Structure of a bacterial sensory receptor. A site-directed sulfhydryl study

J J Falke, A F Dernburg, D A Sternberg, N Zalkin, D L Milligan, D E Koshland
<span title="1988-10-15">1988</span> <i title="American Society for Biochemistry and Molecular Biology"> <a target="_blank" rel="noopener" href="" style="color: black;">Journal of Biological Chemistry</a> </i> &nbsp;
Cysteines are substituted at six positions in the aspartate receptor, and these mutant proteins are used to investigate three major facets of receptor structure. 1) The surface of the receptor is examined through measurement of the rate constants for chemical modification of the cysteines by aqueous reagents. Different positions exhibit a range of accessibility (for example, Cys-128 most exposed, Cys-36 most buried). 2) The transmembrane structure of the receptor is determined by reaction of
more &raquo; ... cysteines with a membrane-impermeant reagent. 3) The spatial proximities in the folded structure of specific pairs of cysteines are investigated by disulfide bond formation. These studies illustrate the usefulness of site-directed sulfhydryl chemistry in the analysis of protein structure.
<span class="external-identifiers"> <a target="_blank" rel="external noopener" href="">pmid:3049592</a> <a target="_blank" rel="external noopener" href="">fatcat:r546tjp3n5a5liwo45e33mqt2y</a> </span>
<a target="_blank" rel="noopener" href="" title="fulltext PDF download" data-goatcounter-click="serp-fulltext" data-goatcounter-title="serp-fulltext"> <button class="ui simple right pointing dropdown compact black labeled icon button serp-button"> <i class="icon ia-icon"></i> Web Archive [PDF] <div class="menu fulltext-thumbnail"> <img src="" alt="fulltext thumbnail" loading="lazy"> </div> </button> </a>