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Why do proteins have specific shapes and what causes that?

Why do proteins have specific shapes and what causes that?

Each protein has its own unique sequence of amino acids and the interactions between these amino acids create a specify shape. This shape determines the protein’s function, from digesting protein in the stomach to carrying oxygen in the blood.

What determines the specific structure of a protein?

The primary structure of a protein refers to the sequence of amino acids in the polypeptide chain. The primary structure of a protein is determined by the gene corresponding to the protein. A specific sequence of nucleotides in DNA is transcribed into mRNA, which is read by the ribosome in a process called translation.

What helps proteins keep their shape?

Hydrogen bonds
Hydrogen bonds in a protein molecule. Large numbers of hydrogen bonds form between adjacent regions of the folded polypeptide chain and help stabilize its three-dimensional shape.

What causes changes in protein structure claim and evidence?

The unique sequence for every protein is ultimately determined by the gene encoding the protein. A change in nucleotide sequence of the gene’s coding region may lead to a different amino acid being added to the growing polypeptide chain, causing a change in protein structure and function.

What gives a protein its unique shape quizlet?

The amino acid sequence causes the polypeptide to assume a particular shape. The shape of a protein determines its specific function.

How are the shape and structure of proteins determined?

The protein depicted is a portion of the enzyme lysozyme, and the hydrogen (more…) As a result of all of these interactions, each type of protein has a particular three-dimensional structure, which is determined by the order of the amino acids in its chain.

Why does denaturation of a protein cause a random shape?

Denaturation disrupts the normal alpha-helix and beta sheets in a protein and uncoils it into a random shape. Denaturation occurs because the bonding interactions responsible for the secondary structure (hydrogen bonds to amides) and tertiary structure are disrupted.

How does hydrogen bonding affect the structure of a protein?

Hydrogen bonding in the polypeptide chain and between amino acid “R” groups helps to stabilize protein structure by holding the protein in the shape established by the hydrophobic interactions. Due to protein folding, ionic bonding can occur between the positively and negatively charged “R” groups that come in close contact with one another.

How does folding affect the structure of a protein?

Folding can also result in covalent bonding between the “R” groups of cysteine amino acids. This type of bonding forms what is called a disulfide bridge. Interactions called van der Waals forces also assist in the stabilization of protein structure.