Related Experiment Video

Updated: May 23, 2025

Establishment of a High-throughput Setup for Screening Small Molecules That Modulate c-di-GMP Signaling in Pseudomonas aeruginosa
11:31

Establishment of a High-throughput Setup for Screening Small Molecules That Modulate c-di-GMP Signaling in Pseudomonas aeruginosa

Published on: June 30, 2016

8.4K

MecA: A Multifunctional ClpP-Dependent and Independent Regulator in Gram-Positive Bacteria

Zezhang T Wen1,2, Kassapa Ellepola3, Hui Wu4

  • 1Department of Oral and Craniofacial Biology, School of Dentistry, Louisiana State University Health Sciences Center, New Orleans, Louisiana, USA.

Molecular Microbiology
|March 12, 2025
PubMed

Insights

MecA protein acts as a bacterial adaptor, targeting proteins for degradation via ClpCP protease complexes. Emerging research reveals MecA also regulates protein function independently of proteolysis, impacting cellular homeostasis.

Area of Science:

  • Microbiology
  • Molecular Biology
  • Biochemistry

Background:

  • MecA is a conserved adaptor protein in Gram-positive bacteria.
  • It mediates target protein recognition and degradation by ClpCP protease complexes.
  • MecA delivers substrates to ClpC ATPase for unfolding and translocation into the ClpP protease barrel.

Purpose of the Study:

  • To investigate the role of MecA in protein degradation.
  • To explore the ClpP-independent functions of MecA.
  • To understand the regulatory mechanisms of MecA.

Main Methods:

  • Protein-protein interaction studies.
  • In vitro degradation assays.
  • Analysis of MecA's effect on target protein function.

Main Results:

  • MecA facilitates the degradation of specific bacterial proteins by the ClpCP system.
  • MecA exhibits ClpP-independent regulatory roles on target proteins.
  • These roles affect key enzymes and transcriptional factors in metabolic pathways.

Conclusions:

  • MecA is a crucial regulator of protein homeostasis in bacteria.
  • Its functions extend beyond proteolysis, influencing diverse cellular processes.
  • Further research is needed to elucidate the mechanisms of ClpP-independent MecA regulation.
Keywords:
Streptococcus mutansClpPMecAgene expressionregulated proteolysis

More Related Videos

A Fluorescence-based Method to Study Bacterial Gene Regulation in Infected Tissues07:10

A Fluorescence-based Method to Study Bacterial Gene Regulation in Infected Tissues

Published on: February 19, 2019

8.8K
Functional Complementation Analysis FCA: A Laboratory Exercise Designed and Implemented to Supplement the Teaching of Biochemical Pathways09:27

Functional Complementation Analysis FCA: A Laboratory Exercise Designed and Implemented to Supplement the Teaching of Biochemical Pathways

Published on: June 24, 2016

17.6K

Related Concept Videos

Prokaryotic Transcriptional Activators and Repressors01:58

Prokaryotic Transcriptional Activators and Repressors

The organization of prokaryotic genes in their genome is notably different from that of eukaryotes. Prokaryotic genes are organized, such that the genes for proteins involved in the same biochemical process or function are located together in groups. This group of genes, along with their regulatory elements, are collectively known as an operon. The functional genes in an operon are transcribed together to give a single strand of mRNA known as polycistronic mRNA.
Transcription of prokaryotic...
20.6K
Bacterial RNA Polymerase00:43

Bacterial RNA Polymerase

Unlike eukaryotes, bacteria use a single RNA Polymerase (RNAP) to transcribe all genes. The different subunits of bacterial RNAPhave distinct functions. The multisubunit structure of the bacterial RNAP helps the enzyme to maintain catalytic function, facilitate assembly, interact with DNA and RNA, and self-regulate its activity.
In most genes, the transcription site is a single base present upstream of the coding sequence. Though RNAP is a catalytically efficient enzyme, it does not recognize...
28.4K
Operons02:09

Operons

Prokaryotes can control gene expression through operons—DNA sequences consisting of regulatory elements and clustered, functionally related protein-coding genes. Operons use a single promoter sequence to initiate transcription of a gene cluster (i.e., a group of structural genes) into a single mRNA molecule. The terminator sequence ends transcription. An operator sequence, located between the promoter and structural genes, prohibits the operon’s transcriptional activity if bound by...
48.5K
Cytoskeletal Proteins in Bacteria01:29

Cytoskeletal Proteins in Bacteria

Bacterial cells were initially considered simple, randomly organized structures lacking a cytoskeleton. However, the discovery of cytoskeleton homologs in bacteria led to the change of this opinion. Bacterial cytoskeletal filaments regulate the cell shape, cell polarity, cell division, and partitioning of plasmids during cell division. It was later discovered that bacterial cytoskeletal proteins, mainly actin and tubulin homologs, are diverse compared to their eukaryotic counterparts. On the...
3.2K
Bacterial Signaling01:30

Bacterial Signaling

Bacterial signaling can occur within bacteria (intracellular) or between bacteria (intercellular). At times, a group of bacteria behaves like a community. To achieve this, they engage in quorum sensing, the perception of higher cell density that causes changes in gene expression. Quorum sensing involves both extracellular and intracellular signaling. The signaling cascade starts with a molecule called an autoinducer (AI). Individual bacteria produce AIs that move out of the bacterial cell...
31.3K
Types of RNA01:23

Types of RNA

Overview
Three main types of RNA are involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). These RNAs perform diverse functions and can be broadly classified as protein-coding or non-coding RNA. Non-coding RNAs play important roles in the regulation of gene expression in response to developmental and environmental changes. Non-coding RNAs in prokaryotes can be manipulated to develop more effective antibacterial drugs for human or animal use.
RNA...
63.0K