Genetic Variant PMS1:p.Gln437His (chr2-189854583-G-C) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_000534.5(PMS1):c.1311G>C(p.Gln437His) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,188 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/22 in silico tools predict 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: 6.8e-7 ( 0 hom. )

Consequence

PMS1
NM_000534.5 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: -0.134

Publications

1 publications found

Variant links:

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]

PMS1 Gene-Disease associations (from GenCC):

Lynch syndrome
Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen

PMS1 links:

ENSG00000300477 (HGNC:):

ENSG00000300477 links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.13475904).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000534.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
PMS1	NM_000534.5	MANE Select	c.1311G>C	p.Gln437His	missense	Exon 9 of 13	NP_000525.1
PMS1	NM_001321045.2		c.1311G>C	p.Gln437His	missense	Exon 10 of 14	NP_001307974.1
PMS1	NM_001321047.2		c.1311G>C	p.Gln437His	missense	Exon 9 of 13	NP_001307976.1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
PMS1	ENST00000441310.7	TSL:1 MANE Select	c.1311G>C	p.Gln437His	missense	Exon 9 of 13	ENSP00000406490.3
PMS1	ENST00000409593.5	TSL:1	c.666G>C	p.Gln222His	missense	Exon 4 of 7	ENSP00000387169.1
PMS1	ENST00000424059.1	TSL:1	n.1194G>C		non_coding_transcript_exon	Exon 7 of 9

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.84e-7

AC:

AN:

1461188

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

726950

show subpopulations

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR)

AF:

0.00

AC:

AN:

33460

American (AMR)

AF:

0.00

AC:

AN:

44722

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26124

East Asian (EAS)

AF:

0.00

AC:

AN:

39650

South Asian (SAS)

AF:

0.00

AC:

AN:

86230

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53376

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5764

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1111508

Other (OTH)

AF:

0.0000166

AC:

AN:

60354

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.325

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.12

BayesDel_addAF

Uncertain

0.10

BayesDel_noAF

Benign

-0.090

CADD

Benign

0.047

(source)

DANN

Benign

0.97

DEOGEN2

Benign

0.030

Eigen

Benign

-0.87

Eigen_PC

Benign

-1.1

FATHMM_MKL

Benign

0.075

LIST_S2

Benign

0.79

M_CAP

Benign

0.063

MetaRNN

Benign

0.13

MetaSVM

Uncertain

0.68

MutationAssessor

Uncertain

2.2

PhyloP100

-0.13

PrimateAI

Benign

0.28

PROVEAN

Benign

-1.4

REVEL

Uncertain

0.37

Sift

Uncertain

0.016

Sift4G

Benign

0.20

Polyphen

0.80

Vest4

0.20

MutPred

0.31

Loss of sheet (P = 0.0228)

MVP

0.97

MPC

0.24

ClinPred

0.20

GERP RS

-4.1

Varity_R

0.068

gMVP

0.35

Mutation Taster

=94/6

polymorphism

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

ClinVar

Computational scores

Splicing

Publications

Other links and lift over