NM_024740.2:c.694G>C

Variant names:

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2BS1_Supporting

The NM_024740.2(ALG9):c.694G>C(p.Ala232Pro) variant causes a missense change. The variant allele was found at a frequency of 0.000445 in 1,614,126 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.00034 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00046 ( 0 hom. )

Consequence

ALG9
NM_024740.2 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:6B:2

Conservation

PhyloP100: 3.61

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 links:

ENSG00000258529 (HGNC:):

ENSG00000258529 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BS1

Variant frequency is greater than expected in population nfe. gnomad4 allele frequency = 0.000341 (52/152282) while in subpopulation NFE AF= 0.00072 (49/68018). AF 95% confidence interval is 0.00056. There are 0 homozygotes in gnomad4. There are 26 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ALG9	NM_024740.2 link	c.694G>C	p.Ala232Pro	missense_variant	Exon 6 of 15	ENST00000616540.5	NP_079016.2	Q9H6U8-3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ALG9	ENST00000616540.5 link	c.694G>C	p.Ala232Pro	missense_variant	Exon 6 of 15	1	NM_024740.2	ENSP00000482437.1		Q9H6U8-3
ENSG00000258529	ENST00000622211.4 link	c.1393G>C	p.Ala465Pro	missense_variant	Exon 10 of 19	2		ENSP00000482396.1		A0A087WZ62

Frequencies

GnomAD3 genomes

AF:

0.000342

AC:

AN:

152164

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000414

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000720

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000289

AC:

AN:

249556

Hom.:

AF XY:

0.000281

AC XY:

AN XY:

135398

show subpopulations

Gnomad AFR exome

AF:

0.000129

Gnomad AMR exome

AF:

0.0000290

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000327

Gnomad FIN exome

AF:

0.000325

Gnomad NFE exome

AF:

0.000539

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000456

AC:

666

AN:

1461844

Hom.:

Cov.:

AF XY:

0.000440

AC XY:

320

AN XY:

727230

show subpopulations

Gnomad4 AFR exome

AF:

0.0000896

Gnomad4 AMR exome

AF:

0.0000895

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000232

Gnomad4 FIN exome

AF:

0.000431

Gnomad4 NFE exome

AF:

0.000554

Gnomad4 OTH exome

AF:

0.000199

GnomAD4 genome

AF:

0.000341

AC:

AN:

152282

Hom.:

Cov.:

AF XY:

0.000349

AC XY:

AN XY:

74468

show subpopulations

Gnomad4 AFR

AF:

0.0000241

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000414

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000720

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000435

Hom.:

Bravo

AF:

0.000366

TwinsUK

AF:

0.00108

AC:

ALSPAC

AF:

0.000259

AC:

ESP6500AA

AF:

0.000257

AC:

ESP6500EA

AF:

0.000481

AC:

ExAC

AF:

0.000273

AC:

EpiCase

AF:

0.000491

EpiControl

AF:

0.000415

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:6Benign:2

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:3

Mar 06, 2024

GeneDx

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Reported in the heterozygous state in a patient with kidney and liver cysts in published literature (PMID: 31395617); In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; This variant is associated with the following publications: (PMID: 34426522, 31395617, 27391121) -

Nov 05, 2018

Athena Diagnostics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Jul 31, 2013

Eurofins Ntd Llc (ga)

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

ALG9 congenital disorder of glycosylation

Uncertain:2

Jan 11, 2019

Baylor Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant was determined to be of uncertain significance according to ACMG Guidelines, 2015 [PMID:25741868]. -

Mar 20, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces alanine, which is neutral and non-polar, with proline, which is neutral and non-polar, at codon 232 of the ALG9 protein (p.Ala232Pro). This variant is present in population databases (rs36111204, gnomAD 0.05%). This missense change has been observed in individual(s) with clinical features of ALG9-related conditions (PMID: 27391121, 31395617). ClinVar contains an entry for this variant (Variation ID: 96135). Algorithms developed to predict the effect of variants on protein structure and function are not available or were not evaluated for this variant. Experimental studies are conflicting or provide insufficient evidence to determine the effect of this variant on ALG9 function (PMID: 31395617). In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Gillessen-Kaesbach-Nishimura syndrome;C2931006:ALG9 congenital disorder of glycosylation

Uncertain:1

Oct 31, 2018

Fulgent Genetics, Fulgent Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

See cases

Benign:1

Dec 25, 2019

Laboratorio de Genetica e Diagnostico Molecular, Hospital Israelita Albert Einstein

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

ACMG classification criteria: PM2, BP1, BP4 -

Autosomal dominant polycystic liver disease

Benign:1

May 21, 2019

Stefan Somlo Laboratory, Yale School of Medicine

Significance: Benign

Review Status: no assertion criteria provided

Collection Method: research

Variant able to rescue ALG9 knockout effect on Polycystin-1 maturation in vitro -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.81

BayesDel_addAF

Uncertain

0.032

BayesDel_noAF

Pathogenic

0.16

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.46

T;.;.;.;.

Eigen

Pathogenic

0.81

Eigen_PC

Pathogenic

0.78

FATHMM_MKL

Uncertain

0.89

LIST_S2

Uncertain

0.97

D;D;D;D;D

M_CAP

Benign

0.039

MetaRNN

Uncertain

0.60

D;D;D;D;D

MetaSVM

Uncertain

0.022

MutationAssessor

Pathogenic

3.0

M;.;.;M;.

PrimateAI

Uncertain

0.58

PROVEAN

Uncertain

-2.7

.;D;D;.;.

REVEL

Uncertain

0.40

Sift

Benign

0.047

.;D;D;.;.

Sift4G

Benign

0.077

T;T;T;T;T

Polyphen

0.98

D;.;.;D;.

Vest4

0.90

MVP

0.93

MPC

0.97

ClinPred

0.64

GERP RS

6.0

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.61

gMVP

0.92

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

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over