15-59116696-C-A

Position:

• chr15-59116696-C-A

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The NM_004701.4(CCNB2):​c.604C>A​(p.Pro202Thr) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 12/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: CCNB2 NM_004701.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 3.75

Genes affected

CCNB2 (HGNC:1580): (cyclin B2) Cyclin B2 is a member of the cyclin family, specifically the B-type cyclins. The B-type cyclins, B1 and B2, associate with p34cdc2 and are essential components of the cell cycle regulatory machinery. B1 and B2 differ in their subcellular localization. Cyclin B1 co-localizes with microtubules, whereas cyclin B2 is primarily associated with the Golgi region. Cyclin B2 also binds to transforming growth factor beta RII and thus cyclin B2/cdc2 may play a key role in transforming growth factor beta-mediated cell cycle control. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.32591856).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CCNB2	NM_004701.4	c.604C>A	p.Pro202Thr	missense_variant	6/9	ENST00000288207.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CCNB2	ENST00000288207.7	c.604C>A	p.Pro202Thr	missense_variant	6/9	1	NM_004701.4	P1
CCNB2	ENST00000621385.1	c.604C>A	p.Pro202Thr	missense_variant	6/8	1
CCNB2	ENST00000559622.5	c.361C>A	p.Pro121Thr	missense_variant	4/6	5

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Apr 13, 2022

The c.604C>A (p.P202T) alteration is located in exon 6 (coding exon 6) of the CCNB2 gene. This alteration results from a C to A substitution at nucleotide position 604, causing the proline (P) at amino acid position 202 to be replaced by a threonine (T). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.089
BayesDel_addAF	Benign	-0.14	T
BayesDel_noAF	Benign	-0.44
CADD	Benign	23
DANN	Benign	0.90
DEOGEN2	Benign	0.20	T;T;.
Eigen	Benign	-0.35
Eigen_PC	Benign	-0.18
FATHMM_MKL	Uncertain	0.94	D
LIST_S2	Uncertain	0.89	D;D;D
M_CAP	Benign	0.014	T
MetaRNN	Benign	0.33	T;T;T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	1.1	L;.;.
MutationTaster	Benign	1.0	D;D
PrimateAI	Uncertain	0.54	T
PROVEAN	Pathogenic	-4.5	D;D;.
REVEL	Benign	0.11
Sift	Benign	0.17	T;T;.
Sift4G	Benign	0.58	T;T;T
Polyphen		0.0010	B;.;.
Vest4		0.52
MutPred		0.26		Gain of MoRF binding (P = 0.0443);.;Gain of MoRF binding (P = 0.0443);
MVP		0.61
MPC		0.19
ClinPred		0.55	D
GERP RS		4.4
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.25
gMVP		0.32

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.040		Details are displayed if max score is > 0.2

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

Publications

No publications associated with this variant yet.

Other links and lift over

hg19: chr15-59408895;