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Crocodylian nuclear factor kappa B.

Mark Merchant1, Vasileios Morkotinis1, Amber Hale2

  • 1Department of Chemistry, McNeese State University, Lake Charles, LA, USA.

Comparative Biochemistry and Physiology. Part B, Biochemistry & Molecular Biology
|August 2, 2017
PubMed
Summary
This summary is machine-generated.

Researchers analyzed the nuclear factor kappa B (NFκB) protein in alligators, crocodiles, and gharials. This vital immune and developmental protein is highly conserved across these species.

Keywords:
AlligatoridCrocodilianCrocodylidGavialidImmune responseNF-κB1NFkBNFκB105Relp50

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Area of Science:

  • Comparative genomics
  • Molecular biology
  • Immunology

Background:

  • Nuclear factor kappa B (NFκB) is crucial for immune responses, development, and apoptosis.
  • Understanding NFκB evolution and function in diverse species like crocodilians provides insights into vertebrate immunity.

Purpose of the Study:

  • To deduce and analyze the amino acid sequence of the NFκB protein in three crocodilian species.
  • To compare the conservation of NFκB across different vertebrate classes.
  • To investigate the structural features and potential functional domains of crocodilian NFκB.

Main Methods:

  • Genomic data analysis to deduce amino acid sequences.
  • Bioinformatic analysis to identify conserved domains and functional regions.
  • Western blot analysis to confirm protein expression and localization in American alligator liver.

Main Results:

  • The amino acid sequences of NFκB1 in American alligator, estuarine crocodile, and Indian gharial were determined.
  • Crocodilian NFκB shares high sequence identity with birds and mammals, indicating strong evolutionary conservation.
  • Key functional domains, including the Rel homology domain and ankyrin repeats, were identified, suggesting conserved regulatory mechanisms.
  • Western blot confirmed the expression of both precursor (105kDa) and mature (50kDa) NFκB in alligator liver, with altered localization upon infection.

Conclusions:

  • Crocodilian NFκB protein is highly conserved, particularly its functional domains essential for immune and developmental regulation.
  • The findings highlight the evolutionary stability of NFκB signaling pathways in vertebrates.
  • NFκB plays a significant role in the immune response of crocodilians, as evidenced by its expression and dynamic localization.