Genetic Variant NM_001282684.2:c.897C>G (chr22-37062546-C-G) – ACMG Classification: Likely_benign (-1 pts)

Variant summary

Our verdict is Likely benign. The variant received -1 ACMG points: 2P and 3B. PM2BP4_ModerateBP7

The NM_001282684.2(KCTD17):c.897C>G(p.Pro299Pro) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,182 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. Synonymous variant affecting the same amino acid position (i.e. P299P) has been classified as Benign.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

KCTD17
NM_001282684.2 synonymous

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 0.716

Publications

0 publications found

Variant links:

Genes affected

KCTD17 (HGNC:25705): (potassium channel tetramerization domain containing 17) This gene encodes a protein that belongs to a conserved family of potassium channel tetramerization domain (KCTD)-containing proteins. The encoded protein functions in ciliogenesis by acting as a substrate adaptor for the cullin3-based ubiquitin-conjugating enzyme E3 ligase, and targets trichoplein, a keratin-binding protein, for degradation via polyubiquitinylation. A mutation in this gene is associated with autosomal dominant myoclonic dystonia 26. [provided by RefSeq, Nov 2016]

KCTD17 Gene-Disease associations (from GenCC):

myoclonic dystonia 26
Inheritance: AD Classification: STRONG, LIMITED Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae)
myoclonus-dystonia syndrome
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

KCTD17 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.17979911).

BP7

Synonymous conserved (PhyloP=0.716 with no splicing effect.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
KCTD17	NM_001282684.2 link	c.897C>G	p.Pro299Pro	synonymous_variant	Exon 9 of 9	ENST00000403888.8	NP_001269613.2	Q8N5Z5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
KCTD17	ENST00000403888.8 link	c.897C>G	p.Pro299Pro	synonymous_variant	Exon 9 of 9	1	NM_001282684.2	ENSP00000385096.4	Q8N5Z5
KCTD17	ENST00000402077.8 link	c.825C>G	p.Pro275Pro	synonymous_variant	Exon 8 of 8	1		ENSP00000384391.4	Q8N5Z5
KCTD17	ENST00000610767.5 link	c.634C>G	p.Arg212Gly	missense_variant	Exon 6 of 6	3		ENSP00000480699.2	A0A087WX35
KCTD17	ENST00000456470.1 link	c.*68C>G		3_prime_UTR_variant	Exon 7 of 7	3		ENSP00000409638.1	H0Y731

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.84e-7

AC:

AN:

1461182

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

726876

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33470

American (AMR)

AF:

0.00

AC:

AN:

44690

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26120

East Asian (EAS)

AF:

0.00

AC:

AN:

39694

South Asian (SAS)

AF:

0.00

AC:

AN:

86200

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53380

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5606

European-Non Finnish (NFE)

AF:

9.00e-7

AC:

AN:

1111702

Other (OTH)

AF:

0.00

AC:

AN:

60320

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

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

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.48

BayesDel_addAF

Benign

-0.068

BayesDel_noAF

Benign

-0.34

CADD

Benign

7.8

(source)

DANN

Benign

0.82

DEOGEN2

Benign

0.10

FATHMM_MKL

Benign

0.65

LIST_S2

Benign

0.50

MetaRNN

Benign

0.18

PhyloP100

0.72

Sift4G

Uncertain

0.0050

Vest4

0.37

MVP

0.58

GERP RS

1.5

Mutation Taster

=100/0

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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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over