15-40170552-A-C

Variant names:

• chr15-40170552-A-C
• rs140273483
• NM_001211.6:c.255A>C

Variant summary

Our verdict is Likely benign. The variant received -5 ACMG points: 2P and 7B. PM2 BP4_Strong BP6_Moderate BP7

The NM_001211.6(BUB1B):​c.255A>C​(p.Thr85Thr) variant causes a synonymous 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. Variant has been reported in ClinVar as Likely benign (★). Synonymous variant affecting the same amino acid position (i.e. T85T) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: BUB1B NM_001211.6 synonymous
• Clinical Significance: Likely benign criteria provided, single submitter B:1
• Conservation: PhyloP100: 1.15
• Publications: 0 publications found

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

ACMG classification

Our verdict: Likely_benign. The variant received -5 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.51).
• BP6: Variant 15-40170552-A-C is Benign according to our data. Variant chr15-40170552-A-C is described in ClinVar as Likely_benign. ClinVar VariationId is 2565454.Status of the report is criteria_provided_single_submitter, 1 stars.
• BP7: Synonymous conserved (PhyloP=1.15 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001211.6. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	BUB1B	NM_001211.6	MANE Select	c.255A>C	p.Thr85Thr	synonymous	Exon 4 of 23	NP_001202.5

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	BUB1B	ENST00000287598.11	TSL:1 MANE Select	c.255A>C	p.Thr85Thr	synonymous	Exon 4 of 23	ENSP00000287598.7
	BUB1B	ENST00000412359.7	TSL:2	c.297A>C	p.Thr99Thr	synonymous	Exon 4 of 23	ENSP00000398470.3
	BUB1B	ENST00000558715.5	TSL:3	n.*88A>C		non_coding_transcript_exon	Exon 5 of 5	ENSP00000453861.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

ClinVar submissions as Germline

Significance: Likely benign

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	-	1	Inborn genetic diseases (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.51
CADD	Benign	9.8
DANN	Benign	0.77
PhyloP100		1.2
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.030		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs140273483; hg19: chr15-40462753;