title: Rv0802c from Mycobacterium tuberculosis: the first structure of a succinyltransferase with the GNAT fold.
abstract: Gene rv0802c from Mycobacterium tuberculosis encodes a 218-amino-acid protein and is annotated as a hypothetical protein with homology to GCN5-related N-acetyltransferases. The structure of Rv0802c was determined in an unliganded form to 2.0 A resolution utilizing single-wavelength anomalous dispersion from a samarium soak that resulted in a single bound Sm(3+):citrate(2) complex. The structure confirms that Rv0802c exhibits the GCN5-related N-acetyltransferase fold and revealed a tetramer composed of a dimer of dimers with approximate 222 symmetry. In addition, a bound acetate ion indicated that Rv0802c may utilize a unique acyl donor for the family. The subsequent determination of the structure of Rv0802c in complex with succinyl-CoA to 2.3 A resolution suggests that Rv0802c is the first known GCN5-related N-acetyltransferase family member to utilize succinyl-CoA as a substrate.
authors.affiliation: Department of Biochemistry, Albert Einstein College of Medicine, 1300 Morris Park Avenue, Bronx, NY 10461, USA. vetting@aecom.yu.edu
authors.forename: Matthew W
authors.initials: MW
authors.lastname: Vetting
authors.forename: James C
authors.initials: JC
authors.lastname: Errey
authors.forename: John S
authors.initials: JS
authors.lastname: Blanchard
mesh_terms: D000085:Acetates / Q000737:chemistry; D000123:Acetyltransferases / Q000737:chemistry* / Q000235:genetics / Q000378:metabolism; D000214:Acyl Coenzyme A / Q000737:chemistry / Q000378:metabolism; D000595:Amino Acid Sequence; D001426:Bacterial Proteins / Q000737:chemistry* / Q000235:genetics / Q000378:metabolism; D001665:Binding Sites; D002951:Citrates / Q000737:chemistry; D006801:Humans; D008958:Models, Molecular; D008969:Molecular Sequence Data; D015394:Molecular Structure; D009169:Mycobacterium tuberculosis / Q000201:enzymology* / Q000235:genetics; D055503:Protein Multimerization; D017434:Protein Structure, Tertiary; D021122:Protein Subunits / Q000737:chemistry / Q000235:genetics / Q000378:metabolism; D012493:Samarium / Q000737:chemistry; D016415:Sequence Alignment
chemical_list: D000085:Acetates; D000214:Acyl Coenzyme A; D001426:Bacterial Proteins; D002951:Citrates; D021122:Protein Subunits; D012493:Samarium; C012046:succinyl-coenzyme A; D000123:Acetyltransferases