Component
PPIP5K2 (human diphosphoinositol pentakisphosphate kinase 2)
PPIP5K2 (human diphosphoinositol pentakisphosphate kinase 2). Species, exposure and limitations are retained in each linked claim.
1 recorded relationships. Experimental role, claim status and evidence remain attached to each record.
How nutrients influence it
Every nutrient with a recorded effect on this component, credited to the nutrient that acted rather than the chapter that recorded it. Open a nutrient to see the findings and the conditions they were measured under.
Other things that act on it
Enzymes, hormones, genes, and other components with a recorded effect. These are not nutrients, so they do not count toward the arrows above. Each finding names the chapter that recorded it.
How nutrients reach it in more than one step
Chains of two or more recorded steps that end here, grouped by the nutrient they start from. Each step is a separate finding, so a chain is a route a mechanism could take, not proof that it does.
Tracing routes…
What it does
Every recorded relationship this component is part of, grouped by its role. Plain wording comes first; the technical statement follows.
What acts on it
Phosphate increased PPIP5K2 5-InsP7 kinase activity approximately twofold across 0–5 mM.
Experimental context and source evidence
- evidence_span
- {"source_cache": "artifacts/inositol-research/28126903.abstract.txt", "locator": "Exact primary indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "6f5c96ed7d02591d5fe475d0e26aa2f21dc93f0c86c12998debb417f98254d2f", "start_char": 0, "end_char": 1981, "text_sha256": "6f5c96ed7d02591d5fe475d0e26aa2f21dc93f0c86c12998debb417f98254d2f"}
- experimental_model
- Cellular phosphate withdrawal/repletion and bifunctional enzyme kinetics
- exposure
- Phosphate availability and PPIP5K kinase/phosphatase assays
- limitations
- Cell-culture nutrient withdrawal is not a measured human dietary threshold; PPIP5K isoforms are not identical.
- nutrient_topic
- Inositol research collection; topical membership is not evidence of a direct dietary effect. · Inositol (stereoisomer family)
- organism
- Human HCT116 cells and human PPIP5K proteins
- plain_language
- For this isoform, phosphate also increased the signal-building reaction.
- primary_references
- [ino-p28126903] The Significance of the Bifunctional Kinase/Phosphatase Activities of Diphosphoinositol Pentakisphosphate Kinases (PPIP5Ks) for Coupling Inositol Pyrophosphate Cell Signaling to Cellular Phosphate Homeostasis. (2017). https://pubmed.ncbi.nlm.nih.gov/28126903/ DOI: 10.1074/jbc.m116.765743
- tissue_or_cell_type
- Intestinal tumor-derived cell line; purified enzymes
Inositol: synthesis, signaling, mineral interactions and conditional deficiency (2026-09-17) · lines 847–858
AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Cellular phosphate withdrawal/repletion and bifunctional enzyme kinetics · source_derived_draft · unverified_draft
### ino-pi-ppip5k2-kinase Phosphate increased PPIP5K2 5-InsP7 kinase activity approximately twofold across 0–5 mM. Condition category: normal nutrient_topic: Inositol research collection; topical membership is not evidence of a direct dietary effect. plain_language: For this isoform, phosphate also increased the signal-building reaction. organism: Human HCT116 cells and human PPIP5K proteins tissue_or_cell_type: Intestinal tumor-derived cell line; purified enzymes experimental_model: Cellular phosphate withdrawal/repletion and bifunctional enzyme kinetics limitations: Cell-culture nutrient withdrawal is not a measured human dietary threshold; PPIP5K isoforms are not identical. exposure: Phosphate availability and PPIP5K kinase/phosphatase assays evidence_span: {"source_cache": "artifacts/inositol-research/28126903.abstract.txt", "locator": "Exact primary indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "6f5c96ed7d02591d5fe475d0e26aa2f21dc93f0c86c12998debb417f98254d2f", "start_char": 0, "end_char": 1981, "text_sha256": "6f5c96ed7d02591d5fe475d0e26aa2f21dc93f0c86c12998debb417f98254d2f"} [ino-p28126903] The Significance of the Bifunctional Kinase/Phosphatase Activities of Diphosphoinositol Pentakisphosphate Kinases (PPIP5Ks) for Coupling Inositol Pyrophosphate Cell Signaling to Cellular Phosphate Homeostasis. (2017). https://pubmed.ncbi.nlm.nih.gov/28126903/ DOI: 10.1074/jbc.m116.765743
Complete structured claim and evidence
The events it takes part in
A mechanism often involves more than two components. These are the full events, with every participant and its role.
Situations it appears in
Low-supply and faulty-machinery situations recorded in the chapters where this component plays a part.
In the sources
Preserved passages that mention this component, quoted exactly. Open one to read it in context.
Open hypotheses
Proposed ideas that involve this component. They are labeled as hypotheses and do not change any recorded statement.
This is a research prototype built from draft material. It is not medical advice, and its statements still await verification against the original studies.