title: The gene mpn310 (hmw2) from Mycoplasma pneumoniae encodes two proteins, HMW2 and HMW2-s, which differ in size but use the same reading frame.
abstract: The gene mpn310 from Mycoplasma pneumoniae encodes the proteins HMW2 with a molecular weight of 215 621 and the smaller P28, here called HMW2-s. Because HMW2-s is not well defined, it was isolated from protein extracts of M. pneumoniae cells and its N-terminal end was determined by MS. HMW2-s starts with the methionine at the amino acid position 1620 of HMW2 and its residual sequence is identical to the last 198 amino acids of HMW2, predicting a molecular weight of 23 204. These results were confirmed by the comparative MS analysis of HMW2-s that had been synthesized in Escherichia coli. A precursor-product relationship between HMW2 and HMW2-s could be excluded, because HMW2-s can be translated from a specific mRNA starting within mpn310. The conservation of an HMW2-s like protein in M. pneumoniae and Mycoplasma genitalium emphasizes its possible functional importance.
authors.affiliation: Zentrum für Molekulare Biologie der Universität Heidelberg (ZMBH), Heidelberg, Germany.
authors.forename: Atcha
authors.initials: A
authors.lastname: Boonmee
authors.forename: Thomas
authors.initials: T
authors.lastname: Ruppert
authors.forename: Richard
authors.initials: R
authors.lastname: Herrmann
mesh_terms: D018829:Adhesins, Bacterial / Q000737:chemistry* / Q000235:genetics / Q000302:isolation & purification / Q000378:metabolism; D000595:Amino Acid Sequence; D001483:Base Sequence; D008969:Molecular Sequence Data; D008970:Molecular Weight; D009177:Mycoplasma pneumoniae / Q000737:chemistry* / Q000235:genetics* / Q000378:metabolism; D020033:Protein Isoforms / Q000737:chemistry / Q000235:genetics / Q000302:isolation & purification / Q000378:metabolism; D016364:Reading Frames
chemical_list: D018829:Adhesins, Bacterial; C117432:HMW2 protein, bacteria; D020033:Protein Isoforms