Functions of the periplasmic loop of the porin MspA from Mycobacterium smegmatis.

Abstract excerpt

MspA is the major porin of Mycobacterium smegmatis and mediates diffusion of small and hydrophilic solutes across the outer membrane. The octameric structure of MspA, its sharply defined constriction zone, and a large periplasmic loop L6 represent novel structural features. L6 consists of 13 amino acids and is directly adjacent to the constriction zone. Deletion of 3, 5, 7, 9, and 11 amino acids of the L6 loop...

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