<p>A variety of bacterial transferases contain a repeat structure composed of tandem repeats of a [LIV]-G-X(4) hexapeptide, which, in the tertiary structure of LpxA (UDP N-acetylglucosamine acyltransferase) [<cite idref="PUB00005215"/>], has been shown to form a left-handed parallel beta helix. A number of different transferase protein families contain this repeat, such as galactoside acetyltransferase-like proteins [<cite idref="PUB00013969"/>], the gamma-class of carbonic anhydrases [<cite idref="PUB00013970"/>], and tetrahydrodipicolinate-N-succinlytransferases (DapD), the latter containing an extra N-terminal 3-helical domain [<cite idref="PUB00013971"/>].</p><p>The signature pattern of this entry represents a fourfold repeat of the a [LIV]-G-x(4) hexapeptide.</p>