2-142956222-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2PP3_Moderate

The NM_003937.3(KYNU):c.455C>T(p.Thr152Met) variant causes a missense change. The variant allele was found at a frequency of 0.0000576 in 1,597,968 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.000059 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000057 ( 1 hom. )

Consequence

KYNU
NM_003937.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:2

Conservation

PhyloP100: 6.63

Variant links:

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]

KYNU links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 4 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.86

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
KYNU	NM_003937.3 linkuse as main transcript	c.455C>T	p.Thr152Met	missense_variant	6/14	ENST00000264170.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
KYNU	ENST00000264170.9 linkuse as main transcript	c.455C>T	p.Thr152Met	missense_variant	6/14	1	NM_003937.3	P1	Q16719-1

Frequencies

GnomAD3 genomes

AF:

0.0000592

AC:

AN:

152116

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000121

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000441

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000759

AC:

AN:

250194

Hom.:

AF XY:

0.0000813

AC XY:

AN XY:

135258

show subpopulations

Gnomad AFR exome

AF:

0.000247

Gnomad AMR exome

AF:

0.0000871

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000218

Gnomad SAS exome

AF:

0.000131

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000177

Gnomad OTH exome

AF:

0.000328

GnomAD4 exome

AF:

0.0000574

AC:

AN:

1445734

Hom.:

Cov.:

AF XY:

0.0000583

AC XY:

AN XY:

720230

show subpopulations

Gnomad4 AFR exome

AF:

0.000151

Gnomad4 AMR exome

AF:

0.000112

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.000203

Gnomad4 SAS exome

AF:

0.000163

Gnomad4 FIN exome

AF:

0.0000189

Gnomad4 NFE exome

AF:

0.0000401

Gnomad4 OTH exome

AF:

0.000100

GnomAD4 genome

AF:

0.0000591

AC:

AN:

152234

Hom.:

Cov.:

AF XY:

0.0000269

AC XY:

AN XY:

74436

show subpopulations

Gnomad4 AFR

AF:

0.000120

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000207

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000441

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000993

Hom.:

Bravo

AF:

0.0000756

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.0000741

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Mar 02, 2023

The c.455C>T (p.T152M) alteration is located in exon 6 (coding exon 5) of the KYNU gene. This alteration results from a C to T substitution at nucleotide position 455, causing the threonine (T) at amino acid position 152 to be replaced by a methionine (M). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Vertebral, cardiac, renal, and limb defects syndrome 2

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

3billion

Jan 03, 2022

The variant observed at an extremely low frequency in the gnomAD v2.1.1 dataset (total allele frequency: 0.000071, PM2_M). In silico tool predictions suggest damaging effect of the variant on gene or gene product (REVEL: 0.683, 3CNET: 0.894, PP3_P). Therefore, this variant is classified as uncertain significance according to the recommendation of ACMG/AMP guideline. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.13

BayesDel_addAF

Uncertain

0.076

BayesDel_noAF

Pathogenic

0.16

Cadd

Pathogenic

Dann

Uncertain

1.0

DEOGEN2

Uncertain

0.74

D;.;D;.

Eigen

Pathogenic

0.82

Eigen_PC

Pathogenic

0.72

FATHMM_MKL

Pathogenic

0.97

M_CAP

Uncertain

0.12

MetaRNN

Pathogenic

0.86

D;D;D;D

MetaSVM

Pathogenic

0.91

MutationAssessor

Pathogenic

3.5

H;H;H;.

MutationTaster

Benign

1.0

D;D;D

PrimateAI

Uncertain

0.52

PROVEAN

Pathogenic

-5.2

D;D;D;.

REVEL

Pathogenic

0.68

Sift

Uncertain

0.0010

D;D;D;.

Sift4G

Pathogenic

0.0010

D;D;D;D

Polyphen

1.0

D;.;D;.

Vest4

0.78

MVP

0.97

MPC

0.27

ClinPred

0.89

GERP RS

4.8

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.83

gMVP

0.76

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

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over