RESEARCH: CANCER
FOLDING PROJECT #12474 PROFILE

Pin1 is a protein that helps control how cells work by changing the shape of other proteins. Scientists are using computer models to understand how Pin1 works and find ways to use it to treat diseases like cancer.

Note: This TLDR is a simplication and may not be 100% accurate.

Human Pin1 is a peptidyl prolyl isomerase (PPI) involved in many cell signaling processes and a target for cancer therapeutics.

The job of this protein is to recognize proline residues next to phosphorylated serines and threonines, and catalyze the cis/trans isomerization of the proline backbone. Pin1 has two domains that both recognize these motifs: a catalytic domain, and a so-called WW domain, which exists in a conformational equilibrium between and a compact and extended state.

When peptide substrates are present, there is a shift in the conformational equilibrium between compact and extended states, which is in turn coupled to allosteric changes in the catalytic domain that activates the enzyme. The purpose of these simulations is to better learn about the function of Pin1 by modeling the conformational dynamics involved in its allosteric activation.

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Pin1

A peptidyl prolyl isomerase (PPI) involved in cell signaling processes.

Pin1 is a protein that plays a crucial role in cell signaling pathways. It acts as a catalyst, specifically targeting proline residues within proteins and influencing their shape. This process is essential for various cellular functions, including growth, development, and response to external stimuli. In the context of cancer therapeutics, Pin1 has emerged as a potential target for drug development due to its involvement in tumor growth and progression.

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Peptidyl Prolyl Isomerase (PPI)

Peptidyl Prolyl Isomerase

A type of enzyme that catalyzes the cis-trans isomerization of proline residues in proteins. This process is crucial for protein folding and function. PPIs play a role in various cellular processes, including signal transduction and immune responses.

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Proline

An essential amino acid with a unique cyclic structure.

Proline is an amino acid that plays a vital role in protein structure and function. Its cyclic side chain introduces rigidity and kinks into polypeptide chains, influencing the overall conformation of proteins. Proline residues are often found at specific locations within proteins, where they contribute to structural stability or mediate interactions with other molecules.

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Phosphorylated

The addition of a phosphate group to a molecule.

Phosphorylation is a common biochemical modification that involves the covalent attachment of a phosphate group to a molecule. This process often regulates protein activity, signaling pathways, and cellular processes. Phosphorylation can activate or deactivate enzymes, alter protein interactions, and influence gene expression.

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Allosteric Activation

A change in enzyme activity caused by binding of a molecule at a site other than the active site.

Allosteric activation is a process that enhances enzyme activity through binding of a molecule (allosteric effector) to a regulatory site distinct from the active site. This binding induces conformational changes that improve substrate binding or catalytic efficiency. Allosteric activation plays a crucial role in regulating metabolic pathways and cellular responses.

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Conformational Equilibrium

The balance between different structural states of a molecule.

Conformational equilibrium describes the dynamic balance between multiple structural conformations of a molecule. Proteins constantly fluctuate between these states, which influence their function and interactions. Factors such as temperature, pH, and binding events can shift this equilibrium towards specific conformations.