15-65077087-C-A

Variant names:

Variant summary

Our verdict is Likely benign. The variant received -6 ACMG points: 0P and 6B. BP4_ModerateBS2

The NM_001101362.3(KBTBD13):c.272C>A(p.Pro91Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000166 in 1,521,100 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.00014 ( 0 hom., cov: 34)

Exomes 𝑓: 0.00017 ( 0 hom. )

Consequence

KBTBD13
NM_001101362.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:3

Conservation

PhyloP100: 2.21

Publications

0 publications found

Variant links:

Genes affected

KBTBD13 (HGNC:37227): (kelch repeat and BTB domain containing 13) The gene belongs to a family of genes encoding proteins containing a BTB domain and several kelch repeats. The BTB domain functions as a protein-protein interaction module, which includes an ability to self-associate or to interact with non-BTB domain-containing proteins. The kelch motif typically occurs in groups of five to seven repeats, and has been found in proteins with diverse functions. Known functions of these family members include transcription regulation, ion channel tetramerization and gating, protein ubiquitination or degradation, and cytoskeleton regulation. The exact function of this family member has yet to be determined. [provided by RefSeq, Jun 2010]

KBTBD13 Gene-Disease associations (from GenCC):

nemaline myopathy 6
Inheritance: AD, Unknown Classification: DEFINITIVE, STRONG, MODERATE, LIMITED Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae), ClinGen, G2P
childhood-onset nemaline myopathy
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

KBTBD13 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -6 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.11367431).

BS2

High AC in GnomAd4 at 21 AD,Unknown gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
KBTBD13	NM_001101362.3 link	c.272C>A	p.Pro91Gln	missense_variant	Exon 1 of 1	ENST00000432196.5	NP_001094832.1	C9JR72

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
KBTBD13	ENST00000432196.5 link	c.272C>A	p.Pro91Gln	missense_variant	Exon 1 of 1	6	NM_001101362.3	ENSP00000388723.2		C9JR72

Frequencies

GnomAD3 genomes

AF:

0.000138

AC:

AN:

151972

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000242

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:

0.000294

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000588

AC:

AN:

119004

AF XY:

0.0000759

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000158

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000169

AC:

232

AN:

1369128

Hom.:

Cov.:

AF XY:

0.000163

AC XY:

110

AN XY:

675698

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

29242

American (AMR)

AF:

0.00

AC:

AN:

34104

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

24470

East Asian (EAS)

AF:

0.00

AC:

AN:

34292

South Asian (SAS)

AF:

0.00

AC:

AN:

77464

European-Finnish (FIN)

AF:

0.00

AC:

AN:

36422

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5526

European-Non Finnish (NFE)

AF:

0.000216

AC:

231

AN:

1070724

Other (OTH)

AF:

0.0000176

AC:

AN:

56884

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.503

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.000138

AC:

AN:

151972

Hom.:

Cov.:

AF XY:

0.000121

AC XY:

AN XY:

74272

show subpopulations

African (AFR)

AF:

0.0000242

AC:

AN:

41362

American (AMR)

AF:

0.00

AC:

AN:

15266

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3468

East Asian (EAS)

AF:

0.00

AC:

AN:

5190

South Asian (SAS)

AF:

0.00

AC:

AN:

4836

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10572

Middle Eastern (MID)

AF:

0.00

AC:

AN:

314

European-Non Finnish (NFE)

AF:

0.000294

AC:

AN:

67966

Other (OTH)

AF:

0.00

AC:

AN:

2086

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.561

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.000131

Hom.:

Bravo

AF:

0.000106

ExAC

AF:

0.0000131

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

KBTBD13-related disorder

Uncertain:1

Nov 29, 2023

PreventionGenetics, part of Exact Sciences

Significance:Uncertain significance

Review Status:no assertion criteria provided

Collection Method:clinical testing

The KBTBD13 c.272C>A variant is predicted to result in the amino acid substitution p.Pro91Gln. To our knowledge, this variant has not been reported in the literature. This variant is reported in 0.020% of alleles in individuals of European (Non-Finnish) descent in gnomAD. At this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. -

Inborn genetic diseases

Uncertain:1

Aug 12, 2024

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.272C>A (p.P91Q) alteration is located in exon 1 (coding exon 1) of the KBTBD13 gene. This alteration results from a C to A substitution at nucleotide position 272, causing the proline (P) at amino acid position 91 to be replaced by a glutamine (Q). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Nemaline myopathy 6

Uncertain:1

Dec 23, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change replaces proline, which is neutral and non-polar, with glutamine, which is neutral and polar, at codon 91 of the KBTBD13 protein (p.Pro91Gln). The frequency data for this variant in the population databases is considered unreliable, as metrics indicate poor data quality at this position in the gnomAD database. This variant has not been reported in the literature in individuals affected with KBTBD13-related conditions. ClinVar contains an entry for this variant (Variation ID: 577515). Invitae Evidence Modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) indicates that this missense variant is not expected to disrupt KBTBD13 protein function with a negative predictive value of 80%. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.15

BayesDel_addAF

Benign

-0.14

BayesDel_noAF

Benign

-0.44

CADD

Benign

(source)

DANN

Benign

0.84

DEOGEN2

Benign

0.11

Eigen

Benign

-0.49

Eigen_PC

Benign

-0.38

FATHMM_MKL

Benign

0.21

LIST_S2

Benign

0.67

M_CAP

Uncertain

0.21

MetaRNN

Benign

0.11

MetaSVM

Benign

-1.0

MutationAssessor

Benign

1.1

PhyloP100

2.2

PrimateAI

Uncertain

0.77

PROVEAN

Benign

-0.66

REVEL

Benign

0.030

Sift

Benign

0.38

Sift4G

Benign

0.54

Polyphen

0.11

Vest4

0.20

MutPred

0.37

Gain of helix (P = 0.0128);

MVP

0.32

MPC

0.72

ClinPred

0.027

GERP RS

3.5

PromoterAI

0.085

Neutral

(source)

Varity_R

0.10

gMVP

0.33

Mutation Taster

=88/12

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

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15-65077087-C-A

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over