Genetic Variant BUB1B:p.Cys356Gly (chr15-40196552-T-G) – ACMG Classification: Uncertain_significance (3 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 3 ACMG points: 3P and 0B. PM5PP3

The NM_001211.6(BUB1B):c.1066T>G(p.Cys356Gly) variant causes a missense change. The variant allele was found at a frequency of 0.0000103 in 1,461,180 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. C356Y) has been classified as Likely pathogenic.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.000010 ( 0 hom. )

Consequence

BUB1B
NM_001211.6 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 6.18

Publications

0 publications found

Variant links:

Genes affected

BUB1B (HGNC:1149): (BUB1 mitotic checkpoint serine/threonine kinase B) This gene encodes a kinase involved in spindle checkpoint function. The protein has been localized to the kinetochore and plays a role in the inhibition of the anaphase-promoting complex/cyclosome (APC/C), delaying the onset of anaphase and ensuring proper chromosome segregation. Impaired spindle checkpoint function has been found in many forms of cancer. [provided by RefSeq, Jul 2008]

BUB1B Gene-Disease associations (from GenCC):

mosaic variegated aneuploidy syndrome 1
Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), Genomics England PanelApp, ClinGen, G2P
rhabdomyosarcoma
Inheritance: AR Classification: MODERATE Submitted by: Genomics England PanelApp
mosaic variegated aneuploidy syndrome
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

BUB1B links:

LOC107984763 (HGNC:):

LOC107984763 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 3 ACMG points.

PM5

Other missense variant is known to change same aminoacid residue: Variant chr15-40196553-G-A is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 2445378.

PP3

MetaRNN computational evidence supports a deleterious effect, 0.768

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
BUB1B	NM_001211.6 link	c.1066T>G	p.Cys356Gly	missense_variant	Exon 9 of 23	ENST00000287598.11	NP_001202.5	O60566-1
LOC107984763	XR_001751506.2 link	n.218-16351A>C		intron_variant	Intron 1 of 2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
BUB1B	ENST00000287598.11 link	c.1066T>G	p.Cys356Gly	missense_variant	Exon 9 of 23	1	NM_001211.6	ENSP00000287598.7		O60566-1
BUB1B	ENST00000412359.7 link	c.1108T>G	p.Cys370Gly	missense_variant	Exon 9 of 23	2		ENSP00000398470.3		O60566-3

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.0000103

AC:

AN:

1461180

Hom.:

Cov.:

AF XY:

0.0000124

AC XY:

AN XY:

726878

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33450

American (AMR)

AF:

0.00

AC:

AN:

44712

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26118

East Asian (EAS)

AF:

0.00

AC:

AN:

39686

South Asian (SAS)

AF:

0.00

AC:

AN:

86190

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53412

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5766

European-Non Finnish (NFE)

AF:

0.0000126

AC:

AN:

1111480

Other (OTH)

AF:

0.0000166

AC:

AN:

60366

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.425

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

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Mosaic variegated aneuploidy syndrome 1

Uncertain:1

May 05, 2025

Molecular Pathology, Peter Maccallum Cancer Centre

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

Benign

0.27

BayesDel_addAF

Uncertain

0.075

BayesDel_noAF

Benign

-0.13

CADD

Pathogenic

(source)

DANN

Benign

0.96

DEOGEN2

Uncertain

0.43

T;.

Eigen

Uncertain

0.66

Eigen_PC

Uncertain

0.64

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Uncertain

0.88

D;D

M_CAP

Benign

0.026

MetaRNN

Pathogenic

0.77

D;D

MetaSVM

Benign

-1.1

MutationAssessor

Uncertain

2.3

M;.

PhyloP100

6.2

PrimateAI

Uncertain

0.65

PROVEAN

Pathogenic

-5.0

D;D

REVEL

Uncertain

0.37

Sift

Uncertain

0.0030

D;D

Sift4G

Benign

0.17

T;T

Polyphen

1.0

D;D

Vest4

0.73

MutPred

0.55

Loss of catalytic residue at P355 (P = 0.0175);.;

MVP

0.68

MPC

0.66

ClinPred

0.99

GERP RS

5.4

Varity_R

0.70

gMVP

0.41

Mutation Taster

=83/17

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.020

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

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over