Autochaperone

In molecular biology, autotransporter proteins are proteins secreted out the Gram-negative bacteria. These beta helixes require a domain which is called the intramolecular autochaperone domain. It shows similarities with other intramolecular chaperone sequences and has a folding-associated function. This increases the efficiency, either by stabilizing the beta-barrel, or by promoting the folding of the passenger domain.

The autochaperone domain is usually located between the HSF and the passenger domain. When the passenger domain is translocated, starting with its C terminus, the autochaperone domain is first out. This would result in the formation of a hairpin structure.

• Pharmacological chaperone
• Protein domain

• [1] Surface display of proteins by Gram-negative bacterial autotransporters
• [2] Adhesion mediated by autotransporters of Gram-negative bacteria: Structural and functional features
• [3] Identification of Secretion Determinants of the Bordetella pertussis BrkA Autotransporter

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