Cyclin K
protein-coding gene in the species Homo sapiens
Cyclin-K is a protein that in humans is encoded by the CCNK gene.
Function
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 (CDKs) through conformational changes. Activation of CDKs through their cyclin partner, creates kinase complexes that will activate target proteins through phosphorylation. Targeted proteins can then ultimately regulate decisions of a cell's progression within the cell cycle to occur. This gene product may be seen to play a dual role in both regulating CDK and RNA polymerase II (RNAP2) activities. Cyclin K only uses RNA recruitment to activate transcription.
Interactions
Cyclin K has been shown to interact with multiple CDKs including CDK9 and latest CDK12 and CDK13. Roles include helping to phosphorylate C-terminal domains of subunits of RNAP2. Cyclin K is most noted for its associated induction of processive elongation.
The public source identifies “Cyclin K” as protein-coding gene in the species Homo sapiens. This brief keeps that definition visible, then builds a research path around Cyclin, protein-coding and gene.
Why this record matters
A short description can identify a subject without explaining its stakes. For “Cyclin K”, the useful work is to connect “protein-coding gene in the species Homo sapiens” to the records capable of establishing context and consequence.
Datasets, specimens, observations and peer-reviewed methods provide the appropriate test for the technical claims summarized here. The source revision retrieved here is dated Jul 16, 2025. The linked authority identifier is Q18033430. None of the 0 selected statements returned an explicit reference.
Current terminology should not be projected backward without checking the classification used when the underlying evidence was created. The source lead contains qualifying language; that uncertainty should survive quotation, summary and reuse. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
How to read it
Check terminology, classification and the date of the cited evidence. Scientific names and technical consensus can change while older records retain historical value.
- Current terminology
- Classification context
- Finding cited technical literature
Primary datasets, specimen catalogues, standards bodies and the most recent peer-reviewed literature.
Three-step research path
- Establish the record: confirm the title “Cyclin K”, its source revision and the description used here.
- Expand the search: follow Cyclin K primary sources, Cyclin K archive and Cyclin research across catalogues and specialist indexes.
- Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.
Questions for further research
- Which source most directly establishes the central claim about “Cyclin K”?
- Is the terminology current, historical or disputed?
- Has classification or technical consensus changed since the cited source?
Search terms from this dossier
This entry incorporates text from “Cyclin K” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.