Sec dependent and sec independent assembly of E. coli inner membrane proteins: the topological rules depend on chain length.
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چکیده
منابع مشابه
Sec- and Tat-dependent translocation of beta-lactamases across the Escherichia coli inner membrane.
beta-Lactamases represent the major resistance mechanism of gram-negative bacteria against beta-lactam antibiotics. The amino acid sequences of these proteins vary widely, but all are located in the periplasm of bacteria. In this study, we investigated the translocation mechanism of representative beta-lactamases in an Escherichia coli model. N-terminal signal sequence analyses, antibiotic acti...
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YidC is a recently discovered bacterial membrane protein that is related to the mitochondrial Oxa1p and the Alb3 protein of chloroplasts. These proteins are required in the membrane integration process of newly synthesized proteins that do not require the classical Sec machinery. Here we demonstrate that YidC is sufficient for the membrane integration of a Sec-independent protein. Microgram amo...
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We have examined the effects of thermosensitive mutations in secA and secY (prlA) genes on the export of proteins to the three layers of the Escherichia coli cell surface. After several hours at the nonpermissive temperature, the export of two major outer membrane proteins, lipoprotein and OmpA, is delayed, then essentially blocked, in either a secA or secY strain. These mutations also have a s...
متن کاملCharacterization of Sec-translocon-dependent extracytoplasmic proteins of Rickettsia typhi.
As obligate intracellular, vector-borne bacteria, rickettsiae must adapt to both mammalian and arthropod host cell environments. Deciphering the molecular mechanisms of the interactions between rickettsiae and their host cells has largely been hindered by the genetic intractability of these organisms; however, research in other gram-negative pathogens has demonstrated that many bacterial determ...
متن کاملSEC-Translocon Dependent Extracytoplasmic Proteins of Candidatus Liberibacter asiaticus
Citrus Huanglongbing (HLB) is the most destructive citrus disease worldwide. HLB is associated with three species of the phloem-limited, gram-negative, fastidious α-proteobacteria: Candidatus Liberibacter asiaticus (Las), Ca. L. americanus (Lam), and Ca. L. africanus (Laf) with Las being the most widespread species. Las has not been cultured in artificial media, which has greatly hampered our e...
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ژورنال
عنوان ژورنال: The EMBO Journal
سال: 1993
ISSN: 0261-4189
DOI: 10.1002/j.1460-2075.1993.tb05702.x