RESEARCH: MG2-ION-BINDING
FOLDING PROJECT #19307 PROFILE

This project looks at how Rubisco activase (Rca), a protein that helps plants make food, uses energy from ATP to change shape and do its job. Scientists will use computer simulations to figure out how Rca binds to ATP and ADP, and which parts of the protein are important for this process.

Note: This TLDR is a simplication and may not be 100% accurate.

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.

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AAA+ protein superfamily

A large family of proteins involved in cellular processes.

AAA+ protein superfamily are essential proteins found in all living organisms. They perform various functions like DNA replication, protein breakdown, and cell division. These proteins use energy from ATP to carry out their tasks.

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ATPases

Enzymes that break down ATP to release energy.

ATPases are enzymes crucial for cellular function. They break down ATP, a molecule storing energy, releasing it for various processes like muscle contraction and nerve impulses.

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Walker A and B motifs

Structural elements in ATPases required for ATP binding and hydrolysis.

Walker A and B motifs are specific protein sequences found within ATPase enzymes. They are essential for the enzyme's ability to bind and break down ATP, providing energy for cellular processes.

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Rubisco activase (Rca)

ATP-dependent enzyme that activates Rubisco.

Rubisco activase (Rca) is a crucial protein in plants. It helps activate Rubisco, the enzyme responsible for capturing carbon dioxide during photosynthesis.

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ADP

Adenosine diphosphate.

ADP is a molecule involved in energy transfer within cells. It's produced when ATP releases energy and is used to create ATP again.

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ATP

Adenosine triphosphate.

ATP is the primary energy currency of cells. It stores energy released from food and provides it for various cellular activities.

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Mg2+

Magnesium ion.

Mg2+ is a positively charged magnesium ion essential for various biological processes, including enzyme activity and DNA replication.