14-75014035-C-T

Variant names:

• chr14-75014035-C-T
• rs1033159745
• NM_001040108.2:c.*3047G>A

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_001040108.2(MLH3):​c.*3047G>A variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: MLH3 NM_001040108.2 3_prime_UTR
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.203
• Publications: 0 publications found

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

ACMG classification

Our verdict: Likely_benign. The variant received -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.68).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MLH3	NM_001040108.2	c.*3047G>A		3_prime_UTR_variant	Exon 13 of 13	ENST00000355774.7	NP_001035197.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MLH3	ENST00000355774.7	c.*3047G>A		3_prime_UTR_variant	Exon 13 of 13	5	NM_001040108.2	ENSP00000348020.2
MLH3	ENST00000380968.6	c.*3047G>A		3_prime_UTR_variant	Exon 12 of 12	1		ENSP00000370355.3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 27922 Hom.: 0 Cov.: 0 AF XY: 0.00 AC XY: 0 AN XY: 12888

African (AFR) AF: 0.00 AC: 0 AN: 938

American (AMR) AF: 0.00 AC: 0 AN: 618

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 1728

East Asian (EAS) AF: 0.00 AC: 0 AN: 5682

South Asian (SAS) AF: 0.00 AC: 0 AN: 226

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 20

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 170

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 16276

Other (OTH) AF: 0.00 AC: 0 AN: 2264

GnomAD4 genome Cov.: 32

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000378

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.68
CADD	Benign	13
DANN	Benign	0.80
PhyloP100		-0.20

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

Other links and lift over

dbSNP: rs1033159745; hg19: chr14-75480738;