Journal: Virulence
Article Title: Global regulator DksA modulates virulence of Acinetobacter baumannii
doi: 10.1080/21505594.2021.1995253
Figure Lengend Snippet: Identification of DksA in A. baumannii . (a) Multiple alignments of translated sequences of A1S_0248 with DksA of other bacterial species. The gray highlight indicates identical amino acids with E. coli DksA. The bold characters indicate >50% consensus amino acids among the tested bacterial species. Sequence conservation is presented as the height of colored bars. The accession number of DksA proteins is ABO10723 in A. baumannii ATCC 17978, VWQ00927 in E. coli , CDO15944 in Klebsiella pneumoniae , WP_058139749 in Pseudomonas aeruginosa , KIS47657 in Burkholderia cepacia , RTY79203 in Staphylococcus aureus , WP_047919748 in Neisseria gonorrheae , WP_148842572 in Streptococcus pyogenes , SGC70216 in Mycobacterium tuberculosis , and VTQ30573 in Streptococcus pneumoniae . (b) Sequence logo of DksA between E. coli and A. baumannii ATCC 17978 using the WebLogo 3. The red boxes are essential amino acids for RNAP binding and DksA activity in E. coli . The number is based on the amino acid sequences of E. coli DksA. Furthermore, 151 amino acids of E. coli DksA (the first number in parenthesis) are compared with the translated amino acid sequences of A1S_0248 of A. baumannii ATCC 17978 (the second number in parenthesis) in the boxes as follows: D (74, 101); A (76, 103); R (91, 118); R (125, 152); A (128, 155); I (136, 163); E (143, 170); I-M (144–149, 171–176). (c) The predicted three-dimensional structure of proteins encoded by A1S_0248 using Swiss-MODEL. Red and green colors indicate the amino acids for the RNAP binding and DksA activity, respectively
Article Snippet: Furthermore, (p)ppGpp-deficient mutants are more susceptible to antimicrobial agents, including gentamicin, tetracycline, erythromycin, and trimethoprim, than wild-type (WT) A. baumannii ATCC 17978 strain by downregulating efflux pump genes [ ].
Techniques: Sequencing, Binding Assay, Activity Assay