.5	ENSP00000391800.2		Q9ULZ1

Frequencies

GnomAD3 genomes

AF:

0.0000794

AC:

AN:

113347

Hom.:

Cov.:

AF XY:

0.000113

AC XY:

AN XY:

35501

show subpopulations

Gnomad AFR

AF:

0.000288

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:

0.00000796

AC:

AN:

125658

Hom.:

AF XY:

0.00

AC XY:

AN XY:

40888

show subpopulations

Gnomad AFR exome

AF:

0.000133

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:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000113

AC:

AN:

1064746

Hom.:

Cov.:

AF XY:

0.00000288

AC XY:

AN XY:

346636

show subpopulations

Gnomad4 AFR exome

AF:

0.000354

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:

0.00

Gnomad4 OTH exome

AF:

0.0000670

GnomAD4 genome

AF:

0.0000794

AC:

AN:

113397

Hom.:

Cov.:

AF XY:

0.000112

AC XY:

AN XY:

35561

show subpopulations

Gnomad4 AFR

AF:

0.000287

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:

0.000142

Hom.:

Bravo

AF:

0.000125

ExAC

AF:

0.0000176

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Apr 19, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.145A>T (p.R49W) alteration is located in exon 2 (coding exon 2) of the APLN gene. This alteration results from a A to T substitution at nucleotide position 145, causing the arginine (R) at amino acid position 49 to be replaced by a tryptophan (W). 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

0.29

BayesDel_addAF

Benign

-0.033

BayesDel_noAF

Uncertain

-0.040

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.44

FATHMM_MKL

Benign

0.66

LIST_S2

Benign

0.75

M_CAP

Benign

0.060

MetaRNN

Uncertain

0.72

MetaSVM

Benign

-0.80

PrimateAI

Uncertain

0.67

Sift4G

Pathogenic

0.0

Polyphen

1.0

Vest4

0.82

MVP

0.42

ClinPred

0.63

GERP RS

4.5

Varity_R

0.60

gMVP

0.25

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