NM_000049.4:c.654C>T

Variant names:

• chr17-3494369-C-T
• rs104894549
• NM_000049.4:c.654C>T

Variant summary

Our verdict is Benign. The variant received -9 ACMG points: 2P and 11B. PM2 BP4_Moderate BP6_Very_Strong BP7

The NM_000049.4(ASPA):​c.654C>T​(p.Cys218Cys) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000329 in 1,611,052 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 Likely benign (★★).

• Frequency:
  • Genomes: 𝑓 0.000020 (0 hom., cov: 31)
  • Exomes 𝑓: 0.000034 (0 hom.)
• Consequence: ASPA NM_000049.4 synonymous
• Clinical Significance: Likely benign criteria provided, multiple submitters, no conflicts B:3
• Conservation: PhyloP100: -0.0230
• Publications: 4 publications found

Genes affected

ASPA (HGNC:756): (aspartoacylase) This gene encodes an enzyme that catalyzes the conversion of N-acetyl_L-aspartic acid (NAA) to aspartate and acetate. NAA is abundant in the brain where hydrolysis by aspartoacylase is thought to help maintain white matter. This protein is an NAA scavenger in other tissues. Mutations in this gene cause Canavan disease. Alternatively spliced transcript variants have been found for this gene. [provided by RefSeq, Jul 2008]

SPATA22 (HGNC:30705): (spermatogenesis associated 22) Predicted to be involved in regulation of meiotic cell cycle. Predicted to act upstream of or within several processes, including fertilization; gamete generation; and meiosis I cell cycle process. Predicted to be located in chromosome. [provided by Alliance of Genome Resources, Apr 2022]

SPATA22 Gene-Disease associations (from GenCC):

• genetic infertility

  Inheritance: AR Classification: MODERATE Submitted by: PanelApp Australia
• infertility disorder

  Inheritance: AR Classification: MODERATE Submitted by: Ambry Genetics

ACMG classification

Our verdict: Benign. The variant received -9 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.31).
• BP6: Variant 17-3494369-C-T is Benign according to our data. Variant chr17-3494369-C-T is described in ClinVar as Likely_benign. ClinVar VariationId is 1082180.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BP7: Synonymous conserved (PhyloP=-0.023 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000049.4. 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
	ASPA	NM_000049.4	MANE Select	c.654C>T	p.Cys218Cys	synonymous	Exon 5 of 6	NP_000040.1	Q6FH48
	ASPA	NM_001128085.1		c.654C>T	p.Cys218Cys	synonymous	Exon 6 of 7	NP_001121557.1	P45381
	SPATA22	NM_001321337.2		c.-74+19043G>A		intron	N/A	NP_001308266.1	A0A140VJV9

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ASPA	ENST00000263080.3	TSL:1 MANE Select	c.654C>T	p.Cys218Cys	synonymous	Exon 5 of 6	ENSP00000263080.2	P45381
	ASPA	ENST00000456349.6	TSL:1	c.654C>T	p.Cys218Cys	synonymous	Exon 6 of 7	ENSP00000409976.2	P45381
	ASPA	ENST00000858436.1		c.654C>T	p.Cys218Cys	synonymous	Exon 6 of 7	ENSP00000528495.1

Frequencies

GnomAD3 genomes AF: 0.0000197 AC: 3 AN: 152112 Hom.: 0 Cov.: 31

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000131

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: 0.0000147

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.0000239 AC: 6 AN: 251460 AF XY: 0.0000368

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.0000544

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000440

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000343 AC: 50 AN: 1458940 Hom.: 0 Cov.: 30 AF XY: 0.0000317 AC XY: 23 AN XY: 726004

African (AFR) AF: 0.0000299 AC: 1 AN: 33430

American (AMR) AF: 0.0000447 AC: 2 AN: 44712

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26108

East Asian (EAS) AF: 0.0000252 AC: 1 AN: 39694

South Asian (SAS) AF: 0.0000348 AC: 3 AN: 86212

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53392

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5758

European-Non Finnish (NFE) AF: 0.0000379 AC: 42 AN: 1109338

Other (OTH) AF: 0.0000166 AC: 1 AN: 60296

GnomAD4 genome AF: 0.0000197 AC: 3 AN: 152112 Hom.: 0 Cov.: 31 AF XY: 0.0000135 AC XY: 1 AN XY: 74308

African (AFR) AF: 0.00 AC: 0 AN: 41418

American (AMR) AF: 0.000131 AC: 2 AN: 15266

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3470

East Asian (EAS) AF: 0.00 AC: 0 AN: 5192

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

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10598

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

European-Non Finnish (NFE) AF: 0.0000147 AC: 1 AN: 68022

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

Alfa AF: 0.0000335 Hom.: 0

Bravo AF: 0.0000416

ClinVar

ClinVar submissions

Significance: Likely benign

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
-	-	1	ASPA-related disorder (1)
-	-	1	Inborn genetic diseases (1)
-	-	1	Spongy degeneration of central nervous system (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.31
CADD	Benign	12
DANN	Benign	0.80
PhyloP100		-0.023
Mutation Taster		=100/0	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.030		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: rs104894549; hg19: chr17-3397663;