Variant 15-40386380-C-T details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_033286.4(KNSTRN):c.323C>T(p.Thr108Ile) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000479 in 1,461,828 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 Uncertain significance (★).

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 0.0000048 ( 0 hom. )

Consequence

KNSTRN
NM_033286.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.396

Variant links:

Genes affected

KNSTRN (HGNC:30767): (kinetochore localized astrin (SPAG5) binding protein) Enables microtubule plus-end binding activity and protein homodimerization activity. Involved in several processes, including cellular response to epidermal growth factor stimulus; mitotic sister chromatid segregation; and regulation of attachment of spindle microtubules to kinetochore. Located in several cellular components, including kinetochore; microtubule cytoskeleton; and ruffle. Implicated in actinic keratosis and skin squamous cell carcinoma. [provided by Alliance of Genome Resources, Apr 2022]

KNSTRN links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.16717952).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein
KNSTRN	NM_033286.4 linkuse as main transcript	c.323C>T	p.Thr108Ile	missense_variant	3/9	ENST00000249776.13	NP_150628.3
KNSTRN	NM_001142761.1 linkuse as main transcript	c.323C>T	p.Thr108Ile	missense_variant	3/9		NP_001136233.1
KNSTRN	NM_001142762.1 linkuse as main transcript	c.323C>T	p.Thr108Ile	missense_variant	3/8		NP_001136234.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
KNSTRN	ENST00000249776.13 linkuse as main transcript	c.323C>T	p.Thr108Ile	missense_variant	3/9	1	NM_033286.4	ENSP00000249776	P1	Q9Y448-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.00000479

AC:

AN:

1461828

Hom.:

Cov.:

AF XY:

0.00000413

AC XY:

AN XY:

727210

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000630

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Feb 16, 2023

The c.323C>T (p.T108I) alteration is located in exon 3 (coding exon 3) of the KNSTRN gene. This alteration results from a C to T substitution at nucleotide position 323, causing the threonine (T) at amino acid position 108 to be replaced by an isoleucine (I). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.15

BayesDel_addAF

Benign

-0.12

BayesDel_noAF

Benign

-0.41

CADD

Benign

DANN

Uncertain

1.0

DEOGEN2

Benign

0.046

.;T;.;T

Eigen

Benign

0.15

Eigen_PC

Benign

0.083

FATHMM_MKL

Benign

0.35

LIST_S2

Benign

0.79

T;T;T;T

M_CAP

Benign

0.0059

MetaRNN

Benign

0.17

T;T;T;T

MetaSVM

Benign

-1.1

MutationAssessor

Benign

1.8

L;L;L;.

MutationTaster

Benign

1.0

N;N;N

PrimateAI

Benign

0.43

PROVEAN

Uncertain

-3.2

D;D;D;.

REVEL

Benign

0.083

Sift

Pathogenic

0.0

D;D;D;.

Sift4G

Uncertain

0.0070

D;D;D;D

Polyphen

1.0

D;D;D;.

Vest4

0.15

MutPred

0.24

Loss of phosphorylation at T108 (P = 0.0186);Loss of phosphorylation at T108 (P = 0.0186);Loss of phosphorylation at T108 (P = 0.0186);.;

MVP

0.30

MPC

0.20

ClinPred

0.95

GERP RS

2.4

Varity_R

0.16

gMVP

0.16

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.10

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

No publications associated with this variant yet.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over