X-20156114-C-T

Position:

• chrX-20156114-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 3P and 1B. PM2 PP2 BP4

The NM_004586.3(RPS6KA3):​c.2095G>A​(p.Val699Ile) variant causes a missense change involving the alteration of a conserved nucleotide. 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: 22)
• Consequence: RPS6KA3 NM_004586.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.91

Genes affected

RPS6KA3 (HGNC:10432): (ribosomal protein S6 kinase A3) This gene encodes a member of the RSK (ribosomal S6 kinase) family of serine/threonine kinases. This kinase contains 2 non-identical kinase catalytic domains and phosphorylates various substrates, including members of the mitogen-activated kinase (MAPK) signalling pathway. The activity of this protein has been implicated in controlling cell growth and differentiation. Mutations in this gene have been associated with Coffin-Lowry syndrome (CLS). [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in gene, where missense usually causes diseases (based on misZ statistic), RPS6KA3. . Gene score misZ 4.5208 (greater than the threshold 3.09). GenCC has associacion of gene with intellectual disability, X-linked 19, Coffin-Lowry syndrome, non-syndromic X-linked intellectual disability, symptomatic form of Coffin-Lowry syndrome in female carriers.
• BP4: Computational evidence support a benign effect (MetaRNN=0.35706174).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
RPS6KA3	NM_004586.3	c.2095G>A	p.Val699Ile	missense_variant	21/22	ENST00000379565.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
RPS6KA3	ENST00000379565.9	c.2095G>A	p.Val699Ile	missense_variant	21/22	1	NM_004586.3	P4

Frequencies

GnomAD3 genomes Cov.: 22

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 22

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Coffin-Lowry syndrome;C0796225:Intellectual disability, X-linked 19 Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jun 22, 2023

This variant has not been reported in the literature in individuals affected with RPS6KA3-related conditions. This variant is not present in population databases (gnomAD no frequency). This sequence change replaces valine, which is neutral and non-polar, with isoleucine, which is neutral and non-polar, at codon 699 of the RPS6KA3 protein (p.Val699Ile). An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant is likely to be tolerated. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.29
BayesDel_addAF	Benign	-0.13	T
BayesDel_noAF	Benign	-0.43
CADD	Uncertain	24
DANN	Uncertain	0.99
DEOGEN2	Benign	0.16	T;T;.;.;.;.;.;.;.;.;.;T
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.95	.;D;.;.;.;.;.;D;.;.;D;D
M_CAP	Pathogenic	0.47	D
MetaRNN	Benign	0.36	T;T;T;T;T;T;T;T;T;T;T;T
MetaSVM	Benign	-0.97	T
MutationAssessor	Benign	1.9	L;L;.;.;.;.;.;.;.;.;.;.
MutationTaster	Benign	1.0	D;D;D;D
PrimateAI	Uncertain	0.78	T
PROVEAN	Benign	-0.32	N;.;.;.;.;.;.;.;.;.;.;.
REVEL	Benign	0.17
Sift	Benign	0.13	T;.;.;.;.;.;.;.;.;.;.;.
Sift4G	Benign	0.13	T;.;.;.;.;.;.;.;.;.;.;.
Polyphen		0.0020	B;B;B;B;B;B;B;.;B;B;B;B
Vest4		0.45
MVP		0.56
MPC		1.2
ClinPred		0.77	D
GERP RS		5.6
Varity_R		0.25
gMVP		0.63

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

No publications associated with this variant yet.

Other links and lift over

hg19: chrX-20174232;