12-57749222-A-C

Position:

• chr12-57749222-A-C

Variant summary

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

The NM_000075.4(CDK4):​c.779T>G​(p.Val260Gly) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. V260E) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: CDK4 NM_000075.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.78

Genes affected

CDK4 (HGNC:1773): (cyclin dependent kinase 4) The protein encoded by this gene is a member of the Ser/Thr protein kinase family. This protein is highly similar to the gene products of S. cerevisiae cdc28 and S. pombe cdc2. It is a catalytic subunit of the protein kinase complex that is important for cell cycle G1 phase progression. The activity of this kinase is restricted to the G1-S phase, which is controlled by the regulatory subunits D-type cyclins and CDK inhibitor p16(INK4a). This kinase was shown to be responsible for the phosphorylation of retinoblastoma gene product (Rb). Mutations in this gene as well as in its related proteins including D-type cyclins, p16(INK4a) and Rb were all found to be associated with tumorigenesis of a variety of cancers. Multiple polyadenylation sites of this gene have been reported. [provided by RefSeq, Jul 2008]

TSPAN31 (HGNC:10539): (tetraspanin 31) The protein encoded by this gene is a member of the transmembrane 4 superfamily, also known as the tetraspanin family. Most of these members are cell-surface proteins that are characterized by the presence of four hydrophobic domains. The proteins mediate signal transduction events that play a role in the regulation of cell development, activation, growth and motility. This encoded protein is thought to be involved in growth-related cellular processes. This gene is associated with tumorigenesis and osteosarcoma. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CDK4	NM_000075.4	c.779T>G	p.Val260Gly	missense_variant	7/8	ENST00000257904.11
TSPAN31	NM_005981.5	c.*1932A>C		3_prime_UTR_variant	6/6	ENST00000257910.8
TSPAN31	NM_001330168.2	c.*1932A>C		3_prime_UTR_variant	4/4
TSPAN31	NM_001330169.2	c.*1932A>C		3_prime_UTR_variant	6/6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CDK4	ENST00000257904.11	c.779T>G	p.Val260Gly	missense_variant	7/8	1	NM_000075.4	P1
TSPAN31	ENST00000257910.8	c.*1932A>C		3_prime_UTR_variant	6/6	1	NM_005981.5	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.27
BayesDel_addAF	Pathogenic	0.18	D
BayesDel_noAF	Uncertain	0.030
CADD	Pathogenic	26
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.54	D;.;T
Eigen	Uncertain	0.24
Eigen_PC	Uncertain	0.29
FATHMM_MKL	Uncertain	0.84	D
LIST_S2	Benign	0.61	T;T;T
M_CAP	Uncertain	0.086	D
MetaRNN	Uncertain	0.53	D;D;D
MetaSVM	Benign	-0.29	T
MutationAssessor	Benign	1.7	L;.;.
MutationTaster	Benign	1.0	D;D;D;D;D
PrimateAI	Uncertain	0.69	T
PROVEAN	Pathogenic	-5.0	D;D;D
REVEL	Benign	0.27
Sift	Uncertain	0.019	D;D;D
Sift4G	Uncertain	0.031	D;D;.
Polyphen		0.70	P;.;.
Vest4		0.35
MutPred		0.53		Loss of stability (P = 0.0273);.;.;
MVP		0.93
MPC		0.94
ClinPred		0.98	D
GERP RS		4.4
Varity_R		0.81
gMVP		0.70

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.11		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: chr12-58143005;