rs748915609

Positions:

• chr11-72295567-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 1P and 0B. PP3

The NM_001258392.3(CLPB):​c.1411G>A​(p.Glu471Lys) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000889 in 1,461,840 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000089 (0 hom.)
• Consequence: CLPB NM_001258392.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1 O:1
• Conservation: PhyloP100: 7.88

Genes affected

CLPB (HGNC:30664): (ClpB family mitochondrial disaggregase) This gene belongs to the ATP-ases associated with diverse cellular activities (AAA+) superfamily. Members of this superfamily form ring-shaped homo-hexamers and have highly conserved ATPase domains that are involved in various processes including DNA replication, protein degradation and reactivation of misfolded proteins. All members of this family hydrolyze ATP through their AAA+ domains and use the energy generated through ATP hydrolysis to exert mechanical force on their substrates. In addition to an AAA+ domain, the protein encoded by this gene contains a C-terminal D2 domain, which is characteristic of the AAA+ subfamily of Caseinolytic peptidases to which this protein belongs. It cooperates with Hsp70 in the disaggregation of protein aggregates. Allelic variants of this gene are associated with 3-methylglutaconic aciduria, which causes cataracts and neutropenia. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Apr 2015]

CLPB (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PP3: MetaRNN computational evidence supports a deleterious effect, 0.773

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
CLPB	NM_030813.6	c.1501G>A	p.Glu501Lys	missense_variant	13/17	ENST00000294053.9	NP_110440.1
CLPB	NM_001258392.3	c.1411G>A	p.Glu471Lys	missense_variant	12/16	ENST00000538039.6	NP_001245321.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CLPB	ENST00000294053.9	c.1501G>A	p.Glu501Lys	missense_variant	13/17	1	NM_030813.6	ENSP00000294053.3
CLPB	ENST00000538039.6	c.1411G>A	p.Glu471Lys	missense_variant	12/16	2	NM_001258392.3	ENSP00000441518.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD3 exomes AF: 0.00000796 AC: 2 AN: 251182 Hom.: 0 AF XY: 0.00 AC XY: 0 AN XY: 135756

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000176

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000889 AC: 13 AN: 1461840 Hom.: 0 Cov.: 31 AF XY: 0.00000825 AC XY: 6 AN XY: 727220

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.0000504

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000899

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

Alfa AF: 0.0000450 Hom.: 0

Bravo AF: 0.00000378

ExAC AF: 0.00000824 AC: 1

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1 Other:1

Revision: criteria provided, single submitter

Submissions by phenotype

3-methylglutaconic aciduria, type VIIB Uncertain:1 Other:1

Uncertain significance, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jan 15, 2022	In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Tolerated"; PolyPhen-2: "Probably Damaging"; Align-GVGD: "Class C0"). ClinVar contains an entry for this variant (Variation ID: 279608). This missense change has been observed in individual(s) with CLPB deficiency who had two additional pathogenic variants in CLPB (PMID: 25597510). This variant is present in population databases (rs748915609, gnomAD 0.002%). This sequence change replaces glutamic acid, which is acidic and polar, with lysine, which is basic and polar, at codon 501 of the CLPB protein (p.Glu501Lys). -
not provided, no classification provided	literature only	GeneReviews	-	- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.35
BayesDel_addAF	Pathogenic	0.16	D
BayesDel_noAF	Uncertain	0.010
CADD	Pathogenic	29
DANN	Pathogenic	1.0
DEOGEN2	Uncertain	0.50	D;.;.;D;.;.;.
Eigen	Uncertain	0.36
Eigen_PC	Uncertain	0.31
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Uncertain	0.95	D;D;D;D;D;D;D
M_CAP	Uncertain	0.13	D
MetaRNN	Pathogenic	0.77	D;D;D;D;D;D;D
MetaSVM	Benign	-0.91	T
MutationAssessor	Benign	2.0	M;.;.;.;.;.;.
PrimateAI	Pathogenic	0.86	D
PROVEAN	Uncertain	-2.9	D;D;D;D;D;.;.
REVEL	Pathogenic	0.71
Sift	Benign	0.085	T;T;T;D;T;.;.
Sift4G	Benign	0.11	T;T;T;T;T;.;.
Polyphen		1.0	D;.;D;.;.;.;.
Vest4		0.89
MutPred		0.37		Gain of ubiquitination at E501 (P = 0.0289);.;.;.;.;.;.;
MVP		0.46
MPC		1.2
ClinPred		0.96	D
GERP RS		4.0
Varity_R		0.36
gMVP		0.80

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

LitVar

Other links and lift over

dbSNP: rs748915609; hg19: chr11-72006611;