NM_001041.4:c.4099A>G

Variant names:

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2PP5

The NM_001041.4(SI):c.4099A>G(p.Arg1367Gly) variant causes a missense change. The variant allele was found at a frequency of 0.000337 in 1,613,426 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 0.00032 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00034 ( 0 hom. )

Consequence

SI
NM_001041.4 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications P:2U:2

Conservation

PhyloP100: 4.42

Variant links:

Genes affected

SI (HGNC:10856): (sucrase-isomaltase) This gene encodes a sucrase-isomaltase enzyme that is expressed in the intestinal brush border. The encoded protein is synthesized as a precursor protein that is cleaved by pancreatic proteases into two enzymatic subunits sucrase and isomaltase. These two subunits heterodimerize to form the sucrose-isomaltase complex. This complex is essential for the digestion of dietary carbohydrates including starch, sucrose and isomaltose. Mutations in this gene are the cause of congenital sucrase-isomaltase deficiency.[provided by RefSeq, Apr 2010]

SI links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 3 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP5

Variant 3-165009359-T-C is Pathogenic according to our data. Variant chr3-165009359-T-C is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 344017.We mark this variant Likely_pathogenic, oryginal submissions are: {Uncertain_significance=2, Likely_pathogenic=2}.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SI	NM_001041.4 link	c.4099A>G	p.Arg1367Gly	missense_variant	Exon 35 of 48	ENST00000264382.8	NP_001032.2	P14410
SI	XM_047448735.1 link	c.4099A>G	p.Arg1367Gly	missense_variant	Exon 36 of 49		XP_047304691.1
SI	XM_047448736.1 link	c.4099A>G	p.Arg1367Gly	missense_variant	Exon 36 of 49		XP_047304692.1
SI	XM_011513078.3 link	c.4000A>G	p.Arg1334Gly	missense_variant	Exon 34 of 47		XP_011511380.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SI	ENST00000264382.8 link	c.4099A>G	p.Arg1367Gly	missense_variant	Exon 35 of 48	1	NM_001041.4	ENSP00000264382.3		P14410

Frequencies

GnomAD3 genomes

AF:

0.000322

AC:

AN:

152150

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000483

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:

0.000377

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000632

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000263

AC:

AN:

251028

Hom.:

AF XY:

0.000287

AC XY:

AN XY:

135682

show subpopulations

Gnomad AFR exome

AF:

0.0000616

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000653

Gnomad FIN exome

AF:

0.000462

Gnomad NFE exome

AF:

0.000458

Gnomad OTH exome

AF:

0.000164

GnomAD4 exome

AF:

0.000338

AC:

494

AN:

1461276

Hom.:

Cov.:

AF XY:

0.000341

AC XY:

248

AN XY:

726936

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.000115

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000464

Gnomad4 FIN exome

AF:

0.000393

Gnomad4 NFE exome

AF:

0.000402

Gnomad4 OTH exome

AF:

0.000298

GnomAD4 genome

AF:

0.000322

AC:

AN:

152150

Hom.:

Cov.:

AF XY:

0.000336

AC XY:

AN XY:

74316

show subpopulations

Gnomad4 AFR

AF:

0.0000483

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.000377

Gnomad4 NFE

AF:

0.000632

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000461

Hom.:

Bravo

AF:

0.000219

TwinsUK

AF:

0.000809

AC:

ALSPAC

AF:

0.000778

AC:

ESP6500AA

AF:

0.000227

AC:

ESP6500EA

AF:

0.000465

AC:

ExAC

AF:

0.000280

AC:

EpiCase

AF:

0.000654

EpiControl

AF:

0.000415

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Pathogenic:2Uncertain:2

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Pathogenic:1Uncertain:1

Dec 24, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces arginine, which is basic and polar, with glycine, which is neutral and non-polar, at codon 1367 of the SI protein (p.Arg1367Gly). This variant is present in population databases (rs143388292, gnomAD 0.05%). This missense change has been observed in individual(s) with sucrase-isomaltase deficiency and irritable bowel syndrome (PMID: 16329100, 29408290, 32732636). ClinVar contains an entry for this variant (Variation ID: 344017). Invitae Evidence Modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) has been performed for this missense variant. However, the output from this modeling did not meet the statistical confidence thresholds required to predict the impact of this variant on SI protein function. In summary, the currently available evidence indicates that the variant is pathogenic, but additional data are needed to prove that conclusively. Therefore, this variant has been classified as Likely Pathogenic. -

Jun 22, 2020

GeneDx

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Identified in at least one patient with irritable bowel syndrome with diarrhea in published literature (Garcia-Etxebarria et al., 2018); 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: 16329100, 29408290) -

Sucrase-isomaltase deficiency

Pathogenic:1Uncertain:1

Apr 27, 2017

Illumina Laboratory Services, Illumina

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The SI c.4099A>G (p.Arg1367Gly) missense variant has been reported in one study in which it was found in one individual with congenital sucrase-isomaltase deficiency in a compound heterozygous state along with a frameshift variant (Sander et al. 2006). Control data are unavailable for this variant, but it is reported at a frequency of 0.00047 in the European American population of the Exome Sequencing Project. The evidence for this variant is limited. The p.Arg1367Gly variant is therefore classified as a variant of unknown significance but suspicious for pathogenicity for congenital sucrose-isomaltase deficiency. This variant was observed by ICSL as part of a predisposition screen in an ostensibly healthy population. -

Jun 30, 2021

Fulgent Genetics, Fulgent Genetics

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.51

BayesDel_addAF

Benign

-0.17

BayesDel_noAF

Uncertain

-0.070

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.50

Eigen

Uncertain

0.23

Eigen_PC

Benign

0.11

FATHMM_MKL

Uncertain

0.89

LIST_S2

Uncertain

0.95

M_CAP

Uncertain

0.17

MetaRNN

Uncertain

0.71

MetaSVM

Uncertain

0.60

MutationAssessor

Uncertain

2.1

PrimateAI

Benign

0.38

PROVEAN

Pathogenic

-6.1

REVEL

Uncertain

0.55

Sift

Uncertain

0.022

Sift4G

Uncertain

0.031

Polyphen

0.98

Vest4

0.51

MVP

0.95

MPC

0.23

ClinPred

0.74

GERP RS

0.55

Varity_R

0.46

gMVP

0.78

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