rs387906536

chr12-69350215-T-Achr12-69350215-T-C

Variant summary

Our verdict is Pathogenic. Variant got 14 ACMG points: 14P and 0B. PS1 PM1 PM2 PP3_Strong PP5_Moderate

The NM_000239.3(LYZ):c.244T>A(p.Trp82Arg) variant causes a missense change. 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 Pathogenic (★). Another nucleotide change resulting in same amino acid change has been previously reported as Pathogenicin ClinVar.

• Frequency: Genomes: not found (cov: 32)
• Consequence: LYZ NM_000239.3 missense
• Clinical Significance: Pathogenic criteria provided, single submitter P:2
• Conservation: PhyloP100: 6.53

Genes affected

LYZ (HGNC:6740): (lysozyme) This gene encodes human lysozyme, whose natural substrate is the bacterial cell wall peptidoglycan (cleaving the beta[1-4]glycosidic linkages between N-acetylmuramic acid and N-acetylglucosamine). Lysozyme is one of the antimicrobial agents found in human milk, and is also present in spleen, lung, kidney, white blood cells, plasma, saliva, and tears. The protein has antibacterial activity against a number of bacterial species. Missense mutations in this gene have been identified in heritable renal amyloidosis. [provided by RefSeq, Oct 2014]

ACMG classification

Verdict is Pathogenic. Variant got 14 ACMG points.

• PS1: Transcript NM_000239.3 (LYZ) is affected with MISSENSE_VARIANT having same AA change as one Pathogenic present in ClinVar as 14376
• PM1: In a disulfide_bond (size 86) in uniprot entity LYSC_HUMAN there are 6 pathogenic changes around while only 1 benign (86%) in NM_000239.3
• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.976
• PP5: Variant 12-69350215-T-A is Pathogenic according to our data. Variant chr12-69350215-T-A is described in ClinVar as [Pathogenic]. Clinvar id is 14378.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
LYZ	NM_000239.3	c.244T>A	p.Trp82Arg	missense_variant	2/4	ENST00000261267.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
LYZ	ENST00000261267.7	c.244T>A	p.Trp82Arg	missense_variant	2/4	1	NM_000239.3	P1
LYZ	ENST00000549690.1	c.244T>A	p.Trp82Arg	missense_variant	2/3	2
LYZ	ENST00000548839.1	c.244T>A	p.Trp82Arg	missense_variant	2/2	2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:2

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Invitae

Dec 30, 2022

For these reasons, this variant has been classified as Pathogenic. Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be disruptive. ClinVar contains an entry for this variant (Variation ID: 14378). This variant is also known as W64R. This missense change has been observed in individuals with gastrointestinal amyloidosis (PMID: 12360495, 25217048). It has also been observed to segregate with disease in related individuals. This variant is not present in population databases (gnomAD no frequency). This sequence change replaces tryptophan, which is neutral and slightly polar, with arginine, which is basic and polar, at codon 82 of the LYZ protein (p.Trp82Arg). -

Familial visceral amyloidosis, Ostertag type Pathogenic:1

Pathogenic, no assertion criteria provided

literature only

OMIM

Jan 01, 2006

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.97
BayesDel_addAF	Pathogenic	0.40	D
BayesDel_noAF	Pathogenic	0.33
Cadd	Uncertain	25
Dann	Uncertain	1.0
DEOGEN2	Benign	0.42	T;.;.
Eigen	Pathogenic	0.83
Eigen_PC	Pathogenic	0.71
FATHMM_MKL	Uncertain	0.93	D
LIST_S2	Uncertain	0.87	D;D;D
M_CAP	Benign	0.085	D
MetaRNN	Pathogenic	0.98	D;D;D
MetaSVM	Uncertain	0.74	D
MutationAssessor	Pathogenic	4.3	H;.;.
MutationTaster	Benign	1.0	D;D;D
PrimateAI	Uncertain	0.55	T
PROVEAN	Pathogenic	-14	D;D;D
REVEL	Pathogenic	0.72
Sift	Pathogenic	0.0	D;D;D
Sift4G	Pathogenic	0.0	D;D;D
Polyphen		1.0	D;.;.
Vest4		0.96
MutPred		0.84		Gain of catalytic residue at W82 (P = 0.003);Gain of catalytic residue at W82 (P = 0.003);Gain of catalytic residue at W82 (P = 0.003);
MVP		0.96
MPC		1.2
ClinPred		1.0	D
GERP RS		5.9
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.95
gMVP		0.99

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

Other links and lift over

dbSNP: rs387906536; hg19: chr12-69743995;