14-75047489-C-T

Variant names:

Variant summary

Our verdict is Benign. The variant received -9 ACMG points: 0P and 9B. BP4_StrongBP6BS1

The NM_001040108.2(MLH3):c.2167G>A(p.Val723Ile) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000282 in 1,614,022 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 16/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. V723F) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.0015 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00015 ( 1 hom. )

Consequence

MLH3
NM_001040108.2 missense

Scores

Clinical Significance

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

Conservation

PhyloP100: -0.616

Publications

2 publications found

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 Gene-Disease associations (from GenCC):

colorectal cancer, hereditary nonpolyposis, type 7
Inheritance: AD, AR Classification: MODERATE, LIMITED Submitted by: Ambry Genetics, ClinGen, Laboratory for Molecular Medicine
intestinal polyposis syndrome
Inheritance: AR Classification: LIMITED Submitted by: ClinGen

MLH3 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -9 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.0053261817).

BP6

Variant 14-75047489-C-T is Benign according to our data. Variant chr14-75047489-C-T is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 314385.

BS1

Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.00152 (232/152260) while in subpopulation AFR AF = 0.00532 (221/41556). AF 95% confidence interval is 0.00474. There are 0 homozygotes in GnomAd4. There are 123 alleles in the male GnomAd4 subpopulation. Median coverage is 33. This position passed quality control check.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001040108.2. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MLH3	NM_001040108.2	MANE Select	c.2167G>A	p.Val723Ile	missense	Exon 2 of 13	NP_001035197.1	Q9UHC1-1
	MLH3	NM_014381.3		c.2167G>A	p.Val723Ile	missense	Exon 2 of 12	NP_055196.2	Q9UHC1-2

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
MLH3	ENST00000355774.7	TSL:5 MANE Select	c.2167G>A	p.Val723Ile	missense	Exon 2 of 13	ENSP00000348020.2	Q9UHC1-1
MLH3	ENST00000380968.6	TSL:1	c.2167G>A	p.Val723Ile	missense	Exon 2 of 12	ENSP00000370355.3	Q9UHC1-2
MLH3	ENST00000930871.1		c.2167G>A	p.Val723Ile	missense	Exon 2 of 13	ENSP00000600930.1

Frequencies

GnomAD3 genomes

AF:

0.00152

AC:

231

AN:

152142

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00531

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000328

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000384

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00191

GnomAD2 exomes

AF:

0.000382

AC:

AN:

251346

AF XY:

0.000287

show subpopulations

Gnomad AFR exome

AF:

0.00474

Gnomad AMR exome

AF:

0.000434

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000544

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000880

Gnomad OTH exome

AF:

0.000163

GnomAD4 exome

AF:

0.000153

AC:

223

AN:

1461762

Hom.:

Cov.:

AF XY:

0.000143

AC XY:

104

AN XY:

727186

show subpopulations

African (AFR)

AF:

0.00520

AC:

174

AN:

33480

American (AMR)

AF:

0.000425

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26132

East Asian (EAS)

AF:

0.0000252

AC:

AN:

39686

South Asian (SAS)

AF:

0.0000348

AC:

AN:

86256

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53368

Middle Eastern (MID)

AF:

0.000520

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.00000450

AC:

AN:

1111954

Other (OTH)

AF:

0.000298

AC:

AN:

60394

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.471

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.00152

AC:

232

AN:

152260

Hom.:

Cov.:

AF XY:

0.00165

AC XY:

123

AN XY:

74448

show subpopulations

African (AFR)

AF:

0.00532

AC:

221

AN:

41556

American (AMR)

AF:

0.000327

AC:

AN:

15274

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3468

East Asian (EAS)

AF:

0.000385

AC:

AN:

5190

South Asian (SAS)

AF:

0.00

AC:

AN:

4824

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10604

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

68024

Other (OTH)

AF:

0.00189

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.509

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.000555

Hom.:

Bravo

AF:

0.00166

ESP6500AA

AF:

0.00454

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.000478

AC:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.00

ClinVar

ClinVar submissions

Significance:Conflicting classifications of pathogenicity

Revision:criteria provided, conflicting classifications

View on ClinVar

Pathogenic

VUS

Benign

Condition

Colorectal cancer, hereditary nonpolyposis, type 7 (2)

not specified (2)

Colorectal cancer;C0476089:Endometrial carcinoma;C1858380:Colorectal cancer, hereditary nonpolyposis, type 7 (1)

not provided (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.070

BayesDel_addAF

Benign

-0.68

BayesDel_noAF

Benign

-0.74

CADD

Benign

0.020

(source)

DANN

Benign

0.63

DEOGEN2

Benign

0.083

Eigen

Benign

-1.5

Eigen_PC

Benign

-1.5

FATHMM_MKL

Benign

0.018

LIST_S2

Benign

0.51

M_CAP

Benign

0.0062

MetaRNN

Benign

0.0053

MetaSVM

Benign

-1.0

MutationAssessor

Benign

0.79

PhyloP100

-0.62

PrimateAI

Benign

0.22

PROVEAN

Benign

-0.20

REVEL

Benign

0.0030

Sift

Benign

0.26

Sift4G

Benign

0.59

Polyphen

0.032

Vest4

0.041

MVP

0.19

MPC

0.081

ClinPred

0.0034

GERP RS

-3.9

Varity_R

0.037

gMVP

0.10

Mutation Taster

=291/9

polymorphism

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over