TCDB is operated by the Saier Lab Bioinformatics Group

9.B.153 The Putative Beta-Barrel Porin/Alpha Amylase (BBP/AA) Family

The BBP/AA family consists of proteins predicted to consist of outer membane beta-barrels. However they are annotated in the NCBI protein database as the DUF1551 or PF04314 family, alpha-amylase catalytic proteins, members of the Phenol_MetA-deg (MetA-pathway of phenol degradation) superfamily, signal peptide proteins and porins. These proteins are numerous and present in a wide range of Gram-negative bacteria. Some have C-terminal peptidoglycan-binding OmpA-like domains as well as other domains, and have sizes that can be as small as 300 aas and as large as 900 aas.