Expression, purification, crystallization and preliminary X-ray analysis of the D-alanyl carrier protein DltC from Staphylococcus epidermidis.

ABSTRACT: The D-alanyl lipoteichoic acids (D-alanyl LTAs) present in the cell walls of Gram-positive bacteria play crucial roles in autolysis, cation homeostasis and biofilm formation. The alanylation of LTAs requires the D-alanyl carrier protein DltC to transfer D-Ala onto a membrane-associated LTA. Here, DltC from Staphylococcus epidermidis (SeDltC) was purified and crystallized using the sitting-drop vapour-diffusion method. The crystals diffracted to a resolution of 1.83?Å and belonged to space group P2, with unit-cell parameters a = 66.26, b = 53.28, c = 88.05?Å, ? = 98.22°. The results give a preliminary crystallographic analysis of SeDltC and shed light on the functional role of DltC in the alanylation of LTAs.

SUBMITTER: Huang CH 

PROVIDER: S-EPMC3388928 | biostudies-literature | 2012 Jul

REPOSITORIES: biostudies-literature