rs201354921

Positions:

• chr1-47251846-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_001048166.1(STIL):​c.3157G>A​(p.Gly1053Ser) variant causes a missense change. The variant allele was found at a frequency of 0.000097 in 1,607,482 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 0.00012 (0 hom., cov: 33)
  • Exomes 𝑓: 0.000094 (0 hom.)
• Consequence: STIL NM_001048166.1 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:2
• Conservation: PhyloP100: 3.61

Genes affected

STIL (HGNC:10879): (STIL centriolar assembly protein) This gene encodes a cytoplasmic protein implicated in regulation of the mitotic spindle checkpoint, a regulatory pathway that monitors chromosome segregation during cell division to ensure the proper distribution of chromosomes to daughter cells. The protein is phosphorylated in mitosis and in response to activation of the spindle checkpoint, and disappears when cells transition to G1 phase. It interacts with a mitotic regulator, and its expression is required to efficiently activate the spindle checkpoint. It is proposed to regulate Cdc2 kinase activity during spindle checkpoint arrest. Chromosomal deletions that fuse this gene and the adjacent locus commonly occur in T cell leukemias, and are thought to arise through illegitimate V-(D)-J recombination events. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.13432622).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
STIL	NM_001048166.1	c.3157G>A	p.Gly1053Ser	missense_variant	17/17	ENST00000371877.8	NP_001041631.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
STIL	ENST00000371877.8	c.3157G>A	p.Gly1053Ser	missense_variant	17/17	1	NM_001048166.1	ENSP00000360944	P5

Frequencies

GnomAD3 genomes AF: 0.0000920 AC: 14 AN: 152146 Hom.: 0 Cov.: 33

Gnomad AFR AF: 0.0000965

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0000655

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.000192

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.000103

Gnomad OTH AF: 0.000478

GnomAD3 exomes AF: 0.0000739 AC: 18 AN: 243496 Hom.: 0 AF XY: 0.000114 AC XY: 15 AN XY: 131608

Gnomad AFR exome AF: 0.0000622

Gnomad AMR exome AF: 0.0000302

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.000174

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000902

Gnomad OTH exome AF: 0.000170

GnomAD4 exome AF: 0.0000941 AC: 137 AN: 1455218 Hom.: 0 Cov.: 33 AF XY: 0.000105 AC XY: 76 AN XY: 723560

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.0000458

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.000101

Gnomad4 SAS exome AF: 0.000177

Gnomad4 FIN exome AF: 0.0000188

Gnomad4 NFE exome AF: 0.0000992

Gnomad4 OTH exome AF: 0.0000832

GnomAD4 genome AF: 0.000125 AC: 19 AN: 152264 Hom.: 0 Cov.: 33 AF XY: 0.000148 AC XY: 11 AN XY: 74456

Gnomad4 AFR AF: 0.000217

Gnomad4 AMR AF: 0.0000654

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.000193

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.000103

Gnomad4 OTH AF: 0.000473

Alfa AF: 0.000102 Hom.: 0

Bravo AF: 0.0000718

TwinsUK AF: 0.00 AC: 0

ALSPAC AF: 0.000259 AC: 1

ExAC AF: 0.0000741 AC: 9

Asia WGS AF: 0.000289 AC: 1 AN: 3478

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Microcephaly 7, primary, autosomal recessive Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Genetic Services Laboratory, University of Chicago

Apr 17, 2014

- -

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Apr 22, 2023

This variant has not been reported in the literature in individuals affected with STIL-related conditions. This variant is present in population databases (rs201354921, gnomAD 0.02%). This sequence change replaces glycine, which is neutral and non-polar, with serine, which is neutral and polar, at codon 1052 of the STIL protein (p.Gly1052Ser). ClinVar contains an entry for this variant (Variation ID: 160062). 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 STIL protein function. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.078
BayesDel_addAF	Benign	-0.21	T
BayesDel_noAF	Benign	-0.27
CADD	Uncertain	23
DANN	Uncertain	1.0
DEOGEN2	Benign	0.18	T;.;.;.
Eigen	Benign	0.18
Eigen_PC	Uncertain	0.26
FATHMM_MKL	Uncertain	0.93	D
LIST_S2	Benign	0.84	T;T;T;T
M_CAP	Benign	0.014	T
MetaRNN	Benign	0.13	T;T;T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Uncertain	2.1	M;.;.;.
MutationTaster	Benign	0.70	D;D;D;D;D
PrimateAI	Uncertain	0.49	T
PROVEAN	Benign	-1.5	N;D;N;N
REVEL	Benign	0.072
Sift	Benign	0.35	T;D;T;T
Sift4G	Benign	0.47	T;T;T;T
Polyphen		0.98	D;.;D;D
Vest4		0.27
MutPred		0.23		Loss of glycosylation at S1051 (P = 0.0602);.;.;.;
MVP		0.70
MPC		0.40
ClinPred		0.16	T
GERP RS		4.8
Varity_R		0.090
gMVP		0.42

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: rs201354921; hg19: chr1-47717518;