rs2121337

Positions:

• chr2-134843355-T-C

Variant summary

Our verdict is Benign. Variant got -12 ACMG points: 0P and 12B. BP4_Strong BA1

The NM_138326.3(ACMSD):​c.58-1878T>C variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.215 in 152,050 control chromosomes in the GnomAD database, including 3,989 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: 𝑓 0.22 (3989 hom., cov: 32)
• Consequence: ACMSD NM_138326.3 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.794

Genes affected

ACMSD (HGNC:19288): (aminocarboxymuconate semialdehyde decarboxylase) The neuronal excitotoxin quinolinate is an intermediate in the de novo synthesis pathway of NAD from tryptophan, and has been implicated in the pathogenesis of several neurodegenerative disorders. Quinolinate is derived from alpha-amino-beta-carboxy-muconate-epsilon-semialdehyde (ACMS). ACMSD (ACMS decarboxylase; EC 4.1.1.45) can divert ACMS to a benign catabolite and thus prevent the accumulation of quinolinate from ACMS.[supplied by OMIM, Oct 2004]

CCNT2-AS1 (HGNC:40130): (CCNT2 antisense RNA 1)

ACMG classification

Verdict is Benign. Variant got -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.9).
• BA1: GnomAd4 highest subpopulation (AMR) allele frequency at 95% confidence interval = 0.268 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
ACMSD	NM_138326.3	c.58-1878T>C		intron_variant		ENST00000356140.10	NP_612199.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
ACMSD	ENST00000356140.10	c.58-1878T>C		intron_variant		1	NM_138326.3	ENSP00000348459	P1
CCNT2-AS1	ENST00000392929.6	n.426+24165A>G		intron_variant, non_coding_transcript_variant		4

Frequencies

GnomAD3 genomes AF: 0.215 AC: 32693 AN: 151930 Hom.: 3989 Cov.: 32

Gnomad AFR AF: 0.160

Gnomad AMI AF: 0.270

Gnomad AMR AF: 0.275

Gnomad ASJ AF: 0.432

Gnomad EAS AF: 0.0995

Gnomad SAS AF: 0.221

Gnomad FIN AF: 0.254

Gnomad MID AF: 0.582

Gnomad NFE AF: 0.223

Gnomad OTH AF: 0.265

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.215 AC: 32711 AN: 152050 Hom.: 3989 Cov.: 32 AF XY: 0.220 AC XY: 16367 AN XY: 74334

Gnomad4 AFR AF: 0.159

Gnomad4 AMR AF: 0.275

Gnomad4 ASJ AF: 0.432

Gnomad4 EAS AF: 0.100

Gnomad4 SAS AF: 0.222

Gnomad4 FIN AF: 0.254

Gnomad4 NFE AF: 0.223

Gnomad4 OTH AF: 0.268

Alfa AF: 0.245 Hom.: 4748

Bravo AF: 0.211

Asia WGS AF: 0.155 AC: 536 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.90
CADD	Benign	8.2
DANN	Benign	0.51

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

LitVar

Other links and lift over

dbSNP: rs2121337; hg19: chr2-135600925;