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The Anti-Inflammatory Protein TNIP1 Is Intrinsically Disordered with Structural Flexibility Contributed by Its

Rambon Shamilov1, Olga Vinogradova2, Brian J Aneskievich2

  • 1Graduate Program in Pharmacology and Toxicology, Department of Pharmaceutical Sciences, University of Connecticut, Storrs, CT 06269, USA.

Biomolecules
|November 13, 2020
PubMed
Summary
This summary is machine-generated.

TNFAIP3 interacting protein 1 (TNIP1) is structurally flexible, particularly its anti-inflammatory AHD1-UBAN domain. This intrinsic disorder may explain TNIP1’s diverse roles in chronic inflammatory diseases.

Keywords:
ABIN-1NMRintrinsically disordered regionslinear motifsnatively unfolded protein

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Area of Science:

  • Biophysics
  • Molecular Biology
  • Structural Biology

Background:

  • TNFAIP3 interacting protein 1 (TNIP1) is crucial for cellular processes and linked to chronic inflammatory disorders.
  • Its conformational flexibility and role in protein interactions remain under-investigated.
  • Hub proteins, like TNIP1, often exhibit intrinsically disordered characteristics.

Purpose of the Study:

  • To investigate the structural flexibility and conformational states of TNIP1 and its AHD1-UBAN domain in solution.
  • To explore how intrinsic disorder in TNIP1 influences its function and interactions.

Main Methods:

  • In silico assessments for intrinsically disordered regions.
  • Multiple biophysical techniques to analyze protein structure and flexibility.
  • Characterization of the AHD1-UBAN domain's solution behavior.

Main Results:

  • TNIP1 and its AHD1-UBAN domain exhibit significant structural flexibility in solution.
  • The AHD1-UBAN domain exists as a pre-molten globule with limited secondary structure.
  • The AHD1-UBAN domain is predominantly monomeric but can oligomerize under specific conditions.

Conclusions:

  • The intrinsic disorder of TNIP1, especially within the AHD1-UBAN domain, is likely key to its multifaceted roles.
  • Findings suggest the crystallized UBAN conformation is one of several possible solution states.
  • Understanding TNIP1's conformational dynamics offers insights into its involvement in inflammatory diseases.