NM_001040108.2:c.149T>A

Variant names:

Variant summary

Our verdict is Benign. Variant got -13 ACMG points: 0P and 13B. BP4_StrongBP6BS1BS2

The NM_001040108.2(MLH3):c.149T>A(p.Phe50Tyr) variant causes a missense change. The variant allele was found at a frequency of 0.000482 in 1,614,056 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 14/21 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 0.00048 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00048 ( 1 hom. )

Consequence

MLH3
NM_001040108.2 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:5B:3

Conservation

PhyloP100: 3.79

Variant links:

Genes affected

MLH3 (HGNC:7128): (mutL homolog 3) This gene is a member of the MutL-homolog (MLH) family of DNA mismatch repair (MMR) genes. MLH genes are implicated in maintaining genomic integrity during DNA replication and after meiotic recombination. The protein encoded by this gene functions as a heterodimer with other family members. Somatic mutations in this gene frequently occur in tumors exhibiting microsatellite instability, and germline mutations have been linked to hereditary nonpolyposis colorectal cancer type 7 (HNPCC7). Several alternatively spliced transcript variants have been identified, but the full-length nature of only two transcript variants has been determined. [provided by RefSeq, Jul 2008]

MLH3 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -13 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.010549068).

BP6

Variant 14-75049507-A-T is Benign according to our data. Variant chr14-75049507-A-T is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 314393.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=2, Benign=1, Uncertain_significance=4}.

BS1

Variant frequency is greater than expected in population nfe. gnomad4 allele frequency = 0.00048 (73/152172) while in subpopulation NFE AF= 0.000529 (36/68020). AF 95% confidence interval is 0.000392. There are 0 homozygotes in gnomad4. There are 24 alleles in male gnomad4 subpopulation. Median coverage is 33. This position pass quality control queck.

BS2

High AC in GnomAd4 at 73 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MLH3	NM_001040108.2 link	c.149T>A	p.Phe50Tyr	missense_variant	Exon 2 of 13	ENST00000355774.7	NP_001035197.1	Q9UHC1-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MLH3	ENST00000355774.7 link	c.149T>A	p.Phe50Tyr	missense_variant	Exon 2 of 13	5	NM_001040108.2	ENSP00000348020.2		Q9UHC1-1

Frequencies

GnomAD3 genomes

AF:

0.000480

AC:

AN:

152172

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000193

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000262

Gnomad ASJ

AF:

0.00691

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000529

Gnomad OTH

AF:

0.000478

GnomAD3 exomes

AF:

0.000541

AC:

136

AN:

251432

Hom.:

AF XY:

0.000552

AC XY:

AN XY:

135898

show subpopulations

Gnomad AFR exome

AF:

0.000123

Gnomad AMR exome

AF:

0.000145

Gnomad ASJ exome

AF:

0.00635

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.0000924

Gnomad NFE exome

AF:

0.000519

Gnomad OTH exome

AF:

0.000651

GnomAD4 exome

AF:

0.000482

AC:

705

AN:

1461884

Hom.:

Cov.:

AF XY:

0.000470

AC XY:

342

AN XY:

727240

show subpopulations

Gnomad4 AFR exome

AF:

0.000119

Gnomad4 AMR exome

AF:

0.000134

Gnomad4 ASJ exome

AF:

0.00574

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.000112

Gnomad4 NFE exome

AF:

0.000459

Gnomad4 OTH exome

AF:

0.000480

GnomAD4 genome

AF:

0.000480

AC:

AN:

152172

Hom.:

Cov.:

AF XY:

0.000323

AC XY:

AN XY:

74338

show subpopulations

Gnomad4 AFR

AF:

0.000193

Gnomad4 AMR

AF:

0.000262

Gnomad4 ASJ

AF:

0.00691

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000529

Gnomad4 OTH

AF:

0.000478

Alfa

AF:

0.00106

Hom.:

Bravo

AF:

0.000518

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000698

AC:

ExAC

AF:

0.000371

AC:

EpiCase

AF:

0.000872

EpiControl

AF:

0.000593

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:5Benign:3

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not specified

Uncertain:1Benign:1

Mar 04, 2025

Center for Genomic Medicine, Rigshospitalet, Copenhagen University Hospital

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Jun 25, 2020

Ambry Genetics

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

Colorectal cancer, hereditary nonpolyposis, type 7

Uncertain:1Benign:1

Jan 13, 2018

Illumina Laboratory Services, Illumina

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. -

Jan 23, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Colorectal cancer;C0476089:Endometrial carcinoma;C1858380:Colorectal cancer, hereditary nonpolyposis, type 7

Uncertain:1

Nov 29, 2023

Department of Pathology and Laboratory Medicine, Sinai Health System

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

not provided

Uncertain:1

Dec 12, 2023

Mayo Clinic Laboratories, Mayo Clinic

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

BP4 -

Hereditary cancer

Uncertain:1

May 20, 2014

Centre for Mendelian Genomics, University Medical Centre Ljubljana

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Endometrial carcinoma

Benign:1

Jan 01, 2016

Centre for Mendelian Genomics, University Medical Centre Ljubljana

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant was classified as: Likely benign. The following ACMG criteria were applied in classifying this variant: BP4,BP6,BS1. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.15

BayesDel_addAF

Benign

-0.32

BayesDel_noAF

Benign

-0.33

CADD

Benign

DANN

Benign

0.97

DEOGEN2

Benign

0.33

T;.;.;T;.;.

Eigen

Benign

-0.12

Eigen_PC

Benign

0.019

FATHMM_MKL

Uncertain

0.95

LIST_S2

Benign

0.56

T;T;T;.;T;T

M_CAP

Benign

0.016

MetaRNN

Benign

0.011

T;T;T;T;T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

1.1

L;L;.;L;.;.

PrimateAI

Uncertain

0.55

PROVEAN

Benign

-1.7

N;.;N;N;N;N

REVEL

Benign

0.071

Sift

Benign

0.10

T;.;T;T;T;T

Sift4G

Benign

0.12

T;T;T;T;.;.

Polyphen

0.044

B;B;.;B;.;.

Vest4

0.33

MVP

0.68

MPC

0.15

ClinPred

0.017

GERP RS

4.0

Varity_R

0.33

gMVP

0.47

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