5% SDS-PAGE gels. Western immunoblotting was performed with (A) rabbit anti-ClfB antibodies, (B) rabbit anti-SdrC antibodies, (C) rabbit anti-SdrD antibodies and (D) rabbit anti-SdrE antibodies and subsequently with HRP-conjugated protein A-peroxidase. Bacteria were also grown to

stationary phase in RPMI. The wild-type strain expressed ClfB, IsdA, SdrD and SdrE, but not SdrC at Talazoparib ic50 levels that were detectable by Western immunoblotting (Figure 3). The Sdr proteins were detected with antibodies that recognized the conserved B domains (Figure 3C) and specific anti-A domain antibodies (not shown). Complementation of the mutant strain lacking these surface proteins with pCU1clfB +, pCU isdAB +, pCU1sdrD + or pCU1sdrE + resulted in restoration of expression of the appropriate protein at levels similar to (IsdA) or higher

than wild-type (ClfB, SdrD, SdrE). In the case of pCU1sdrC + low level expression was achieved. Figure 3 Western immunoblot to detect expression of surface protein under iron-limiting conditions. Bacteria were grown to stationary phase in RPMI. Cell wall associated proteins were solubilized with lysostaphin and separated on a 7.5% SDS-PAGE gel and detected with rabbit antibodies followed by HRP-conjugated protein A-peroxidase. (A). Newman wild-type, Newman clfA, Newman clfA clfB, Newman clfA isdA clfB, Newman Lonafarnib price clfA clfB sdrCDE, Newman clfA isdA clfB sdrCDE, Newman clfA isdA clfB sdrCDE (pCU1) and Newman clfA isdA clfB sdrCDE (pCU1clfB +). (B). Newman wild type, Newman clfA, Newman clfA isdA, Newman clfA isdA clfB, Newman clfA isdA sdrCDE, Newman clfA isdA clfB sdrCDE, Newman VAV2 clfA isdA clfB sdrCDE (pCU1) and Newman clfA isdA clfB sdrCDE (pCU1isdAB +). (C). Newman clfA, Newman clfA sdrCDE, Newman clfA isdA sdrCDE, Newman clfA clfB sdrCDE, Newman clfA isdA clfB sdrCDE, Newman clfA isdA clfB sdrCDE (pCU1), Newman

clfA isdA clfB sdrCDE (pCU1sdrC +), Newman clfA isdA clfB sdrCDE (pCU1sdrD +) and Newman clfA isdA clfB sdrCDE (pCU1sdrE +). The primary antibodies used were (A) rabbit anti-ClfB (B) rabbit anti-IsdA and (C) rabbit anti-SdrD B repeats. With Newman clfA grown in TSB approximately 800 bacteria adhered per 100 squamous cells (Figure 4A). The level of adhesion was reduced to ca 500 bacteria per 100 squamous cells when either ClfB or a FHPI mw combination of SdrC, SdrD and SdrE proteins were missing (Figure 4A, P = 0.0392, ClfB; P = 0.0441, SdrCDE). Adherence was even lower when the clfB and sdrCDE mutations were combined (Figure 4A, P = 0.