Related Experiment Video

Updated: May 18, 2026

An Integrated Approach for Microprotein Identification and Sequence Analysis
09:37

An Integrated Approach for Microprotein Identification and Sequence Analysis

Published on: July 12, 2022

Pleiotropic roles of the Msi1-like protein Msl1 in Cryptococcus neoformans

Dong-Hoon Yang1, Shinae Maeng, Anna K Strain

  • 1Department of Biotechnology, Center for Fungal Pathogenesis, Yonsei University, Seoul, South Korea.

Eukaryotic Cell
|October 9, 2012
PubMed

Insights

Msl1, a protein in the human fungal pathogen Cryptococcus neoformans, regulates key functions including stress response, drug resistance, and virulence. This study reveals Msl1 as a potential novel antifungal therapeutic target.

Area of Science:

  • Mycology
  • Molecular Biology
  • Pathogen Biology

Background:

  • Msi1-like (MSIL) proteins regulate the Ras/cyclic AMP (cAMP) pathway and chromatin assembly.
  • MSIL proteins have not been previously studied in fungal pathogens.
  • Cryptococcus neoformans is a human fungal pathogen causing meningoencephalitis.

Purpose of the Study:

  • To identify and characterize an MSIL protein, Msl1, in Cryptococcus neoformans.
  • To elucidate the pleiotropic roles of Msl1 in C. neoformans.
  • To investigate Msl1's contribution to fungal virulence and identify potential therapeutic targets.

Main Methods:

  • Identification and characterization of the Msl1 protein in C. neoformans.
  • Analysis of Msl1's function in cAMP-dependent and -independent pathways.
  • Assessment of Msl1's role in melanin production, sexual differentiation, thermotolerance, stress responses, and antifungal drug resistance.
  • Transcriptome analysis to identify Msl1-regulated genes.
  • Evaluation of Msl1's contribution to C. neoformans virulence.

Main Results:

  • Msl1 exhibits pleiotropic roles in C. neoformans, affecting both cAMP-dependent and -independent processes.
  • Msl1 negatively controls melanin production and sexual differentiation, influenced by cAMP signaling.
  • Msl1 regulates thermotolerance, stress responses, and antifungal drug resistance independently of Ras/cAMP.
  • Msl1 is essential for the full virulence of C. neoformans.
  • Transcriptome analysis revealed Msl1 regulates stress-related genes like HSP12 and HSP78.

Conclusions:

  • Msl1 plays multifaceted roles in the human fungal pathogen C. neoformans.
  • Msl1's functions are partially dependent on and independent of the cAMP pathway.
  • Msl1 is crucial for C. neoformans virulence, highlighting its potential as an antifungal therapeutic target.

More Related Videos

Biolistic Transformation of a Fluorescent Tagged Gene into the Opportunistic Fungal Pathogen Cryptococcus neoformans07:32

Biolistic Transformation of a Fluorescent Tagged Gene into the Opportunistic Fungal Pathogen Cryptococcus neoformans

Published on: March 19, 2015

The Galleria mellonella Waxworm Infection Model for Disseminated Candidiasis07:33

The Galleria mellonella Waxworm Infection Model for Disseminated Candidiasis

Published on: November 17, 2018

Related Concept Videos

Role of Septins01:02

Role of Septins

Septins are the recently discovered fourth major protein component of the cytoskeleton, along with microfilaments, microtubules, and intermediate filaments. These proteins can associate with other cytoskeletal filaments and carry out varied roles or can be free-floating in the cytoplasm.
Cellular Functions of Septins
Recent studies have revealed the multifaceted roles of septins in various cellular processes such as cytokinesis, ciliogenesis, and neurogenesis. Septins act as scaffolds and...
Mismatch Repair01:20

Mismatch Repair

Organisms are capable of detecting and fixing nucleotide mismatches that occur during DNA replication. This sophisticated process requires identifying the new strand and replacing the erroneous bases with correct nucleotides. Mismatch repair is coordinated by many proteins in both prokaryotes and eukaryotes.
The Mutator Protein Family Plays a Key Role in DNA Mismatch Repair
The human genome has more than 3 billion base pairs of DNA per cell. Prior to cell division, that vast amount of genetic...
M-Cdk Drives Transition Into Mitosis02:15

M-Cdk Drives Transition Into Mitosis

Checkpoints throughout the cell cycle serve as safeguards and gatekeepers, allowing the cell cycle to progress in favorable conditions and slow or halt it in problematic ones. This regulation is known as the cell cycle control system.
Cyclin-dependent kinases, or Cdks, work in concert with cyclins to control cell cycle transitions. M-Cdk, a complex of Cdk1 bound to M cyclin, is a well-known example of this coordinated control that drives the transition from the G2 to the M phase.
M cyclin...
Protein Complexes with Interchangeable Parts01:57

Protein Complexes with Interchangeable Parts

Groups of proteins may form a complex where each protein in this complex has a different role in the overall execution of the complex’s function. Often some of the proteins in the complex can be replaced by a closely related variant to give a complex that contains many of the same components yet is functionally distinct.
The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order to...
Pleiotropy01:33

Pleiotropy

Pleiotropy is the phenomenon in which a single gene impacts multiple, seemingly unrelated phenotypic traits. For example, defects in the SOX10 gene cause Waardenburg Syndrome Type 4, or WS4, which can cause defects in pigmentation, hearing impairments, and an absence of intestinal contractions necessary for elimination. This diversity of phenotypes results from the expression pattern of SOX10 in early embryonic and fetal development. SOX10 is found in neural crest cells that form melanocytes,...
Cohesins02:20

Cohesins

Cohesin protein complexes are a molecular glue that holds two sister chromatids together. They play an important role both in mitosis and meiosis. In mitosis, all cohesin complexes present on the chromosomes are removed before the start of the anaphase stage.
Cohesin complexes in Meiotic Division
Meiosis involves two distinct rounds of chromosomal segregation and cell divisions— Meiosis I followed by Meiosis II – producing four daughter cells. Meiosis I includes the separation of homologous...