rs143517122

Positions:

Variant summary

Our verdict is Likely benign. Variant got -3 ACMG points: 2P and 5B. PM2BP4_StrongBP6

The NM_000209.4(PDX1):c.418G>A(p.Ala140Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000247 in 1,602,976 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.00022 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00025 ( 0 hom. )

Consequence

PDX1
NM_000209.4 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1B:5

Conservation

PhyloP100: -0.277

Variant links:

Genes affected

PDX1 (HGNC:6107): (pancreatic and duodenal homeobox 1) The protein encoded by this gene is a transcriptional activator of several genes, including insulin, somatostatin, glucokinase, islet amyloid polypeptide, and glucose transporter type 2. The encoded nuclear protein is involved in the early development of the pancreas and plays a major role in glucose-dependent regulation of insulin gene expression. Defects in this gene are a cause of pancreatic agenesis, which can lead to early-onset insulin-dependent diabetes mellitus (IDDM), as well as maturity onset diabetes of the young type 4 (MODY4). [provided by RefSeq, Aug 2017]

PDX1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -3 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.018681198).

BP6

Variant 13-27924267-G-A is Benign according to our data. Variant chr13-27924267-G-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 586036.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=2, Benign=1, Uncertain_significance=1}. Variant chr13-27924267-G-A is described in Lovd as [Likely_benign].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
PDX1	NM_000209.4 linkuse as main transcript	c.418G>A	p.Ala140Thr	missense_variant	2/2	ENST00000381033.5	NP_000200.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
PDX1	ENST00000381033.5 linkuse as main transcript	c.418G>A	p.Ala140Thr	missense_variant	2/2	1	NM_000209.4	ENSP00000370421	P1

Frequencies

GnomAD3 genomes

AF:

0.000217

AC:

AN:

152206

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000965

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000654

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:

0.000397

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000214

AC:

AN:

238274

Hom.:

AF XY:

0.000231

AC XY:

AN XY:

129744

show subpopulations

Gnomad AFR exome

AF:

0.0000677

Gnomad AMR exome

AF:

0.000299

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.000200

Gnomad FIN exome

AF:

0.0000496

Gnomad NFE exome

AF:

0.000310

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000250

AC:

363

AN:

1450652

Hom.:

Cov.:

AF XY:

0.000255

AC XY:

184

AN XY:

720534

show subpopulations

Gnomad4 AFR exome

AF:

0.0000301

Gnomad4 AMR exome

AF:

0.000250

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000253

Gnomad4 SAS exome

AF:

0.000257

Gnomad4 FIN exome

AF:

0.0000766

Gnomad4 NFE exome

AF:

0.000281

Gnomad4 OTH exome

AF:

0.000201

GnomAD4 genome

AF:

0.000217

AC:

AN:

152324

Hom.:

Cov.:

AF XY:

0.000201

AC XY:

AN XY:

74476

show subpopulations

Gnomad4 AFR

AF:

0.0000962

Gnomad4 AMR

AF:

0.0000653

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.000193

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000397

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000417

Hom.:

Bravo

AF:

0.000136

TwinsUK

AF:

0.00

AC:

ALSPAC

AF:

0.000259

AC:

ESP6500AA

AF:

0.000228

AC:

ESP6500EA

AF:

0.000582

AC:

ExAC

AF:

0.000255

AC:

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:1Benign:5

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:1Benign:4

Uncertain significance, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Dec 28, 2023	This sequence change replaces alanine, which is neutral and non-polar, with threonine, which is neutral and polar, at codon 140 of the PDX1 protein (p.Ala140Thr). This variant is present in population databases (rs143517122, gnomAD 0.04%). This missense change has been observed in individual(s) with clinical features of PDX1-related conditions (PMID: 10720084, 21569088). ClinVar contains an entry for this variant (Variation ID: 586036). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt PDX1 protein function with a negative predictive value of 80%. Experimental studies have shown that this missense change affects PDX1 function (PMID: 15001545). 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. -
Likely benign, no assertion criteria provided	clinical testing	Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center	-	- -
Likely benign, criteria provided, single submitter	clinical testing	Athena Diagnostics	Jul 15, 2020	- -
Likely benign, criteria provided, single submitter	clinical testing	GeneDx	Apr 28, 2021	This variant is associated with the following publications: (PMID: 10720084, 21569088, 15001545) -
Likely benign, no assertion criteria provided	clinical testing	Laboratory of Diagnostic Genome Analysis, Leiden University Medical Center (LUMC)	-	- -

Pancreatic hypoplasia

Benign:1

Benign, criteria provided, single submitter

research

Clinical Genomics, Uppaluri K&H Personalized Medicine Clinic

Potent homozygous mutations in the PDX1 gene can lead to pancreatic agenesis/pancreatic hypoplasia and neonatal diabetes mellitus. However no sufficient evidence is found to ascertain the role of this particular variant rs143517122, yet. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.070

BayesDel_addAF

Benign

-0.39

BayesDel_noAF

Benign

-0.43

CADD

Benign

6.5

DANN

Benign

0.94

DEOGEN2

Benign

0.33

Eigen

Benign

-1.2

Eigen_PC

Benign

-1.2

FATHMM_MKL

Benign

0.23

LIST_S2

Benign

0.56

M_CAP

Benign

0.071

MetaRNN

Benign

0.019

MetaSVM

Benign

-0.40

MutationAssessor

Benign

1.1

MutationTaster

Benign

1.0

PrimateAI

Benign

0.37

PROVEAN

Benign

-0.54

REVEL

Benign

0.18

Sift

Benign

0.58

Sift4G

Benign

0.63

Polyphen

0.0010

Vest4

0.011

MVP

0.44

MPC

0.93

ClinPred

0.0091

GERP RS

-1.2

Varity_R

0.034

gMVP

0.65

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