2-197572024-T-C

Position:

• chr2-197572024-T-C

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The NM_144629.3(RFTN2):​c.1490A>G​(p.Gln497Arg) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: RFTN2 NM_144629.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 4.99

Genes affected

RFTN2 (HGNC:26402): (raftlin family member 2) Predicted to act upstream of or within dsRNA transport and response to exogenous dsRNA. Predicted to be located in plasma membrane. [provided by Alliance of Genome Resources, Apr 2022]

LOC124907952 (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.27992952).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
RFTN2	NM_144629.3	c.1490A>G	p.Gln497Arg	missense_variant	9/9	ENST00000295049.9	NP_653230.2
LOC124907952	XR_007087918.1	n.1149T>C		non_coding_transcript_exon_variant	2/2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
RFTN2	ENST00000295049.9	c.1490A>G	p.Gln497Arg	missense_variant	9/9	1	NM_144629.3	ENSP00000295049	P1
RFTN2	ENST00000454447.1	c.566A>G	p.Gln189Arg	missense_variant	5/5	3		ENSP00000387459
RFTN2	ENST00000494346.1	n.662A>G		non_coding_transcript_exon_variant	4/4	2

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 33

Bravo AF: 0.00000378

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

Jun 19, 2024

The c.1490A>G (p.Q497R) alteration is located in exon 9 (coding exon 9) of the RFTN2 gene. This alteration results from a A to G substitution at nucleotide position 1490, causing the glutamine (Q) at amino acid position 497 to be replaced by an arginine (R). 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	0.28
BayesDel_addAF	Uncertain	0.040	T
BayesDel_noAF	Benign	-0.18
CADD	Pathogenic	27
DANN	Uncertain	1.0
DEOGEN2	Benign	0.074	T;T
Eigen	Uncertain	0.49
Eigen_PC	Uncertain	0.49
FATHMM_MKL	Uncertain	0.91	D
LIST_S2	Uncertain	0.87	D;T
M_CAP	Benign	0.024	T
MetaRNN	Benign	0.28	T;T
MetaSVM	Benign	-0.70	T
MutationAssessor	Uncertain	2.5	M;.
MutationTaster	Benign	0.98	D
PrimateAI	Uncertain	0.58	T
PROVEAN	Benign	-1.8	N;N
REVEL	Benign	0.16
Sift	Uncertain	0.0030	D;D
Sift4G	Uncertain	0.013	D;D
Polyphen		0.99	D;.
Vest4		0.36
MutPred		0.26		Gain of solvent accessibility (P = 0.0584);.;
MVP		0.34
MPC		0.35
ClinPred		0.96	D
GERP RS		4.9
Varity_R		0.30
gMVP		0.076

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.070		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: rs2087325822; hg19: chr2-198436748; COSMIC: COSV54390764;