NM_022055.2:c.1286C>A

Variant names:

• chr2-47520914-G-T
• rs988051078
• NM_022055.2:c.1286C>A

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_022055.2(KCNK12):​c.1286C>A​(p.Ser429Tyr) variant causes a missense change. The variant allele was found at a frequency of 0.000000909 in 1,100,166 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. S429C) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 9.1e-7 (0 hom.)
• Consequence: KCNK12 NM_022055.2 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 4.00
• 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 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.26002443).

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.1286C>A	p.Ser429Tyr	missense	Exon 2 of 2	NP_071338.1	Q9HB15
	MSH2	NM_001406674.1		c.2752+8494G>T		intron	N/A	NP_001393603.1
	MSH2	NM_001406631.1		c.2752+8494G>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.1286C>A	p.Ser429Tyr	missense	Exon 2 of 2	ENSP00000327611.3	Q9HB15
	MSH2	ENST00000645506.1		c.2752+8494G>T		intron	N/A	ENSP00000495455.1	A0A2R8Y6P0
	MSH2	ENST00000644092.1		n.*1052+8494G>T		intron	N/A	ENSP00000496351.1	A0A2R8Y7S8

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 9.09e-7 AC: 1 AN: 1100166 Hom.: 0 Cov.: 29 AF XY: 0.00000191 AC XY: 1 AN XY: 522686

African (AFR) AF: 0.00 AC: 0 AN: 23136

American (AMR) AF: 0.00 AC: 0 AN: 9144

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 14712

East Asian (EAS) AF: 0.00 AC: 0 AN: 26608

South Asian (SAS) AF: 0.00 AC: 0 AN: 26346

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 22222

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 3632

European-Non Finnish (NFE) AF: 0.00000108 AC: 1 AN: 929960

Other (OTH) AF: 0.00 AC: 0 AN: 44406

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.37
BayesDel_addAF	Benign	-0.099	T
BayesDel_noAF	Benign	-0.38
CADD	Pathogenic	26
DANN	Uncertain	0.99
DEOGEN2	Benign	0.084	T
Eigen	Uncertain	0.50
Eigen_PC	Uncertain	0.56
FATHMM_MKL	Benign	0.74	D
LIST_S2	Benign	0.54	T
M_CAP	Uncertain	0.098	D
MetaRNN	Benign	0.26	T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	1.8	L
PhyloP100		4.0
PrimateAI	Uncertain	0.66	T
PROVEAN	Benign	-2.1	N
REVEL	Benign	0.13
Sift	Uncertain	0.012	D
Sift4G	Uncertain	0.0080	D
Polyphen		0.90	P
Vest4		0.30
MutPred		0.28		Loss of glycosylation at S429 (P = 0.0225)
MVP		0.11
MPC		2.5
ClinPred		0.87	D
GERP RS		5.1
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.8
Varity_R		0.38
gMVP		0.49
Mutation Taster		=56/44	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.040		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

dbSNP: rs988051078; hg19: chr2-47748053;