NM_003679.5:c.1321C>T

Variant names:

• chr1-241592013-C-T
• NM_003679.5:c.1321C>T

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_003679.5(KMO):​c.1321C>T​(p.Leu441Phe) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 17/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: KMO NM_003679.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.655
• Publications: 0 publications found

Genes affected

KMO (HGNC:6381): (kynurenine 3-monooxygenase) This gene encodes a mitochondrion outer membrane protein that catalyzes the hydroxylation of L-tryptophan metabolite, L-kynurenine, to form L-3-hydroxykynurenine. Studies in yeast identified this gene as a therapeutic target for Huntington disease. [provided by RefSeq, Oct 2011]

OPN3 (HGNC:14007): (opsin 3) Opsins are members of the guanine nucleotide-binding protein (G protein)-coupled receptor superfamily. In addition to the visual opsins, mammals possess several photoreceptive non-visual opsins that are expressed in extraocular tissues. This gene, opsin 3, is strongly expressed in brain and testis and weakly expressed in liver, placenta, heart, lung, skeletal muscle, kidney, and pancreas. The gene may also be expressed in the retina. The protein has the canonical features of a photoreceptive opsin protein. [provided by RefSeq, Jul 2008]

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.1650509).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_003679.5. 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
	KMO	NM_003679.5	MANE Select	c.1321C>T	p.Leu441Phe	missense	Exon 15 of 15	NP_003670.2	O15229-1
	KMO	NM_001410944.1		c.1282C>T	p.Leu428Phe	missense	Exon 15 of 15	NP_001397873.1	O15229-2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	KMO	ENST00000366559.9	TSL:1 MANE Select	c.1321C>T	p.Leu441Phe	missense	Exon 15 of 15	ENSP00000355517.4	O15229-1
	KMO	ENST00000366558.7	TSL:1	c.1282C>T	p.Leu428Phe	missense	Exon 15 of 15	ENSP00000355516.3	O15229-2
	KMO	ENST00000881617.1		c.1384C>T	p.Leu462Phe	missense	Exon 16 of 16	ENSP00000551676.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	not specified (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.072
BayesDel_addAF	Benign	-0.13	T
BayesDel_noAF	Benign	-0.42
CADD	Benign	13
DANN	Benign	0.97
DEOGEN2	Benign	0.015	T
Eigen	Benign	-0.35
Eigen_PC	Benign	-0.49
FATHMM_MKL	Benign	0.087	N
LIST_S2	Benign	0.65	T
M_CAP	Benign	0.020	T
MetaRNN	Benign	0.17	T
MetaSVM	Benign	-0.90	T
MutationAssessor	Benign	1.6	L
PhyloP100		0.66
PrimateAI	Benign	0.36	T
PROVEAN	Benign	-0.76	N
REVEL	Benign	0.10
Sift	Benign	0.040	D
Sift4G	Benign	0.12	T
Polyphen		0.019	B
Vest4		0.12
MutPred		0.40		Gain of helix (P = 0.062)
MVP		0.50
MPC		0.40
ClinPred		0.14	T
GERP RS		2.5
Varity_R		0.051
gMVP		0.57
Mutation Taster		=75/25	polymorphism

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

Other links and lift over

hg19: chr1-241755315;