chr15-40383293-C-T

Position:

chr15-40383293-C-T

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_033286.4(KNSTRN):c.275C>T(p.Pro92Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000118 in 1,613,392 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/21 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. P92S) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.000066 ( 0 hom., cov: 33)

Exomes 𝑓: 0.0000062 ( 0 hom. )

Consequence

KNSTRN
NM_033286.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.268

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:

KNSTRN (HGNC:):

KNSTRN links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.0613752).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
KNSTRN	NM_033286.4 linkuse as main transcript	c.275C>T	p.Pro92Leu	missense_variant	2/9	ENST00000249776.13	NP_150628.3	Q9Y448-1
KNSTRN	NM_001142761.1 linkuse as main transcript	c.275C>T	p.Pro92Leu	missense_variant	2/9		NP_001136233.1	Q9Y448-2
KNSTRN	NM_001142762.1 linkuse as main transcript	c.275C>T	p.Pro92Leu	missense_variant	2/8		NP_001136234.1	Q9Y448-3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
KNSTRN	ENST00000249776.13 linkuse as main transcript	c.275C>T	p.Pro92Leu	missense_variant	2/9	1	NM_033286.4	ENSP00000249776.8		Q9Y448-1

Frequencies

GnomAD3 genomes

AF:

0.0000657

AC:

AN:

152252

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000217

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:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000162

AC:

AN:

247652

Hom.:

AF XY:

0.0000149

AC XY:

AN XY:

134522

show subpopulations

Gnomad AFR exome

AF:

0.000130

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000327

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000895

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000616

AC:

AN:

1461140

Hom.:

Cov.:

AF XY:

0.00000688

AC XY:

AN XY:

726800

show subpopulations

Gnomad4 AFR exome

AF:

0.000149

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000116

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000270

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000657

AC:

AN:

152252

Hom.:

Cov.:

AF XY:

0.0000538

AC XY:

AN XY:

74384

show subpopulations

Gnomad4 AFR

AF:

0.000217

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000604

ESP6500AA

AF:

0.000512

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.0000248

AC:

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

Sep 03, 2024

The c.275C>T (p.P92L) alteration is located in exon 2 (coding exon 2) of the KNSTRN gene. This alteration results from a C to T substitution at nucleotide position 275, causing the proline (P) at amino acid position 92 to be replaced by a leucine (L). 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

0.084

BayesDel_addAF

Benign

-0.34

BayesDel_noAF

Benign

-0.49

CADD

Benign

DANN

Benign

0.93

DEOGEN2

Benign

0.039

.;T;.;T

Eigen

Benign

-0.94

Eigen_PC

Benign

-0.97

FATHMM_MKL

Benign

0.016

LIST_S2

Benign

0.78

T;T;T;T

M_CAP

Benign

0.0076

MetaRNN

Benign

0.061

T;T;T;T

MetaSVM

Benign

-0.96

MutationAssessor

Benign

1.6

L;L;L;.

PrimateAI

Benign

0.28

PROVEAN

Pathogenic

-4.9

D;D;D;.

REVEL

Benign

0.049

Sift

Benign

0.085

T;T;T;.

Sift4G

Benign

0.13

T;T;T;T

Polyphen

0.18

B;B;B;.

Vest4

0.12

MVP

0.072

MPC

0.24

ClinPred

0.18

GERP RS

0.55

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.0

Varity_R

0.049

gMVP

0.047

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over