NM_144508.5:c.89C>T

Variant names:

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 0P and 2B. BP4_Moderate

The NM_144508.5(KNL1):c.89C>T(p.Pro30Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000157 in 1,578,184 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00014 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00016 ( 0 hom. )

Consequence

KNL1
NM_144508.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 3.33

Publications

4 publications found

Variant links:

Genes affected

KNL1 (HGNC:24054): (kinetochore scaffold 1) The protein encoded by this gene is a component of the multiprotein assembly that is required for creation of kinetochore-microtubule attachments and chromosome segregation. The encoded protein functions as a scaffold for proteins that influence the spindle assembly checkpoint during the eukaryotic cell cycle and it interacts with at least five different kinetochore proteins and two checkpoint kinases. In adults, this gene is predominantly expressed in normal testes, various cancer cell lines and primary tumors from other tissues and is ubiquitously expressed in fetal tissues. This gene was originally identified as a fusion partner with the mixed-lineage leukemia (MLL) gene in t(11;15)(q23;q14). Mutations in this gene cause autosomal recessive primary microcephaly-4 (MCPH4). Alternative splicing results in multiple transcript variants encoding different isoforms. Additional splice variants have been described but their biological validity has not been confirmed. [provided by RefSeq, Jan 2013]

KNL1 Gene-Disease associations (from GenCC):

microcephaly 4, primary, autosomal recessive
Inheritance: AR Classification: STRONG, MODERATE Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae)
autosomal recessive primary microcephaly
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

KNL1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -2 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.25432277).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
KNL1	NM_144508.5 link	c.89C>T	p.Pro30Leu	missense_variant	Exon 4 of 26	ENST00000399668.7	NP_653091.3	Q8NG31-2
KNL1	NM_170589.5 link	c.89C>T	p.Pro30Leu	missense_variant	Exon 4 of 27		NP_733468.3	Q8NG31-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
KNL1	ENST00000399668.7 link	c.89C>T	p.Pro30Leu	missense_variant	Exon 4 of 26	1	NM_144508.5	ENSP00000382576.3		Q8NG31-2

Frequencies

GnomAD3 genomes

AF:

0.000138

AC:

AN:

152060

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000242

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000656

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:

0.000250

Gnomad OTH

AF:

0.000958

GnomAD2 exomes

AF:

0.000152

AC:

AN:

249248

AF XY:

0.000192

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000290

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000301

Gnomad OTH exome

AF:

0.000165

GnomAD4 exome

AF:

0.000158

AC:

226

AN:

1426006

Hom.:

Cov.:

AF XY:

0.000193

AC XY:

137

AN XY:

711106

show subpopulations

African (AFR)

AF:

0.0000304

AC:

AN:

32864

American (AMR)

AF:

0.0000448

AC:

AN:

44630

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25746

East Asian (EAS)

AF:

0.00

AC:

AN:

39530

South Asian (SAS)

AF:

0.0000704

AC:

AN:

85208

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53202

Middle Eastern (MID)

AF:

0.000718

AC:

AN:

5572

European-Non Finnish (NFE)

AF:

0.000187

AC:

202

AN:

1080126

Other (OTH)

AF:

0.000186

AC:

AN:

59128

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.432

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.000138

AC:

AN:

152178

Hom.:

Cov.:

AF XY:

0.000148

AC XY:

AN XY:

74386

show subpopulations

African (AFR)

AF:

0.0000241

AC:

AN:

41516

American (AMR)

AF:

0.0000655

AC:

AN:

15272

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5190

South Asian (SAS)

AF:

0.00

AC:

AN:

4822

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10592

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000250

AC:

AN:

67998

Other (OTH)

AF:

0.000948

AC:

AN:

2110

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.527

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.000265

Hom.:

Bravo

AF:

0.000147

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000370

AC:

ExAC

AF:

0.000190

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not provided

Uncertain:1

Dec 03, 2013

Genetic Services Laboratory, University of Chicago

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.72

BayesDel_addAF

Benign

-0.26

BayesDel_noAF

Benign

-0.32

CADD

Pathogenic

(source)

DANN

Uncertain

0.99

DEOGEN2

Benign

0.30

T;T;.

Eigen

Uncertain

0.58

Eigen_PC

Uncertain

0.53

FATHMM_MKL

Uncertain

0.91

LIST_S2

Benign

0.84

T;T;T

M_CAP

Benign

0.017

MetaRNN

Benign

0.25

T;T;T

MetaSVM

Benign

-0.99

PhyloP100

3.3

PrimateAI

Uncertain

0.63

PROVEAN

Pathogenic

-5.2

D;D;D

REVEL

Benign

0.18

Sift

Pathogenic

0.0

D;D;D

Sift4G

Pathogenic

0.0

D;D;D

Polyphen

1.0

D;.;D

Vest4

0.50

MVP

0.67

MPC

0.28

ClinPred

0.73

GERP RS

4.5

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.0

Varity_R

0.65

gMVP

0.48

Mutation Taster

=50/50

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

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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NM_144508.5:c.89C>T

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over