rs3774332

chr3-37033177-A-G

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_Strong BP6_Very_Strong BA1

The NM_000249.4(MLH1):c.1558+4245A>G variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0552 in 152,232 control chromosomes in the GnomAD database, including 276 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★★).

• Frequency: Genomes: 𝑓 0.055 (276 hom., cov: 32)
• Consequence: MLH1 NM_000249.4 intron
• Clinical Significance: Benign reviewed by expert panel B:1
• Conservation: PhyloP100: -0.701

Genes affected

MLH1 (HGNC:7127): (mutL homolog 1) The protein encoded by this gene can heterodimerize with mismatch repair endonuclease PMS2 to form MutL alpha, part of the DNA mismatch repair system. When MutL alpha is bound by MutS beta and some accessory proteins, the PMS2 subunit of MutL alpha introduces a single-strand break near DNA mismatches, providing an entry point for exonuclease degradation. The encoded protein is also involved in DNA damage signaling and can heterodimerize with DNA mismatch repair protein MLH3 to form MutL gamma, which is involved in meiosis. This gene was identified as a locus frequently mutated in hereditary nonpolyposis colon cancer (HNPCC). [provided by RefSeq, Aug 2017]

ACMG classification

Verdict is Benign. Variant got -20 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.81).
• BP6: Variant 3-37033177-A-G is Benign according to our data. Variant chr3-37033177-A-G is described in ClinVar as [Benign]. Clinvar id is 89776.Status of the report is reviewed_by_expert_panel, 3 stars. Variant chr3-37033177-A-G is described in Lovd as [Benign].
• BA1: GnomAd4 highest subpopulation (NFE) allele frequency at 95% confidence interval = 0.0718 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
MLH1	NM_000249.4	c.1558+4245A>G		intron_variant		ENST00000231790.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
MLH1	ENST00000231790.8	c.1558+4245A>G		intron_variant		1	NM_000249.4	P1

Frequencies

GnomAD3 genomes AF: 0.0552 AC: 8397 AN: 152114 Hom.: 276 Cov.: 32

Gnomad AFR AF: 0.0260

Gnomad AMI AF: 0.0747

Gnomad AMR AF: 0.0568

Gnomad ASJ AF: 0.101

Gnomad EAS AF: 0.0306

Gnomad SAS AF: 0.0458

Gnomad FIN AF: 0.0478

Gnomad MID AF: 0.0601

Gnomad NFE AF: 0.0735

Gnomad OTH AF: 0.0632

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.0552 AC: 8396 AN: 152232 Hom.: 276 Cov.: 32 AF XY: 0.0552 AC XY: 4107 AN XY: 74432

Gnomad4 AFR AF: 0.0259

Gnomad4 AMR AF: 0.0566

Gnomad4 ASJ AF: 0.101

Gnomad4 EAS AF: 0.0306

Gnomad4 SAS AF: 0.0454

Gnomad4 FIN AF: 0.0478

Gnomad4 NFE AF: 0.0735

Gnomad4 OTH AF: 0.0644

Alfa AF: 0.0723 Hom.: 628

Bravo AF: 0.0546

Asia WGS AF: 0.0310 AC: 107 AN: 3478

ClinVar

Significance: Benign

Submissions summary: Benign:1

Revision: reviewed by expert panel

Submissions by phenotype

Lynch syndrome Benign:1

Benign, reviewed by expert panel

research

International Society for Gastrointestinal Hereditary Tumours (InSiGHT)

Sep 05, 2013

MAF >1% -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.81
Cadd	Benign	0.22
Dann	Benign	0.62

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

Other links and lift over

dbSNP: rs3774332; hg19: chr3-37074668;