1-197142964-T-C

Position:

• chr1-197142964-T-C

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_Strong BP6_Very_Strong BS1 BS2

The NM_018136.5(ASPM):​c.1288A>G​(p.Arg430Gly) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0026 in 1,613,988 control chromosomes in the GnomAD database, including 89 homozygotes. In-silico tool predicts a benign outcome for this variant. 13/19 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

• Frequency:
  • Genomes: 𝑓 0.013 (47 hom., cov: 33)
  • Exomes 𝑓: 0.0015 (42 hom.)
• Consequence: ASPM NM_018136.5 missense
• Clinical Significance: Benign criteria provided, multiple submitters, no conflicts B:8 O:1
• Conservation: PhyloP100: 1.86

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 Benign. Variant got -20 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.0028641224).
• BP6: Variant 1-197142964-T-C is Benign according to our data. Variant chr1-197142964-T-C is described in ClinVar as [Benign]. Clinvar id is 21553.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr1-197142964-T-C is described in Lovd as [Benign].
• BS1: Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.0134 (2037/152308) while in subpopulation AFR AF= 0.0457 (1901/41558). AF 95% confidence interval is 0.044. There are 47 homozygotes in gnomad4. There are 969 alleles in male gnomad4 subpopulation. Median coverage is 33. This position pass quality control queck.
• BS2: High Homozygotes in GnomAd4 at 47 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
ASPM	NM_018136.5	c.1288A>G	p.Arg430Gly	missense_variant	3/28	ENST00000367409.9	NP_060606.3
ASPM	NM_001206846.2	c.1288A>G	p.Arg430Gly	missense_variant	3/27		NP_001193775.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
ASPM	ENST00000367409.9	c.1288A>G	p.Arg430Gly	missense_variant	3/28	1	NM_018136.5	ENSP00000356379	P1

Frequencies

GnomAD3 genomes AF: 0.0134 AC: 2033 AN: 152190 Hom.: 47 Cov.: 33

Gnomad AFR AF: 0.0458

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00622

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00949

Gnomad NFE AF: 0.000309

Gnomad OTH AF: 0.00813

GnomAD3 exomes AF: 0.00353 AC: 882 AN: 250072 Hom.: 19 AF XY: 0.00268 AC XY: 364 AN XY: 135642

Gnomad AFR exome AF: 0.0470

Gnomad AMR exome AF: 0.00278

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.0000980

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.000309

Gnomad OTH exome AF: 0.00247

GnomAD4 exome AF: 0.00147 AC: 2155 AN: 1461680 Hom.: 42 Cov.: 33 AF XY: 0.00130 AC XY: 942 AN XY: 727136

Gnomad4 AFR exome AF: 0.0457

Gnomad4 AMR exome AF: 0.00293

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000928

Gnomad4 FIN exome AF: 0.0000375

Gnomad4 NFE exome AF: 0.000221

Gnomad4 OTH exome AF: 0.00374

GnomAD4 genome AF: 0.0134 AC: 2037 AN: 152308 Hom.: 47 Cov.: 33 AF XY: 0.0130 AC XY: 969 AN XY: 74474

Gnomad4 AFR AF: 0.0457

Gnomad4 AMR AF: 0.00621

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.000309

Gnomad4 OTH AF: 0.00805

Alfa AF: 0.00573 Hom.: 9

Bravo AF: 0.0143

ESP6500AA AF: 0.0390 AC: 171

ESP6500EA AF: 0.000116 AC: 1

ExAC AF: 0.00433 AC: 526

Asia WGS AF: 0.00144 AC: 5 AN: 3478

EpiCase AF: 0.000327

EpiControl AF: 0.000415

ClinVar

Significance: Benign

Submissions summary: Benign:8 Other:1

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not provided Benign:4

Benign, criteria provided, single submitter	not provided	Breakthrough Genomics, Breakthrough Genomics	-	- -
Benign, criteria provided, single submitter	clinical testing	Athena Diagnostics	Jul 08, 2019	- -
Benign, criteria provided, single submitter	clinical testing	Center for Pediatric Genomic Medicine, Children's Mercy Hospital and Clinics	Apr 19, 2017	- -
Benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jan 22, 2024	- -

Microcephaly 5, primary, autosomal recessive Benign:2 Other:1

Benign, criteria provided, single submitter	clinical testing	Genome-Nilou Lab	Apr 11, 2023	- -
not provided, no classification provided	literature only	GeneReviews	-	- -
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. -

not specified Benign:2

Benign, criteria provided, single submitter	clinical testing	GeneDx	Sep 18, 2015	This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -
Benign, criteria provided, single submitter	clinical testing	Genetic Services Laboratory, University of Chicago	Feb 08, 2013	- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.11
BayesDel_addAF	Benign	-0.58	T
BayesDel_noAF	Benign	-0.58
CADD	Benign	12
DANN	Benign	0.93
DEOGEN2	Benign	0.063	T;.
Eigen	Benign	-0.61
Eigen_PC	Benign	-0.63
FATHMM_MKL	Benign	0.32	N
LIST_S2	Benign	0.80	T;T
MetaRNN	Benign	0.0029	T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Uncertain	2.2	M;M
MutationTaster	Benign	1.0	N;N
PrimateAI	Benign	0.23	T
PROVEAN	Benign	-1.4	N;N
REVEL	Benign	0.074
Sift	Benign	0.082	T;D
Sift4G	Benign	0.14	T;T
Polyphen		0.0030	B;.
Vest4		0.087
MVP		0.54
ClinPred		0.017	T
GERP RS		4.4
Varity_R		0.086
gMVP		0.22

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: rs6428388; hg19: chr1-197112094;