Phototaxis and impaired motility in adenylyl cyclase and cyclase receptor protein mutants of Synechocystis sp. strain PCC 6803

J Bacteriol. 2006 Oct;188(20):7306-10. doi: 10.1128/JB.00573-06.


We have carefully characterized and reexamined the motility and phototactic responses of Synechocystis sp. adenylyl cyclase (Cya1) and catabolite activator protein (SYCRP1) mutants to different light regimens, glucose, 3-(3,4-dichlorophenyl)-1,1-dimethylurea, and cyclic AMP. We find that contrary to earlier reports, cya1 and sycrp1 mutants are motile and phototactic but are impaired in one particular phase of phototaxis in comparison with wild-type Synechocystis sp.

Publication types

  • Comparative Study
  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Adenylyl Cyclases / genetics*
  • Adenylyl Cyclases / physiology
  • Chemotaxis / genetics
  • Cyclic AMP
  • Cyclic AMP Receptor Protein / genetics*
  • Cyclic AMP Receptor Protein / physiology
  • Diuron
  • Glucose
  • Light
  • Movement
  • Mutation*
  • Synechocystis / enzymology*
  • Synechocystis / genetics
  • Synechocystis / physiology


  • Cyclic AMP Receptor Protein
  • Diuron
  • Cyclic AMP
  • Adenylyl Cyclases
  • Glucose