NM_018136.5:c.7074A>G

Variant names:

• chr1-197102177-T-C
• rs587783262
• NM_018136.5:c.7074A>G

Variant summary

Our verdict is Likely benign. The variant received -4 ACMG points: 2P and 6B. PM2 BP4_Strong BP6 BP7

The NM_018136.5(ASPM):​c.7074A>G​(p.Lys2358Lys) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000781 in 1,612,706 control chromosomes in the GnomAD database, with no homozygous occurrence. 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 0.000026 (0 hom., cov: 32)
  • Exomes 𝑓: 0.000084 (0 hom.)
• Consequence: ASPM NM_018136.5 synonymous
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1 B:2
• Conservation: PhyloP100: -0.636
• Publications: 0 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):

• autosomal recessive primary microcephaly

  Inheritance: AR Classification: DEFINITIVE, SUPPORTIVE Submitted by: Orphanet, ClinGen
• microcephaly 5, primary, autosomal recessive

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), G2P

ENSG00000300054 (HGNC:):

ACMG classification

Our verdict: Likely_benign. The variant received -4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.85).
• BP6: Variant 1-197102177-T-C is Benign according to our data. Variant chr1-197102177-T-C is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 157863.
• BP7: Synonymous conserved (PhyloP=-0.636 with no splicing effect.

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

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ASPM	NM_018136.5	MANE Select	c.7074A>G	p.Lys2358Lys	synonymous	Exon 18 of 28	NP_060606.3
	ASPM	NM_001206846.2		c.4066-6013A>G		intron	N/A	NP_001193775.1	Q8IZT6-2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ASPM	ENST00000367409.9	TSL:1 MANE Select	c.7074A>G	p.Lys2358Lys	synonymous	Exon 18 of 28	ENSP00000356379.4	Q8IZT6-1
	ASPM	ENST00000294732.11	TSL:1	c.4066-6013A>G		intron	N/A	ENSP00000294732.7	Q8IZT6-2
	ASPM	ENST00000367408.6	TSL:1	n.2108-6013A>G		intron	N/A

Frequencies

GnomAD3 genomes AF: 0.0000264 AC: 4 AN: 151774 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.0000242

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

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: 0.0000442

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.0000280 AC: 7 AN: 249932 AF XY: 0.0000148

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000290

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000533

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000835 AC: 122 AN: 1460932 Hom.: 0 Cov.: 42 AF XY: 0.0000826 AC XY: 60 AN XY: 726752

African (AFR) AF: 0.00 AC: 0 AN: 33420

American (AMR) AF: 0.00 AC: 0 AN: 44604

Ashkenazi Jewish (ASJ) AF: 0.0000383 AC: 1 AN: 26080

East Asian (EAS) AF: 0.00 AC: 0 AN: 39684

South Asian (SAS) AF: 0.00 AC: 0 AN: 86228

European-Finnish (FIN) AF: 0.0000562 AC: 3 AN: 53374

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5754

European-Non Finnish (NFE) AF: 0.000103 AC: 115 AN: 1111444

Other (OTH) AF: 0.0000497 AC: 3 AN: 60344

GnomAD4 genome AF: 0.0000264 AC: 4 AN: 151774 Hom.: 0 Cov.: 32 AF XY: 0.0000270 AC XY: 2 AN XY: 74126

African (AFR) AF: 0.0000242 AC: 1 AN: 41368

American (AMR) AF: 0.00 AC: 0 AN: 15174

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3460

East Asian (EAS) AF: 0.00 AC: 0 AN: 5164

South Asian (SAS) AF: 0.00 AC: 0 AN: 4828

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10620

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 316

European-Non Finnish (NFE) AF: 0.0000442 AC: 3 AN: 67844

Other (OTH) AF: 0.00 AC: 0 AN: 2090

Alfa AF: 0.000136 Hom.: 0

Bravo AF: 0.0000604

EpiCase AF: 0.00

EpiControl AF: 0.0000593

ClinVar

ClinVar submissions

Significance: Conflicting classifications of pathogenicity

Revision: criteria provided, conflicting classifications

Pathogenic	VUS	Benign	Condition
-	-	1	ASPM-related disorder (1)
-	1	-	Microcephaly 5, primary, autosomal recessive (1)
-	-	1	not provided (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.85
CADD	Benign	0.71
DANN	Benign	0.47
PhyloP100		-0.64
Mutation Taster		=100/0	polymorphism

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: rs587783262; hg19: chr1-197071307; COSMIC: COSV54134491;