TY  - JOUR
AU  - Amoroso, G.
AU  - Morell-Avrahov, L.
AU  - Müller, D.
AU  - Klug, K.
AU  - Sültemeyer, D.
TI  - The gene NCE103 (YNL036w) from Saccharomyces cerevisiae encodes a functional carbonic anhydrase and its transcription is regulated by the concentration of inorganic carbon in the medium
JO  - Molecular microbiology
VL  - 56
SN  - 0950-382X
CY  - Oxford [u.a.]
PB  - Wiley-Blackwell
M1  - PreJuSER-46012
SP  - 549 - 558
PY  - 2005
N1  - Record converted from VDB: 12.11.2012
AB  - Carbonic anhydrase (CA) catalyses the rapid interconversion between CO(2) and HCO(3) (-). Despite its wide distribution among living organisms, the presence of CA in fungi has been controversially discussed. Using mass spectrometric analysis of (18)O exchange from doubly labelled CO(2), we were able to measure CA activity in intact cells of Saccharomyces cerevisiae. Intracellular CA activity was lacking in the Deltance103 mutant, indicating that NCE103 encodes a functional CA. This was proven by overexpressing and purification of the NCE103 gene product showing a specific activity of around 6900 units per mg protein. Interestingly, the in vivo CA activity was 10-20 times higher in cells grown on low inorganic carbon (Ci; air containing 0.035% CO(2)) than in high-Ci cells (grown on 5% CO(2)). The enhanced CA activity of low-Ci cells was inducible after transferring high-Ci cells to air. Northern blot analysis revealed that that expression of NCE103 is transcriptionally regulated by low Ci which was also demonstrated by fusing the NCE103 promoter to beta-galactosidase as a reporter gene. Inactivation of NCE103 results in a high CO(2) requiring mutant indicating that a functional CA is an important prerequisite for S. cerevisiae to grow under low-Ci conditions.
KW  - Carbon: metabolism
KW  - Carbon: physiology
KW  - Carbonic Anhydrases: chemistry
KW  - Carbonic Anhydrases: classification
KW  - Carbonic Anhydrases: genetics
KW  - Carbonic Anhydrases: metabolism
KW  - Culture Media
KW  - Gene Expression Regulation, Fungal
KW  - Genes, Fungal
KW  - Saccharomyces cerevisiae: enzymology
KW  - Saccharomyces cerevisiae: genetics
KW  - Saccharomyces cerevisiae: metabolism
KW  - Transcription, Genetic: physiology
KW  - Culture Media (NLM Chemicals)
KW  - Carbon (NLM Chemicals)
KW  - Carbonic Anhydrases (NLM Chemicals)
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
C6  - pmid:15813743
UR  - <Go to ISI:>//WOS:000227897400020
DO  - DOI:10.1111/j.1365-2958.2005.04560.x
UR  - https://juser.fz-juelich.de/record/46012
ER  -