rs151142538

Positions:

• chr1-197093070-A-G

Variant summary

Our verdict is Likely benign. Variant got -6 ACMG points: 2P and 8B. PM2 BP4_Moderate BP6 BP7 BS1

The NM_018136.5(ASPM):​c.9276T>C​(p.Gly3092=) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000183 in 1,610,864 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

• Frequency:
  • Genomes: 𝑓 0.0010 (1 hom., cov: 32)
  • Exomes 𝑓: 0.000097 (0 hom.)
• Consequence: ASPM NM_018136.5 synonymous
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1 B:4
• Conservation: PhyloP100: 0.760

Genes affected

ASPM (HGNC:19048): (assembly factor for spindle microtubules) This gene is the human ortholog of the Drosophila melanogaster 'abnormal spindle' gene (asp), which is essential for normal mitotic spindle function in embryonic neuroblasts. Studies in mouse also suggest a role of this gene in mitotic spindle regulation, with a preferential role in regulating neurogenesis. Mutations in this gene are associated with microcephaly primary type 5. Multiple transcript variants encoding different isoforms have been found for this gene.[provided by RefSeq, May 2011]

ACMG classification

Verdict is Likely_benign. Variant got -6 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.25).
• BP6: Variant 1-197093070-A-G is Benign according to our data. Variant chr1-197093070-A-G is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 157907.We mark this variant Likely_benign, oryginal submissions are: {Uncertain_significance=1, Likely_benign=3, Benign=1}.
• BP7: Synonymous conserved (PhyloP=0.76 with no splicing effect.
• BS1: Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.001 (152/152074) while in subpopulation AFR AF= 0.00358 (149/41564). AF 95% confidence interval is 0.00312. There are 1 homozygotes in gnomad4. There are 81 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
ASPM	NM_018136.5	c.9276T>C	p.Gly3092=	synonymous_variant	21/28	ENST00000367409.9
ASPM	NM_001206846.2	c.4521T>C	p.Gly1507=	synonymous_variant	20/27

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ASPM	ENST00000367409.9	c.9276T>C	p.Gly3092=	synonymous_variant	21/28	1	NM_018136.5	P1

Frequencies

GnomAD3 genomes AF: 0.000994 AC: 151 AN: 151956 Hom.: 1 Cov.: 32

Gnomad AFR AF: 0.00357

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000132

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00

Gnomad OTH AF: 0.000479

GnomAD3 exomes AF: 0.000260 AC: 65 AN: 250000 Hom.: 0 AF XY: 0.000163 AC XY: 22 AN XY: 135108

Gnomad AFR exome AF: 0.00395

Gnomad AMR exome AF: 0.0000290

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: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000973 AC: 142 AN: 1458790 Hom.: 0 Cov.: 31 AF XY: 0.0000841 AC XY: 61 AN XY: 725746

Gnomad4 AFR exome AF: 0.00378

Gnomad4 AMR exome AF: 0.0000448

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: 9.01e-7

Gnomad4 OTH exome AF: 0.000216

GnomAD4 genome AF: 0.00100 AC: 152 AN: 152074 Hom.: 1 Cov.: 32 AF XY: 0.00109 AC XY: 81 AN XY: 74334

Gnomad4 AFR AF: 0.00358

Gnomad4 AMR AF: 0.000132

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.00

Gnomad4 OTH AF: 0.000474

Alfa AF: 0.000560 Hom.: 0

Bravo AF: 0.00117

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:1 Benign:4

Revision: criteria provided, conflicting classifications

Submissions by phenotype

not provided Uncertain:1 Benign:2

Uncertain significance, criteria provided, single submitter	clinical testing	Eurofins Ntd Llc (ga)	Aug 31, 2016	- -
Likely benign, criteria provided, single submitter	clinical testing	GeneDx	Aug 02, 2021	- -
Benign, criteria provided, single submitter	clinical testing	Invitae	Dec 15, 2023	- -

not specified Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Genetic Services Laboratory, University of Chicago

Jun 26, 2013

- -

ASPM-related disorder Benign:1

Likely benign, criteria provided, single submitter

clinical testing

PreventionGenetics, part of Exact Sciences

May 30, 2019

This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.25
CADD	Benign	5.3
DANN	Benign	0.72

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: rs151142538; hg19: chr1-197062200;