chr2-240868867-T-C

Variant summary

Our verdict is Pathogenic. Variant got 11 ACMG points: 11P and 0B. PVS1_SupportingPM2PP5_Very_Strong

The NM_000030.3(AGXT):ā€‹c.2T>Cā€‹(p.Met1?) variant causes a start lost change. The variant allele was found at a frequency of 0.00000683 in 1,610,270 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (ā˜…ā˜…).

Frequency

Genomes: š‘“ 0.0000066 ( 0 hom., cov: 33)
Exomes š‘“: 0.0000069 ( 0 hom. )

Consequence

AGXT
NM_000030.3 start_lost

Scores

7
6
3

Clinical Significance

Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:8

Conservation

PhyloP100: 4.12
Variant links:
Genes affected
AGXT (HGNC:341): (alanine--glyoxylate aminotransferase) This gene is expressed only in the liver and the encoded protein is localized mostly in the peroxisomes, where it is involved in glyoxylate detoxification. Mutations in this gene, some of which alter subcellular targetting, have been associated with type I primary hyperoxaluria. [provided by RefSeq, Jul 2008]

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Pathogenic. Variant got 11 ACMG points.

PVS1
Start lost variant, no pathogenic variants between lost start and next in-frame start position. Next in-frame start position is after 111 CDS bases. Genomic position: 240868976. Lost 0.094 part of the original CDS.
PM2
Very rare variant in population databases, with high coverage;
PP5
Variant 2-240868867-T-C is Pathogenic according to our data. Variant chr2-240868867-T-C is described in ClinVar as [Likely_pathogenic]. Clinvar id is 204065.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene Transcript HGVSc HGVSp Effect Exon rank MANE Protein UniProt
AGXTNM_000030.3 linkc.2T>C p.Met1? start_lost Exon 1 of 11 ENST00000307503.4 NP_000021.1 P21549

Ensembl

Gene Transcript HGVSc HGVSp Effect Exon rank TSL MANE Protein Appris UniProt
AGXTENST00000307503.4 linkc.2T>C p.Met1? start_lost Exon 1 of 11 1 NM_000030.3 ENSP00000302620.3 P21549
AGXTENST00000472436.1 linkn.22T>C non_coding_transcript_exon_variant Exon 1 of 5 2

Frequencies

GnomAD3 genomes
AF:
0.00000657
AC:
1
AN:
152206
Hom.:
0
Cov.:
33
show subpopulations
Gnomad AFR
AF:
0.00
Gnomad AMI
AF:
0.00
Gnomad AMR
AF:
0.00
Gnomad ASJ
AF:
0.00
Gnomad EAS
AF:
0.000193
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
GnomAD3 exomes
AF:
0.0000457
AC:
11
AN:
240536
Hom.:
0
AF XY:
0.0000534
AC XY:
7
AN XY:
131184
show subpopulations
Gnomad AFR exome
AF:
0.0000660
Gnomad AMR exome
AF:
0.00
Gnomad ASJ exome
AF:
0.00
Gnomad EAS exome
AF:
0.000499
Gnomad SAS exome
AF:
0.00
Gnomad FIN exome
AF:
0.00
Gnomad NFE exome
AF:
0.00000935
Gnomad OTH exome
AF:
0.00
GnomAD4 exome
AF:
0.00000686
AC:
10
AN:
1458064
Hom.:
0
Cov.:
31
AF XY:
0.00000690
AC XY:
5
AN XY:
725094
show subpopulations
Gnomad4 AFR exome
AF:
0.00
Gnomad4 AMR exome
AF:
0.00
Gnomad4 ASJ exome
AF:
0.00
Gnomad4 EAS exome
AF:
0.000202
Gnomad4 SAS exome
AF:
0.00
Gnomad4 FIN exome
AF:
0.00
Gnomad4 NFE exome
AF:
9.00e-7
Gnomad4 OTH exome
AF:
0.0000166
GnomAD4 genome
AF:
0.00000657
AC:
1
AN:
152206
Hom.:
0
Cov.:
33
AF XY:
0.0000134
AC XY:
1
AN XY:
74356
show subpopulations
Gnomad4 AFR
AF:
0.00
Gnomad4 AMR
AF:
0.00
Gnomad4 ASJ
AF:
0.00
Gnomad4 EAS
AF:
0.000193
Gnomad4 SAS
AF:
0.00
Gnomad4 FIN
AF:
0.00
Gnomad4 NFE
AF:
0.00
Gnomad4 OTH
AF:
0.00
Bravo
AF:
0.0000151
ESP6500AA
AF:
0.000227
AC:
1
ESP6500EA
AF:
0.00
AC:
0
ExAC
AF:
0.0000248
AC:
3

ClinVar

Significance: Pathogenic/Likely pathogenic
Submissions summary: Pathogenic:8
Revision: criteria provided, multiple submitters, no conflicts
LINK: link

Submissions by phenotype

Primary hyperoxaluria, type I Pathogenic:6
Aug 26, 2024
Chinese Inherited Urolithiasis Consortium, The Affiliated Yantai Yuhuangding Hospital of Qingdao University
Significance: Pathogenic
Review Status: no assertion criteria provided
Collection Method: clinical testing

Variant_type:missense/MutationTaster:Disease_causing_automatic/CADD:Damaging/phyloP:Conserved/phastCons:Conserved/gnomAD_exome_EastAsian:0.0005/ExAC_EastAsian:0.0003/dbSNP:rs138584408 -

May 18, 2017
Counsyl
Significance: Pathogenic
Review Status: criteria provided, single submitter
Collection Method: clinical testing

- -

Nov 27, 2014
Clinical Biochemistry Laboratory, Health Services Laboratory
Significance: Pathogenic
Review Status: no assertion criteria provided
Collection Method: research

- -

May 31, 2024
Fulgent Genetics, Fulgent Genetics
Significance: Pathogenic
Review Status: criteria provided, single submitter
Collection Method: clinical testing

- -

-
Baylor Genetics
Significance: Likely pathogenic
Review Status: criteria provided, single submitter
Collection Method: clinical testing

- -

Sep 12, 2020
Natera, Inc.
Significance: Pathogenic
Review Status: no assertion criteria provided
Collection Method: clinical testing

- -

Primary hyperoxaluria Pathogenic:1
Jul 31, 2024
Women's Health and Genetics/Laboratory Corporation of America, LabCorp
Significance: Pathogenic
Review Status: criteria provided, single submitter
Collection Method: clinical testing

Variant summary: AGXT c.2T>C (p.Met1Thr) alters the initiation codon and is predicted to result either in absence of the protein or truncation of the encoded protein due to translation initiation at a downstream codon. Next inframe start codon is located at p.M38. Variants upstream of this position have been classified Pathogenic in ClinVar (CV IDs: 188957,204069, 204072). Four of four in-silico tools predict a damaging effect of the variant on protein function. The variant allele was found at a frequency of 4.6e-05 in 240536 control chromosomes. This frequency is not significantly higher than estimated for a pathogenic variant in AGXT causing Primary Hyperoxaluria Type 1 (4.6e-05 vs 0.0024), allowing no conclusion about variant significance. c.2T>C has been reported in the literature in individuals affected with Primary Hyperoxaluria (examples:Li_2014, Yuen_2004, Lin_2021, Xin_2023). These data indicate that the variant is likely to be associated with disease. The following publications have been ascertained in the context of this evaluation (PMID: 37139236, 24934730, 33721035,15365967). ClinVar contains an entry for this variant (Variation ID: 204065). Based on the evidence outlined above, the variant was classified as pathogenic. -

not provided Pathogenic:1
Mar 10, 2024
Labcorp Genetics (formerly Invitae), Labcorp
Significance: Pathogenic
Review Status: criteria provided, single submitter
Collection Method: clinical testing

This sequence change affects the initiator methionine of the AGXT mRNA. The next in-frame methionine is located at codon 38. This variant is present in population databases (rs138584408, gnomAD 0.05%). Disruption of the initiator codon has been observed in individuals with primary hyperoxaluria type 1 (PMID: 15365967, 24934730, 29456205). ClinVar contains an entry for this variant (Variation ID: 204065). 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 have shown that disruption of the initiator codon affects AGXT function (PMID: 17495019). For these reasons, this variant has been classified as Pathogenic. -

Computational scores

Source: dbNSFP v4.3

Name
Calibrated prediction
Score
Prediction
BayesDel_addAF
Pathogenic
0.38
D
BayesDel_noAF
Pathogenic
0.28
CADD
Benign
22
DANN
Uncertain
0.99
DEOGEN2
Benign
0.29
T
Eigen
Uncertain
0.31
Eigen_PC
Uncertain
0.25
FATHMM_MKL
Pathogenic
0.97
D
LIST_S2
Uncertain
0.90
D
M_CAP
Pathogenic
0.96
D
MetaRNN
Pathogenic
0.93
D
MetaSVM
Pathogenic
0.79
D
PROVEAN
Benign
-2.2
N
REVEL
Pathogenic
0.83
Sift
Uncertain
0.0020
D
Sift4G
Uncertain
0.0020
D
Polyphen
0.96
D
Vest4
0.94
MVP
0.97
ClinPred
0.53
D
GERP RS
4.3
Varity_R
0.64
gMVP
0.86

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.

Other links and lift over

dbSNP: rs138584408; hg19: chr2-241808284; API