13-36433067-G-T

Position:

• chr13-36433067-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.11G>T​(p.Ser4Ile) 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: 32)
• Consequence: CCNA1 ENST00000255465.8 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.650

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=0.1701614).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
CCNA1	NM_001413923.1	c.11G>T	p.Ser4Ile	missense_variant	2/9	ENST00000255465.8	NP_001400852.1
CCNA1	XM_011535294.3	c.11G>T	p.Ser4Ile	missense_variant	2/9		XP_011533596.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CCNA1	ENST00000255465.8	c.11G>T	p.Ser4Ile	missense_variant	2/9	1	NM_001413923.1	ENSP00000255465	P1
CCNA1	ENST00000625767.2	c.11G>T	p.Ser4Ile	missense_variant	2/9	1		ENSP00000486017	P1
CCNA1	ENST00000440264.5	c.11G>T	p.Ser4Ile	missense_variant	2/9	2		ENSP00000400666	P1
CCNA1	ENST00000630422.2	c.11G>T	p.Ser4Ile	missense_variant	2/9	2		ENSP00000486482	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

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

Jun 10, 2024

The c.143G>T (p.S48I) alteration is located in exon 2 (coding exon 2) of the CCNA1 gene. This alteration results from a G to T substitution at nucleotide position 143, causing the serine (S) at amino acid position 48 to be replaced by an isoleucine (I). 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	0.11
BayesDel_addAF	Benign	-0.19	T
BayesDel_noAF	Benign	-0.51
CADD	Benign	17
DANN	Uncertain	0.99
DEOGEN2	Benign	0.19	.;.;T;.
Eigen	Benign	-0.32
Eigen_PC	Benign	-0.46
FATHMM_MKL	Benign	0.23	N
LIST_S2	Benign	0.44	.;T;T;T
M_CAP	Benign	0.0063	T
MetaRNN	Benign	0.17	T;T;T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	1.4	.;.;L;.
MutationTaster	Benign	1.0	N;N;N;N
PrimateAI	Benign	0.43	T
PROVEAN	Benign	-1.4	.;N;N;.
REVEL	Benign	0.053
Sift	Uncertain	0.0030	.;D;D;.
Sift4G	Uncertain	0.0050	D;D;D;D
Polyphen		0.84, 0.90	.;.;P;P
Vest4		0.38
MutPred		0.43		.;.;Loss of disorder (P = 0.0024);.;
MVP		0.63
MPC		0.81
ClinPred		0.59	D
GERP RS		2.9
Varity_R		0.054
gMVP		0.56

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.050		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: rs2055735914; hg19: chr13-37007204;