title: Helicobacter pylori acyl carrier protein: expression, purification, and its interaction with beta-hydroxyacyl-ACP dehydratase.
abstract: Acyl carrier protein (ACP) is an essential component in the type II fatty acid biosynthesis (FAS II) process and is responsible for the acyl group transfer within a series of related enzymes. In this work, the ACP from Helicobacter pylori strain SS1 was cloned and the gene sequence of Hpacp was deposited in the GenBank database (Accession No.: AY904356). Two forms of HpACP (apo, holo) were successfully purified and characterized. The thermal stability of these two forms was quantitatively investigated by CD spectral analyses. The results revealed that the holo-HpACP was more stable than apo-HpACP according to the transition midpoint temperature(Tm). Moreover, the interaction of HpACP with the related enzyme (beta-hydroxyacyl-ACP dehydratase, HpFabZ) was determined by GST-pull down assay and surface plasmon resonance (SPR) technique in vitro, the results showed that HpACP displays a strong binding affinity to HpFabZ (KD=1.2 x 10(-8)M). This current work is hoped to supply useful information for better understanding the ACP features of Helicobacter pylori SS1 strain.
authors.affiliation: Drug Discovery and Design Center, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai 201203, China.
authors.forename: Weizhi
authors.initials: W
authors.lastname: Liu
authors.forename: Li
authors.initials: L
authors.lastname: Du
authors.forename: Liang
authors.initials: L
authors.lastname: Zhang
authors.forename: Jing
authors.initials: J
authors.lastname: Chen
authors.forename: Xu
authors.initials: X
authors.lastname: Shen
authors.forename: Hualiang
authors.initials: H
authors.lastname: Jiang
mesh_terms: D000213:Acyl Carrier Protein / Q000235:genetics* / Q000302:isolation & purification / Q000378:metabolism*; D000595:Amino Acid Sequence; D000818:Animals; D001426:Bacterial Proteins / Q000235:genetics / Q000302:isolation & purification / Q000378:metabolism; D001483:Base Sequence; D002942:Circular Dichroism; D003001:Cloning, Molecular; D017931:DNA Primers; D016480:Helicobacter pylori / Q000235:genetics / Q000378:metabolism*; D006836:Hydro-Lyases / Q000378:metabolism*; D007700:Kinetics; D008969:Molecular Sequence Data; D011489:Protein Denaturation; D011994:Recombinant Proteins / Q000302:isolation & purification / Q000378:metabolism; D016415:Sequence Alignment; D017386:Sequence Homology, Amino Acid; D013816:Thermodynamics
chemical_list: D000213:Acyl Carrier Protein; D001426:Bacterial Proteins; D017931:DNA Primers; D011994:Recombinant Proteins; D006836:Hydro-Lyases; C036180:beta-hydroxyacyl-(acyl-carrier-protein)dehydrase