rs267606763

Positions:

• chr10-97584912-G-A
• chr10-97584912-G-C

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 4P and 1B. PM1 PM5 BP4

The NM_138413.4(HOGA1):​c.209G>A​(p.Arg70Gln) variant causes a missense, splice region change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000013 in 1,461,500 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R70P) has been classified as Pathogenic.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.000013 (0 hom.)
• Consequence: HOGA1 NM_138413.4 missense, splice_region
• Scores: Splicing: ADA: 0.002995
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 2.80

Genes affected

HOGA1 (HGNC:25155): (4-hydroxy-2-oxoglutarate aldolase 1) The authors of PMID:20797690 cloned this gene while searching for genes in a region of chromosome 10 linked to primary hyperoxalurea type III. They noted that even though the encoded protein has been described as a mitochondrial dihydrodipicolinate synthase-like enzyme, it shares little homology with E. coli dihydrodipicolinate synthase (Dhdps), particularly in the putative substrate-binding region. Moreover, neither lysine biosynthesis nor sialic acid metabolism, for which Dhdps is responsible, occurs in vertebrate mitochondria. They propose that this gene encodes mitochondrial 4-hydroxyl-2-oxoglutarate aldolase (EC 4.1.3.16), which catalyzes the final step in the metabolic pathway of hydroxyproline, releasing glyoxylate and pyruvate. This gene is predominantly expressed in the liver and kidney, and mutations in this gene are found in patients with primary hyperoxalurea type III. Alternatively spliced transcript variants encoding different isoforms have been noted for this gene. [provided by RefSeq, Nov 2010]

ACMG classification

Verdict is Uncertain_significance. Variant got 3 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, 2 uncertain in NM_138413.4
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr10-97584912-G-C is described in ClinVar as [Pathogenic]. Clinvar id is 33.Status of the report is criteria_provided_single_submitter, 1 stars.
• BP4: Computational evidence support a benign effect (MetaRNN=0.3761897).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
HOGA1	NM_138413.4	c.209G>A	p.Arg70Gln	missense_variant, splice_region_variant	1/7	ENST00000370646.9
HOGA1	NM_001134670.2	c.209G>A	p.Arg70Gln	missense_variant, splice_region_variant	1/3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
HOGA1	ENST00000370646.9	c.209G>A	p.Arg70Gln	missense_variant, splice_region_variant	1/7	1	NM_138413.4	P1
HOGA1	ENST00000370647.8	c.209G>A	p.Arg70Gln	missense_variant, splice_region_variant	1/3	1
HOGA1	ENST00000465608.1	n.590G>A		splice_region_variant, non_coding_transcript_exon_variant	1/3	2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD3 exomes AF: 0.00000403 AC: 1 AN: 248042 Hom.: 0 AF XY: 0.00000744 AC XY: 1 AN XY: 134320

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: 0.0000327

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000130 AC: 19 AN: 1461500 Hom.: 0 Cov.: 31 AF XY: 0.0000110 AC XY: 8 AN XY: 727070

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.000179

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000116

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000899

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

Alfa AF: 0.0000301 Hom.: 0

Bravo AF: 0.0000151

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Inborn genetic diseases Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jun 18, 2021

The c.209G>A (p.R70Q) alteration is located in exon 1 (coding exon 1) of the HOGA1 gene. This alteration results from a G to A substitution at nucleotide position 209, causing the arginine (R) at amino acid position 70 to be replaced by a glutamine (Q). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.10
BayesDel_addAF	Uncertain	0.041	T
BayesDel_noAF	Uncertain	-0.080
CADD	Benign	23
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.47	.;T;.
Eigen	Benign	0.080
Eigen_PC	Benign	0.14
FATHMM_MKL	Uncertain	0.78	D
LIST_S2	Benign	0.83	T;D;T
M_CAP	Uncertain	0.11	D
MetaRNN	Benign	0.26	T;T;T
MetaSVM	Uncertain	0.32	D
MutationAssessor	Uncertain	2.1	M;M;.
MutationTaster	Benign	1.0	N;D;N
PROVEAN	Benign	0.030	N;N;N
REVEL	Benign	0.28
Sift	Benign	0.27	T;T;D
Sift4G	Pathogenic	0.0	D;T;D
Polyphen		0.94	P;P;.
Vest4		0.41
MVP		0.72
MPC		0.090
ClinPred		0.38	T
GERP RS		3.4
Varity_R		0.27
gMVP		0.61

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Benign	0.0030
dbscSNV1_RF	Benign	0.048
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: rs267606763; hg19: chr10-99344669;