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Chapitre 5

Structure des protéines

Que sont les protéines ?
Que sont les protéines ?
Proteins are polymers of amino acids linked together by peptide bonds. Proteins and polypeptides are interchangeably used to refer to long chains of amino ...
Organisation des protéines
Organisation des protéines
Proteins are polymers of amino acid residues. They are versatile and responsible for different cellular functions, including DNA replication, molecular ...
Repliement des protéines
Repliement des protéines
Proteins are chains of amino acids linked together by peptide bonds. Upon synthesis, a protein folds into a three-dimensional conformation, critical to ...
Familles de protéines
Familles de protéines
Protein families are groups of homologous proteins; that is, they have similarities in amino acid sequences and three-dimensional structures. Protein ...
Conservation des domaines protéiques
Conservation des domaines protéiques
Protein domains are small structurally independent units that are part of a single amino acid chain.  Although these domains are often structurally ...
Protéines fibreuses et globulaires
Protéines fibreuses et globulaires
Many proteins can be classified into two distinct subtypes - globular or fibrous. These two types differ in their shapes and solubilities. Globular ...
Protéines intrinsèquement désordonnées
Protéines intrinsèquement désordonnées
Intrinsically disordered proteins are a group of proteins that do not fold into specific three-dimensional structures. Their structural flexibility allows ...
Complexe d'assemblage protéique
Complexe d'assemblage protéique
Proteins can form homomeric complexes with another unit of the same protein or heteromeric complexes with different types.  Most protein complexes ...
Protéines conjuguées
Protéines conjuguées
Simple proteins and protein complexes contain only amino acids. In contrast, many other proteins, called conjugated proteins, covalently bond with ...
Substance amyloïde
Substance amyloïde
Amyloid fibrils are aggregates of misfolded proteins.  Under most circumstances, misfolded proteins are either refolded by chaperone proteins or ...
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