Ontology highlight
ABSTRACT:
SUBMITTER: Czyzyk DJ
PROVIDER: S-EPMC3263931 | biostudies-literature | 2011 Dec
REPOSITORIES: biostudies-literature
Czyzyk Daniel J DJ Liu Cassie C Taylor Erika A EA
Biochemistry 20111115 49
Heptosyltransferase I (HepI) is responsible for the transfer of l-glycero-d-manno-heptose to a 3-deoxy-α-D-oct-2-ulopyranosonic acid (Kdo) of the growing core region of lipopolysaccharide (LPS). The catalytic efficiency of HepI with the fully deacylated analogue of Escherichia coli HepI LipidA is 12-fold greater than with the fully acylated substrate, with a k(cat)/K(m) of 2.7 × 10(6) M(-1) s(-1), compared to a value of 2.2 × 10(5) M(-1) s(-1) for the Kdo(2)-LipidA substrate. Not only is this is ...[more]