NM_022055.2:c.1202G>A

Variant names:

• chr2-47520998-C-T
• NM_022055.2:c.1202G>A

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 2P and 1B. PM2 BP4

The NM_022055.2(KCNK12):​c.1202G>A​(p.Cys401Tyr) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: KCNK12 NM_022055.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 4.96
• Publications: 0 publications found

Genes affected

KCNK12 (HGNC:6274): (potassium two pore domain channel subfamily K member 12) This gene encodes one of the members of the superfamily of potassium channel proteins containing two pore-forming P domains. The product of this gene has not been shown to be a functional channel, however, it may require other non-pore-forming proteins for activity. [provided by RefSeq, Jul 2008]

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]

MSH2 Gene-Disease associations (from GenCC):

• Lynch syndrome

  Inheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: ClinGen, Orphanet, G2P
• Lynch syndrome 1

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Genomics England PanelApp, Ambry Genetics, Labcorp Genetics (formerly Invitae)
• Muir-Torre syndrome

  Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Genomics England PanelApp, Orphanet, G2P
• mismatch repair cancer syndrome 1

  Inheritance: AR Classification: DEFINITIVE, SUPPORTIVE Submitted by: ClinGen, Orphanet
• mismatch repair cancer syndrome 2

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: G2P, Labcorp Genetics (formerly Invitae)
• ovarian cancer

  Inheritance: AD Classification: STRONG Submitted by: Genomics England PanelApp
• malignant pancreatic neoplasm

  Inheritance: AD Classification: MODERATE Submitted by: Genomics England PanelApp
• prostate cancer

  Inheritance: AD Classification: MODERATE Submitted by: Ambry Genetics
• rhabdomyosarcoma

  Inheritance: AR Classification: MODERATE Submitted by: Genomics England PanelApp
• breast cancer

  Inheritance: AD Classification: NO_KNOWN Submitted by: Ambry Genetics
• hereditary breast carcinoma

  Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen

ACMG classification

Our verdict: Uncertain_significance. The variant received 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.42019868).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_022055.2. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	KCNK12	NM_022055.2	MANE Select	c.1202G>A	p.Cys401Tyr	missense	Exon 2 of 2	NP_071338.1	Q9HB15
	MSH2	NM_001406674.1		c.2752+8578C>T		intron	N/A	NP_001393603.1
	MSH2	NM_001406631.1		c.2752+8578C>T		intron	N/A	NP_001393560.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	KCNK12	ENST00000327876.5	TSL:1 MANE Select	c.1202G>A	p.Cys401Tyr	missense	Exon 2 of 2	ENSP00000327611.3	Q9HB15
	MSH2	ENST00000645506.1		c.2752+8578C>T		intron	N/A	ENSP00000495455.1	A0A2R8Y6P0
	MSH2	ENST00000644092.1		n.*1052+8578C>T		intron	N/A	ENSP00000496351.1	A0A2R8Y7S8

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 1215898 Hom.: 0 Cov.: 29 AF XY: 0.00 AC XY: 0 AN XY: 593608

African (AFR) AF: 0.00 AC: 0 AN: 24798

American (AMR) AF: 0.00 AC: 0 AN: 17086

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 20108

East Asian (EAS) AF: 0.00 AC: 0 AN: 27334

South Asian (SAS) AF: 0.00 AC: 0 AN: 54384

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 28786

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5008

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 989382

Other (OTH) AF: 0.00 AC: 0 AN: 49012

GnomAD4 genome Cov.: 33

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	not specified (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.30
BayesDel_addAF	Pathogenic	0.20	D
BayesDel_noAF	Uncertain	0.050
CADD	Benign	23
DANN	Uncertain	0.99
DEOGEN2	Benign	0.078	T
Eigen	Uncertain	0.39
Eigen_PC	Uncertain	0.45
FATHMM_MKL	Uncertain	0.78	D
LIST_S2	Benign	0.79	T
M_CAP	Pathogenic	0.49	D
MetaRNN	Benign	0.42	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	1.6	L
PhyloP100		5.0
PrimateAI	Pathogenic	0.94	D
PROVEAN	Benign	-0.51	N
REVEL	Benign	0.27
Sift	Benign	1.0	T
Sift4G	Benign	1.0	T
Polyphen		0.93	P
Vest4		0.43
MutPred		0.29		Gain of sheet (P = 0.039)
MVP		0.72
MPC		2.3
ClinPred		0.85	D
GERP RS		5.1
Varity_R		0.30
gMVP		0.63
Mutation Taster		=43/57	disease causing

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.030		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

hg19: chr2-47748137;