NM_021614.4:c.329C>T

Variant names:

Variant summary

Our verdict is Benign. The variant received -7 ACMG points: 1P and 8B. PP2BP4_ModerateBP6_ModerateBS2

The NM_021614.4(KCNN2):c.329C>T(p.Ser110Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000935 in 438,396 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 7/9 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★).

Frequency

Genomes: 𝑓 0.000059 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00011 ( 0 hom. )

Consequence

KCNN2
NM_021614.4 missense

Scores

Clinical Significance

Likely benign criteria provided, single submitter B:1

Conservation

PhyloP100: 2.39

Publications

0 publications found

Variant links:

Genes affected

KCNN2 (HGNC:6291): (potassium calcium-activated channel subfamily N member 2) Action potentials in vertebrate neurons are followed by an afterhyperpolarization (AHP) that may persist for several seconds and may have profound consequences for the firing pattern of the neuron. Each component of the AHP is kinetically distinct and is mediated by different calcium-activated potassium channels. The protein encoded by this gene is activated before membrane hyperpolarization and is thought to regulate neuronal excitability by contributing to the slow component of synaptic AHP. This gene is a member of the KCNN family of potassium channel genes. The encoded protein is an integral membrane protein that forms a voltage-independent calcium-activated channel with three other calmodulin-binding subunits. Alternate splicing of this gene results in multiple transcript variants. [provided by RefSeq, May 2013]

KCNN2 Gene-Disease associations (from GenCC):

neurodevelopmental disorder with or without variable movement or behavioral abnormalities
Inheritance: AD Classification: STRONG, MODERATE Submitted by: G2P, Labcorp Genetics (formerly Invitae)

KCNN2 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -7 ACMG points.

PP2

Missense variant in the gene, where a lot of missense mutations are associated with disease in ClinVar. The gene has 7 curated pathogenic missense variants (we use a threshold of 10). The gene has 1 curated benign missense variants. Gene score misZ: 2.2857 (below the threshold of 3.09). Trascript score misZ: 1.564 (below the threshold of 3.09). GenCC associations: The gene is linked to neurodevelopmental disorder with or without variable movement or behavioral abnormalities.

BP4

Computational evidence support a benign effect (MetaRNN=0.24077767).

BP6

Variant 5-114362468-C-T is Benign according to our data. Variant chr5-114362468-C-T is described in ClinVar as Likely_benign. ClinVar VariationId is 2655642.Status of the report is criteria_provided_single_submitter, 1 stars.

BS2

High AC in GnomAd4 at 9 AD gene.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_021614.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
KCNN2	NM_021614.4	MANE Select	c.329C>T	p.Ser110Leu	missense	Exon 1 of 8	NP_067627.3
KCNN2	NM_001372233.1		c.527C>T	p.Ser176Leu	missense	Exon 6 of 13	NP_001359162.1	A0A3F2YNY5
KCNN2	NR_174097.1		n.399C>T		non_coding_transcript_exon	Exon 1 of 7

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	KCNN2	ENST00000673685.1	MANE Select	c.329C>T	p.Ser110Leu	missense	Exon 1 of 8	ENSP00000501239.1	A0A669KBH3
	KCNN2	ENST00000512097.10	TSL:5	c.527C>T	p.Ser176Leu	missense	Exon 6 of 13	ENSP00000427120.4	A0A3F2YNY5

Frequencies

GnomAD3 genomes

AF:

0.0000591

AC:

AN:

152162

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000724

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000882

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.000112

AC:

AN:

286124

Hom.:

Cov.:

AF XY:

0.000108

AC XY:

AN XY:

148424

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

6498

American (AMR)

AF:

0.00

AC:

AN:

7338

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

9480

East Asian (EAS)

AF:

0.0000500

AC:

AN:

20002

South Asian (SAS)

AF:

0.000106

AC:

AN:

18844

European-Finnish (FIN)

AF:

0.0000437

AC:

AN:

22860

Middle Eastern (MID)

AF:

0.00

AC:

AN:

1418

European-Non Finnish (NFE)

AF:

0.000127

AC:

AN:

181680

Other (OTH)

AF:

0.000278

AC:

AN:

18004

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.491

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.0000591

AC:

AN:

152272

Hom.:

Cov.:

AF XY:

0.0000269

AC XY:

AN XY:

74456

show subpopulations

African (AFR)

AF:

0.0000722

AC:

AN:

41558

American (AMR)

AF:

0.00

AC:

AN:

15304

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5168

South Asian (SAS)

AF:

0.00

AC:

AN:

4830

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10624

Middle Eastern (MID)

AF:

0.00

AC:

AN:

292

European-Non Finnish (NFE)

AF:

0.0000882

AC:

AN:

67998

Other (OTH)

AF:

0.00

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.475

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.0000712

Hom.:

Bravo

AF:

0.0000718

Asia WGS

AF:

0.000289

AC:

AN:

3468

ClinVar

ClinVar submissions

Significance:Likely benign

Revision:criteria provided, single submitter

View on ClinVar

Pathogenic

VUS

Benign

Condition

not provided (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.34

BayesDel_noAF

Benign

-0.29

CADD

Pathogenic

(source)

DANN

Benign

0.97

FATHMM_MKL

Benign

0.74

LIST_S2

Benign

0.68

MetaRNN

Benign

0.24

PhyloP100

2.4

GERP RS

5.3

PromoterAI

0.0060

Neutral

(source)

Mutation Taster

=299/1

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

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over