title: Solution structure of the hypothetical protein Mth677 from Methanobacterium thermoautotrophicum: a novel alpha+beta fold.
abstract: The structure of Mth677, a hypothetical protein from Methanobacterium thermoautotrophicum (Mth), has been determined by using heteronuclear nuclear magnetic resonance (NMR) methods on a double-labeled (15)N-(13)C sample. Mth677 adopts a novel alpha+beta fold, consisting of two alpha-helices (one N terminal and one C terminal) packed on the same side of a central beta-hairpin. This structure is likely shared by its three orthologs, detected in three other Archaebacteria. There are no clear features in the sequences of these proteins or in the genome organization of Mth to make a reliable functional assignment to this protein. However, the structural similarity to Escherichia coli MinE, the protein which controls that division occurs at the midcell site, lends support to the proposal that Mth677 might be, in Mth, the counterpart of the topological specificity domain of MinE in E. coli.
authors.affiliation: NMR Group, Centro Nacional de Investigaciones Oncológicas, Madrid, Spain.
authors.forename: Francisco J
authors.initials: FJ
authors.lastname: Blanco
authors.forename: Adelinda
authors.initials: A
authors.lastname: Yee
authors.forename: Ramón
authors.initials: R
authors.lastname: Campos-Olivas
authors.forename: Angel R
authors.initials: AR
authors.lastname: Ortiz
authors.forename: Demian
authors.initials: D
authors.lastname: Devos
authors.forename: Alfonso
authors.initials: A
authors.lastname: Valencia
authors.forename: Cheryl H
authors.initials: CH
authors.lastname: Arrowsmith
authors.forename: Manuel
authors.initials: M
authors.lastname: Rico
mesh_terms: D000595:Amino Acid Sequence; D019843:Archaeal Proteins / Q000737:chemistry* / Q000235:genetics / Q000378:metabolism; D003001:Cloning, Molecular; D017014:Methanobacterium / Q000737:chemistry*; D008958:Models, Molecular; D008969:Molecular Sequence Data; D019906:Nuclear Magnetic Resonance, Biomolecular; D011487:Protein Conformation; D017510:Protein Folding; D012996:Solutions / Q000737:chemistry; D040681:Structural Homology, Protein
chemical_list: D019843:Archaeal Proteins; D012996:Solutions