Related Experiment Video

Updated: Jul 16, 2026

Identification of Cyclin-dependent Kinase 1 Specific Phosphorylation Sites by an In Vitro Kinase Assay
12:26

Identification of Cyclin-dependent Kinase 1 Specific Phosphorylation Sites by an In Vitro Kinase Assay

Published on: May 3, 2018

Cdc25 phosphatases: structure, specificity, and mechanism

Johannes Rudolph1

  • 1Department of Biochemistry, Duke University Medical Center, Durham, North Carolina 27710, USA. rudolph@biochem.duke.edu

Biochemistry
|March 3, 2007
PubMed

Insights

Cdc25 phosphatases activate Cdk/cyclins to regulate the cell cycle. Their overexpression in cancers makes them key targets for developing novel anticancer drugs, with recent enzymology studies aiding inhibitor design.

Area of Science:

  • Biochemistry
  • Molecular Biology
  • Cancer Research

Background:

  • Cdc25 phosphatases are crucial activators of cyclin-dependent kinases (Cdk)/cyclins, governing eukaryotic cell cycle progression.
  • Overexpression of Cdc25 phosphatases is linked to poor prognosis across various cancers, highlighting their oncogenic role.
  • Understanding Cdc25 phosphatase function is vital for developing targeted cancer therapies.

Purpose of the Study:

  • To review the structure, specificity, and enzymatic mechanisms of Cdc25 phosphatases.
  • To focus on the activity of Cdc25 phosphatases with their native protein substrates.
  • To consolidate recent enzymological findings for the development of specific Cdc25 inhibitors.

Main Methods:

  • Literature review of existing research on Cdc25 phosphatases.
  • Analysis of structural, specificity, and mechanistic data.
  • Focus on studies detailing interactions with native protein substrates.

Main Results:

  • Significant advancements in understanding Cdc25 phosphatase enzymology have been achieved.
  • Detailed insights into the structure and substrate specificity are available.
  • Mechanistic studies provide a foundation for inhibitor development.

Conclusions:

  • Cdc25 phosphatases are validated targets for anticancer drug development due to their role in cell cycle regulation and cancer progression.
  • Recent enzymological data facilitates the rational design of specific Cdc25 inhibitors.
  • Further research into Cdc25 phosphatase activity with native substrates will refine therapeutic strategies.

More Related Videos

A Mass Spectrometry-Based Approach to Identify Phosphoprotein Phosphatases and their Interactors10:17

A Mass Spectrometry-Based Approach to Identify Phosphoprotein Phosphatases and their Interactors

Published on: April 29, 2022

PIP-on-a-chip: A Label-free Study of Protein-phosphoinositide Interactions10:58

PIP-on-a-chip: A Label-free Study of Protein-phosphoinositide Interactions

Published on: July 27, 2017

Related Concept Videos

Protein Kinases and Phosphatases02:54

Protein Kinases and Phosphatases

Proteins undergo chemical modifications that trigger changes in the charge, structure, and conformation of the proteins. Phosphorylation, acetylation, glycosylation, nitrosylation, ubiquitination, lipidation, methylation, and proteolysis are various protein modifications that regulate protein activity. Such modifications are usually enzyme-driven.
Protein kinases
Many proteins in the cell are regulated by phosphorylation, the addition of a phosphate group. A family of enzymes called kinases...
Protein Kinases and Phosphatases02:54

Protein Kinases and Phosphatases

Proteins undergo chemical modifications that trigger changes in the charge, structure, and conformation of the proteins. Phosphorylation, acetylation, glycosylation, nitrosylation, ubiquitination, lipidation, methylation, and proteolysis are various protein modifications that regulate protein activity. Such modifications are usually enzyme-driven.
Protein kinases
Many proteins in the cell are regulated by phosphorylation, the addition of a phosphate group. A family of enzymes called kinases...
Covalently Linked Protein Regulators02:04

Covalently Linked Protein Regulators

Proteins can undergo many types of post-translational modifications, often in response to changes in their environment. These modifications play an important role in the function and stability of these proteins. Covalently linked molecules include functional groups, such as methyl, acetyl, and phosphate groups, and also small proteins, such as ubiquitin. There are around 200 different types of covalent regulators that have been identified.
These groups modify specific amino acids in a protein.
Calmodulin-dependent Signaling01:16

Calmodulin-dependent Signaling

Calmodulin (CaM) is a calcium-binding protein in eukaryotes that controls various calcium-regulated cellular processes. It has four calcium-binding sites that bind calcium to form the calcium-calmodulin ( Ca2+-CaM) complex. GPCR stimulation increases the calcium levels in the cells that bind to CaM and induces a conformational change.
The Ca2+-CaM complex does not have enzymatic activity by itself. Instead, the complex binds downstream target proteins, including membrane proteins or enzymes,...
Catenins01:23

Catenins

Catenins are characterized by multiple binding domains and dynamic structures that allow them to function as linker proteins in cell junction complexes. All catenins, except α-catenin, contain a characteristic protein sequence called the armadillo repeat and are therefore also called armadillo proteins.
Catenins in Cell Junctions
Catenins bind to cell adhesion molecules such as cadherins and link them to different cytoskeletal proteins depending on the type of cell junction. At the adherens...
Phosphorylation01:02

Phosphorylation

The addition or removal of phosphate groups from proteins is the most common chemical modification that regulates cellular processes. These modifications can affect the structure, activity, stability, and localization of proteins within cells as well as their interactions with other proteins.
During phosphorylation, protein kinases transfer the terminal phosphate group of ATP to specific amino acid side chains of substrate proteins. Serine, threonine, and tyrosine are the most commonly...