19-50908390-C-T

Position:

• chr19-50908390-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_004917.5(KLK4):​c.581G>A​(p.Gly194Asp) 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 pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: KLK4 NM_004917.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.25

Genes affected

KLK4 (HGNC:6365): (kallikrein related peptidase 4) Kallikreins are a subgroup of serine proteases having diverse physiological functions. Growing evidence suggests that many kallikreins are implicated in carcinogenesis and some have potential as novel cancer and other disease biomarkers. This gene is one of the fifteen kallikrein subfamily members located in a cluster on chromosome 19. In some tissues its expression is hormonally regulated. The expression pattern of a similar mouse protein in murine developing teeth supports a role for the protein in the degradation of enamel proteins. Several transcript variants encoding different proteins have been found for this gene. [provided by RefSeq, Dec 2014]

ACMG classification

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, 0.858

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
KLK4	NM_004917.5	c.581G>A	p.Gly194Asp	missense_variant	5/6	ENST00000324041.6	NP_004908.4
KLK4	NM_001302961.2	c.296G>A	p.Gly99Asp	missense_variant	4/5		NP_001289890.1
KLK4	XM_011527545.4	c.*76G>A		3_prime_UTR_variant	4/4		XP_011525847.1
KLK4	NR_126566.2	n.570G>A		non_coding_transcript_exon_variant	4/5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
KLK4	ENST00000324041.6	c.581G>A	p.Gly194Asp	missense_variant	5/6	1	NM_004917.5	ENSP00000326159.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Inborn genetic diseases Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Mar 16, 2022

The c.581G>A (p.G194D) alteration is located in exon 4 (coding exon 4) of the KLK4 gene. This alteration results from a G to A substitution at nucleotide position 581, causing the glycine (G) at amino acid position 194 to be replaced by an aspartic acid (D). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.77
BayesDel_addAF	Pathogenic	0.24	D
BayesDel_noAF	Uncertain	0.11
CADD	Benign	21
DANN	Uncertain	1.0
Eigen	Benign	0.15
Eigen_PC	Benign	-0.10
FATHMM_MKL	Benign	0.19	N
LIST_S2	Benign	0.75	T
M_CAP	Benign	0.032	D
MetaRNN	Pathogenic	0.86	D
MetaSVM	Pathogenic	0.89	D
PrimateAI	Uncertain	0.55	T
PROVEAN	Pathogenic	-4.5	D
REVEL	Uncertain	0.64
Sift	Uncertain	0.0020	D
Sift4G	Uncertain	0.0040	D
Vest4		0.32
MutPred		0.85		Gain of disorder (P = 0.1426);
MVP		0.92
MPC		1.2
ClinPred		0.94	D
GERP RS		3.7
gMVP		0.87

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr19-51411646;