NM_001759.4:c.720+931T>G

Variant names:

• chr12-4289921-T-G
• rs3217862
• NM_001759.4:c.720+931T>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+931T>G variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.158 in 152,136 control chromosomes in the GnomAD database, including 2,089 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 0.16 (2089 hom., cov: 32)
• Consequence: CCND2 NM_001759.4 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.11
• Publications: 11 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=-0.84).
• BA1: GnomAd4 highest subpopulation (EAS) allele frequency at 95% confidence interval = 0.319 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CCND2	NM_001759.4	c.720+931T>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+931T>G		intron_variant	Intron 4 of 4	1	NM_001759.4	ENSP00000261254.3
ENSG00000285901	ENST00000674624.1	n.720+931T>G		intron_variant	Intron 4 of 9			ENSP00000501898.1

Frequencies

GnomAD3 genomes AF: 0.158 AC: 23970 AN: 152018 Hom.: 2083 Cov.: 32

Gnomad AFR AF: 0.109

Gnomad AMI AF: 0.135

Gnomad AMR AF: 0.148

Gnomad ASJ AF: 0.122

Gnomad EAS AF: 0.332

Gnomad SAS AF: 0.173

Gnomad FIN AF: 0.163

Gnomad MID AF: 0.114

Gnomad NFE AF: 0.176

Gnomad OTH AF: 0.173

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

GnomAD4 genome AF: 0.158 AC: 23992 AN: 152136 Hom.: 2089 Cov.: 32 AF XY: 0.159 AC XY: 11794 AN XY: 74378

African (AFR) AF: 0.109 AC: 4533 AN: 41506

American (AMR) AF: 0.148 AC: 2261 AN: 15296

Ashkenazi Jewish (ASJ) AF: 0.122 AC: 423 AN: 3468

East Asian (EAS) AF: 0.332 AC: 1717 AN: 5172

South Asian (SAS) AF: 0.172 AC: 832 AN: 4826

European-Finnish (FIN) AF: 0.163 AC: 1722 AN: 10588

Middle Eastern (MID) AF: 0.122 AC: 36 AN: 294

European-Non Finnish (NFE) AF: 0.176 AC: 11966 AN: 67962

Other (OTH) AF: 0.179 AC: 379 AN: 2112

Alfa AF: 0.169 Hom.: 4392

Bravo AF: 0.152

Asia WGS AF: 0.278 AC: 962 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.84
CADD	Benign	9.5
DANN	Benign	0.42
PhyloP100		1.1
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: rs3217862; hg19: chr12-4399087;