Porin and porin-associated protein (PAP) of Rhodospirillum rubrum FR1

Article Abstract:

The complex formation between porin and porin-associated protein (PAP) of the gram-negative bacteria Rhodospirillum rubrum FR1 stabilizes the outer membrane. The stability is due to increase in the stability of porin and membrane peptidoglycan binding. The complex contains porin in the trimeric form and has a beta-sheet structure. PAP has no channel forming activity as the membrane conductance of the porin-PAP complex is similar to the porin channels. The binding of PAP to porin requires divalent cations.

Membrane proteins

---

Immunochemical structure of the OmpD porin from Salmonella typhimurium

Article Abstract:

The structure of Salmonella typhimurium SH 7454 OmpD porin was analyzed by utilizing cyanogen bromide digestion and subsequent amino acid sequencing of the protein fragments. The OmpD porin of Salmonella typhimurium strain SH 7454 is composed of 96 protein residues and exhibits an amino acid sequence that is 75% similar to the NmpC, Lc and OmpC porins of Escherichia coli. Furthermore, the OmpD porin is 68% homologous to the OmpC porin of Salmonella typhimurium.

Salmonella typhimurium, Immunochemistry

---

Lipopolysaccharide and porin of Roseobacter denitrificans, confirming its phylogenetic relationship to the alpha-3 subgroup of proteobacteria

Article Abstract:

Treatment of the major porin of Roseobacter denitrificans with EDTA causes dissociation of the oligomers into monomers. The 12 N-terminal amino acids of the monomers display sequence homology with the porins of Rhodobacter (R)capsulatus, R. spheroids and Rhodopseudomonas blastica. On the basis of these characteristics, Roseobacter dentrificans might be renamed Rhodobacter dentrificans.

Bacterial genetics, Endotoxins, Proteins, Phylogeny

Similar abstracts:

• Abstracts: Molecular cytogenetic analysis and resequencing of contactin associated protein-like 2 in autism spectrum disorders
• Abstracts: The TNF receptor 1-associated protein TRADD signals cell death and NF-kappaB activation. TRADD-TRAF2 and TRADD-FADD interactions define two distinct TNF receptor 1 signal transduction pathways
• Abstracts: Direct evidence for the involvement of extracellular proteins in the adhesion of Azospirillum brasilense. Glycosylation of the flagellin of the polar flagellum of Azospirillum brasilense, a gram-negative nitrogen-fixing bacterium
• Abstracts: A theoretical and empirical investigation of the invasion dynamics of colicinogeny. Can phage defence maintain colicin plasmids in Escherichia coli?
• Abstracts: Purification and properties of an ATP-dependent nucleosome remodeling factor. ISWI, a member of the SW12/SNF2 ATPase family, encodes the 140 kDa subunit of the nucleosome remodelling factor

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.