title: Role of CCAA nucleotide repeats in regulation of hemoglobin and hemoglobin-haptoglobin binding protein genes of Haemophilus influenzae.
abstract: Haemophilus influenzae utilizes hemoglobin and hemoglobin-haptoglobin as heme sources. The H. influenzae hemoglobin- and hemoglobin-haptoglobin binding protein genes, hgpA, hgpB, and hgpC, contain lengths of tetrameric CCAA repeats. Using an hgpA-lacZ translational gene fusion, we demonstrate phase-variable expression of lacZ associated with alteration in the length of the CCAA repeat region.
authors.affiliation: Departments of Pediatrics, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma 73104, USA.
authors.forename: Z
authors.initials: Z
authors.lastname: Ren
authors.forename: H
authors.initials: H
authors.lastname: Jin
authors.forename: P W
authors.initials: PW
authors.lastname: Whitby
authors.forename: D J
authors.initials: DJ
authors.lastname: Morton
authors.forename: T L
authors.initials: TL
authors.lastname: Stull
mesh_terms: D001425:Bacterial Outer Membrane Proteins / Q000096:biosynthesis / Q000235:genetics*; D001426:Bacterial Proteins; D001483:Base Sequence; D002352:Carrier Proteins / Q000096:biosynthesis / Q000235:genetics*; D017931:DNA Primers; D015964:Gene Expression Regulation, Bacterial; D005798:Genes, Bacterial; D006193:Haemophilus influenzae / Q000235:genetics*; D006242:Haptoglobins / Q000378:metabolism*; D006454:Hemoglobins / Q000378:metabolism*; D018895:Microsatellite Repeats / Q000235:genetics*; D008969:Molecular Sequence Data; D014176:Protein Biosynthesis; D011993:Recombinant Fusion Proteins / Q000096:biosynthesis; D015183:Restriction Mapping; D001616:beta-Galactosidase / Q000235:genetics
chemical_list: D001425:Bacterial Outer Membrane Proteins; D001426:Bacterial Proteins; D002352:Carrier Proteins; D017931:DNA Primers; D006242:Haptoglobins; D006454:Hemoglobins; C119573:HgpC protein, Haemophilus influenzae; D011993:Recombinant Fusion Proteins; C035492:haptoglobin-hemoglobin complex; C017206:hemoglobin-binding protein, bacteria; D001616:beta-Galactosidase