NM_014927.5:c.187C>G

Variant names:

• chrX-21426619-C-G
• rs749730618
• NM_014927.5:c.187C>G

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_014927.5(CNKSR2):​c.187C>G​(p.Gln63Glu) 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 pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. Q63K) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 22)
  • Exomes 𝑓: 9.1e-7 (0 hom. 1 hem.)
  • Failed GnomAD Quality Control
• Consequence: CNKSR2 NM_014927.5 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 7.51
• Publications: 0 publications found

Genes affected

CNKSR2 (HGNC:19701): (connector enhancer of kinase suppressor of Ras 2) This gene encodes a multidomain protein that functions as a scaffold protein to mediate the mitogen-activated protein kinase pathways downstream from Ras. This gene product is induced by vitamin D and inhibits apoptosis in certain cancer cells. It may also play a role in ternary complex assembly of synaptic proteins at the postsynaptic membrane and coupling of signal transduction to membrane/cytoskeletal remodeling. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Dec 2009]

CNKSR2 Gene-Disease associations (from GenCC):

• X-linked complex neurodevelopmental disorder

  Inheritance: XL Classification: DEFINITIVE Submitted by: ClinGen
• intellectual disability, X-linked, syndromic, Houge type

  Inheritance: XL Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae), G2P
• undetermined early-onset epileptic encephalopathy

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• non-syndromic X-linked intellectual disability

  Inheritance: XL Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.853

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_014927.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CNKSR2	NM_014927.5	MANE Select	c.187C>G	p.Gln63Glu	missense	Exon 2 of 22	NP_055742.2
	CNKSR2	NM_001168647.3		c.187C>G	p.Gln63Glu	missense	Exon 2 of 21	NP_001162118.1	Q8WXI2-5
	CNKSR2	NM_001330770.2		c.187C>G	p.Gln63Glu	missense	Exon 2 of 21	NP_001317699.1	A0A2R8Y7A1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CNKSR2	ENST00000379510.5	TSL:1 MANE Select	c.187C>G	p.Gln63Glu	missense	Exon 2 of 22	ENSP00000368824.3	Q8WXI2-1
	CNKSR2	ENST00000425654.7	TSL:1	c.187C>G	p.Gln63Glu	missense	Exon 2 of 21	ENSP00000397906.2	Q8WXI2-5
	CNKSR2	ENST00000279451.9	TSL:1	c.187C>G	p.Gln63Glu	missense	Exon 2 of 20	ENSP00000279451.5	A0A2U3TZH5

Frequencies

GnomAD3 genomes Cov.: 22

GnomAD2 exomes AF: 0.00000574 AC: 1 AN: 174183 AF XY: 0.0000168

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000390

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome Data not reliable, filtered out with message: AS_VQSR AF: 9.14e-7 AC: 1 AN: 1093585 Hom.: 0 Cov.: 30 AF XY: 0.00000278 AC XY: 1 AN XY: 359635

African (AFR) AF: 0.00 AC: 0 AN: 26036

American (AMR) AF: 0.0000291 AC: 1 AN: 34410

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 19264

East Asian (EAS) AF: 0.00 AC: 0 AN: 29798

South Asian (SAS) AF: 0.00 AC: 0 AN: 53160

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 40479

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 4106

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 840428

Other (OTH) AF: 0.00 AC: 0 AN: 45904

GnomAD4 genome Cov.: 22

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.87
BayesDel_addAF	Pathogenic	0.31	D
BayesDel_noAF	Pathogenic	0.33
CADD	Pathogenic	26
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.72	D
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Pathogenic	1.0	D
M_CAP	Pathogenic	0.54	D
MetaRNN	Pathogenic	0.85	D
MetaSVM	Uncertain	0.16	D
MutationAssessor	Pathogenic	3.9	H
PhyloP100		7.5
PrimateAI	Uncertain	0.77	T
PROVEAN	Uncertain	-2.5	D
REVEL	Uncertain	0.50
Sift	Uncertain	0.0010	D
Sift4G	Pathogenic	0.0	D
Polyphen		1.0	D
Vest4		0.85
MutPred		0.66		Gain of phosphorylation at S58 (P = 0.1471)
MVP		0.94
MPC		2.0
ClinPred		0.99	D
GERP RS		5.3
Varity_R		0.99
gMVP		0.85
Mutation Taster		=38/62	disease causing

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

Other links and lift over

dbSNP: rs749730618; hg19: chrX-21444737;