Molecular architecture of the ATP-dependent CodWX protease having an N-terminal serine active site.
CodWX in Bacillus subtilis is an ATP-dependent, N-terminal serine protease, consisting of CodW peptidase and CodX ATPase. Here we show that CodWX is an alkaline protease and has a distinct molecular architecture. ATP hydrolysis is required for the formation of the CodWX complex and thus for its proteolytic function. Remarkably, CodX has a 'spool-like' structure that is formed by interaction of the intermediate domains of two hexameric or heptameric rings. In the CodWX complex, CodW consisting of two stacked hexameric rings (WW) binds to either or both ends of a CodX double ring (XX), forming asymmetric (WWXX) or symmetric cylindrical particles (WWXXWW). CodWX can also form an elongated particle, in which an additional CodX double ring is bound to the symmetric particle (WWXXWWXX). In addition, CodWX is capable of degrading EzrA, an inhibitor of FtsZ ring formation, implicating it in the regulation of cell division. Thus, CodWX appears to constitute a new type of protease that is distinct from other ATP-dependent proteases in its structure and proteolytic mechanism.
Kang
Min Suk
MS
NRL of Protein Biochemistry, School of Biological Sciences, Seoul National University, Seoul 151-742, Korea.
Kim
Soon Rae
SR
Kwack
Pyeongsu
P
Lim
Byung Kook
BK
Ahn
Sung Won
SW
Rho
Young Min
YM
Seong
Ihn Sik
IS
Park
Seong-Chul
SC
Eom
Soo Hyun
SH
Cheong
Gang-Won
GW
Chung
Chin Ha
CH
D049069:ATP-Dependent Proteases; D000255:Adenosine Triphosphate / Q000378:metabolism*; D001426:Bacterial Proteins / Q000235:genetics / Q000378:metabolism; D001665:Binding Sites; D006360:Heat-Shock Proteins / Q000737:chemistry / Q000378:metabolism; D046911:Macromolecular Substances; D020836:Protein Structure, Quaternary; D012694:Serine / Q000737:chemistry / Q000378:metabolism*; D012697:Serine Endopeptidases / Q000737:chemistry* / Q000378:metabolism* / Q000648:ultrastructure
D001426:Bacterial Proteins; C121014:EzrA protein, Bacillus subtilis; D006360:Heat-Shock Proteins; D046911:Macromolecular Substances; D012694:Serine; D000255:Adenosine Triphosphate; D049069:ATP-Dependent Proteases; C423319:CodWX protease; D012697:Serine Endopeptidases