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Updated: Jun 6, 2026

Perspectives on Neuroscience

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Published on: July 31, 2007

A STEP forward in neural function and degeneration.

Matthew L Baum¹, Pradeep Kurup, Jian Xu

¹Child Study Center; New Haven, CT USA.

Communicative & Integrative Biology

|November 9, 2010

Summary

This summary is machine-generated.

STriatal-Enriched Phosphatase (STEP) impacts synaptic plasticity and neurodegeneration. Dysregulated STEP activity in Alzheimer's disease contributes to cognitive deficits, highlighting its role in brain function.

Keywords:

Alzheimer's disease STEP glutamate receptors proteasome tyrosine phosphatase ubiquitination

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Area of Science:

Neuroscience
Molecular Biology
Biochemistry

Background:

STriatal-Enriched Phosphatase (STEP) is a key brain-specific protein tyrosine phosphatase.
STEP regulates synaptic plasticity by dephosphorylating critical signaling proteins and receptors.

Purpose of the Study:

To review the normal regulation of STEP.
To understand how STEP dysregulation contributes to Alzheimer's disease.

Main Methods:

Review of existing literature on STEP function and regulation.
Analysis of STEP's role in synaptic signaling pathways.
Examination of STEP's involvement in neurodegenerative processes.

Main Results:

STEP dephosphorylates and inactivates signaling proteins like ERK1/2, p38, and Fyn.
STEP dephosphorylates AMPAR and NMDAR subunits, promoting receptor internalization.
STEP levels and activity are tightly controlled by multiple regulatory mechanisms.

Conclusions:

Abnormally increased STEP levels and activity in Alzheimer's disease contribute to cognitive impairments.
Understanding STEP regulation is crucial for developing therapeutic strategies for neurodegenerative diseases.