X-154460193-G-C

Position:

• chrX-154460193-G-C

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_017514.5(PLXNA3):​c.10G>C​(p.Val4Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000918 in 1,089,261 control chromosomes in the GnomAD database, with no homozygous occurrence. There are no hemizygote samples in GnomAD. In-silico tool predicts a benign outcome for this variant. 13/17 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (no stars). Synonymous variant affecting the same amino acid position (i.e. V4V) has been classified as Benign.

• Frequency:
  • Genomes: not found (cov: 24)
  • Exomes 𝑓: 9.2e-7 (0 hom. 0 hem.)
• Consequence: PLXNA3 NM_017514.5 missense
• Clinical Significance: Uncertain significance no assertion criteria provided U:1
• Conservation: PhyloP100: 0.580

Genes affected

PLXNA3 (HGNC:9101): (plexin A3) This gene encodes a member of the plexin class of proteins. The encoded protein is a class 3 semaphorin receptor, and may be involved in cytoskeletal remodeling and as well as apoptosis. Studies of a similar gene in zebrafish suggest that it is important for axon pathfinding in the developing nervous system. This gene may be associated with tumor progression. [provided by RefSeq, Aug 2013]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.1300301).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
PLXNA3	NM_017514.5	c.10G>C	p.Val4Leu	missense_variant	2/33	ENST00000369682.4
PLXNA3	XM_047442247.1	c.10G>C	p.Val4Leu	missense_variant	2/22
PLXNA3	XR_007068193.1	n.185G>C		non_coding_transcript_exon_variant	2/32
PLXNA3	XR_430556.4	n.185G>C		non_coding_transcript_exon_variant	2/19

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PLXNA3	ENST00000369682.4	c.10G>C	p.Val4Leu	missense_variant	2/33	1	NM_017514.5	P1
PLXNA3	ENST00000495040.1	n.146-906G>C		intron_variant, non_coding_transcript_variant		5

Frequencies

GnomAD3 genomes Cov.: 24

GnomAD4 exome AF: 9.18e-7 AC: 1 AN: 1089261 Hom.: 0 Cov.: 30 AF XY: 0.00 AC XY: 0 AN XY: 356281

Gnomad4 AFR exome AF: 0.00

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: 0.00000120

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 24

Bravo AF: 0.00000756

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: no assertion criteria provided

Submissions by phenotype

PLXNA3-related disorder Uncertain:1

Uncertain significance, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

May 02, 2024

The PLXNA3 c.10G>C variant is predicted to result in the amino acid substitution p.Val4Leu. To our knowledge, this variant has not been reported in the literature or in a large population database, indicating this variant is rare. At this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.070
BayesDel_addAF	Benign	-0.52	T
BayesDel_noAF	Benign	-0.99
CADD	Benign	8.7
DANN	Benign	0.83
FATHMM_MKL	Benign	0.25	N
M_CAP	Benign	0.016	T
MetaRNN	Benign	0.13	T
MetaSVM	Benign	-0.95	T
MutationTaster	Benign	1.0	N
PrimateAI	Benign	0.41	T
PROVEAN	Benign	0.18	N
REVEL	Benign	0.037
Sift	Benign	0.22	T
Sift4G	Benign	0.75	T
Vest4		0.14
MutPred		0.44		Gain of disorder (P = 0.1269);
MVP		0.22
ClinPred		0.037	T
GERP RS		2.1
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.6
gMVP		0.41

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

Other links and lift over

dbSNP: rs2068917955; hg19: chrX-153688533;