19-47476834-C-T

Variant names:

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 2P and 5B. PM2BP4_StrongBP6

The NM_007059.4(KPTN):c.968G>A(p.Arg323Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000689 in 1,582,272 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R323W) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000046 ( 0 hom., cov: 27)

Exomes 𝑓: 0.000071 ( 0 hom. )

Consequence

KPTN
NM_007059.4 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1B:1

Conservation

PhyloP100: -0.578

Publications

0 publications found

Variant links:

Genes affected

KPTN (HGNC:6404): (kaptin, actin binding protein) This gene encodes a filamentous-actin-associated protein, which is involved in actin dynamics and plays an important role in neuromorphogenesis. This protein is part of the KICSTOR protein complex that localizes to lysosomes. Mutations in this gene result in an autosomal recessive form of intellectual disability. Alternatively spliced transcript variants have been found for this gene. [provided by RefSeq, Jul 2017]

KPTN Gene-Disease associations (from GenCC):

macrocephaly-developmental delay syndrome
Inheritance: AR Classification: STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Orphanet

KPTN links:

ENSG00000287896 (HGNC:):

ENSG00000287896 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -3 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.012508959).

BP6

Variant 19-47476834-C-T is Benign according to our data. Variant chr19-47476834-C-T is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 474858.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_007059.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
KPTN	NM_007059.4	MANE Select	c.968G>A	p.Arg323Gln	missense	Exon 10 of 12	NP_008990.2
KPTN	NM_001291296.2		c.800G>A	p.Arg267Gln	missense	Exon 8 of 10	NP_001278225.1
KPTN	NR_111923.2		n.1114G>A		non_coding_transcript_exon	Exon 11 of 13

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
KPTN	ENST00000338134.8	TSL:1 MANE Select	c.968G>A	p.Arg323Gln	missense	Exon 10 of 12	ENSP00000337850.2
KPTN	ENST00000594208.5	TSL:2	n.*602G>A		non_coding_transcript_exon	Exon 11 of 13	ENSP00000470364.1
ENSG00000287896	ENST00000669287.1		n.441C>T		non_coding_transcript_exon	Exon 2 of 2

Frequencies

GnomAD3 genomes

AF:

0.0000460

AC:

AN:

152100

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

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:

0.000103

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000722

AC:

AN:

193924

AF XY:

0.0000864

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000141

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000107

Gnomad OTH exome

AF:

0.000201

GnomAD4 exome

AF:

0.0000713

AC:

102

AN:

1430054

Hom.:

Cov.:

AF XY:

0.0000621

AC XY:

AN XY:

708278

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

32942

American (AMR)

AF:

0.000127

AC:

AN:

39518

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25436

East Asian (EAS)

AF:

0.00

AC:

AN:

38192

South Asian (SAS)

AF:

0.0000122

AC:

AN:

81980

European-Finnish (FIN)

AF:

0.00

AC:

AN:

51146

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5722

European-Non Finnish (NFE)

AF:

0.0000858

AC:

AN:

1095888

Other (OTH)

AF:

0.0000338

AC:

AN:

59230

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.460

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:

0.0000460

AC:

AN:

152218

Hom.:

Cov.:

AF XY:

0.0000538

AC XY:

AN XY:

74410

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41560

American (AMR)

AF:

0.00

AC:

AN:

15292

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3464

East Asian (EAS)

AF:

0.00

AC:

AN:

5142

South Asian (SAS)

AF:

0.00

AC:

AN:

4824

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10602

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000103

AC:

AN:

68016

Other (OTH)

AF:

0.00

AC:

AN:

2112

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.539

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:

0.000113

Hom.:

Bravo

AF:

0.0000453

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000120

AC:

ExAC

AF:

0.0000665

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:1Benign:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Macrocephaly-developmental delay syndrome

Uncertain:1

Aug 30, 2021

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Inborn genetic diseases

Benign:1

Nov 20, 2024

Ambry Genetics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity.

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.061

BayesDel_addAF

Benign

-0.56

BayesDel_noAF

Benign

-0.78

CADD

Benign

4.7

(source)

DANN

Benign

0.83

DEOGEN2

Benign

0.0094

Eigen

Benign

-1.6

Eigen_PC

Benign

-1.6

FATHMM_MKL

Benign

0.011

LIST_S2

Benign

0.62

M_CAP

Benign

0.0016

MetaRNN

Benign

0.013

MetaSVM

Benign

-0.99

MutationAssessor

Benign

-0.28

PhyloP100

-0.58

PrimateAI

Benign

0.20

PROVEAN

Benign

0.96

REVEL

Benign

0.019

Sift

Benign

1.0

Sift4G

Benign

1.0

Polyphen

0.0

Vest4

0.022

MVP

0.16

MPC

0.45

ClinPred

0.020

GERP RS

-4.7

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.014

gMVP

0.27

Mutation Taster

=93/7

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

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over