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1.B.75 The DUF481 Putative Beta Barrel Porin (DUF481) Family

The DUF481 family consists of large numbers of proteins from a wide range of Gram-negative bacteria.  These proteins are of about 230 - 260 aas, but some are longer due to hydrophilic extensions.  These proteins have an N-terminal signal sequence as well as 10 - 12 putative TM β-strands.  An E. coli K12 member of the family is YdiY. These proteins probably belong to the: Outer Membrane Pore-forming Protein I (OMPP-I) Superfamily, but this suggestion has not been rigorously substantiated.

References associated with 1.B.75 family:

Stancik, L.M., D.M. Stancik, B. Schmidt, D.M. Barnhart, Y.N. Yoncheva, and J.L. Slonczewski. (2002). pH-dependent expression of periplasmic proteins and amino acid catabolism in Escherichia coli. J. Bacteriol. 184: 4246-4258. 12107143