rs267608022

Positions:

• chr2-47482858-C-A
• chr2-47482858-C-G
• chr2-47482858-C-T

Variant summary

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

The NM_000251.3(MSH2):​c.2714C>A​(p.Thr905Lys) 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. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. T905R) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 33)
• Consequence: MSH2 NM_000251.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.936

Genes affected

MSH2 (HGNC:7325): (mutS homolog 2) This locus is frequently mutated in hereditary nonpolyposis colon cancer (HNPCC). When cloned, it was discovered to be a human homolog of the E. coli mismatch repair gene mutS, consistent with the characteristic alterations in microsatellite sequences (RER+ phenotype) found in HNPCC. Two transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Apr 2012]

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=0.09857875).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
MSH2	NM_000251.3	c.2714C>A	p.Thr905Lys	missense_variant	16/16	ENST00000233146.7	NP_000242.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
MSH2	ENST00000233146.7	c.2714C>A	p.Thr905Lys	missense_variant	16/16	1	NM_000251.3	ENSP00000233146	P1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Hereditary cancer-predisposing syndrome Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Mar 31, 2021

The p.T905K variant (also known as c.2714C>A), located in coding exon 16 of the MSH2 gene, results from a C to A substitution at nucleotide position 2714. The threonine at codon 905 is replaced by lysine, an amino acid with similar properties. This amino acid position is not well conserved in available vertebrate species. In addition, the in silico prediction for this alteration is inconclusive. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.078
BayesDel_addAF	Uncertain	0.073	D
BayesDel_noAF	Benign	-0.13
CADD	Benign	6.4
DANN	Benign	0.91
DEOGEN2	Benign	0.30	T;.
Eigen	Benign	-0.83
Eigen_PC	Benign	-0.68
FATHMM_MKL	Benign	0.14	N
LIST_S2	Benign	0.60	T;T
M_CAP	Benign	0.019	T
MetaRNN	Benign	0.099	T;T
MetaSVM	Benign	-0.81	T
MutationAssessor	Benign	0.13	N;.
MutationTaster	Benign	0.94	D;N;N
PrimateAI	Benign	0.34	T
PROVEAN	Benign	0.19	N;N
REVEL	Uncertain	0.38
Sift	Benign	0.49	T;T
Sift4G	Benign	0.32	T;T
Polyphen		0.0	B;.
Vest4		0.24
MutPred		0.63		Loss of loop (P = 9e-04);.;
MVP		0.89
MPC		0.0061
ClinPred		0.19	T
GERP RS		2.5
Varity_R		0.089
gMVP		0.27

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr2-47709997;