2. Protein Interactions a. What types of molecules does your protein interact wi

Question

2. Protein Interactions a. What types of molecules does your protein interact with? If it's an enzyme, what does it put together or take apart? If not an enzyme, what molecules does it interact with? Does your protein interact with any other proteins? List those as well What are the important factors in a protein being able to interact with the molecule it does? Why would two proteins or two molecules ever come together in water? How do you think your protein interacts with the molecule it does? b. c.

Explanation / Answer

Proteins are large bio molecules or macromolecules consisting of oneeor more long chains of amino acid residue. Proteins perform a wide range of functions within an organism including catalysing metabolic reactions, DNA replication, etc.

The chief characteristics of proteins that also allows this diverse set of functions is their ability to bind to other molecules specifically and tightly.

The region of protein responsible for binding is called binding site and is a depression or pocket. Protein binding can be extraordinarily tight and specific.

Proteins can bind to other proteins as well as to small molecular substrate. When proteins bind specifically to other copies of the same molecule they can oligomerize to form fibrils.

Protein protein interactions also regulate enzymatic activity, control progressive, through thr cell cycle, and allow the assembly of large protein complex that carry out many closely related reactions with a common biological function. As interaction between proteins are reversible and depend heavily on availability of different groups of partner protein.

Some listed protein protein interactions are:

Electron transfer proteins

Signal transduction

Transport across membranes

Cell metabolism

Muscle contractions

Protein can also act as enzymes to catalyse chemical reactions as well as bind with enzyme. Enzymes are usually highly specific and accelerate only one or a few chemical reactions. Enzymes carry out most of the reactions involved in metabolism, as well as manipulating DNA.

Some enzymes act in other protein to add or remove chemical groups in a process known as post transational modification.

The biological properties of protein molecules depend on its physical interactions with other molecules. The enzyme hexakinase binds glucose and ATP so as to catalyse a reaction between them, actin molecules bind to each other to assemble into actin filamen.

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