Homology search techniques based on the iterative PSI-BLAST method in
combination with various filters for low sequence complexity are appli
ed to assign folds to all Mycoplasma genitalium proteins. The resultin
g procedure (implemented as a web server) is able to predict at least
one domain in 37% of these proteins automatically, with an estimated a
ccuracy higher than 98%. Taking structural features such as coiled coi
l or transmembrane regions aside, folds can be assigned to more than h
alf of the globular proteins in a bacterium just by iterative sequence
comparison. (C) 1998 Academic Press.