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NM_000249.4(MLH1):c.676C>T (p.Arg226Ter) AND not provided

Germline classification:
Pathogenic (8 submissions)
Last evaluated:
Jul 1, 2024
Review status:
2 stars out of maximum of 4 stars
criteria provided, multiple submitters, no conflicts
Somatic classification
of clinical impact:
None
Review status:
(0/4) 0 stars out of maximum of 4 stars
no assertion criteria provided
Somatic classification
of oncogenicity:
None
Review status:
(0/4) 0 stars out of maximum of 4 stars
no assertion criteria provided
Record status:
current
Accession:
RCV000202205.21

Allele description [Variation Report for NM_000249.4(MLH1):c.676C>T (p.Arg226Ter)]

NM_000249.4(MLH1):c.676C>T (p.Arg226Ter)

Gene:
MLH1:mutL homolog 1 [Gene - OMIM - HGNC]
Variant type:
single nucleotide variant
Cytogenetic location:
3p22.2
Genomic location:
Preferred name:
NM_000249.4(MLH1):c.676C>T (p.Arg226Ter)
Other names:
p.R226*:CGA>TGA
HGVS:
  • NC_000003.12:g.37012098C>T
  • NG_007109.2:g.23749C>T
  • NM_000249.4:c.676C>TMANE SELECT
  • NM_001167617.3:c.382C>T
  • NM_001167618.3:c.-48C>T
  • NM_001167619.3:c.-48C>T
  • NM_001258271.2:c.676C>T
  • NM_001258273.2:c.-48C>T
  • NM_001258274.3:c.-48C>T
  • NM_001354615.2:c.-48C>T
  • NM_001354616.2:c.-48C>T
  • NM_001354617.2:c.-48C>T
  • NM_001354618.2:c.-48C>T
  • NM_001354619.2:c.-48C>T
  • NM_001354620.2:c.382C>T
  • NM_001354621.2:c.-141C>T
  • NM_001354622.2:c.-254C>T
  • NM_001354623.2:c.-254C>T
  • NM_001354624.2:c.-151C>T
  • NM_001354625.2:c.-151C>T
  • NM_001354626.2:c.-151C>T
  • NM_001354627.2:c.-151C>T
  • NM_001354628.2:c.676C>T
  • NM_001354629.2:c.577C>T
  • NM_001354630.2:c.676C>T
  • NP_000240.1:p.Arg226Ter
  • NP_000240.1:p.Arg226Ter
  • NP_001161089.1:p.Arg128Ter
  • NP_001245200.1:p.Arg226Ter
  • NP_001341549.1:p.Arg128Ter
  • NP_001341557.1:p.Arg226Ter
  • NP_001341558.1:p.Arg193Ter
  • NP_001341559.1:p.Arg226Ter
  • LRG_216t1:c.676C>T
  • LRG_216:g.23749C>T
  • LRG_216p1:p.Arg226Ter
  • NC_000003.11:g.37053589C>T
  • NM_000249.3:c.676C>T
  • NM_001167617.1:c.382C>T
  • p.Arg226*
  • p.Arg226Stop
  • p.R226*
Protein change:
R128*; ARG226TER
Links:
OMIM: 120436.0010; dbSNP: rs63751615
NCBI 1000 Genomes Browser:
rs63751615
Molecular consequence:
  • NM_001167618.3:c.-48C>T - 5 prime UTR variant - [Sequence Ontology: SO:0001623]
  • NM_001167619.3:c.-48C>T - 5 prime UTR variant - [Sequence Ontology: SO:0001623]
  • NM_001258273.2:c.-48C>T - 5 prime UTR variant - [Sequence Ontology: SO:0001623]
  • NM_001258274.3:c.-48C>T - 5 prime UTR variant - [Sequence Ontology: SO:0001623]
  • NM_001354615.2:c.-48C>T - 5 prime UTR variant - [Sequence Ontology: SO:0001623]
  • NM_001354616.2:c.-48C>T - 5 prime UTR variant - [Sequence Ontology: SO:0001623]
  • NM_001354617.2:c.-48C>T - 5 prime UTR variant - [Sequence Ontology: SO:0001623]
  • NM_001354618.2:c.-48C>T - 5 prime UTR variant - [Sequence Ontology: SO:0001623]
  • NM_001354619.2:c.-48C>T - 5 prime UTR variant - [Sequence Ontology: SO:0001623]
  • NM_001354621.2:c.-141C>T - 5 prime UTR variant - [Sequence Ontology: SO:0001623]
  • NM_001354622.2:c.-254C>T - 5 prime UTR variant - [Sequence Ontology: SO:0001623]
  • NM_001354623.2:c.-254C>T - 5 prime UTR variant - [Sequence Ontology: SO:0001623]
  • NM_001354624.2:c.-151C>T - 5 prime UTR variant - [Sequence Ontology: SO:0001623]
  • NM_001354625.2:c.-151C>T - 5 prime UTR variant - [Sequence Ontology: SO:0001623]
  • NM_001354626.2:c.-151C>T - 5 prime UTR variant - [Sequence Ontology: SO:0001623]
  • NM_001354627.2:c.-151C>T - 5 prime UTR variant - [Sequence Ontology: SO:0001623]
  • NM_000249.4:c.676C>T - nonsense - [Sequence Ontology: SO:0001587]
  • NM_001167617.3:c.382C>T - nonsense - [Sequence Ontology: SO:0001587]
  • NM_001258271.2:c.676C>T - nonsense - [Sequence Ontology: SO:0001587]
  • NM_001354620.2:c.382C>T - nonsense - [Sequence Ontology: SO:0001587]
  • NM_001354628.2:c.676C>T - nonsense - [Sequence Ontology: SO:0001587]
  • NM_001354629.2:c.577C>T - nonsense - [Sequence Ontology: SO:0001587]
  • NM_001354630.2:c.676C>T - nonsense - [Sequence Ontology: SO:0001587]
Observations:
4

Condition(s)

Synonyms:
none provided
Identifiers:
MedGen: C3661900

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Assertion and evidence details

Submission AccessionSubmitterReview Status
(Assertion method)
Clinical Significance
(Last evaluated)
OriginMethodCitations
SCV000149394GeneDx
criteria provided, single submitter

(GeneDx Variant Classification Process June 2021)
Pathogenic
(Aug 22, 2019)
germlineclinical testing

Citation Link,

SCV000257111Mayo Clinic Laboratories, Mayo Clinic
no assertion criteria provided
Pathogenicunknownresearch

SCV000601407Quest Diagnostics Nichols Institute San Juan Capistrano
criteria provided, single submitter

(Quest Diagnostics criteria)
Pathogenic
(May 12, 2021)
unknownclinical testing

PubMed (10)
[See all records that cite these PMIDs]

SCV001552418Department of Pathology and Laboratory Medicine, Sinai Health System - The Canadian Open Genetics Repository (COGR)

See additional submitters

no assertion criteria provided
Uncertain significanceunknownclinical testing

SCV001740166Diagnostic Laboratory, Department of Genetics, University Medical Center Groningen - VKGL Data-share Consensus
no assertion criteria provided
Pathogenicgermlineclinical testing

SCV001953289Joint Genome Diagnostic Labs from Nijmegen and Maastricht, Radboudumc and MUMC+ - VKGL Data-share Consensus

See additional submitters

no assertion criteria provided
Pathogenicgermlineclinical testing

SCV003821573Revvity Omics, Revvity
criteria provided, single submitter

(ACMG Guidelines, 2015)
Pathogenic
(Apr 11, 2022)
germlineclinical testing

PubMed (1)
[See all records that cite this PMID]

SCV005093181CeGaT Center for Human Genetics Tuebingen
criteria provided, single submitter

(CeGaT Center For Human Genetics Tuebingen Variant Classification Criteria Version 2)
Pathogenic
(Jul 1, 2024)
germlineclinical testing

Citation Link

Summary from all submissions

EthnicityOriginAffectedIndividualsFamiliesChromosomes testedNumber TestedFamily historyMethod
not providedunknownyes2not providednot providednot providednot providedclinical testing
not providedunknownunknown1not providednot providednot providednot providedclinical testing, research
not providedgermlineyes1not providednot providednot providednot providedclinical testing
not providedgermlineunknownnot providednot providednot providednot providednot providedclinical testing

Citations

PubMed

Human MLH1 deficiency predisposes to hematological malignancy and neurofibromatosis type 1.

Ricciardone MD, Ozçelik T, Cevher B, Ozdağ H, Tuncer M, Gürgey A, Uzunalimoğlu O, Cetinkaya H, Tanyeli A, Erken E, Oztürk M.

Cancer Res. 1999 Jan 15;59(2):290-3.

PubMed [citation]
PMID:
9927033

Comprehensive Constitutional Genetic and Epigenetic Characterization of Lynch-Like Individuals.

Dámaso E, González-Acosta M, Vargas-Parra G, Navarro M, Balmaña J, Ramon Y Cajal T, Tuset N, Thompson BA, Marín F, Fernández A, Gómez C, Velasco À, Solanes A, Iglesias S, Urgel G, López C, Del Valle J, Campos O, Santacana M, Matias-Guiu X, Lázaro C, Valle L, et al.

Cancers (Basel). 2020 Jul 5;12(7). doi:pii: E1799. 10.3390/cancers12071799.

PubMed [citation]
PMID:
32635641
PMCID:
PMC7408773
See all PubMed Citations (11)

Details of each submission

From GeneDx, SCV000149394.15

#EthnicityIndividualsChromosomes TestedFamily HistoryMethodCitations
1not providednot providednot providednot providedclinical testingnot provided

Description

Nonsense variant predicted to result in protein truncation or nonsense mediated decay in a gene for which loss-of-function is a known mechanism of disease; Not observed at a significant frequency in large population cohorts (Lek 2016); Truncating variants in this gene are considered pathogenic by a well-established clinical consortium and/or database; This variant is associated with the following publications: (PMID: 27601186, 25980754, 28514183, 10874307, 21056691, 21868491, 21247423, 20924129, 20045164, 19690142, 18307539, 15655560, 9927033, 8872463, 23047549, 25525159, 17889038, 22949379, 15849733, 12624141, 21879275, 22776989, 9472100, 24344984, 24456667, 28445943, 26681312, 28449805, 28944238, 11343035, 28502729, 29478780, 28874130, 30521064, 30720243, 30262796, 29505604, 30998989, 29625052, 30217226, 32719484)

#SampleMethodObservation
OriginAffectedNumber testedTissuePurposeMethodIndividualsAllele frequencyFamiliesCo-occurrences
1germlineyesnot providednot providednot providednot providednot providednot providednot provided

From Mayo Clinic Laboratories, Mayo Clinic, SCV000257111.1

#EthnicityIndividualsChromosomes TestedFamily HistoryMethodCitations
1not provided1not providednot providedresearchnot provided
#SampleMethodObservation
OriginAffectedNumber testedTissuePurposeMethodIndividualsAllele frequencyFamiliesCo-occurrences
1unknownunknownnot providednot providednot provided1not providednot providednot provided

From Quest Diagnostics Nichols Institute San Juan Capistrano, SCV000601407.4

#EthnicityIndividualsChromosomes TestedFamily HistoryMethodCitations
1not providednot providednot providednot providedclinical testing PubMed (10)

Description

This variant causes the premature termination of MLH1 protein synthesis. In the published literature, this variant has been reported in individuals and families with Lynch syndrome (PMIDs: 32635641 (2020), 28944238 (2017), 28874130 (2017), 21247423 (2011), 23047549 (2012)), and constitutional mismatch repair deficiency (CMMRD) syndrome (PMID: 17889038 (2008)). The frequency of this variant in the general population, 0.000004 (1/250982 chromosomes (Genome Aggregation Database, http://gnomad.broadinstitute.org)), is consistent with pathogenicity. Analysis of this variant using software algorithms for the prediction of the effect of nucleotide changes on splicing yielded predictions that this variant does not affect MLH1 mRNA splicing . Based on the available information, this variant is classified as pathogenic.

#SampleMethodObservation
OriginAffectedNumber testedTissuePurposeMethodIndividualsAllele frequencyFamiliesCo-occurrences
1unknownunknownnot providednot providednot providednot providednot providednot providednot provided

From Department of Pathology and Laboratory Medicine, Sinai Health System - The Canadian Open Genetics Repository (COGR), SCV001552418.1

#EthnicityIndividualsChromosomes TestedFamily HistoryMethodCitations
1not provided2not providednot providedclinical testingnot provided
#SampleMethodObservation
OriginAffectedNumber testedTissuePurposeMethodIndividualsAllele frequencyFamiliesCo-occurrences
1unknownyesnot providednot providednot provided2not providednot providednot provided

From Diagnostic Laboratory, Department of Genetics, University Medical Center Groningen - VKGL Data-share Consensus, SCV001740166.3

#EthnicityIndividualsChromosomes TestedFamily HistoryMethodCitations
1not providednot providednot providednot providedclinical testingnot provided
#SampleMethodObservation
OriginAffectedNumber testedTissuePurposeMethodIndividualsAllele frequencyFamiliesCo-occurrences
1germlineyesnot providednot providednot providednot providednot providednot providednot provided

From Joint Genome Diagnostic Labs from Nijmegen and Maastricht, Radboudumc and MUMC+ - VKGL Data-share Consensus, SCV001953289.1

#EthnicityIndividualsChromosomes TestedFamily HistoryMethodCitations
1not providednot providednot providednot providedclinical testingnot provided
#SampleMethodObservation
OriginAffectedNumber testedTissuePurposeMethodIndividualsAllele frequencyFamiliesCo-occurrences
1germlineyesnot providednot providednot providednot providednot providednot providednot provided

From Revvity Omics, Revvity, SCV003821573.2

#EthnicityIndividualsChromosomes TestedFamily HistoryMethodCitations
1not providednot providednot providednot providedclinical testing PubMed (1)
#SampleMethodObservation
OriginAffectedNumber testedTissuePurposeMethodIndividualsAllele frequencyFamiliesCo-occurrences
1germlineunknownnot providednot providednot providednot providednot providednot providednot provided

From CeGaT Center for Human Genetics Tuebingen, SCV005093181.3

#EthnicityIndividualsChromosomes TestedFamily HistoryMethodCitations
1not provided1not providednot providedclinical testingnot provided

Description

MLH1: PVS1, PP1:Strong, PM2, PS4:Moderate

#SampleMethodObservation
OriginAffectedNumber testedTissuePurposeMethodIndividualsAllele frequencyFamiliesCo-occurrences
1germlineyesnot providednot providednot provided1not providednot providednot provided

Last Updated: Oct 20, 2024