Function
Member of the two-component regulatory system GraR/GraS involved in resistance against cationic antimicrobial peptides (CAMPs). GraS probably functions as a sensor protein kinase which is autophosphorylated at a histidine residue and transfers its phosphate group to GraR. GraR/GraS up-regulates the dlt operon and many other genes, such as other global regulators, adhesins, exoproteins, transporters, toxins, and proteins involved in cell wall synthesis. Down-regulates the expression of many genes involved in RNA and amino acid synthesis or glycolysis. Confers resistance to vancomycin, polymyxin B, lysozyme and LL-37.
Sequence
MNNLKWVAYFLKSRMNWIFWILFLNFLMLGISLIDYDFPIDSLFYIVSLNLSLTMIFLLLTYFKEVKLYKHFDKDKEIEEIKHKDLAETPFQRHTVDYLYRQISAHKEKVVEQQLQLNMHEQTITEFVHDIKTPVTAMKLLIDQEKNQERKQALLYEWSRINSMLDTQLYITRLESQRKDMYFDYVSLKRMVIDEIQLTRHISQVKGIGFDVDFKVDDYVYTDIKWCRMIIRQILSNALKYSENFNIEIGTELNDQHVSLYIKDYGRGISKKDMPRIFERGFTSTANRNETTSSGMGLYLVNSVKDQLGIHLQVTSTVGKGTTVRLIFPLQNEIVERMSEVTNLSF