chr15-65077146-G-A

Position:

• chr15-65077146-G-A

Variant summary

Our verdict is Benign. Variant got -11 ACMG points: 0P and 11B. BP4_Moderate BP6 BS1 BS2

The NM_001101362.3(KBTBD13):​c.331G>A​(p.Asp111Asn) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000352 in 1,514,662 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

• Frequency:
  • Genomes: 𝑓 0.00012 (0 hom., cov: 34)
  • Exomes 𝑓: 0.00038 (0 hom.)
• Consequence: KBTBD13 NM_001101362.3 missense
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2 B:1 O:1
• Conservation: PhyloP100: 2.44

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]

ACMG classification

Verdict is Benign. Variant got -11 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.11637229).
• BP6: Variant 15-65077146-G-A is Benign according to our data. Variant chr15-65077146-G-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 316738.We mark this variant Likely_benign, oryginal submissions are: {Benign=1, Uncertain_significance=2, not_provided=1}.
• BS1: Variant frequency is greater than expected in population nfe. gnomad4_exome allele frequency = 0.000378 (515/1362716) while in subpopulation NFE AF= 0.000459 (490/1068654). AF 95% confidence interval is 0.000425. There are 0 homozygotes in gnomad4_exome. There are 260 alleles in male gnomad4_exome subpopulation. Median coverage is 57. This position pass quality control queck.
• BS2: High AC in GnomAd4 at 18 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
KBTBD13	NM_001101362.3	c.331G>A	p.Asp111Asn	missense_variant	1/1	ENST00000432196.5	NP_001094832.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
KBTBD13	ENST00000432196.5	c.331G>A	p.Asp111Asn	missense_variant	1/1		NM_001101362.3	ENSP00000388723	P1

Frequencies

GnomAD3 genomes AF: 0.000118 AC: 18 AN: 151946 Hom.: 0 Cov.: 34

Gnomad AFR AF: 0.0000725

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000131

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.000379

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.000132

Gnomad OTH AF: 0.00

GnomAD3 exomes AF: 0.0000793 AC: 9 AN: 113446 Hom.: 0 AF XY: 0.0000795 AC XY: 5 AN XY: 62902

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 SAS exome AF: 0.0000498

Gnomad FIN exome AF: 0.000171

Gnomad NFE exome AF: 0.000163

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.000378 AC: 515 AN: 1362716 Hom.: 0 Cov.: 57 AF XY: 0.000387 AC XY: 260 AN XY: 672332

Gnomad4 AFR exome AF: 0.000105

Gnomad4 AMR exome AF: 0.0000298

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000260

Gnomad4 FIN exome AF: 0.000261

Gnomad4 NFE exome AF: 0.000459

Gnomad4 OTH exome AF: 0.000176

GnomAD4 genome AF: 0.000118 AC: 18 AN: 151946 Hom.: 0 Cov.: 34 AF XY: 0.000135 AC XY: 10 AN XY: 74248

Gnomad4 AFR AF: 0.0000725

Gnomad4 AMR AF: 0.000131

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.000379

Gnomad4 NFE AF: 0.000132

Gnomad4 OTH AF: 0.00

Alfa AF: 0.000146 Hom.: 0

Bravo AF: 0.000144

Asia WGS AF: 0.000291 AC: 1 AN: 3446

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:2 Benign:1 Other:1

Revision: criteria provided, conflicting classifications

Submissions by phenotype

Nemaline myopathy 6 Uncertain:1 Benign:1 Other:1

Benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jan 22, 2024	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Illumina Laboratory Services, Illumina	Jan 13, 2018	This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. -
not provided, no classification provided	phenotyping only	GenomeConnect, ClinGen	-	Variant classified as Uncertain significance and reported on 09-15-2021 by Lab or GTR ID 506526. GenomeConnect assertions are reported exactly as they appear on the patient-provided report from the testing laboratory. GenomeConnect staff make no attempt to reinterpret the clinical significance of the variant. -

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

GeneDx

May 18, 2017

A variant of uncertain significance has been identified in the KBTBD13 gene. The D111N variant has not been published as a pathogenic variant, nor has it been reported as a benign variant to our knowledge. The D111N variant is observed in 15/69584 (0.02%) in individuals undergoing testing at GeneDx (Lek et al., 2016; 1000 Genomes Consortium et al., 2015; Exome Variant Server). The D111N variant is a semi-conservative amino acid substitution, which may impact secondary protein structure as these residues differ in some properties. However, this substitution occurs at a position that is not conserved. In silico analysis is inconsistent in its predictions as to whether or not the variant is damaging to the protein structure/function. Therefore, based on the currently available information, it is unclear whether this variant is a pathogenic variant or a rare benign variant. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.14
BayesDel_addAF	Benign	-0.30	T
BayesDel_noAF	Benign	-0.36
CADD	Uncertain	24
DANN	Benign	0.93
DEOGEN2	Benign	0.0079	T
Eigen	Benign	-0.39
Eigen_PC	Benign	-0.30
FATHMM_MKL	Uncertain	0.77	D
LIST_S2	Benign	0.86	D
M_CAP	Uncertain	0.19	D
MetaRNN	Benign	0.12	T
MetaSVM	Benign	-0.74	T
MutationAssessor	Benign	1.5	L
MutationTaster	Benign	0.80	N
PrimateAI	Uncertain	0.65	T
PROVEAN	Benign	0.070	N
REVEL	Benign	0.19
Sift	Benign	0.39	T
Sift4G	Benign	0.19	T
Polyphen		0.071	B
Vest4		0.27
MutPred		0.59		Gain of helix (P = 0.062);
MVP		0.62
MPC		0.61
ClinPred		0.068	T
GERP RS		3.5
Varity_R		0.062
gMVP		0.26

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

LitVar

Other links and lift over

dbSNP: rs567309902; hg19: chr15-65369484;