Send to

Choose Destination
FEBS Lett. 1993 Nov 22;334(3):360-4.

Determination and mutational analysis of the phosphorylation site in the hypusine-containing protein Hyp2p.

Author information

Max Planck Institute for Biochemistry, Martinsried, Germany.


Electrospray mass spectrometry of the purified isoforms of the hypusine-containing protein of Saccharomyces cerevisiae Hyp2p suggested a phosphorylation of the acidic isoform, which was confirmed by phosphatase treatment. The phosphorylation site was mapped to the N-acetylated serine residue in position no. 1 by mass spectrometric analysis of enzymatic fragments. Mutation of this serine residue gives rise to only the basic isoform, confirming our protein chemical data. As this mutation has no effect on cell viability or growth rate, the unphosphorylated isoform is sufficient to exert the essential in vivo function of Hyp2p.

[Indexed for MEDLINE]
Free full text

Supplemental Content

Full text links

Icon for Wiley
Loading ...
Support Center