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Microtubule Associated Proteins (MAPs)

Microtubule function and architecture are regulated by an array of specialized proteins called microtubule-associated proteins or MAPs. These proteins are widespread across different organisms and have conserved protein motifs, like the multi-TOG domain for tubulin binding found in the CLASP family of MAPs. Some MAPs are lineage-specific based on their conserved domains. Their functions depend upon the cytoskeletal architecture and cell type they are located within. In-plant cells, a specific...
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Microtubule affinity-regulating kinase 4: structure, function, and regulation.

Farha Naz1, Farah Anjum, Asimul Islam

  • 1Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, Jamia Nagar, New Delhi, 110025, India.

Cell Biochemistry and Biophysics
|March 9, 2013
PubMed
Summary
This summary is machine-generated.

Microtubule affinity-regulating kinase 4 (MARK4) plays roles in cell division and neuronal development. Its isoforms, MARK4L and MARK4S, are implicated in cancer and brain function, making MARK4 a drug design target.

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Area of Science:

  • Molecular Biology
  • Cell Biology
  • Biochemistry

Background:

  • Microtubule affinity-regulating kinase 4 (MARK4) is a serine/threonine kinase involved in regulating microtubule dynamics.
  • MARK4 influences critical cellular processes including cell division, polarity, and shape.
  • The MARK4 gene produces two isoforms, MARK4L and MARK4S, with distinct tissue expression and potential functions.

Purpose of the Study:

  • To analyze the sequence, structure, and function of MARK4 isoforms.
  • To elucidate the regulatory mechanisms of microtubule dynamics by MARK4.
  • To provide insights into MARK4-associated diseases for drug design.

Main Methods:

  • Sequence analysis of MARK4 gene and its isoforms.
  • Structural analysis of MARK4 protein domains and active sites.
  • Functional analysis of MARK4 in cellular processes.

Main Results:

  • MARK4 gene encodes two isoforms, MARK4L and MARK4S, with differing C-terminal regions and tissue distribution.
  • MARK4L is upregulated in cancers (hepatocarcinoma, gliomas) and linked to cell cycle regulation.
  • MARK4S is highly expressed in the brain, suggesting a role in neuronal differentiation.

Conclusions:

  • MARK4 isoforms have distinct roles in cellular functions and disease.
  • MARK4's involvement in microtubule dynamics and disease pathogenesis makes it a promising drug target.
  • Understanding MARK4's structure-function relationship is crucial for developing targeted therapies.