2-189818038-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_000534.5(PMS1):c.440G>A(p.Arg147Lys) variant causes a missense 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. 16/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: PMS1 NM_000534.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.283

Genes affected

PMS1 (HGNC:9121): (PMS1 homolog 1, mismatch repair system component) This gene encodes a protein belonging to the DNA mismatch repair mutL/hexB family. This protein is thought to be involved in the repair of DNA mismatches, and it can form heterodimers with MLH1, a known DNA mismatch repair protein. Mutations in this gene cause hereditary nonpolyposis colorectal cancer type 3 (HNPCC3) either alone or in combination with mutations in other genes involved in the HNPCC phenotype, which is also known as Lynch syndrome. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.07351908).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
PMS1	NM_000534.5	c.440G>A	p.Arg147Lys	missense_variant	5/13	ENST00000441310.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PMS1	ENST00000441310.7	c.440G>A	p.Arg147Lys	missense_variant	5/13	1	NM_000534.5	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 28

GnomAD4 genome Cov.: 32

Bravo AF: 0.0000113

ESP6500AA AF: 0.000227 AC: 1

ESP6500EA AF: 0.00 AC: 0

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Lynch syndrome 1 Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Centre for Mendelian Genomics, University Medical Centre Ljubljana

Mar 27, 2020

This variant was classified as: Uncertain significance. The available evidence on this variant's pathogenicity is insufficient or conflicting. The following ACMG criteria were applied in classifying this variant: PM2,BP4. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.068
BayesDel_addAF	Benign	-0.036	T
BayesDel_noAF	Benign	-0.29
Cadd	Benign	1.6
Dann	Benign	0.66
DEOGEN2	Benign	0.0055	T;T;T;T;.;T;.;.
Eigen	Benign	-1.0
Eigen_PC	Benign	-0.87
FATHMM_MKL	Benign	0.32	N
LIST_S2	Benign	0.79	T;T;T;T;T;T;T;T
M_CAP	Benign	0.021	T
MetaRNN	Benign	0.074	T;T;T;T;T;T;T;T
MetaSVM	Benign	-0.78	T
MutationTaster	Benign	1.0	D;D;N;N;N
PrimateAI	Benign	0.42	T
Polyphen		0.0	.;B;B;B;.;.;.;.
Vest4		0.17, 0.18, 0.11, 0.16, 0.098
MVP		0.84
MPC		0.060
ClinPred		0.031	T
GERP RS		-4.3
Varity_R		0.047
gMVP		0.34

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: rs113137368; hg19: chr2-190682764; COSMIC: COSV59714884; COSMIC: COSV59714884;