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Cloning, characterization and subcellular localization of Nuclear LIM interactor interacting factor gene from
1Confocal Imaging, Sophisticated Instrumentation Facility, IIT Indore, Khandwa Road, Simrol, 453552, MP, India.
Insights
Researchers identified a novel nuclear LIM interactor-interacting factor (NLI) in Leishmania donovani, the parasite causing Indian Kala-azar. This protein localizes to the nucleus and kinetoplast, suggesting a role in parasite gene regulation.
Area of Science:
- Parasitology
- Molecular Biology
- Genetics
Background:
- LIM domains are crucial zinc-binding motifs mediating protein-protein interactions in various cellular proteins.
- Nuclear LIM domain proteins regulate diverse functions, including transcription, gene regulation, and cell fate.
- Nuclear LIM domain interacting proteins have not been previously identified in protozoan parasites like Leishmania.
Purpose of the Study:
- To clone, characterize, and determine the subcellular localization of a nuclear LIM interactor-interacting factor (NLI)-like protein from Leishmania donovani.
- To investigate the evolutionary distinctiveness of the identified Leishmania NLI (LdNLI).
Main Methods:
- Cloning and primary sequence analysis of the LdNLI gene.
- Phylogenetic analysis to determine evolutionary relationships.
- Subcellular localization studies using microscopy.
Main Results:
- The LdNLI protein exhibits characteristic features of nuclear LIM interactor-interacting factors.
- Phylogenetic analysis places LdNLI within a distinct kinetoplastid group.
- LdNLI was found to be discretely localized in the nucleus and kinetoplast of Leishmania donovani.
Conclusions:
- Leishmania donovani possesses a unique NLI-like protein.
- The nuclear and kinetoplast localization suggests a potential role for LdNLI in parasite gene expression regulation.
Abstract:
LIM domains are zinc-binding motifs that mediate protein-protein interactions and are found in a wide variety of cytoplasmic and nuclear proteins. The nuclear LIM domain family members have a number of different functions including transcription factors, gene regulation, cell fate determination, organization of the cytoskeleton and tumour formation exerting their function through various LIM domain interacting protein partners/cofactors. Nuclear LIM domain interacting proteins/factors have not been reported in any protozoan parasites including Leishmania. Here, we report for the first time cloning, characterization and subcellular localization of nuclear LIM interactor-interacting factor (NLI) like protein from Leishmania donovani, the causative agent of Indian Kala-azar. Primary sequence analysis of LdNLI revealed presence of characteristic features of nuclear LIM interactor-interacting factor. However, leishmanial NLI represents a distinct kinetoplastid group, clustered in a separate branch of the phylogenic tree. The sub-cellular distribution of LdNLI revealed the discreet localization in nucleus and kinetoplast only, suggesting that the gene may have a role in parasite gene expression.
