RESEARCH: AAA-PROTEIN-SUPERFAMILY
FOLDING PROJECT #19317 PROFILE

This project studies how Rubisco activase (Rca), a protein important for plant growth, uses energy from ATP to change shape and perform its job. Scientists will use computer simulations to understand how Rca binds to ATP and ADP and identify key parts of the protein involved in this process.

Atomistic insights into AAA+ protein superfamily ATPases Associated with diverse cellular Activities (AAA+) comprise a superfamily of proteins that perform a large variety of functions essential to cell physiology, including control of protein homeostasis, DNA replication, recombination, chromatin remodeling, ribosomal RNA processing, molecular targeting, organelle biogenesis, and membrane fusion.

Members of this superfamily are defined by the presence of what is termed the AAA+ domain containing the canonical Walker A and B motifs required for ATP binding and hydrolysis.

Typically, genomes encode approximately ten to several hundred AAA+ family members, each of which is thought to be adapted to specific functional niches that necessitate precise mechanisms of substrate recognition and processing.

The striking adaptive radiation of AAA+ proteins to operate in diverse settings illustrates the versatile utility of the AAA+ domain.

AAA+ proteins typically form hexameric complexes and act as motors to remodel other proteins, DNA/RNA, or multicomponent complexes.

Indeed, many chaperones and ATP-dependent proteases are or have subunits that belong to this superfamily.

Rubisco activase (Rca) belongs to the AAA+ superfamily of proteins and it hydrolyzes ATP to ADP.

The complementarity of nucleotide-binding sites between AAA+ interfaces, the mechanism of ATP hydrolysis and the conformational changes activating or deactivating their ATP-binding pocket ensure a functional cycle that creates mechanical force to promote remodeling of substrates.

In this study, we will investigated the ADP/ATP and Mg2+ ion binding mechanism in Rca monomer and homodimers using extensive longtime scale simulations.

We will also try to find the binding pathway for ADP and ATP.

Simulations will also helps to predicts the crucial residues that involved in this binding process.

AAA+

ATPases Associated with diverse cellular Activities

AAA+ proteins are a large family of enzymes that use energy from ATP to perform various cellular tasks, such as protein folding, DNA repair, and membrane fusion. They are essential for many biological processes and are found in all living organisms.

ATPase

An enzyme that hydrolyzes ATP to ADP, releasing energy.

ATPases are enzymes that break down adenosine triphosphate (ATP), a molecule that stores energy in cells. This process releases energy that can be used to power various cellular activities, such as muscle contraction, nerve impulse transmission, and protein synthesis.

Protein

A large biomolecule composed of amino acids linked together in a chain.

Proteins are essential building blocks of all living organisms. They perform a wide range of functions, including catalyzing biochemical reactions, transporting molecules, providing structural support, and regulating cellular processes.

DNA

Deoxyribonucleic acid

DNA is a molecule that carries genetic information. It is composed of two strands of nucleotides wound around each other in a double helix structure. DNA contains the instructions for building and maintaining an organism.

RNA

Ribonucleic acid

RNA is a molecule similar to DNA, but it is single-stranded and plays a role in protein synthesis. It carries genetic information from DNA to ribosomes, where proteins are made.

Simulations

Computer models used to study complex systems.

Simulations are computer programs that mimic real-world processes. In biotechnology, simulations are used to study the behavior of molecules, cells, and organisms.