Abstract
Proteins from 24 halophilic bacteria, including Haloarcula marismortui, Haloarcula vallismortis, Haloferax mediteranei, Haloferax gibbonsii, Halobacterium salinarium, as well as unknown isolates from Enid, Oklahoma; Jefferson Island, Louisiana; and the Salado Formation-New Mexico, were analyzed by one-dimensional SDS-polyacrylamide gel electrophoresis (SDS-PAGE). Their protein profiles were compared, and the bacteria were grouped according to the Statistical Analysis System (SAS Institute, Cary, North Carolina) on an IBM 4316 computer. The groupings made from protein profiles showed agreement with groupings made from DNA reassociation data. The various known halophiles were easily separated into the three main halobacterial genera. The data show that one-dimensional SDS-PAGE can be easily used to rapidly screen large numbers of unknown strains to group them into related clusters. This technique offers a way to reduce the total number of halophilic isolates being studied in large taxonomic research programs.
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