20-20472887-C-T

Variant names:

• chr20-20472887-C-T
• NM_020343.4:c.5437G>A

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_020343.4(RALGAPA2):​c.5437G>A​(p.Ala1813Thr) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: not found (cov: 32)
• Consequence: RALGAPA2 NM_020343.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.85

Genes affected

RALGAPA2 (HGNC:16207): (Ral GTPase activating protein catalytic subunit alpha 2) Predicted to enable GTPase activator activity and protein heterodimerization activity. Predicted to be involved in activation of GTPase activity. Predicted to act upstream of or within Ral protein signal transduction; regulation of exocyst localization; and regulation of protein localization. Located in cytosol and plasma membrane. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Verdict is Uncertain_significance. Variant got 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.86

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
RALGAPA2	NM_020343.4	c.5437G>A	p.Ala1813Thr	missense_variant	Exon 37 of 40	ENST00000202677.12	NP_065076.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
RALGAPA2	ENST00000202677.12	c.5437G>A	p.Ala1813Thr	missense_variant	Exon 37 of 40	5	NM_020343.4	ENSP00000202677.6
RALGAPA2	ENST00000430436.5	c.4885G>A	p.Ala1629Thr	missense_variant	Exon 31 of 33	5		ENSP00000400085.1
RALGAPA2	ENST00000427175.2	c.667G>A	p.Ala223Thr	missense_variant	Exon 6 of 6	2		ENSP00000388695.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Feb 25, 2025

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.5437G>A (p.A1813T) alteration is located in exon 37 (coding exon 37) of the RALGAPA2 gene. This alteration results from a G to A substitution at nucleotide position 5437, causing the alanine (A) at amino acid position 1813 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
AlphaMissense	Benign	0.29
BayesDel_addAF	Pathogenic	0.36	D
BayesDel_noAF	Pathogenic	0.28
CADD	Pathogenic	27
DANN	Pathogenic	1.0
DEOGEN2	Uncertain	0.61	D;.
Eigen	Pathogenic	0.73
Eigen_PC	Pathogenic	0.76
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Uncertain	0.96	D;D
M_CAP	Benign	0.056	D
MetaRNN	Pathogenic	0.86	D;D
MetaSVM	Uncertain	0.78	D
MutationAssessor	Benign	1.8	L;.
PrimateAI	Uncertain	0.75	T
PROVEAN	Uncertain	-3.3	D;.
REVEL	Pathogenic	0.79
Sift	Benign	0.11	T;.
Sift4G	Uncertain	0.0080	D;D
Polyphen		0.93	P;.
Vest4		0.91
MutPred		0.75		Loss of helix (P = 0.0558);.;
MVP		0.75
MPC		0.37
ClinPred		0.99	D
GERP RS		5.8
Varity_R		0.39
gMVP		0.61

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr20-20453531;