chr12-4293522-A-G

Variant names:

• chr12-4293522-A-G
• rs3217881
• NM_001759.4:c.720+4532A>G

Variant summary

Our verdict is Benign. The variant received -12 ACMG points: 0P and 12B. BP4_Strong BA1

The NM_001759.4(CCND2):​c.720+4532A>G variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.448 in 152,028 control chromosomes in the GnomAD database, including 16,460 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: 𝑓 0.45 (16460 hom., cov: 32)
• Consequence: CCND2 NM_001759.4 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.206
• Publications: 6 publications found

Genes affected

CCND2 (HGNC:1583): (cyclin D2) 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. This cyclin forms a complex with CDK4 or CDK6 and functions as a regulatory subunit of the complex, whose activity is required for cell cycle G1/S transition. This protein has been shown to interact with and be involved in the phosphorylation of tumor suppressor protein Rb. Knockout studies of the homologous gene in mouse suggest the essential roles of this gene in ovarian granulosa and germ cell proliferation. High level expression of this gene was observed in ovarian and testicular tumors. Mutations in this gene are associated with megalencephaly-polymicrogyria-polydactyly-hydrocephalus syndrome 3 (MPPH3). [provided by RefSeq, Sep 2014]

CCND2 Gene-Disease associations (from GenCC):

• megalencephaly-polymicrogyria-polydactyly-hydrocephalus syndrome 3

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Ambry Genetics, Genomics England PanelApp, G2P, Labcorp Genetics (formerly Invitae)
• megalencephaly-polymicrogyria-postaxial polydactyly-hydrocephalus syndrome

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ENSG00000285901 (HGNC:):

ACMG classification

Our verdict: Benign. The variant received -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.9).
• BA1: GnomAd4 highest subpopulation (NFE) allele frequency at 95% confidence interval = 0.545 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CCND2	NM_001759.4	c.720+4532A>G		intron_variant	Intron 4 of 4	ENST00000261254.8	NP_001750.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CCND2	ENST00000261254.8	c.720+4532A>G		intron_variant	Intron 4 of 4	1	NM_001759.4	ENSP00000261254.3
ENSG00000285901	ENST00000674624.1	n.720+4532A>G		intron_variant	Intron 4 of 9			ENSP00000501898.1

Frequencies

GnomAD3 genomes AF: 0.448 AC: 68079 AN: 151910 Hom.: 16457 Cov.: 32

Gnomad AFR AF: 0.309

Gnomad AMI AF: 0.464

Gnomad AMR AF: 0.414

Gnomad ASJ AF: 0.599

Gnomad EAS AF: 0.177

Gnomad SAS AF: 0.346

Gnomad FIN AF: 0.502

Gnomad MID AF: 0.611

Gnomad NFE AF: 0.550

Gnomad OTH AF: 0.478

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.448 AC: 68110 AN: 152028 Hom.: 16460 Cov.: 32 AF XY: 0.443 AC XY: 32893 AN XY: 74322

African (AFR) AF: 0.309 AC: 12829 AN: 41464

American (AMR) AF: 0.413 AC: 6311 AN: 15274

Ashkenazi Jewish (ASJ) AF: 0.599 AC: 2077 AN: 3470

East Asian (EAS) AF: 0.177 AC: 914 AN: 5174

South Asian (SAS) AF: 0.347 AC: 1672 AN: 4818

European-Finnish (FIN) AF: 0.502 AC: 5302 AN: 10558

Middle Eastern (MID) AF: 0.612 AC: 180 AN: 294

European-Non Finnish (NFE) AF: 0.550 AC: 37388 AN: 67958

Other (OTH) AF: 0.482 AC: 1016 AN: 2110

Alfa AF: 0.521 Hom.: 16347

Bravo AF: 0.434

Asia WGS AF: 0.280 AC: 973 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.90
CADD	Benign	1.6
DANN	Benign	0.22
PhyloP100		-0.21
Mutation Taster		=100/0	polymorphism (auto)

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: rs3217881; hg19: chr12-4402688;