2-74427462-C-T

Position:

• chr2-74427462-C-T

Variant summary

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

The ENST00000272430.10(RTKN):​c.1217G>A​(p.Ser406Asn) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 16/21 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)
• Consequence: RTKN ENST00000272430.10 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.181

Genes affected

RTKN (HGNC:10466): (rhotekin) This gene encodes a scaffold protein that interacts with GTP-bound Rho proteins. Binding of this protein inhibits the GTPase activity of Rho proteins. This protein may interfere with the conversion of active, GTP-bound Rho to the inactive GDP-bound form by RhoGAP. Rho proteins regulate many important cellular processes, including cytokinesis, transcription, smooth muscle contraction, cell growth and transformation. Dysregulation of the Rho signal transduction pathway has been implicated in many forms of cancer. Alternative splicing results in multiple transcript variants encoding different isoforms. [provided by RefSeq, Jul 2008]

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=0.22248176).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
RTKN	NM_001015055.2	c.1217G>A	p.Ser406Asn	missense_variant	10/12	ENST00000272430.10	NP_001015055.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
RTKN	ENST00000272430.10	c.1217G>A	p.Ser406Asn	missense_variant	10/12	1	NM_001015055.2	ENSP00000272430	P4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

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

Jul 25, 2023

The c.1217G>A (p.S406N) alteration is located in exon 10 (coding exon 10) of the RTKN gene. This alteration results from a G to A substitution at nucleotide position 1217, causing the serine (S) at amino acid position 406 to be replaced by an asparagine (N). 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	0.064
BayesDel_addAF	Benign	-0.26	T
BayesDel_noAF	Benign	-0.61
CADD	Benign	13
DANN	Benign	0.95
DEOGEN2	Benign	0.19	.;T;.
Eigen	Benign	-0.53
Eigen_PC	Benign	-0.36
FATHMM_MKL	Uncertain	0.84	D
LIST_S2	Benign	0.75	T;T;T
M_CAP	Benign	0.0082	T
MetaRNN	Benign	0.22	T;T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	0.76	.;N;.
MutationTaster	Benign	0.99	N;N;N
PrimateAI	Benign	0.34	T
PROVEAN	Benign	-0.18	N;N;N
REVEL	Benign	0.15
Sift	Benign	0.39	T;T;T
Sift4G	Benign	0.35	T;T;T
Polyphen		0.0	B;B;.
Vest4		0.16
MutPred		0.38		.;Loss of disorder (P = 0.0955);.;
MVP		0.77
MPC		0.23
ClinPred		0.10	T
GERP RS		2.1
Varity_R		0.048
gMVP		0.29

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: rs1670466221; hg19: chr2-74654589;