NM_013338.5:c.54A>G

Variant names:

• chr13-36999247-T-C
• rs376568505
• NM_013338.5:c.54A>G

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 2P and 5B. PM2 BP4_Strong BP7

The NM_013338.5(ALG5):​c.54A>G​(p.Ala18Ala) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000197 in 152,152 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. A18A) has been classified as Benign.

• Frequency:
  • Genomes: 𝑓 0.000020 (0 hom., cov: 32)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: ALG5 NM_013338.5 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.483
• Publications: 0 publications found

Genes affected

ALG5 (HGNC:20266): (ALG5 dolichyl-phosphate beta-glucosyltransferase) This gene encodes a member of the glycosyltransferase 2 family. The encoded protein participates in glucosylation of the oligomannose core in N-linked glycosylation of proteins. The addition of glucose residues to the oligomannose core is necessary to ensure substrate recognition, and therefore, effectual transfer of the oligomannose core to the nascent glycoproteins. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Nov 2008]

EXOSC8 (HGNC:17035): (exosome component 8) This gene encodes a 3'-5' exoribonuclease that specifically interacts with mRNAs containing AU-rich elements. The encoded protein is part of the exosome complex that is important for the degradation of numerous RNA species. A pseudogene of this gene is found on chromosome 6. [provided by RefSeq, Mar 2009]

EXOSC8 Gene-Disease associations (from GenCC):

• pontocerebellar hypoplasia, type 1C

  Inheritance: Unknown, AR Classification: MODERATE, LIMITED Submitted by: Labcorp Genetics (formerly Invitae), G2P, Ambry Genetics
• pontocerebellar hypoplasia type 1

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Likely_benign. The variant received -3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.84).
• BP7: Synonymous conserved (PhyloP=-0.483 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_013338.5. 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
	ALG5	NM_013338.5	MANE Select	c.54A>G	p.Ala18Ala	synonymous	Exon 1 of 10	NP_037470.1	Q9Y673-1
	ALG5	NM_001142364.1		c.54A>G	p.Ala18Ala	synonymous	Exon 1 of 9	NP_001135836.1	Q9Y673-2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ALG5	ENST00000239891.4	TSL:1 MANE Select	c.54A>G	p.Ala18Ala	synonymous	Exon 1 of 10	ENSP00000239891.3	Q9Y673-1
	ALG5	ENST00000857206.1		c.54A>G	p.Ala18Ala	synonymous	Exon 1 of 11	ENSP00000527265.1
	ALG5	ENST00000857208.1		c.54A>G	p.Ala18Ala	synonymous	Exon 1 of 10	ENSP00000527267.1

Frequencies

GnomAD3 genomes AF: 0.0000197 AC: 3 AN: 152152 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.0000724

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00

Gnomad OTH AF: 0.00

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 1428310 Hom.: 0 Cov.: 30 AF XY: 0.00 AC XY: 0 AN XY: 710376

African (AFR) AF: 0.00 AC: 0 AN: 30380

American (AMR) AF: 0.00 AC: 0 AN: 39926

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25248

East Asian (EAS) AF: 0.00 AC: 0 AN: 35030

South Asian (SAS) AF: 0.00 AC: 0 AN: 82756

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 52016

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5666

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1098272

Other (OTH) AF: 0.00 AC: 0 AN: 59016

GnomAD4 genome AF: 0.0000197 AC: 3 AN: 152152 Hom.: 0 Cov.: 32 AF XY: 0.0000404 AC XY: 3 AN XY: 74320

African (AFR) AF: 0.0000724 AC: 3 AN: 41434

American (AMR) AF: 0.00 AC: 0 AN: 15290

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3466

East Asian (EAS) AF: 0.00 AC: 0 AN: 5176

South Asian (SAS) AF: 0.00 AC: 0 AN: 4826

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10622

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 316

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 68018

Other (OTH) AF: 0.00 AC: 0 AN: 2092

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.0000227

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.84
CADD	Benign	6.8
DANN	Benign	0.50
PhyloP100		-0.48
PromoterAI		0.14	Neutral
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		2.7

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: rs376568505; hg19: chr13-37573384;