X-ray crystallographic analyses of 14 IPMK inhibitor complexes
Biorxiv : the Preprint Server for Biology
|May 20, 2024
Summary
New crystal structures of inositol polyphosphate multikinase (IPMK) reveal key details about its ATP-binding site. These findings advance understanding of IPMK inhibitors for cancer therapy.
Area of Science:
- Biochemistry and structural biology
- Cancer research
Background:
- Inositol polyphosphate multikinase (IPMK) is a crucial enzyme implicated in various cancers.
- Understanding IPMK's structure is vital for developing targeted cancer therapies.
Approach:
- Determined 14 new co-crystal structures of human IPMK with inhibitors at high resolution (1.7Å - 2.0Å).
- Utilized X-ray crystallography to visualize inhibitor-bound IPMK complexes.
- Deposited new structures in the Protein Data Bank (PDB codes: 8V6W-8V79).
Key Points:
- Identified two ordered water molecules forming hydrogen-bonding networks within the IPMK active site.
- Discovered an unoccupied pocket adjacent to the ATP-binding site, offering potential for novel inhibitor design.
- Provided detailed structural insights into human IPMK in complex with diverse inhibitors.
Conclusions:
- The new structures offer a detailed molecular basis for the mechanism of action of IPMK inhibitors.
- The identified unoccupied pocket presents a promising target for developing next-generation IPMK-specific cancer drugs.
- These findings contribute significantly to the structural understanding of IPMK and its inhibition in cancer contexts.
