rs879255248

Variant names:

• chr19-5696253-G-T
• rs879255248
• NM_004793.4:c.1892C>A

Variant summary

Our verdict is Uncertain significance. The variant received 5 ACMG points: 5P and 0B. PP3_Strong PP5

The NM_004793.4(LONP1):​c.1892C>A​(p.Ser631Tyr) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000011 in 1,460,956 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. 13/22 in silico tools predict a damaging outcome for this variant. Variant has been reported in ClinVar as Pathogenic (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. S631A) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.000011 (0 hom.)
• Consequence: LONP1 NM_004793.4 missense
• Clinical Significance: Pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 9.27
• Publications: 3 publications found

Genes affected

LONP1 (HGNC:9479): (lon peptidase 1, mitochondrial) This gene encodes a mitochondrial matrix protein that belongs to the Lon family of ATP-dependent proteases. This protein mediates the selective degradation of misfolded, unassembled or oxidatively damaged polypeptides in the mitochondrial matrix. It may also have a chaperone function in the assembly of inner membrane protein complexes, and participate in the regulation of mitochondrial gene expression and maintenance of the integrity of the mitochondrial genome. Decreased expression of this gene has been noted in a patient with hereditary spastic paraplegia (PMID:18378094). Alternatively spliced transcript variants have been found for this gene. [provided by RefSeq, Feb 2013]

LONP1 Gene-Disease associations (from GenCC):

• CODAS syndrome

  Inheritance: AR Classification: STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Genomics England PanelApp, Ambry Genetics, Orphanet, G2P
• pyruvate dehydrogenase E1-alpha deficiency

  Inheritance: XL Classification: SUPPORTIVE Submitted by: Orphanet
• congenital diaphragmatic hernia

  Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics, G2P
• mitochondrial encephalomyopathy

  Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics
• Leigh syndrome

  Inheritance: AR Classification: LIMITED Submitted by: ClinGen

ACMG classification

Our verdict: Uncertain_significance. The variant received 5 ACMG points.

• PP3: MetaRNN computational evidence supports a deleterious effect, 0.978
• PP5: Variant 19-5696253-G-T is Pathogenic according to our data. Variant chr19-5696253-G-T is described in ClinVar as Pathogenic. ClinVar VariationId is 180659.Status of the report is no_assertion_criteria_provided, 0 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_004793.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	LONP1	NM_004793.4	MANE Select	c.1892C>A	p.Ser631Tyr	missense	Exon 12 of 18	NP_004784.2
	LONP1	NM_001276479.2		c.1700C>A	p.Ser567Tyr	missense	Exon 13 of 19	NP_001263408.1
	LONP1	NM_001276480.1		c.1304C>A	p.Ser435Tyr	missense	Exon 12 of 18	NP_001263409.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	LONP1	ENST00000360614.8	TSL:1 MANE Select	c.1892C>A	p.Ser631Tyr	missense	Exon 12 of 18	ENSP00000353826.2
	LONP1	ENST00000590729.5	TSL:1	c.1502C>A	p.Ser501Tyr	missense	Exon 12 of 18	ENSP00000465139.1
	LONP1	ENST00000593119.5	TSL:2	c.1700C>A	p.Ser567Tyr	missense	Exon 13 of 19	ENSP00000468541.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.0000110 AC: 16 AN: 1460956 Hom.: 0 Cov.: 34 AF XY: 0.0000110 AC XY: 8 AN XY: 726822

African (AFR) AF: 0.00 AC: 0 AN: 33476

American (AMR) AF: 0.00 AC: 0 AN: 44698

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26102

East Asian (EAS) AF: 0.00 AC: 0 AN: 39694

South Asian (SAS) AF: 0.00 AC: 0 AN: 86254

European-Finnish (FIN) AF: 0.0000190 AC: 1 AN: 52734

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5764

European-Non Finnish (NFE) AF: 0.0000135 AC: 15 AN: 1111866

Other (OTH) AF: 0.00 AC: 0 AN: 60368

GnomAD4 genome Cov.: 32

ClinVar

ClinVar submissions as Germline

Significance: Pathogenic

Revision: no assertion criteria provided

Pathogenic	VUS	Benign	Condition
1	-	-	CODAS syndrome (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.94
BayesDel_addAF	Pathogenic	0.54	D
BayesDel_noAF	Pathogenic	0.53
CADD	Pathogenic	31
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.92	D
Eigen	Pathogenic	1.0
Eigen_PC	Pathogenic	0.89
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Pathogenic	0.99	D
M_CAP	Pathogenic	0.87	D
MetaRNN	Pathogenic	0.98	D
MetaSVM	Pathogenic	1.1	D
MutationAssessor	Pathogenic	5.1	H
PhyloP100		9.3
PrimateAI	Pathogenic	0.83	D
PROVEAN	Pathogenic	-5.9	D
REVEL	Pathogenic	0.99
Sift	Pathogenic	0.0	D
Sift4G	Pathogenic	0.0	D
Polyphen		1.0	D
Vest4		0.99
MutPred		0.82		Loss of sheet (P = 0.0315)
MVP		0.97
MPC		1.2
ClinPred		1.0	D
GERP RS		4.8
RBP_binding_hub_radar		1.1
RBP_regulation_power_radar		2.8
Varity_R		0.87
gMVP		0.91
Mutation Taster		=0/100	disease causing (ClinVar)

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		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: rs879255248; hg19: chr19-5696264;