chr14-74058344-C-T

Variant names:

• chr14-74058344-C-T
• rs76665287
• NM_005589.4:c.*2298G>A

Variant summary

Our verdict is Benign. The variant received -14 ACMG points: 0P and 14B. BP4_Strong BP6_Moderate BS1 BS2

The NM_005589.4(ALDH6A1):​c.*2298G>A variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00746 in 140,106 control chromosomes in the GnomAD database, including 7 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★).

• Frequency:
  • Genomes: 𝑓 0.0075 (7 hom., cov: 31)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: ALDH6A1 NM_005589.4 3_prime_UTR
• Clinical Significance: Benign criteria provided, single submitter B:1
• Conservation: PhyloP100: 0.205
• Publications: 0 publications found

Genes affected

ALDH6A1 (HGNC:7179): (aldehyde dehydrogenase 6 family member A1) This gene encodes a member of the aldehyde dehydrogenase protein family. The encoded protein is a mitochondrial methylmalonate semialdehyde dehydrogenase that plays a role in the valine and pyrimidine catabolic pathways. This protein catalyzes the irreversible oxidative decarboxylation of malonate and methylmalonate semialdehydes to acetyl- and propionyl-CoA. Methylmalonate semialdehyde dehydrogenase deficiency is characterized by elevated beta-alanine, 3-hydroxypropionic acid, and both isomers of 3-amino and 3-hydroxyisobutyric acids in urine organic acids. Alternate splicing results in multiple transcript variants. [provided by RefSeq, Jun 2013]

BBOF1 (HGNC:19855): (basal body orientation factor 1) Predicted to be involved in motile cilium assembly. Predicted to be located in ciliary basal body. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Our verdict: Benign. The variant received -14 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.91).
• BP6: Variant 14-74058344-C-T is Benign according to our data. Variant chr14-74058344-C-T is described in ClinVar as Benign. ClinVar VariationId is 884861.Status of the report is criteria_provided_single_submitter, 1 stars.
• BS1: Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.00746 (1045/140106) while in subpopulation AFR AF = 0.0307 (1021/33218). AF 95% confidence interval is 0.0292. There are 7 homozygotes in GnomAd4. There are 502 alleles in the male GnomAd4 subpopulation. Median coverage is 31. This position passed quality control check.
• BS2: High Homozygotes in GnomAd4 at 7 AR gene

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_005589.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ALDH6A1	NM_005589.4	MANE Select	c.*2298G>A		3_prime_UTR	Exon 12 of 12	NP_005580.1	A0A024R6G4
	BBOF1	NM_025057.3	MANE Select	c.1578+1086C>T		intron	N/A	NP_079333.2	Q8ND07
	ALDH6A1	NM_001278593.2		c.*2298G>A		3_prime_UTR	Exon 12 of 12	NP_001265522.1	Q02252-2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ALDH6A1	ENST00000553458.6	TSL:1 MANE Select	c.*2298G>A		3_prime_UTR	Exon 12 of 12	ENSP00000450436.1	Q02252-1
	BBOF1	ENST00000394009.5	TSL:2 MANE Select	c.1578+1086C>T		intron	N/A	ENSP00000377577.3	Q8ND07
	BBOF1	ENST00000901146.1		c.1434+1086C>T		intron	N/A	ENSP00000571205.1

Frequencies

GnomAD3 genomes AF: 0.00745 AC: 1043 AN: 140046 Hom.: 7 Cov.: 31

Gnomad AFR AF: 0.0307

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000845

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000449

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000599

Gnomad OTH AF: 0.00308

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 58 Hom.: 0 Cov.: 0 AF XY: 0.00 AC XY: 0 AN XY: 32

African (AFR) AC: 0 AN: 0

American (AMR) AC: 0 AN: 0

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 2

East Asian (EAS) AF: 0.00 AC: 0 AN: 2

South Asian (SAS) AC: 0 AN: 0

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 2

Middle Eastern (MID) AC: 0 AN: 0

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 48

Other (OTH) AF: 0.00 AC: 0 AN: 4

GnomAD4 genome AF: 0.00746 AC: 1045 AN: 140106 Hom.: 7 Cov.: 31 AF XY: 0.00735 AC XY: 502 AN XY: 68314

African (AFR) AF: 0.0307 AC: 1021 AN: 33218

American (AMR) AF: 0.000844 AC: 12 AN: 14222

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3288

East Asian (EAS) AF: 0.00 AC: 0 AN: 5038

South Asian (SAS) AF: 0.000450 AC: 2 AN: 4446

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10014

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 274

European-Non Finnish (NFE) AF: 0.0000599 AC: 4 AN: 66742

Other (OTH) AF: 0.00306 AC: 6 AN: 1962

Alfa AF: 0.0152 Hom.: 40

Bravo AF: 0.00794

ClinVar

ClinVar submissions

Significance: Benign

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	-	1	Methylmalonate semialdehyde dehydrogenase deficiency (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.91
CADD	Benign	8.3
DANN	Benign	0.44
PhyloP100		0.20

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

Other links and lift over

dbSNP: rs76665287; hg19: chr14-74525047;