Structure determination of selenomethionyl S-adenosylhomocysteine hydrolase using data at a single wavelength.

Published

Journal Article

S-Adenosylhomocysteine (AdoHcy) hydrolase regulates all adenosylmethionine-(AdoMet) dependent transmethylations by hydrolyzing the potent feedback inhibitor AdoHcy to homocysteine and adenosine. The crystallographic structure determination of a selenomethionyl-incorporated AdoHcy hydrolase inhibitor complex was accomplished using single wavelength anomalous diffraction data and the direct methods program, Snb v2.0, which produced the positions of all 30 crystallographically distinct selenium atoms. The mode of enzyme-cofactor binding is unique, requiring interactions from two protein monomers. An unusual dual role for a catalytic water molecule in the active site is revealed in the complex with the adenosine analog 2'-hydroxy, 3'-ketocyclopent-4'-enyladenine.

Full Text

Duke Authors

Cited Authors

  • Turner, MA; Yuan, CS; Borchardt, RT; Hershfield, MS; Smith, GD; Howell, PL

Published Date

  • May 1998

Published In

Volume / Issue

  • 5 / 5

Start / End Page

  • 369 - 376

PubMed ID

  • 9586999

Pubmed Central ID

  • 9586999

International Standard Serial Number (ISSN)

  • 1072-8368

Digital Object Identifier (DOI)

  • 10.1038/nsb0598-369

Language

  • eng