2-8730794-C-T

Position:

• chr2-8730794-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 3P and 2B. PM2 PP2 BP4_Moderate

The NM_020738.4(KIDINS220):​c.5242G>A​(p.Asp1748Asn) 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. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (no stars).

• Frequency: Genomes: not found (cov: 32)
• Consequence: KIDINS220 NM_020738.4 missense
• Clinical Significance: Uncertain significance no assertion criteria provided U:1
• Conservation: PhyloP100: 5.19

Genes affected

KIDINS220 (HGNC:29508): (kinase D interacting substrate 220) This gene encodes a transmembrane protein that is preferentially expressed in the nervous system where it controls neuronal cell survival, differentiation into exons and dendrites, and synaptic plasticity. The encoded protein interacts with membrane receptors, cytosolic signaling components, and cytoskeletal proteins, serving as a scaffold that mediates crosstalk between the neurotrophin pathway and several other intracellular signaling pathways. Aberrant expression of this gene is associated with the onset of various neuropsychiatric disorders and neurodegenerative diseases, including Alzheimer's disease. Naturally occurring mutations in this gene are associated with a syndrome characterized by spastic paraplegia, intellectual disability, nystagmus and obesity. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Feb 2017]

ACMG classification

Verdict is Uncertain_significance. Variant got 1 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), KIDINS220. . Gene score misZ 2.2613 (greater than the threshold 3.09). Trascript score misZ 3.5585 (greater than threshold 3.09). GenCC has associacion of gene with spastic paraplegia, intellectual disability, nystagmus, and obesity, ventriculomegaly and arthrogryposis.
• BP4: Computational evidence support a benign effect (MetaRNN=0.19567698).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
KIDINS220	NM_020738.4	c.5242G>A	p.Asp1748Asn	missense_variant	30/30	ENST00000256707.8	NP_065789.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
KIDINS220	ENST00000256707.8	c.5242G>A	p.Asp1748Asn	missense_variant	30/30	1	NM_020738.4	ENSP00000256707

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 37

GnomAD4 genome Cov.: 32

Bravo AF: 0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: no assertion criteria provided

Submissions by phenotype

KIDINS220-related disorder Uncertain:1

Uncertain significance, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

May 31, 2024

The KIDINS220 c.5242G>A variant is predicted to result in the amino acid substitution p.Asp1748Asn. To our knowledge, this variant has not been reported in the literature or in a large population database, indicating this variant is rare. At this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.12
BayesDel_addAF	Benign	-0.093	T
BayesDel_noAF	Benign	-0.37
CADD	Benign	22
DANN	Uncertain	1.0
DEOGEN2	Benign	0.29	T;.
Eigen	Benign	0.094
Eigen_PC	Benign	0.12
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.95	D;D
M_CAP	Benign	0.044	D
MetaRNN	Benign	0.20	T;T
MetaSVM	Benign	-0.38	T
MutationAssessor	Benign	0.97	L;.
MutationTaster	Benign	1.0	D;D;D;D
PrimateAI	Benign	0.41	T
PROVEAN	Benign	-1.2	N;N
REVEL	Benign	0.21
Sift	Uncertain	0.0010	D;D
Sift4G	Uncertain	0.0070	D;D
Polyphen		0.57	P;.
Vest4		0.14
MutPred		0.16		Gain of MoRF binding (P = 0.0483);.;
MVP		0.61
MPC		0.29
ClinPred		0.50	T
GERP RS		5.7
Varity_R		0.080
gMVP		0.27

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: rs763763798; hg19: chr2-8870924;