5-69171433-C-T

Position:

• chr5-69171433-C-T

Variant summary

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

The NM_031966.4(CCNB1):​c.527C>T​(p.Ala176Val) 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 (★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: CCNB1 NM_031966.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.00300

Genes affected

CCNB1 (HGNC:1579): (cyclin B1) The protein encoded by this gene is a regulatory protein involved in mitosis. The gene product complexes with p34(cdc2) to form the maturation-promoting factor (MPF). The encoded protein is necessary for proper control of the G2/M transition phase of the cell cycle. [provided by RefSeq, Aug 2017]

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=0.15279084).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
CCNB1	NM_031966.4	c.527C>T	p.Ala176Val	missense_variant	4/9	ENST00000256442.10	NP_114172.1
CCNB1	NM_001354844.2	c.527C>T	p.Ala176Val	missense_variant	4/8		NP_001341773.1
CCNB1	NM_001354845.2	c.527C>T	p.Ala176Val	missense_variant	4/8		NP_001341774.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CCNB1	ENST00000256442.10	c.527C>T	p.Ala176Val	missense_variant	4/9	1	NM_031966.4	ENSP00000256442.5

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 33

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 17, 2024

The c.527C>T (p.A176V) alteration is located in exon 4 (coding exon 4) of the CCNB1 gene. This alteration results from a C to T substitution at nucleotide position 527, causing the alanine (A) at amino acid position 176 to be replaced by a valine (V). 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	0.093
BayesDel_addAF	Benign	-0.18	T
BayesDel_noAF	Benign	-0.50
CADD	Benign	19
DANN	Uncertain	0.98
DEOGEN2	Benign	0.10	T;T;T;.
Eigen	Benign	-0.44
Eigen_PC	Benign	-0.34
FATHMM_MKL	Benign	0.22	N
LIST_S2	Benign	0.55	T;T;T;T
M_CAP	Benign	0.0064	T
MetaRNN	Benign	0.15	T;T;T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	1.3	L;.;.;L
PrimateAI	Benign	0.26	T
PROVEAN	Benign	-1.4	N;N;N;N
REVEL	Benign	0.054
Sift	Benign	0.29	T;T;T;T
Sift4G	Benign	0.28	T;T;T;T
Polyphen		0.018	B;B;.;.
Vest4		0.12
MutPred		0.50		Gain of methylation at K172 (P = 0.1204);Gain of methylation at K172 (P = 0.1204);Gain of methylation at K172 (P = 0.1204);Gain of methylation at K172 (P = 0.1204);
MVP		0.82
MPC		0.053
ClinPred		0.21	T
GERP RS		3.0
Varity_R		0.15
gMVP		0.26

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr5-68467260;