17-43028179-C-T

Variant summary

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

The NM_005440.5(RND2):c.419C>T(p.Pro140Leu) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000889 in 1,461,878 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000089 (0 hom.)
• Consequence: RND2 NM_005440.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.88

Genes affected

RND2 (HGNC:18315): (Rho family GTPase 2) This gene encodes a member of the Rho GTPase family, whose members play a key role in the regulation of actin cytoskeleton organization in response to extracellular growth factors. This particular family member has been implicated in the regulation of neuronal morphology and endosomal trafficking. The gene localizes to chromosome 17 and is the centromeric neighbor of the breast-ovarian cancer susceptibility gene BRCA1. [provided by RefSeq, Jul 2008]

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, 0.867

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
RND2	NM_005440.5	c.419C>T	p.Pro140Leu	missense_variant	4/5	ENST00000587250.4
RND2	XM_011525316.2	c.419C>T	p.Pro140Leu	missense_variant	4/6
RND2	XM_011525317.3	c.335C>T	p.Pro112Leu	missense_variant	4/6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
RND2	ENST00000587250.4	c.419C>T	p.Pro140Leu	missense_variant	4/5	1	NM_005440.5	P1
RND2	ENST00000710494.1	n.347C>T		non_coding_transcript_exon_variant	3/4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000889 AC: 13 AN: 1461878 Hom.: 0 Cov.: 32 AF XY: 0.00000963 AC XY: 7 AN XY: 727238

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: 0.0000117

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

Bravo AF: 0.0000151

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Apr 18, 2023

The c.419C>T (p.P140L) alteration is located in exon 4 (coding exon 4) of the RND2 gene. This alteration results from a C to T substitution at nucleotide position 419, causing the proline (P) at amino acid position 140 to be replaced by a leucine (L). 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	Pathogenic	0.96
BayesDel_addAF	Pathogenic	0.23	D
BayesDel_noAF	Uncertain	0.10
Cadd	Pathogenic	33
Dann	Uncertain	1.0
DEOGEN2	Uncertain	0.62	D
Eigen	Uncertain	0.68
Eigen_PC	Uncertain	0.60
FATHMM_MKL	Uncertain	0.95	D
LIST_S2	Uncertain	0.95	D
M_CAP	Benign	0.066	D
MetaRNN	Pathogenic	0.87	D
MetaSVM	Uncertain	-0.0074	T
MutationAssessor	Uncertain	2.3	M
MutationTaster	Benign	1.0	D;D
PrimateAI	Pathogenic	0.88	D
Sift4G	Uncertain	0.016	D
Polyphen		1.0	D
Vest4		0.78
MutPred		0.71		Loss of sheet (P = 0.0357);
MVP		0.90
MPC		1.0
ClinPred		0.99	D
GERP RS		5.2
Varity_R		0.61
gMVP		0.71

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: rs1248511975; hg19: chr17-41180196;