1-197124173-A-C

Variant names:

• chr1-197124173-A-C
• rs587783230
• NM_018136.5:c.3327T>G

Variant summary

Our verdict is Pathogenic. The variant received 12 ACMG points: 12P and 0B. PVS1 PM2 PP5_Moderate

The NM_018136.5(ASPM):​c.3327T>G​(p.Tyr1109*) variant causes a stop gained change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (★). Variant results in nonsense mediated mRNA decay.

• Frequency: Genomes: not found (cov: 32)
• Consequence: ASPM NM_018136.5 stop_gained
• Clinical Significance: Pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: -0.405
• Publications: 1 publications found

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]

ASPM Gene-Disease associations (from GenCC):

• microcephaly 5, primary, autosomal recessive

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), G2P
• autosomal recessive primary microcephaly

  Inheritance: AR Classification: STRONG, SUPPORTIVE Submitted by: Orphanet, ClinGen

ACMG classification

Our verdict: Pathogenic. The variant received 12 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 1-197124173-A-C is Pathogenic according to our data. Variant chr1-197124173-A-C is described in CliVar as Pathogenic. Clinvar id is 157803.Status of the report is criteria_provided_single_submitter, 1 stars. Variant chr1-197124173-A-C is described in CliVar as Pathogenic. Clinvar id is 157803.Status of the report is criteria_provided_single_submitter, 1 stars. Variant chr1-197124173-A-C is described in CliVar as Pathogenic. Clinvar id is 157803.Status of the report is criteria_provided_single_submitter, 1 stars. Variant chr1-197124173-A-C is described in CliVar as Pathogenic. Clinvar id is 157803.Status of the report is criteria_provided_single_submitter, 1 stars. Variant chr1-197124173-A-C is described in CliVar as Pathogenic. Clinvar id is 157803.Status of the report is criteria_provided_single_submitter, 1 stars. Variant chr1-197124173-A-C is described in CliVar as Pathogenic. Clinvar id is 157803.Status of the report is criteria_provided_single_submitter, 1 stars. Variant chr1-197124173-A-C is described in CliVar as Pathogenic. Clinvar id is 157803.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ASPM	NM_018136.5	c.3327T>G	p.Tyr1109*	stop_gained	Exon 13 of 28	ENST00000367409.9	NP_060606.3
ASPM	NM_001206846.2	c.3327T>G	p.Tyr1109*	stop_gained	Exon 13 of 27		NP_001193775.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ASPM	ENST00000367409.9	c.3327T>G	p.Tyr1109*	stop_gained	Exon 13 of 28	1	NM_018136.5	ENSP00000356379.4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000378

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

Submissions by phenotype

Microcephaly 5, primary, autosomal recessive Pathogenic:1

Feb 08, 2013

Genetic Services Laboratory, University of Chicago

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.36	D
BayesDel_noAF	Pathogenic	0.28
CADD	Pathogenic	26
DANN	Uncertain	0.99
Eigen	Benign	-0.21
Eigen_PC	Benign	-0.59
FATHMM_MKL	Benign	0.17	N
PhyloP100		-0.41
Vest4		0.80
GERP RS		-5.5
Mutation Taster		=1/199	disease causing (ClinVar)

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

Other links and lift over

dbSNP: rs587783230; hg19: chr1-197093303;