Ray38p, a homolog of a purine motif triple-helical DNA-binding protein, Stm1p, is a ribosome-associated protein and dissociated from ribosomes prior to the induction of cycloheximide resistance in Candida maltosa.

Abstract:

:Cycloheximide (CYH) resistance in Candida maltosa is dependent on the induction of a ribosomal protein, Q-type L41, the 56th residue of which is glutamine, not proline as in ordinary P-type L41. We found that a 38-kDa protein in a wild-type C. maltosa ribosomal fraction became undetectable upon CYH treatment but detectable again with the establishment of CYH resistance by the induction of Q-type L41. We cloned a gene coding for this protein and named it RAY38 (ribosome-associated protein of yeast). Ray38p is a homolog of a purine motif triple-helical DNA-binding protein, Stm1p, and has a putative RNA-binding motif RGG. The ribosome-associated Ray38p was phosphorylated at serine and threonine residues, and Ray38p that was dissociated from ribosome by CYH treatment was highly phosphorylated in threonine residues. A ray38 null mutant recovered faster from CYH-caused growth stasis than the wild-type strain, suggesting that the dissociation of Ray38p from ribosome facilitates the induction of CYH resistance in C. maltosa.

authors

Takaku H,Mutoh E,Horiuchi H,Ohta A,Takagi M

doi

10.1006/bbrc.2001.4951

subject

Has Abstract

pub_date

2001-06-01 00:00:00

pages

194-202

issue

1

eissn

0006-291X

issn

1090-2104

pii

S0006-291X(01)94951-4

journal_volume

284

pub_type

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