1-47250559-C-T

Variant summary

Our verdict is Benign. Variant got -14 ACMG points: 0P and 14B. BP4_Strong BP6_Moderate BA1

The NM_001048166.1(STIL):c.*577G>A variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0662 in 159,578 control chromosomes in the GnomAD database, including 1,198 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★).

• Frequency:
  • Genomes: 𝑓 0.069 (1191 hom., cov: 33)
  • Exomes 𝑓: 0.0097 (7 hom.)
• Consequence: STIL NM_001048166.1 3_prime_UTR
• Clinical Significance: Benign criteria provided, single submitter B:1
• Conservation: PhyloP100: -0.662

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 Benign. Variant got -14 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.98).
• BP6: Variant 1-47250559-C-T is Benign according to our data. Variant chr1-47250559-C-T is described in ClinVar as [Benign]. Clinvar id is 297546.Status of the report is criteria_provided_single_submitter, 1 stars.
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.236 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
STIL	NM_001048166.1	c.*577G>A		3_prime_UTR_variant	17/17	ENST00000371877.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
STIL	ENST00000371877.8	c.*577G>A		3_prime_UTR_variant	17/17	1	NM_001048166.1	P5

Frequencies

GnomAD3 genomes AF: 0.0688 AC: 10472 AN: 152130 Hom.: 1190 Cov.: 33

Gnomad AFR AF: 0.240

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0240

Gnomad ASJ AF: 0.00144

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00103

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.0190

Gnomad NFE AF: 0.000852

Gnomad OTH AF: 0.0463

GnomAD4 exome AF: 0.00969 AC: 71 AN: 7330 Hom.: 7 Cov.: 0 AF XY: 0.00701 AC XY: 25 AN XY: 3568

Gnomad4 AFR exome AF: 0.234

Gnomad4 AMR exome AF: 0.0317

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.000465

Gnomad4 OTH exome AF: 0.0266

GnomAD4 genome AF: 0.0689 AC: 10492 AN: 152248 Hom.: 1191 Cov.: 33 AF XY: 0.0665 AC XY: 4949 AN XY: 74454

Gnomad4 AFR AF: 0.240

Gnomad4 AMR AF: 0.0239

Gnomad4 ASJ AF: 0.00144

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00104

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.000853

Gnomad4 OTH AF: 0.0458

Alfa AF: 0.00115 Hom.: 2

Bravo AF: 0.0785

Asia WGS AF: 0.0130 AC: 45 AN: 3478

ClinVar

Significance: Benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

Microcephaly 7, primary, autosomal recessive Benign:1

Benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 12, 2018

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.98
Cadd	Benign	0.81
Dann	Benign	0.45
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.0

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: rs11211487; hg19: chr1-47716231;