NM_030813.6:c.1772C>A

Variant names:

• chr11-72294125-G-T
• rs748010262
• NM_030813.6:c.1772C>A

Variant summary

Our verdict is Uncertain significance. The variant received 5 ACMG points: 5P and 0B. PM2 PM5 PP3

The NM_030813.6(CLPB):​c.1772C>A​(p.Ala591Asp) variant causes a missense, splice region change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,566 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. 15/24 in silico tools predict a damaging outcome for this variant. 2/3 splice prediction tools predicting alterations to normal splicing. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A591V) has been classified as Pathogenic.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: CLPB NM_030813.6 missense, splice_region
• Scores: Splicing: ADA: 0.9874
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 9.69
• Publications: 8 publications found

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 Gene-Disease associations (from GenCC):

• 3-methylglutaconic aciduria, type VIIB

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, G2P, Ambry Genetics, Labcorp Genetics (formerly Invitae)
• neutropenia, severe congenital, 9, autosomal dominant

  Inheritance: AD Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)
• Leigh syndrome

  Inheritance: AR Classification: LIMITED Submitted by: ClinGen

ENSG00000255843 (HGNC:):

ACMG classification

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

• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr11-72294125-G-A is described in ClinVar as Pathogenic. ClinVar VariationId is 187782.Status of the report is no_assertion_criteria_provided, 0 stars.
• PP3: Splicing predictors support a deleterious effect. Scorers claiming Pathogenic: dbscSNV1_ADA, dbscSNV1_RF. No scorers claiming Uncertain. Scorers claiming Benign: max_spliceai.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_030813.6. 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
	CLPB	NM_030813.6	MANE Plus Clinical	c.1772C>A	p.Ala591Asp	missense splice_region	Exon 16 of 17	NP_110440.1
	CLPB	NM_001258392.3	MANE Select	c.1682C>A	p.Ala561Asp	missense splice_region	Exon 15 of 16	NP_001245321.1
	CLPB	NM_001258394.3		c.1637C>A	p.Ala546Asp	missense splice_region	Exon 17 of 18	NP_001245323.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CLPB	ENST00000294053.9	TSL:1 MANE Plus Clinical	c.1772C>A	p.Ala591Asp	missense splice_region	Exon 16 of 17	ENSP00000294053.3
	CLPB	ENST00000538039.6	TSL:2 MANE Select	c.1682C>A	p.Ala561Asp	missense splice_region	Exon 15 of 16	ENSP00000441518.1
	CLPB	ENST00000538021.5	TSL:1	n.*471C>A		splice_region non_coding_transcript_exon	Exon 8 of 9	ENSP00000445180.2

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461566 Hom.: 0 Cov.: 32 AF XY: 0.00000138 AC XY: 1 AN XY: 727060

African (AFR) AF: 0.00 AC: 0 AN: 33474

American (AMR) AF: 0.00 AC: 0 AN: 44700

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26124

East Asian (EAS) AF: 0.00 AC: 0 AN: 39688

South Asian (SAS) AF: 0.0000116 AC: 1 AN: 86212

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53394

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1111822

Other (OTH) AF: 0.00 AC: 0 AN: 60384

GnomAD4 genome Cov.: 33

ExAC AF: 0.00000824 AC: 1

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.19	D
BayesDel_noAF	Pathogenic	0.14
CADD	Pathogenic	34
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.79	D
Eigen	Pathogenic	0.95
Eigen_PC	Pathogenic	0.91
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Uncertain	0.97	D
M_CAP	Pathogenic	0.54	D
MetaRNN	Pathogenic	0.93	D
MetaSVM	Benign	-0.56	T
MutationAssessor	Uncertain	2.5	M
PhyloP100		9.7
PrimateAI	Pathogenic	0.86	D
PROVEAN	Pathogenic	-5.8	D
REVEL	Pathogenic	0.71
Sift	Uncertain	0.0040	D
Sift4G	Uncertain	0.032	D
Polyphen		1.0	D
Vest4		0.96
MutPred		0.78		Loss of MoRF binding (P = 0.04)
MVP		0.64
MPC		1.5
ClinPred		0.99	D
GERP RS		5.4
Varity_R		0.98
gMVP		0.97
Mutation Taster		=10/90	disease causing

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Pathogenic	0.99
dbscSNV1_RF	Pathogenic	0.85
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

Other links and lift over

dbSNP: rs748010262; hg19: chr11-72005169;