17-73348607-C-G

Variant names:

• chr17-73348607-C-G
• rs761734155
• NM_001144952.2:c.6157G>C

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_001144952.2(SDK2):​c.6157G>C​(p.Asp2053His) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. 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. D2053N) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 33)
• Consequence: SDK2 NM_001144952.2 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 7.72
• Publications: 1 publications found

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 Gene-Disease associations (from GenCC):

• intellectual disability

  Inheritance: AR Classification: LIMITED Submitted by: Ambry Genetics

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001144952.2. 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
	SDK2	NM_001144952.2	MANE Select	c.6157G>C	p.Asp2053His	missense	Exon 44 of 45	NP_001138424.1	Q58EX2-1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SDK2	ENST00000392650.8	TSL:5 MANE Select	c.6157G>C	p.Asp2053His	missense	Exon 44 of 45	ENSP00000376421.3	Q58EX2-1
	SDK2	ENST00000424778.1	TSL:5	c.3628G>C	p.Asp1210His	missense	Exon 26 of 27	ENSP00000407098.1	H7C2P2
	SDK2	ENST00000410094.5	TSL:5	n.1230G>C		non_coding_transcript_exon	Exon 9 of 10

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 33

EpiCase AF: 0.0000545

EpiControl AF: 0.00

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.63
BayesDel_addAF	Uncertain	0.059	T
BayesDel_noAF	Benign	-0.15
CADD	Pathogenic	26
DANN	Uncertain	1.0
DEOGEN2	Benign	0.24	T
Eigen	Uncertain	0.67
Eigen_PC	Pathogenic	0.67
FATHMM_MKL	Pathogenic	0.97	D
LIST_S2	Uncertain	0.97	D
M_CAP	Uncertain	0.11	D
MetaRNN	Uncertain	0.53	D
MetaSVM	Benign	-0.42	T
MutationAssessor	Benign	1.9	L
PhyloP100		7.7
PrimateAI	Uncertain	0.78	T
PROVEAN	Uncertain	-3.3	D
REVEL	Uncertain	0.33
Sift	Uncertain	0.0030	D
Sift4G	Uncertain	0.0030	D
Polyphen		1.0	D
Vest4		0.65
MutPred		0.33		Gain of catalytic residue at I2051 (P = 0.1393)
MVP		0.81
MPC		0.96
ClinPred		0.99	D
GERP RS		4.8
Varity_R		0.74
gMVP		0.51

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: rs761734155; hg19: chr17-71344746;