6-83195811-C-T

Position:

• chr6-83195811-C-T

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_033411.5(RWDD2A):​c.418C>T​(p.Leu140Phe) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000547 in 1,461,870 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000055 (0 hom.)
• Consequence: RWDD2A NM_033411.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.03

Genes affected

RWDD2A (HGNC:21385): (RWD domain containing 2A)

ACMG classification

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=0.06300917).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
RWDD2A	NM_033411.5	c.418C>T	p.Leu140Phe	missense_variant	3/3	ENST00000369724.5	NP_219479.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
RWDD2A	ENST00000369724.5	c.418C>T	p.Leu140Phe	missense_variant	3/3	1	NM_033411.5	ENSP00000358739.3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD3 exomes AF: 0.00000398 AC: 1 AN: 251442 Hom.: 0 AF XY: 0.00 AC XY: 0 AN XY: 135888

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.0000544

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: 0.00000547 AC: 8 AN: 1461870 Hom.: 0 Cov.: 31 AF XY: 0.00000550 AC XY: 4 AN XY: 727232

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.000202

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ExAC AF: 0.0000247 AC: 3

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 20, 2024

The c.418C>T (p.L140F) alteration is located in exon 3 (coding exon 2) of the RWDD2A gene. This alteration results from a C to T substitution at nucleotide position 418, causing the leucine (L) at amino acid position 140 to be replaced by a phenylalanine (F). 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	0.079
BayesDel_addAF	Benign	-0.29	T
BayesDel_noAF	Benign	-0.44
CADD	Benign	17
DANN	Uncertain	0.97
DEOGEN2	Benign	0.063	T
Eigen	Benign	-0.27
Eigen_PC	Benign	-0.12
FATHMM_MKL	Benign	0.73	D
LIST_S2	Benign	0.69	T
M_CAP	Benign	0.0034	T
MetaRNN	Benign	0.063	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	1.4	L
PrimateAI	Benign	0.38	T
PROVEAN	Benign	-1.4	N
REVEL	Benign	0.036
Sift	Benign	0.11	T
Sift4G	Benign	0.091	T
Polyphen		0.012	B
Vest4		0.10
MutPred		0.27		Gain of methylation at K139 (P = 0.0272);
MVP		0.099
MPC		0.37
ClinPred		0.091	T
GERP RS		5.4
Varity_R		0.089
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

Other links and lift over

dbSNP: rs774790457; hg19: chr6-83905530;