18-74560662-C-T

Position:

• chr18-74560662-C-T

Variant summary

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

The NM_032649.6(CNDP1):​c.304-194C>T variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0344 in 151,344 control chromosomes in the GnomAD database, including 308 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 0.034 (308 hom., cov: 31)
• Consequence: CNDP1 NM_032649.6 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.568

Genes affected

CNDP1 (HGNC:20675): (carnosine dipeptidase 1) This gene encodes a member of the M20 metalloprotease family. The encoded protein is specifically expressed in the brain, is a homodimeric dipeptidase which was identified as human carnosinase. This gene contains trinucleotide (CTG) repeat length polymorphism in the coding region. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Benign. Variant got -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.84).
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.115 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
CNDP1	NM_032649.6	c.304-194C>T		intron_variant		ENST00000358821.8	NP_116038.4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CNDP1	ENST00000358821.8	c.304-194C>T		intron_variant		1	NM_032649.6	ENSP00000351682	P1
CNDP1	ENST00000582365.1	c.175-194C>T		intron_variant		5		ENSP00000462096
CNDP1	ENST00000585136.1	n.468+1190C>T		intron_variant, non_coding_transcript_variant		3

Frequencies

GnomAD3 genomes AF: 0.0343 AC: 5187 AN: 151226 Hom.: 306 Cov.: 31

Gnomad AFR AF: 0.118

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0169

Gnomad ASJ AF: 0.000289

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000629

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.0128

Gnomad NFE AF: 0.000442

Gnomad OTH AF: 0.0279

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

GnomAD4 genome AF: 0.0344 AC: 5206 AN: 151344 Hom.: 308 Cov.: 31 AF XY: 0.0340 AC XY: 2510 AN XY: 73890

Gnomad4 AFR AF: 0.118

Gnomad4 AMR AF: 0.0168

Gnomad4 ASJ AF: 0.000289

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.000420

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.000442

Gnomad4 OTH AF: 0.0276

Alfa AF: 0.0286 Hom.: 20

Bravo AF: 0.0389

Asia WGS AF: 0.00837 AC: 29 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.84
CADD	Benign	2.9
DANN	Benign	0.56

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: rs9955580; hg19: chr18-72227897;