Genetic Variant ALG9:p.Ala232Thr (chr11-111857609-C-T) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_024740.2(ALG9):c.694G>A(p.Ala232Thr) variant causes a missense change. The variant allele was found at a frequency of 0.00000137 in 1,461,844 control chromosomes in the GnomAD database, with no homozygous occurrence. 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. A232P) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000014 ( 0 hom. )

Consequence

ALG9
NM_024740.2 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 3.61

Publications

4 publications found

Variant links:

Genes affected

ALG9 (HGNC:15672): (ALG9 alpha-1,2-mannosyltransferase) This gene encodes an alpha-1,2-mannosyltransferase enzyme that functions in lipid-linked oligosaccharide assembly. Mutations in this gene result in congenital disorder of glycosylation type Il. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Dec 2008]

ALG9 Gene-Disease associations (from GenCC):

ALG9-associated autosomal dominant polycystic kidney disease
Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
ALG9-congenital disorder of glycosylation
Inheritance: AR Classification: STRONG, MODERATE, SUPPORTIVE, LIMITED Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae), G2P, PanelApp Australia, Orphanet
autosomal dominant polycystic kidney disease
Inheritance: AD Classification: MODERATE, SUPPORTIVE Submitted by: Genomics England PanelApp, Orphanet
Gillessen-Kaesbach-Nishimura syndrome
Inheritance: AR Classification: MODERATE Submitted by: Ambry Genetics

ALG9 links:

ENSG00000258529 (HGNC:):

ENSG00000258529 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ALG9	NM_024740.2 link	c.694G>A	p.Ala232Thr	missense_variant	Exon 6 of 15	ENST00000616540.5	NP_079016.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ALG9	ENST00000616540.5 link	c.694G>A	p.Ala232Thr	missense_variant	Exon 6 of 15	1	NM_024740.2	ENSP00000482437.1
ENSG00000258529	ENST00000622211.4 link	c.1393G>A	p.Ala465Thr	missense_variant	Exon 10 of 19	2		ENSP00000482396.1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.00000137

AC:

AN:

1461844

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

727230

show subpopulations

African (AFR)

AF:

0.0000299

AC:

AN:

33474

American (AMR)

AF:

0.0000224

AC:

AN:

44716

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26134

East Asian (EAS)

AF:

0.00

AC:

AN:

39694

South Asian (SAS)

AF:

0.00

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53416

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1111996

Other (OTH)

AF:

0.00

AC:

AN:

60388

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.500

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.00000756

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.21

BayesDel_addAF

Uncertain

0.026

BayesDel_noAF

Benign

-0.20

CADD

Pathogenic

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.32

T;.;.;.;.

Eigen

Uncertain

0.63

Eigen_PC

Uncertain

0.66

FATHMM_MKL

Uncertain

0.91

LIST_S2

Benign

0.81

T;T;T;T;T

M_CAP

Benign

0.027

MetaRNN

Uncertain

0.59

D;D;D;D;D

MetaSVM

Uncertain

-0.17

MutationAssessor

Pathogenic

3.0

M;.;.;M;.

PhyloP100

3.6

PrimateAI

Uncertain

0.51

PROVEAN

Benign

-1.4

.;N;N;.;.

REVEL

Benign

0.27

Sift

Benign

0.16

.;T;T;.;.

Sift4G

Benign

0.25

T;T;T;T;T

Polyphen

0.76

P;.;.;P;.

Vest4

0.67

MutPred

0.46

Loss of helix (P = 0.1299);.;.;Loss of helix (P = 0.1299);.;

MVP

0.87

MPC

0.54

ClinPred

0.63

GERP RS

6.0

Varity_R

0.24

gMVP

0.58

Mutation Taster

=65/35

polymorphism

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Computational scores

Splicing

Publications

Other links and lift over