15-40218515-G-T

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_001211.6(BUB1B):c.2910G>T(p.Gln970His) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign 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. Q970P) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: BUB1B NM_001211.6 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.33

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-PAK6 (HGNC:):

PAK6 (HGNC:16061): (p21 (RAC1) activated kinase 6) This gene encodes a member of a family of p21-stimulated serine/threonine protein kinases, which contain an amino-terminal Cdc42/Rac interactive binding (CRIB) domain and a carboxyl-terminal kinase domain. These kinases function in a number of cellular processes, including cytoskeleton rearrangement, apoptosis, and the mitogen-activated protein (MAP) kinase signaling pathway. The protein encoded by this gene interacts with androgen receptor (AR) and translocates to the nucleus, where it is involved in transcriptional regulation. Changes in expression of this gene have been linked to prostate cancer. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Dec 2015]

ACMG classification

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=0.1920873).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
BUB1B	NM_001211.6	c.2910G>T	p.Gln970His	missense_variant	22/23	ENST00000287598.11
BUB1B-PAK6	NM_001128628.3	c.-201+848G>T		intron_variant
LOC107984763	XR_001751506.2	n.217+20970C>A		intron_variant, non_coding_transcript_variant
BUB1B-PAK6	NM_001128629.3	c.-118+848G>T		intron_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
BUB1B	ENST00000287598.11	c.2910G>T	p.Gln970His	missense_variant	22/23	1	NM_001211.6	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

Bravo AF: 0.00000756

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Inborn genetic diseases Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jul 27, 2021

The p.Q970H variant (also known as c.2910G>T), located in coding exon 22 of the BUB1B gene, results from a G to T substitution at nucleotide position 2910. The glutamine at codon 970 is replaced by histidine, an amino acid with highly similar properties. This amino acid position is conserved. In addition, this alteration is predicted to be tolerated by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.18
BayesDel_addAF	Benign	-0.16	T
BayesDel_noAF	Benign	-0.47
Cadd	Benign	19
Dann	Uncertain	0.99
DEOGEN2	Benign	0.35	T;.
Eigen	Benign	-0.21
Eigen_PC	Benign	-0.029
FATHMM_MKL	Benign	0.74	D
LIST_S2	Benign	0.64	T;T
M_CAP	Benign	0.0061	T
MetaRNN	Benign	0.19	T;T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	1.4	L;.
MutationTaster	Benign	1.0	D;D;D;D
PrimateAI	Benign	0.45	T
PROVEAN	Benign	-2.3	N;N
REVEL	Benign	0.093
Sift	Benign	0.15	T;T
Sift4G	Benign	0.11	T;T
Polyphen		0.061	B;.
Vest4		0.20
MutPred		0.52		Loss of catalytic residue at Q970 (P = 0.106);.;
MVP		0.80
MPC		0.21
ClinPred		0.47	T
GERP RS		3.9
Varity_R		0.12
gMVP		0.39

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

LitVar

Other links and lift over

dbSNP: rs1263577809; hg19: chr15-40510716;