13-36437795-G-T

Position:

• chr13-36437795-G-T

Variant summary

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

The ENST00000255465.8(CCNA1):​c.332G>T​(p.Gly111Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,461,870 control chromosomes in the GnomAD database, with no homozygous occurrence. 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)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: CCNA1 ENST00000255465.8 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.647

Genes affected

CCNA1 (HGNC:1577): (cyclin A1) The protein encoded by this gene belongs to the highly conserved cyclin family, whose members are characterized by a dramatic periodicity in protein abundance through the cell cycle. Cyclins function as regulators of CDK kinases. Different cyclins exhibit distinct expression and degradation patterns which contribute to the temporal coordination of each mitotic event. The cyclin encoded by this gene was shown to be expressed in testis and brain, as well as in several leukemic cell lines, and is thought to primarily function in the control of the germline meiotic cell cycle. This cyclin binds both CDK2 and CDC2 kinases, which give two distinct kinase activities, one appearing in S phase, the other in G2, and thus regulate separate functions in cell cycle. This cyclin was found to bind to important cell cycle regulators, such as Rb family proteins, transcription factor E2F-1, and the p21 family proteins. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jul 2008]

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=0.11574).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
CCNA1	NM_001111045.4	c.332G>T	p.Gly111Val	missense_variant	3/9		NP_001104515.2
CCNA1	NM_001111046.2	c.332G>T	p.Gly111Val	missense_variant	3/9		NP_001104516.1
CCNA1	NM_001111047.2	c.332G>T	p.Gly111Val	missense_variant	3/9		NP_001104517.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CCNA1	ENST00000255465.8	c.332G>T	p.Gly111Val	missense_variant	3/9	1		ENSP00000255465.5
CCNA1	ENST00000625767.2	c.332G>T	p.Gly111Val	missense_variant	3/9	1		ENSP00000486017.2
CCNA1	ENST00000440264.5	c.332G>T	p.Gly111Val	missense_variant	3/9	2		ENSP00000400666.1
CCNA1	ENST00000630422.2	c.332G>T	p.Gly111Val	missense_variant	3/9	2		ENSP00000486482.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD3 exomes AF: 0.00000795 AC: 2 AN: 251426 Hom.: 0 AF XY: 0.00000736 AC XY: 1 AN XY: 135884

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000578

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1461870 Hom.: 0 Cov.: 32 AF XY: 0.00000138 AC XY: 1 AN XY: 727238

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.0000447

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

ExAC AF: 0.00000824 AC: 1

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 24, 2024

The c.464G>T (p.G155V) alteration is located in exon 3 (coding exon 3) of the CCNA1 gene. This alteration results from a G to T substitution at nucleotide position 464, causing the glycine (G) at amino acid position 155 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	0.086
BayesDel_addAF	Benign	-0.35	T
BayesDel_noAF	Benign	-0.56
CADD	Benign	3.8
DANN	Benign	0.80
DEOGEN2	Benign	0.059	.;.;T;.
Eigen	Benign	-0.52
Eigen_PC	Benign	-0.46
FATHMM_MKL	Benign	0.62	D
LIST_S2	Benign	0.72	.;T;T;T
M_CAP	Benign	0.0052	T
MetaRNN	Benign	0.12	T;T;T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Uncertain	2.3	.;.;M;.
MutationTaster	Benign	1.0	D;D;D;D
PrimateAI	Benign	0.25	T
PROVEAN	Benign	0.70	.;N;N;.
REVEL	Benign	0.020
Sift	Benign	0.23	.;T;T;.
Sift4G	Benign	0.26	T;T;T;T
Polyphen		0.0040	.;.;B;B
Vest4		0.28
MutPred		0.44		.;.;Loss of disorder (P = 0.055);.;
MVP		0.62
MPC		0.53
ClinPred		0.079	T
GERP RS		3.3
Varity_R		0.040
gMVP		0.25

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: rs769065045; hg19: chr13-37011932;