chr17-73338843-C-T

Position:

chr17-73338843-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2BP4

The NM_001144952.2(SDK2):c.6263G>A(p.Arg2088Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000291 in 1,613,872 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000031 ( 0 hom. )

Consequence

SDK2
NM_001144952.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 2.21

Variant links:

Genes affected

SDK2 (HGNC:19308): (sidekick cell adhesion molecule 2) The protein encoded by this gene is a member of the immunoglobulin superfamily. The protein contains two immunoglobulin domains and thirteen fibronectin type III domains. Fibronectin type III domains are present in both extracellular and intracellular proteins and tandem repeats are known to contain binding sites for DNA, heparin and the cell surface. This protein, and a homologous mouse sequence, are very similar to the Drosophila sidekick gene product but the specific function of this superfamily member is not yet known. Evidence for alternative splicing at this gene locus has been observed but the full-length nature of additional variants has not yet been determined. [provided by RefSeq, Jul 2008]

SDK2 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

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=0.31250578).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
SDK2	NM_001144952.2 linkuse as main transcript	c.6263G>A	p.Arg2088Gln	missense_variant	45/45	ENST00000392650.8
SDK2	XM_011524914.3 linkuse as main transcript	c.6206G>A	p.Arg2069Gln	missense_variant	44/44
SDK2	XM_011524915.3 linkuse as main transcript	c.6263G>A	p.Arg2088Gln	missense_variant	45/46
SDK2	XM_047436313.1 linkuse as main transcript	c.6206G>A	p.Arg2069Gln	missense_variant	44/45

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SDK2	ENST00000392650.8 linkuse as main transcript	c.6263G>A	p.Arg2088Gln	missense_variant	45/45	5	NM_001144952.2	P1	Q58EX2-1
SDK2	ENST00000424778.1 linkuse as main transcript	c.3734G>A	p.Arg1245Gln	missense_variant	27/27	5
SDK2	ENST00000410094.5 linkuse as main transcript	n.1336G>A		non_coding_transcript_exon_variant	10/10	5

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152164

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000319

AC:

AN:

250868

Hom.:

AF XY:

0.0000295

AC XY:

AN XY:

135592

show subpopulations

Gnomad AFR exome

AF:

0.0000615

Gnomad AMR exome

AF:

0.0000289

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000327

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000353

Gnomad OTH exome

AF:

0.000163

GnomAD4 exome

AF:

0.0000315

AC:

AN:

1461708

Hom.:

Cov.:

AF XY:

0.0000344

AC XY:

AN XY:

727136

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.0000671

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000232

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000342

Gnomad4 OTH exome

AF:

0.0000331

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152164

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74330

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000174

Hom.:

Bravo

AF:

0.0000151

ExAC

AF:

0.0000165

AC:

EpiCase

AF:

0.000109

EpiControl

AF:

0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

May 14, 2024

The c.6263G>A (p.R2088Q) alteration is located in exon 45 (coding exon 45) of the SDK2 gene. This alteration results from a G to A substitution at nucleotide position 6263, causing the arginine (R) at amino acid position 2088 to be replaced by a glutamine (Q). 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

Uncertain

0.45

BayesDel_addAF

Benign

-0.022

BayesDel_noAF

Benign

-0.090

CADD

Uncertain

DANN

Pathogenic

1.0

DEOGEN2

Benign

0.044

T;T

Eigen

Uncertain

0.53

Eigen_PC

Uncertain

0.52

FATHMM_MKL

Uncertain

0.93

LIST_S2

Uncertain

0.96

D;D

M_CAP

Benign

0.021

MetaRNN

Benign

0.31

T;T

MetaSVM

Benign

-0.44

MutationAssessor

Benign

1.9

L;.

MutationTaster

Benign

1.0

D;D

PrimateAI

Uncertain

0.79

PROVEAN

Benign

-1.4

N;N

REVEL

Benign

0.20

Sift

Uncertain

0.0060

D;D

Sift4G

Uncertain

0.015

D;D

Polyphen

0.99

D;.

Vest4

0.51

MVP

0.78

MPC

0.52

ClinPred

0.60

GERP RS

4.7

Varity_R

0.34

gMVP

0.43

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over