Genetic Variant ASPM:p.Cys2777Tyr (chr1-197100921-C-T) – ACMG Classification: Uncertain_significance (1 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 2P and 1B. PM2BP4

The NM_018136.5(ASPM):c.8330G>A(p.Cys2777Tyr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,460,846 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/22 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. C2777S) has been classified as Likely benign.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000014 ( 0 hom. )

Consequence

ASPM
NM_018136.5 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 0.802

Publications

0 publications found

Variant links:

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

ASPM links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.30594093).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_018136.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ASPM	NM_018136.5	MANE Select	c.8330G>A	p.Cys2777Tyr	missense	Exon 18 of 28	NP_060606.3
	ASPM	NM_001206846.2		c.4066-4757G>A		intron	N/A	NP_001193775.1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
ASPM	ENST00000367409.9	TSL:1 MANE Select	c.8330G>A	p.Cys2777Tyr	missense	Exon 18 of 28	ENSP00000356379.4
ASPM	ENST00000294732.11	TSL:1	c.4066-4757G>A		intron	N/A	ENSP00000294732.7
ASPM	ENST00000367408.6	TSL:1	n.2108-4757G>A		intron	N/A

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.00000137

AC:

AN:

1460846

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

726752

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33420

American (AMR)

AF:

0.00

AC:

AN:

44600

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26086

East Asian (EAS)

AF:

0.00

AC:

AN:

39668

South Asian (SAS)

AF:

0.00

AC:

AN:

86230

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53394

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5762

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1111360

Other (OTH)

AF:

0.0000332

AC:

AN:

60326

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.500

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.090

BayesDel_addAF

Benign

-0.11

BayesDel_noAF

Benign

-0.39

CADD

Benign

6.2

(source)

DANN

Benign

0.95

DEOGEN2

Benign

0.26

Eigen

Benign

-0.41

Eigen_PC

Benign

-0.64

FATHMM_MKL

Benign

0.072

LIST_S2

Benign

0.77

M_CAP

Benign

0.016

MetaRNN

Benign

0.31

MetaSVM

Benign

-0.92

MutationAssessor

Uncertain

2.1

PhyloP100

0.80

PrimateAI

Benign

0.26

PROVEAN

Benign

-2.2

REVEL

Benign

0.15

Sift

Benign

0.72

Sift4G

Uncertain

0.040

Polyphen

0.98

Vest4

0.30

MutPred

0.49

Gain of MoRF binding (P = 0.0819)

MVP

0.44

ClinPred

0.17

GERP RS

-0.94

Varity_R

0.044

gMVP

0.015

Mutation Taster

=94/6

polymorphism

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over