Crystal structure of Staphylococcus aureus hypothetical protein SA1388

Structure of a conserved hypothetical protein SA1388 from S. aureus reveals a capped hexameric toroid with two PII domain lids and a dinuclear metal center.

AMDPMKIADLMTLLDHHVPFSTAESWDNVGLLIGDEDVEVTGVLTALDCTLEVVNEAIEKGYNTIISHHPLIFKGVTSLK
ANGYGLIIRKLIQHDINLIAMHTNLDVNPYGVNMMLAKVMGLKNISIINNQQDVYYKVQTYIPKDNVGPFKDKLSENGLA
QEGNYEYCFFESEGRGQFKPVGEANPTIGQIDKIEDVDEVKIEFMIDAYQKSRAEQLIKQYHPYETPVFDFIEIKQTSLY
GLGVMAEVDNQMTLEDFAADIKSKLNIPSVRFVGESNQKIKRIAIIGGSGIGYEYQAVQQGADVFVTGDIKHHDALDAKI
HGVNLIDINHYSEYVMKEGLKTLLMNWFNIEKINIDVEASTINTDPFQYI

The structure factor file that authors deposited is the native data set used in the refinement

0.1 M Bis-Tris propane, pH 8.5, 0.2 M MgCl2, 30% PEG 400, VAPOR DIFFUSION, HANGING DROP, temperature 298K

SEQUENCE
AUTHORS STATE THAT G32E MUTATION IS INCIDENTAL DUE TO
PCR, AND THAT A115V MUTATION MIGHT BE INCIDENTAL,
EITHER DUE TO PCR OR ARISEN SPONTANEOUSLY. AUTHORS
CLEARLY SEE THE ELECTRON DENSITY FOR RESIDUE 115
AND THEREFORE MODELED THIS RESIDUE AS VALINE.

HYDROGENS HAVE BEEN ADDED IN THE RIDING POSITIONS. THE SAD DATA SET HAS BEEN USED FOR PHASING, AND THE NATIVE DATA SET HAS BEEN USED FOR REFINEMENT

HEXAMER. THE FUNCTIONAL OLIGOMER IS MOST LIKELY A HEXAMER FORMED BY A DIMER OF TRIMERS

HYPOTHETICAL PROTEIN SA1388, SELENOMETHIONINE SAD, UNKNOWN FUNCTION

MKIADLMTLLDHHVPFSTAESWDNVGLLIGDGDVEVTGVLTALDCTLEVVNEAIEKGYNTIISHHPLIFKGVTSLKANGY
GLIIRKLIQHDINLIAMHTNLDVNPYGVNMMLAKAMGLKNISIINNQQDVYYKVQTYIPKDNVGPFKDKLSENGLAQEGN
YEYCFFESEGRGQFKPVGEANPTIGQIDKIEDVDEVKIEFMIDAYQKSRAEQLIKQYHPYETPVFDFIEIKQTSLYGLGV
MAEVDNQMTLEDFAADIKSKLNIPSVRFVGESNQKIKRIAIIGGSGIGYEYQAVQQGADVFVTGDIKHHDALDAKIHGVN
LIDINHYSEYVMKEGLKTLLMNWFNIEKINIDVEASTINTDPFQYI