Genetic Variant KAZN:p.Arg705Gly (chr1-15112491-C-G) – ACMG Classification: Uncertain_significance (1 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 2P and 1B. PM2BP4

The NM_201628.3(KAZN):c.2113C>G(p.Arg705Gly) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000686 in 1,456,924 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/22 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R705W) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 6.9e-7 ( 0 hom. )

Consequence

KAZN
NM_201628.3 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 0.991

Publications

0 publications found

Variant links:

Genes affected

KAZN (HGNC:29173): (kazrin, periplakin interacting protein) This gene encodes a protein that plays a role in desmosome assembly, cell adhesion, cytoskeletal organization, and epidermal differentiation. This protein co-localizes with desmoplakin and the cytolinker protein periplakin. In general, this protein localizes to the nucleus, desmosomes, cell membrane, and cortical actin-based structures. Some isoforms of this protein also associate with microtubules. Alternative splicing results in multiple transcript variants encoding distinct isoforms. Additional splice variants have been described but their biological validity has not been verified. [provided by RefSeq, Aug 2011]

KAZN links:

TMEM51-AS1 (HGNC:26301): (TMEM51 antisense RNA 1)

TMEM51-AS1 links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.26708955).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_201628.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	KAZN	NM_201628.3	MANE Select	c.2113C>G	p.Arg705Gly	missense	Exon 14 of 15	NP_963922.2	Q674X7-1
	TMEM51-AS1	NR_027136.1		n.6303G>C		non_coding_transcript_exon	Exon 5 of 5

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
KAZN	ENST00000376030.7	TSL:5 MANE Select	c.2113C>G	p.Arg705Gly	missense	Exon 14 of 15	ENSP00000365198.2	Q674X7-1
TMEM51-AS1	ENST00000404665.4	TSL:1	n.6297G>C		non_coding_transcript_exon	Exon 5 of 5
KAZN	ENST00000636203.1	TSL:5	c.2377C>G	p.Arg793Gly	missense	Exon 16 of 17	ENSP00000490958.1	A0A1B0GWK2

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.86e-7

AC:

AN:

1456924

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

724118

show subpopulations

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR)

AF:

0.00

AC:

AN:

33434

American (AMR)

AF:

0.00

AC:

AN:

44074

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25958

East Asian (EAS)

AF:

0.0000253

AC:

AN:

39548

South Asian (SAS)

AF:

0.00

AC:

AN:

84678

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53148

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5762

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1110122

Other (OTH)

AF:

0.00

AC:

AN:

60200

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.375

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 v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.15

BayesDel_addAF

Benign

-0.0048

BayesDel_noAF

Benign

-0.24

CADD

Benign

(source)

DANN

Uncertain

0.99

DEOGEN2

Benign

0.0075

Eigen

Benign

0.099

Eigen_PC

Benign

0.089

FATHMM_MKL

Benign

0.36

LIST_S2

Benign

0.81

M_CAP

Benign

0.016

MetaRNN

Benign

0.27

MetaSVM

Benign

-1.1

MutationAssessor

Benign

1.9

PhyloP100

0.99

PrimateAI

Uncertain

0.60

PROVEAN

Benign

-0.18

REVEL

Benign

0.20

Sift

Benign

0.032

Sift4G

Benign

0.77

Polyphen

0.99

Vest4

0.73

MutPred

0.30

Loss of MoRF binding (P = 0.0115)

MVP

0.30

MPC

0.50

ClinPred

0.93

GERP RS

3.6

Varity_R

0.10

gMVP

0.54

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over