Development of novel cell surface display in Corynebacterium glutamicum using porin.
We have developed a novel cell surface display in Corynebacterium glutamicum using porin proteins as anchor proteins. Porins are localized at C. glutamicum mycolic acid layer and exist as a hexamer. We used alpha-amylase from Streptococcus bovis 148 (AmyA) as a model protein to be displayed on the C. glutamicum cell surface. AmyA was fused to the C terminus of the porins PorB, PorC, or PorH. Expression vectors using fused proteins under the control of the cspB promoter were constructed and introduced into the C. glutamicum Cm strain. Immunostaining microscopy and flow cytometric analysis revealed that PorB-AmyA, PorC-AmyA, and PorH-AmyA were displayed on the C. glutamicum cell surface. AmyA activity was only detected in the cell fraction of C. glutamicum cells that displayed AmyA fused to PorB, PorC or PorH and AmyA activity was not detected in the supernatants of C. glutamicum culture broths after 72 h cultivation. Thus, we have demonstrated that C. glutamicum porins are very efficient anchor proteins for protein display in C. glutamicum.
Department of Molecular Science and Material Engineering, Graduate School of Science and Technology, Kobe University, 1-1 Rokkodaicho, Nada-ku, Kobe, 657-8501, Japan.
Toshihiro
T
Tateno
Kazuki
K
Hatada
Tsutomu
T
Tanaka
Hideki
H
Fukuda
Akihiko
A
Kondo
D048230:Corynebacterium glutamicum / Q000235:genetics* / Q000378:metabolism*; D008565:Membrane Proteins / Q000235:genetics* / Q000378:metabolism*; D018272:Porins / Q000235:genetics* / Q000378:metabolism*; D011993:Recombinant Fusion Proteins / Q000235:genetics / Q000378:metabolism; D016985:Streptococcus bovis / Q000201:enzymology / Q000235:genetics; D000516:alpha-Amylases / Q000235:genetics / Q000378:metabolism
D008565:Membrane Proteins; D018272:Porins; D011993:Recombinant Fusion Proteins; D000516:alpha-Amylases