Genetic Variant SDK1:p.Lys75Lys (chr7-3301811-G-A) – ACMG Classification: Likely_benign (-3 pts)

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 2P and 5B. PM2BP4_StrongBP7

The NM_152744.4(SDK1):c.225G>A(p.Lys75Lys) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000216 in 927,658 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: 𝑓 0.0000068 ( 0 hom., cov: 31)

Exomes 𝑓: 0.0000022 ( 0 hom. )

Failed GnomAD Quality Control

Consequence

SDK1
NM_152744.4 synonymous

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 1.47

Publications

0 publications found

Variant links:

Genes affected

SDK1 (HGNC:19307): (sidekick cell adhesion molecule 1) The protein encoded by this gene is a member of the immunoglobulin superfamily. The protein contains six immunoglobulin-like 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. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jul 2016]

SDK1 links:

SDK1-AS1 (HGNC:40883): (SDK1 antisense RNA 1)

SDK1-AS1 links:

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ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -3 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.83).

BP7

Synonymous conserved (PhyloP=1.47 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_152744.4. 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
	SDK1	NM_152744.4	MANE Select	c.225G>A	p.Lys75Lys	synonymous	Exon 1 of 45	NP_689957.3

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
SDK1	ENST00000404826.7	TSL:1 MANE Select	c.225G>A	p.Lys75Lys	synonymous	Exon 1 of 45	ENSP00000385899.2	Q7Z5N4-1
SDK1	ENST00000389531.7	TSL:5	c.225G>A	p.Lys75Lys	synonymous	Exon 1 of 44	ENSP00000374182.3	F8W6X9
SDK1-AS1	ENST00000437354.2	TSL:3	n.224+418C>T		intron	N/A

Frequencies

GnomAD3 genomes

AF:

0.00000679

AC:

AN:

147262

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:

0.000208

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.00000216

AC:

AN:

927658

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

434908

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

18092

American (AMR)

AF:

0.00

AC:

AN:

3642

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

8130

East Asian (EAS)

AF:

0.00

AC:

AN:

11618

South Asian (SAS)

AF:

0.0000551

AC:

AN:

18134

European-Finnish (FIN)

AF:

0.00

AC:

AN:

9530

Middle Eastern (MID)

AF:

0.00

AC:

AN:

2106

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

823296

Other (OTH)

AF:

0.0000302

AC:

AN:

33110

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.450

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

Data not reliable, filtered out with message: AS_VQSR

AF:

0.00000679

AC:

AN:

147358

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

71770

show subpopulations

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5.

African (AFR)

AF:

0.00

AC:

AN:

40980

American (AMR)

AF:

0.00

AC:

AN:

14866

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3400

East Asian (EAS)

AF:

0.00

AC:

AN:

5022

South Asian (SAS)

AF:

0.000208

AC:

AN:

4806

European-Finnish (FIN)

AF:

0.00

AC:

AN:

8872

Middle Eastern (MID)

AF:

0.00

AC:

AN:

288

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

66166

Other (OTH)

AF:

0.00

AC:

AN:

2050

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5. (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.375

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.00000378

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.83

CADD

Benign

8.5

(source)

DANN

Benign

0.96

PhyloP100

1.5

PromoterAI

0.017

Neutral

(source)

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

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over