rs746408860

chr21-43419379-A-G

Variant summary

Our verdict is Likely benign. Variant got -1 ACMG points: 0P and 1B. BP4

The NM_173354.5(SIK1):c.1219T>C(p.Cys407Arg) variant causes a missense change. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

• Frequency: Genomes: not found (cov: 0)
• Consequence: SIK1 NM_173354.5 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:3
• Conservation: PhyloP100: 3.61

Genes affected

SIK1 (HGNC:11142): (salt inducible kinase 1) This gene encodes a serine/threonine protein kinase that contains a ubiquitin-associated (UBA) domain. The encoded protein is a member of the adenosine monophosphate-activated kinase (AMPK) subfamily of kinases that play a role in conserved signal transduction pathways. A mutation in this gene is associated with early infantile epileptic encephalopathy 30. [provided by RefSeq, Nov 2016]

ACMG classification

Verdict is Likely_benign. Variant got -1 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.39975363).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SIK1	NM_173354.5	c.1219T>C	p.Cys407Arg	missense_variant	10/14	ENST00000270162.8
SIK1	XM_011529474.3	c.1072T>C	p.Cys358Arg	missense_variant	9/13

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SIK1	ENST00000270162.8	c.1219T>C	p.Cys407Arg	missense_variant	10/14	1	NM_173354.5	P1
SIK1	ENST00000644871.1	n.164T>C		non_coding_transcript_exon_variant	2/2

Frequencies

GnomAD3 genomes Cov.: 0

GnomAD3 exomes AF: 0.00000803 AC: 2 AN: 249002 Hom.: 0 AF XY: 0.0000148 AC XY: 2 AN XY: 135188

Gnomad AFR exome AF: 0.0000625

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00000891

Gnomad OTH exome AF: 0.00

GnomAD4 exome Cov.: 0

GnomAD4 genome Cov.: 0

Alfa AF: 0.000140 Hom.: 0

ExAC AF: 0.00000825 AC: 1

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:3

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Mayo Clinic Laboratories, Mayo Clinic

May 20, 2019

- -

Developmental and epileptic encephalopathy, 30 Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Invitae

Jul 05, 2022

This sequence change replaces cysteine, which is neutral and slightly polar, with arginine, which is basic and polar, at codon 407 of the SIK1 protein (p.Cys407Arg). This variant is present in population databases (rs746408860, gnomAD 0.007%). In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt SIK1 protein function. ClinVar contains an entry for this variant (Variation ID: 542708). This variant has not been reported in the literature in individuals affected with SIK1-related conditions. -

Seizure Uncertain:1

Uncertain significance, no assertion criteria provided

clinical testing

New York Genome Center

Oct 30, 2019

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.16
BayesDel_addAF	Benign	-0.13	T
BayesDel_noAF	Benign	-0.24
Cadd	Benign	23
Dann	Uncertain	0.99
DEOGEN2	Uncertain	0.46	T
Eigen	Uncertain	0.22
Eigen_PC	Uncertain	0.26
FATHMM_MKL	Benign	0.75	D
LIST_S2	Benign	0.59	T
M_CAP	Uncertain	0.091	D
MetaRNN	Benign	0.40	T
MetaSVM	Benign	-0.59	T
MutationAssessor	Uncertain	2.1	M
MutationTaster	Benign	1.0	D
PrimateAI	Uncertain	0.51	T
PROVEAN	Uncertain	-3.4	D
REVEL	Benign	0.21
Sift	Uncertain	0.0040	D
Sift4G	Benign	0.094	T
Polyphen		0.85	P
Vest4		0.55
MutPred		0.29		Gain of disorder (P = 0.1105);
MVP		0.32
MPC		0.58
ClinPred		0.79	D
GERP RS		5.2
Varity_R		0.74
gMVP		0.54

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.030		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: rs746408860; hg19: chr21-44839259;