کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
2048318 | 1074076 | 2012 | 6 صفحه PDF | دانلود رایگان |
The crystal structure for cce_0566 (171 aa, 19.4 kDa), a DUF269 annotated protein from the diazotrophic cyanobacterium Cyanothece sp. ATCC 51142, was determined to 1.60 Å resolution. Cce_0566 is a homodimer with each molecule composed of eight α-helices folded on one side of a three strand anti-parallel β-sheet. Hydrophobic interactions between the side chains of largely conserved residues on the surface of each β-sheet hold the dimer together. The fold observed for cce_0566 may be unique to proteins in the DUF269 family, hence, the protein may also have a function unique to nitrogen fixation. A solvent accessible cleft containing conserved charged residues near the dimer interface could represent the active site or ligand-binding surface for the protein’s biological function.Structured summary of protein interactionsDUF269 and DUF269bind by x-ray crystallography (View interaction)
► First structural characterization of a protein from the DUF269 family.
► Dali search indicates protein fold is unique in current protein space.
► Homodimer with each unit containing 8 α-helices and 3-strand anti-parallel β-sheet.
► Hydrophobic interactions between intermolecular β-sheets hold dimer together.
► Cleft containing conserved charged residues at dimer interface is possible active site.
Journal: FEBS Letters - Volume 586, Issue 4, 17 February 2012, Pages 350–355