rs16858196

Positions:

• chr2-142882078-C-T

Variant summary

Our verdict is Benign. Variant got -12 ACMG points: 0P and 12B. BP4_Strong BS1 BS2

The NM_003937.3(KYNU):​c.-19-3271C>T variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0071 in 152,062 control chromosomes in the GnomAD database, including 16 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 0.0071 (16 hom., cov: 30)
• Consequence: KYNU NM_003937.3 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.596

Genes affected

KYNU (HGNC:6469): (kynureninase) Kynureninase is a pyridoxal-5'-phosphate (pyridoxal-P) dependent enzyme that catalyzes the cleavage of L-kynurenine and L-3-hydroxykynurenine into anthranilic and 3-hydroxyanthranilic acids, respectively. Kynureninase is involved in the biosynthesis of NAD cofactors from tryptophan through the kynurenine pathway. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Nov 2010]

ACMG classification

Verdict is Benign. Variant got -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.87).
• BS1: Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.0071 (1080/152062) while in subpopulation AFR AF= 0.0247 (1024/41482). AF 95% confidence interval is 0.0234. There are 16 homozygotes in gnomad4. There are 505 alleles in male gnomad4 subpopulation. Median coverage is 30. This position pass quality control queck.
• BS2: High Homozygotes in GnomAd4 at 16 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
KYNU	NM_003937.3	c.-19-3271C>T		intron_variant		ENST00000264170.9	NP_003928.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
KYNU	ENST00000264170.9	c.-19-3271C>T		intron_variant		1	NM_003937.3	ENSP00000264170	P1

Frequencies

GnomAD3 genomes AF: 0.00711 AC: 1080 AN: 151944 Hom.: 16 Cov.: 30

Gnomad AFR AF: 0.0248

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00256

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: 0.0000883

Gnomad OTH AF: 0.00528

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

GnomAD4 genome AF: 0.00710 AC: 1080 AN: 152062 Hom.: 16 Cov.: 30 AF XY: 0.00679 AC XY: 505 AN XY: 74342

Gnomad4 AFR AF: 0.0247

Gnomad4 AMR AF: 0.00256

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.0000883

Gnomad4 OTH AF: 0.00523

Alfa AF: 0.00655 Hom.: 2

Bravo AF: 0.00778

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.87
CADD	Benign	0.85
DANN	Benign	0.69

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		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: rs16858196; hg19: chr2-143639647;