chr12-57748532-G-A

Variant names:

• chr12-57748532-G-A
• rs749477862
• NM_000075.4:c.905C>T

Variant summary

Our verdict is Likely benign. The variant received -6 ACMG points: 0P and 6B. BP4_Moderate BS2

The NM_000075.4(CDK4):​c.905C>T​(p.Pro302Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000118 in 1,610,828 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. P302A) has been classified as Uncertain significance.

• Frequency:
  • Genomes: 𝑓 0.000033 (0 hom., cov: 32)
  • Exomes 𝑓: 0.0000096 (0 hom.)
• Consequence: CDK4 NM_000075.4 missense
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:4 B:1
• Conservation: PhyloP100: 0.244
• Publications: 1 publications found

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]

MIR6759 (HGNC:50063): (microRNA 6759) microRNAs (miRNAs) are short (20-24 nt) non-coding RNAs that are involved in post-transcriptional regulation of gene expression in multicellular organisms by affecting both the stability and translation of mRNAs. miRNAs are transcribed by RNA polymerase II as part of capped and polyadenylated primary transcripts (pri-miRNAs) that can be either protein-coding or non-coding. The primary transcript is cleaved by the Drosha ribonuclease III enzyme to produce an approximately 70-nt stem-loop precursor miRNA (pre-miRNA), which is further cleaved by the cytoplasmic Dicer ribonuclease to generate the mature miRNA and antisense miRNA star (miRNA*) products. The mature miRNA is incorporated into a RNA-induced silencing complex (RISC), which recognizes target mRNAs through imperfect base pairing with the miRNA and most commonly results in translational inhibition or destabilization of the target mRNA. The RefSeq represents the predicted microRNA stem-loop. [provided by RefSeq, Sep 2009]

ACMG classification

Our verdict: Likely_benign. The variant received -6 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.13780454).
• BS2: High AC in GnomAd4 at 5 AD gene.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000075.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CDK4	NM_000075.4	MANE Select	c.905C>T	p.Pro302Leu	missense	Exon 8 of 8	NP_000066.1
	TSPAN31	NM_005981.5	MANE Select	c.*1242G>A		3_prime_UTR	Exon 6 of 6	NP_005972.1
	TSPAN31	NM_001330169.2		c.*1242G>A		3_prime_UTR	Exon 6 of 6	NP_001317098.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CDK4	ENST00000257904.11	TSL:1 MANE Select	c.905C>T	p.Pro302Leu	missense	Exon 8 of 8	ENSP00000257904.5
	TSPAN31	ENST00000257910.8	TSL:1 MANE Select	c.*1242G>A		3_prime_UTR	Exon 6 of 6	ENSP00000257910.3
	TSPAN31	ENST00000547992.5	TSL:1	c.*1242G>A		3_prime_UTR	Exon 4 of 4	ENSP00000448209.1

Frequencies

GnomAD3 genomes AF: 0.0000329 AC: 5 AN: 152100 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.0000966

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.0000943

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.0000159 AC: 4 AN: 251466 AF XY: 0.0000294

Gnomad AFR exome AF: 0.0000615

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.0000462

Gnomad NFE exome AF: 0.0000176

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000960 AC: 14 AN: 1458728 Hom.: 0 Cov.: 30 AF XY: 0.0000110 AC XY: 8 AN XY: 725924

African (AFR) AF: 0.0000299 AC: 1 AN: 33402

American (AMR) AF: 0.00 AC: 0 AN: 44698

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26098

East Asian (EAS) AF: 0.00 AC: 0 AN: 39672

South Asian (SAS) AF: 0.0000116 AC: 1 AN: 86178

European-Finnish (FIN) AF: 0.0000187 AC: 1 AN: 53352

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5760

European-Non Finnish (NFE) AF: 0.00000901 AC: 10 AN: 1109312

Other (OTH) AF: 0.0000166 AC: 1 AN: 60256

GnomAD4 genome AF: 0.0000329 AC: 5 AN: 152100 Hom.: 0 Cov.: 32 AF XY: 0.0000538 AC XY: 4 AN XY: 74306

African (AFR) AF: 0.0000966 AC: 4 AN: 41418

American (AMR) AF: 0.00 AC: 0 AN: 15270

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3470

East Asian (EAS) AF: 0.00 AC: 0 AN: 5188

South Asian (SAS) AF: 0.00 AC: 0 AN: 4828

European-Finnish (FIN) AF: 0.0000943 AC: 1 AN: 10600

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 314

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 68010

Other (OTH) AF: 0.00 AC: 0 AN: 2090

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.0000113

ExAC AF: 0.00000824 AC: 1

ClinVar

ClinVar submissions as Germline

Significance: Conflicting classifications of pathogenicity

Revision: criteria provided, conflicting classifications

Pathogenic	VUS	Benign	Condition
-	1	-	Familial melanoma (1)
-	1	-	Hereditary cancer (1)
-	-	1	Hereditary cancer-predisposing syndrome (1)
-	1	-	not provided (1)
-	1	-	not specified (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.068
BayesDel_addAF	Benign	-0.22	T
BayesDel_noAF	Benign	-0.37
CADD	Benign	17
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.52	D
Eigen	Benign	-0.47
Eigen_PC	Benign	-0.33
FATHMM_MKL	Benign	0.31	N
LIST_S2	Benign	0.61	T
M_CAP	Benign	0.027	D
MetaRNN	Benign	0.14	T
MetaSVM	Benign	-0.81	T
MutationAssessor	Benign	1.9	L
PhyloP100		0.24
PrimateAI	Benign	0.37	T
PROVEAN	Benign	-0.25	N
REVEL	Benign	0.24
Sift	Uncertain	0.025	D
Sift4G	Uncertain	0.039	D
Polyphen		0.20	B
Vest4		0.16
MutPred		0.35		Gain of stability (P = 0.0159)
MVP		0.76
MPC		0.64
ClinPred		0.31	T
GERP RS		3.5
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.023
gMVP		0.45
Mutation Taster		=81/19	polymorphism

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

Other links and lift over

dbSNP: rs749477862; hg19: chr12-58142315;