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Archival Research

Archival Research

Some researchers gain access to large amounts of data without interacting with a single research participant. Instead, they use existing records to answer various research questions. This type of research approach is known as archival research. Archival research relies on looking at past records or data sets to look for interesting patterns or relationships. For example, a researcher might access the academic records of all individuals who enrolled in college within the past ten years and...

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Updated: Nov 14, 2025

Antibiotic Dereplication Using the Antibiotic Resistance Platform

Antibiotic Dereplication Using the Antibiotic Resistance Platform

Published on: October 17, 2019

DARPP-32 40 years later.

Jean-Antoine Girault¹, Angus C Nairn²

¹Inserm UMR-S 1270, Paris, France; Sorbonne Université, Faculty of Science and Engineering, Paris, France; Institut du Fer à Moulin, Paris, France.

Advances in Pharmacology (San Diego, Calif.)

|March 12, 2021

Summary

This summary is machine-generated.

Dopamine- and cAMP-regulated phosphoprotein (DARPP-32) acts as a key regulator in brain neurons. Phosphorylation at different sites modulates its function, influencing signaling pathways and neuronal responses.

Keywords:

Dopamine Drugs of abuse Phosphorylation Protein kinase Protein phosphatase Schizophrenia Striatum cAMP l-DOPA-induced dyskinesia

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Last Updated: Nov 14, 2025

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Area of Science:

Neuroscience
Molecular Biology
Cell Signaling

Background:

DARPP-32 (PPP1R1B) is a crucial protein in neuronal signaling.
Its distribution parallels dopamine innervation in the brain.
Discovered by Paul Greengard, it elucidates neurotransmitter effects on neurons.

Purpose of the Study:

To investigate the complex regulation and function of DARPP-32.
To understand how DARPP-32 integrates and amplifies neuronal responses.
To explore the role of DARPP-32 in striatal projection neurons.

Main Methods:

Phosphorylation site analysis.
Protein kinase and phosphatase activity assays.
Computational modeling of signaling pathways.

Main Results:

DARPP-32 is phosphorylated at multiple sites (Thr34, Thr75, serine residues) by various kinases (PKA, Cdk5, CK1, CK2).
Phosphorylation at Thr34 inhibits protein phosphatase 1 (PP1).
Phosphorylation at Thr75 inhibits cAMP-dependent protein kinase (PKA).
Serine phosphorylation affects localization and sensitivity to enzymes.
Signaling pathways involving DARPP-32 exhibit robustness and bistability.

Conclusions:

DARPP-32's function is complex, modulated by multiple phosphorylation events.
It acts as a critical signaling hub in striatal projection neurons.
DARPP-32 contributes to the unique properties and physiological functions of these neurons.