7-5997374-C-G

Position:

• chr7-5997374-C-G

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM1 PM2

The NM_000535.7(PMS2):​c.755G>C​(p.Cys252Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another nucleotide change resulting in same amino acid change has been previously reported as Uncertain significancein ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. C252Y) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 29)
• Consequence: PMS2 NM_000535.7 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 3.32

Genes affected

PMS2 (HGNC:9122): (PMS1 homolog 2, mismatch repair system component) The protein encoded by this gene is a key component of the mismatch repair system that functions to correct DNA mismatches and small insertions and deletions that can occur during DNA replication and homologous recombination. This protein forms heterodimers with the gene product of the mutL homolog 1 (MLH1) gene to form the MutL-alpha heterodimer. The MutL-alpha heterodimer possesses an endonucleolytic activity that is activated following recognition of mismatches and insertion/deletion loops by the MutS-alpha and MutS-beta heterodimers, and is necessary for removal of the mismatched DNA. There is a DQHA(X)2E(X)4E motif found at the C-terminus of the protein encoded by this gene that forms part of the active site of the nuclease. Mutations in this gene have been associated with hereditary nonpolyposis colorectal cancer (HNPCC; also known as Lynch syndrome) and Turcot syndrome. [provided by RefSeq, Apr 2016]

ACMG classification

Verdict is Uncertain_significance. Variant got 4 ACMG points.

• PM1: In a hotspot region, there are 2 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 1 benign, 17 uncertain in NM_000535.7
• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
PMS2	NM_000535.7	c.755G>C	p.Cys252Ser	missense_variant	7/15	ENST00000265849.12

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PMS2	ENST00000265849.12	c.755G>C	p.Cys252Ser	missense_variant	7/15	1	NM_000535.7	P3

Frequencies

GnomAD3 genomes Cov.: 29

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 29

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.23
BayesDel_addAF	Uncertain	0.14	D
BayesDel_noAF	Uncertain	-0.040
CADD	Uncertain	25
DANN	Uncertain	0.99
DEOGEN2	Benign	0.36	T;.;.;.;.;.
Eigen	Uncertain	0.35
Eigen_PC	Uncertain	0.39
FATHMM_MKL	Uncertain	0.81	D
LIST_S2	Uncertain	0.88	D;D;.;D;.;D
M_CAP	Benign	0.030	D
MetaRNN	Uncertain	0.65	D;D;D;D;D;D
MetaSVM	Uncertain	0.18	D
MutationAssessor	Uncertain	2.1	M;.;.;.;.;M
MutationTaster	Benign	1.0	D;D;D;D;D
PrimateAI	Uncertain	0.66	T
PROVEAN	Pathogenic	-4.8	D;D;.;.;.;D
REVEL	Uncertain	0.49
Sift	Benign	0.15	T;T;.;.;.;T
Sift4G	Benign	0.12	T;T;.;.;.;T
Polyphen		1.0	D;D;.;.;D;D
Vest4		0.60
MutPred		0.47		Gain of disorder (P = 0.0021);.;.;.;.;Gain of disorder (P = 0.0021);
MVP		0.90
MPC		0.14
ClinPred		0.98	D
GERP RS		5.5
Varity_R		0.74
gMVP		0.44

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

No publications associated with this variant yet.

Other links and lift over

hg19: chr7-6037005;