14-99502970-G-A

Variant names:

• chr14-99502970-G-A
• rs771462544
• NM_001099402.2:c.997G>A

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 3P and 2B. PM2 PP2 BP4_Moderate

The NM_001099402.2(CCNK):​c.997G>A​(p.Val333Ile) variant causes a missense change. The variant allele was found at a frequency of 0.00000657 in 152,186 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/22 in silico tools predict a benign outcome for this variant. 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. V333F) has been classified as Uncertain significance.

• Frequency: Genomes: 𝑓 0.0000066 (0 hom., cov: 32)
• Consequence: CCNK NM_001099402.2 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 4.41
• Publications: 0 publications found

Genes affected

CCNK (HGNC:1596): (cyclin K) The protein encoded by this gene is a member of the transcription cyclin family. These cyclins may regulate transcription through their association with and activation of cyclin-dependent kinases (CDK) that phosphorylate the C-terminal domain (CTD) of the large subunit of RNA polymerase II. This gene product may play a dual role in regulating CDK and RNA polymerase II activities. [provided by RefSeq, Jul 2008]

CCDC85C (HGNC:35459): (coiled-coil domain containing 85C) Predicted to be involved in cerebral cortex development. Located in adherens junction. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Our verdict: Uncertain_significance. The variant received 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in the gene, where a lot of missense mutations are associated with disease in ClinVar. The gene has 1 curated pathogenic missense variants (we use a threshold of 10). The gene has 0 curated benign missense variants. Gene score misZ: 3.305 (above the threshold of 3.09). Trascript score misZ: 1.9964 (below the threshold of 3.09). GenCC associations: The gene is linked to intellectual developmental disorder with hypertelorism and distinctive facies.
• BP4: Computational evidence support a benign effect (MetaRNN=0.07769555).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001099402.2. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CCNK	NM_001099402.2	MANE Select	c.997G>A	p.Val333Ile	missense	Exon 8 of 11	NP_001092872.1	O75909-3
	CCDC85C	NM_001144995.2	MANE Select	c.*12276C>T		3_prime_UTR	Exon 6 of 6	NP_001138467.1	A6NKD9

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CCNK	ENST00000389879.9	TSL:5 MANE Select	c.997G>A	p.Val333Ile	missense	Exon 8 of 11	ENSP00000374529.5	O75909-3
	CCNK	ENST00000555049.5	TSL:1	c.997G>A	p.Val333Ile	missense	Exon 8 of 11	ENSP00000452307.1	G3V5E1
	CCDC85C	ENST00000380243.9	TSL:5 MANE Select	c.*12276C>T		3_prime_UTR	Exon 6 of 6	ENSP00000369592.4	A6NKD9

Frequencies

GnomAD3 genomes AF: 0.00000657 AC: 1 AN: 152186 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.00

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: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000147

Gnomad OTH AF: 0.00

GnomAD4 exome Cov.: 31

GnomAD4 genome AF: 0.00000657 AC: 1 AN: 152186 Hom.: 0 Cov.: 32 AF XY: 0.0000135 AC XY: 1 AN XY: 74344

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.00 AC: 0 AN: 41432

American (AMR) AF: 0.00 AC: 0 AN: 15286

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3472

East Asian (EAS) AF: 0.00 AC: 0 AN: 5182

South Asian (SAS) AF: 0.00 AC: 0 AN: 4824

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10624

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 316

European-Non Finnish (NFE) AF: 0.0000147 AC: 1 AN: 68044

Other (OTH) AF: 0.00 AC: 0 AN: 2094

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5. (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

Alfa AF: 0.00 Hom.: 0

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.064
BayesDel_addAF	Benign	-0.10	T
BayesDel_noAF	Benign	-0.39
CADD	Benign	19
DANN	Benign	0.82
DEOGEN2	Benign	0.087	T
Eigen	Benign	-0.41
Eigen_PC	Benign	-0.24
FATHMM_MKL	Uncertain	0.90	D
LIST_S2	Benign	0.72	T
M_CAP	Benign	0.015	T
MetaRNN	Benign	0.078	T
MetaSVM	Benign	-0.68	T
MutationAssessor	Benign	-0.34	N
PhyloP100		4.4
PrimateAI	Benign	0.31	T
PROVEAN	Benign	-0.060	N
REVEL	Benign	0.14
Sift	Benign	0.49	T
Sift4G	Benign	0.51	T
Polyphen		0.0	B
Vest4		0.041
MutPred		0.27		Gain of catalytic residue at R331 (P = 0.0103)
MVP		0.52
MPC		0.22
ClinPred		0.38	T
GERP RS		6.0
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.019
gMVP		0.019
Mutation Taster		=87/13	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: rs771462544; hg19: chr14-99969307;