Identification of three proteins up-regulated by raw starch in Cytophaga sp.

Rong Jen Shiau, Yu Der Wen, Chii Ling Jeang

Research output: Contribution to journalArticle

Abstract

Raw starch-digesting amylases (RSDAs) in many microorganisms convert starch granules into maltodextrins and simple sugars. We cloned and sequenced from Cytophaga sp. an RSDA with an excellent raw starch digestion activity. This RSDA was highly inducible by raw starch, but not by other sugars, suggesting that an unknown signal transduction mechanism is involved in the degradation of raw starch. We used a proteomic approach to investigate the effect of raw starch on protein expression in Cytophaga sp. Using MALDI-TOF MS protein analysis, we have identified three proteins up-regulated by raw starch, i.e., a 60-kDa chaperonin (cpn60), glutaminase, and pyruvate phosphate dikinase (PPDK). Subsequent time-course studies detected an increased expression of RSDA as well as the highest expression of PPDK occurring 6 h post-incubation with raw corn starch, implying that the latter enzyme may work along with RSDA on the digestion of raw starch. Finding these proteins up-regulated by raw starch may provide an insight into how Cytophaga sp. cells respond to raw starch stimulation.

Original languageEnglish
Pages (from-to)651-655
Number of pages5
JournalArchives of Microbiology
Volume190
Issue number6
DOIs
Publication statusPublished - 2008 Dec 1

Fingerprint

Cytophaga
Starch
Proteins
Amylases
Orthophosphate Dikinase Pyruvate
Sugars
Digestion
Chaperonins
Glutaminase
Chaperonin 60
Signal transduction
Time and motion study
Matrix-Assisted Laser Desorption-Ionization Mass Spectrometry

All Science Journal Classification (ASJC) codes

  • Microbiology
  • Biochemistry
  • Molecular Biology
  • Genetics

Cite this

Shiau, Rong Jen ; Wen, Yu Der ; Jeang, Chii Ling. / Identification of three proteins up-regulated by raw starch in Cytophaga sp. In: Archives of Microbiology. 2008 ; Vol. 190, No. 6. pp. 651-655.
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Identification of three proteins up-regulated by raw starch in Cytophaga sp. / Shiau, Rong Jen; Wen, Yu Der; Jeang, Chii Ling.

In: Archives of Microbiology, Vol. 190, No. 6, 01.12.2008, p. 651-655.

Research output: Contribution to journalArticle

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