rs758550029

chr1-197117806-C-Achr1-197117806-C-T

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_018136.5(ASPM):c.4048G>T(p.Ala1350Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 15/20 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A1350T) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: ASPM NM_018136.5 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.925

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 -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.031149387).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
ASPM	NM_018136.5	c.4048G>T	p.Ala1350Ser	missense_variant	17/28	ENST00000367409.9
ASPM	NM_001206846.2	c.4048G>T	p.Ala1350Ser	missense_variant	17/27

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ASPM	ENST00000367409.9	c.4048G>T	p.Ala1350Ser	missense_variant	17/28	1	NM_018136.5	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

Bravo AF: 0.00000378

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.078
BayesDel_addAF	Benign	-0.15	T
BayesDel_noAF	Benign	-0.45
Cadd	Benign	13
Dann	Benign	0.16
DEOGEN2	Benign	0.050	T;.;T
Eigen	Benign	-1.1
Eigen_PC	Benign	-1.0
FATHMM_MKL	Benign	0.036	N
LIST_S2	Benign	0.73	T;T;T
M_CAP	Benign	0.018	T
MetaRNN	Benign	0.031	T;T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	-1.5	N;N;.
MutationTaster	Benign	1.0	N;N;N
PrimateAI	Benign	0.30	T
PROVEAN	Benign	-0.060	N;N;N
REVEL	Benign	0.12
Sift	Benign	0.73	T;T;T
Sift4G	Benign	0.94	T;T;T
Polyphen		0.85	P;.;.
Vest4		0.17
MutPred		0.50		Gain of disorder (P = 0.03);Gain of disorder (P = 0.03);.;
MVP		0.15
ClinPred		0.036	T
GERP RS		-1.6
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.0
Varity_R		0.083
gMVP		0.10

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		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: rs758550029; hg19: chr1-197086936;