rs1554865214

Variant names:

• chr10-89222522-G-A
• rs1554865214
• NM_000235.4:c.883C>T

Variant summary

Our verdict is Pathogenic. The variant received 19 ACMG points: 19P and 0B. PM1 PM2 PM5 PP2 PP3_Strong PP5_Very_Strong

The NM_000235.4(LIPA):​c.883C>T​(p.His295Tyr) variant causes a missense change involving the alteration of a 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 Likely pathogenic (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. H295N) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: LIPA NM_000235.4 missense
• Clinical Significance: Likely pathogenic criteria provided, multiple submitters, no conflicts P:3
• Conservation: PhyloP100: 8.93
• Publications: 1 publications found

Genes affected

LIPA (HGNC:6617): (lipase A, lysosomal acid type) This gene encodes lipase A, the lysosomal acid lipase (also known as cholesterol ester hydrolase). This enzyme functions in the lysosome to catalyze the hydrolysis of cholesteryl esters and triglycerides. Mutations in this gene can result in Wolman disease and cholesteryl ester storage disease. Alternatively spliced transcript variants have been found for this gene. [provided by RefSeq, Jan 2014]

LIPA Gene-Disease associations (from GenCC):

• lysosomal acid lipase deficiency

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Ambry Genetics, Genomics England PanelApp, ClinGen, Myriad Women’s Health, Labcorp Genetics (formerly Invitae)
• cholesteryl ester storage disease

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• Wolman disease

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Pathogenic. The variant received 19 ACMG points.

• PM1: In a hotspot region, there are 5 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 1 benign, 6 uncertain in NM_000235.4
• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr10-89222521-T-G is described in ClinVar as Likely_pathogenic. ClinVar VariationId is 2025546.Status of the report is criteria_provided_single_submitter, 1 stars.
• PP2: Missense variant in the gene, where a lot of missense mutations are associated with disease in ClinVar. The gene has 39 curated pathogenic missense variants (we use a threshold of 10). The gene has 5 curated benign missense variants. Gene score misZ: 0.22832 (below the threshold of 3.09). Trascript score misZ: 0.63421 (below the threshold of 3.09). GenCC associations: The gene is linked to cholesteryl ester storage disease, lysosomal acid lipase deficiency, Wolman disease.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.988
• PP5: Variant 10-89222522-G-A is Pathogenic according to our data. Variant chr10-89222522-G-A is described in ClinVar as Likely_pathogenic. ClinVar VariationId is 556192.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
LIPA	NM_000235.4	c.883C>T	p.His295Tyr	missense_variant	Exon 8 of 10	ENST00000336233.10	NP_000226.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
LIPA	ENST00000336233.10	c.883C>T	p.His295Tyr	missense_variant	Exon 8 of 10	1	NM_000235.4	ENSP00000337354.5
LIPA	ENST00000371837.5	c.715C>T	p.His239Tyr	missense_variant	Exon 7 of 9	2		ENSP00000360903.1
LIPA	ENST00000456827.5	c.535C>T	p.His179Tyr	missense_variant	Exon 6 of 8	3		ENSP00000413019.2
LIPA	ENST00000428800.5	c.*11C>T		downstream_gene_variant		1		ENSP00000388415.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 1456348 Hom.: 0 Cov.: 29 AF XY: 0.00 AC XY: 0 AN XY: 724984

African (AFR) AF: 0.00 AC: 0 AN: 33348

American (AMR) AF: 0.00 AC: 0 AN: 44718

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26098

East Asian (EAS) AF: 0.00 AC: 0 AN: 39666

South Asian (SAS) AF: 0.00 AC: 0 AN: 86148

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53402

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5760

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1106990

Other (OTH) AF: 0.00 AC: 0 AN: 60218

GnomAD4 genome Cov.: 32

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000378

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:3

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Cholesteryl ester storage disease;C0043208:Wolman disease Pathogenic:1

May 13, 2024

Fulgent Genetics, Fulgent Genetics

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Wolman disease Pathogenic:1

May 01, 2024

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Variant summary: LIPA c.883C>T (p.His295Tyr) results in a conservative amino acid change in the Alpha/beta hydrolase fold-1 domain (IPR000073) of the encoded protein sequence. Four of five in-silico tools predict a damaging effect of the variant on protein function. The variant was absent in 251260 control chromosomes. c.883C>T has been reported in the literature in individuals affected with cholesteryl ester storage disease (Fasano_2012). These data indicate that the variant may be associated with disease. At least one publication reports experimental evidence evaluating an impact on protein function. The most pronounced variant effect results in little secretion of LIPA into the culturing medium in HepG2 cells (Vinje_2019). The following publications have been ascertained in the context of this evaluation (PMID: 22227072, 31131398). ClinVar contains an entry for this variant (Variation ID: 556192). Based on the evidence outlined above, the variant was classified as likely pathogenic. -

Cholesteryl ester storage disease Pathogenic:1

Jan 17, 2018

Counsyl

Significance: Likely pathogenic

Review Status: no assertion criteria provided

Collection Method: clinical testing

This submission and the accompanying classification are no longer maintained by the submitter. For more information on current observations and classification, please contact variantquestions@myriad.com. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.84
BayesDel_addAF	Pathogenic	0.43	D
BayesDel_noAF	Pathogenic	0.38
CADD	Pathogenic	28
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.51	D;.;T
Eigen	Pathogenic	0.74
Eigen_PC	Pathogenic	0.71
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.95	D;D;D
M_CAP	Uncertain	0.091	D
MetaRNN	Pathogenic	0.99	D;D;D
MetaSVM	Uncertain	0.38	D
MutationAssessor	Pathogenic	4.3	H;.;.
PhyloP100		8.9
PrimateAI	Uncertain	0.55	T
PROVEAN	Pathogenic	-5.7	D;D;.
REVEL	Pathogenic	0.85
Sift	Pathogenic	0.0	D;D;.
Sift4G	Pathogenic	0.0	D;D;D
Polyphen		1.0	D;D;.
Vest4		0.98
MutPred		0.97		Loss of disorder (P = 0.0419);.;.;
MVP		0.96
MPC		0.67
ClinPred		1.0	D
GERP RS		4.8
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.95
gMVP		0.93
Mutation Taster		=10/90	disease causing (ClinVar)

Splicing

Name	Calibrated prediction	Score	Prediction
Splicevardb		2.0
SpliceAI score (max)		0.070		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

dbSNP: rs1554865214; hg19: chr10-90982279;