rs747274892

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_144508.5(KNL1):​c.-13G>A variant causes a 5 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000706 in 1,415,610 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.

Frequency

Genomes: not found (cov: 32)
Exomes 𝑓: 7.1e-7 ( 0 hom. )

Consequence

KNL1
NM_144508.5 5_prime_UTR

Scores

2

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 0.169

Publications

0 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

Genome browser will be placed here

ACMG classification

Classification was made for transcript

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

PM2
Very rare variant in population databases, with high coverage;
BP4
Computational evidence support a benign effect (BayesDel_noAF=-0.8).

Transcripts

RefSeq

Gene Transcript HGVSc HGVSp Effect Exon rank MANE Protein UniProt
KNL1NM_144508.5 linkc.-13G>A 5_prime_UTR_variant Exon 2 of 26 ENST00000399668.7 NP_653091.3 Q8NG31-2
KNL1NM_170589.5 linkc.-13G>A 5_prime_UTR_variant Exon 2 of 27 NP_733468.3 Q8NG31-1

Ensembl

Gene Transcript HGVSc HGVSp Effect Exon rank TSL MANE Protein Appris UniProt
KNL1ENST00000399668.7 linkc.-13G>A 5_prime_UTR_variant Exon 2 of 26 1 NM_144508.5 ENSP00000382576.3 Q8NG31-2

Frequencies

GnomAD3 genomes
Cov.:
32
GnomAD4 exome
AF:
7.06e-7
AC:
1
AN:
1415610
Hom.:
0
Cov.:
24
AF XY:
0.00
AC XY:
0
AN XY:
706646
show subpopulations
African (AFR)
AF:
0.00
AC:
0
AN:
32110
American (AMR)
AF:
0.00
AC:
0
AN:
42738
Ashkenazi Jewish (ASJ)
AF:
0.00
AC:
0
AN:
25632
East Asian (EAS)
AF:
0.00
AC:
0
AN:
39342
South Asian (SAS)
AF:
0.0000120
AC:
1
AN:
83146
European-Finnish (FIN)
AF:
0.00
AC:
0
AN:
52866
Middle Eastern (MID)
AF:
0.00
AC:
0
AN:
5604
European-Non Finnish (NFE)
AF:
0.00
AC:
0
AN:
1075380
Other (OTH)
AF:
0.00
AC:
0
AN:
58792
Allele Balance Distribution
Red line indicates average allele balance
Average allele balance: 0.525
Heterozygous variant carriers
0
0
1
1
2
2
0.00
0.20
0.40
0.60
0.80
0.95
Allele balance

Age Distribution

Exome Het
Variant carriers
0
2
4
6
8
10
<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.:
32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name
Calibrated prediction
Score
Prediction
BayesDel_noAF
Benign
-0.80
CADD
Benign
7.8
DANN
Benign
0.74
PhyloP100
0.17

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

Other links and lift over

dbSNP: rs747274892; hg19: chr15-40895117; API