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- Title
Mutational Analysis of the pH Signal Transduction Component PaIC of Aspergillus nidulans Supports Distant Similarity to BRO1 Domain Family Members.
- Authors
Tilburn, Joan; Sánchez-Ferrero, Juan C.; Reoyo, Elena; Arst Jr., Herbert N.; Peñalva, Miguel A.
- Abstract
The alkaline ambient pH signal transduction pathway component PalC has no assigned molecular role. Therefore we attempted a gene-specific mutational analysis and obtained 55 new palC loss-of-function alleles including 94 single residue substitutions. Refined similarity searches reveal conserved PalC regions including one with convincing similarity to the BRO1 domain, denoted PCBROH, where clustering of mutational changes, including PCBROH key residue substitutions, supports its structural and/or functional importance. Since the BRO1 domain occurs in the multivesicular body (MVB) pathway protein Bro1/Vps31 and also the pH signal transduction protein PalA (Rim20), both of which interact with MVB component (ESCRT-III protein) Vps32/Snf7, this might reflect a further link between the pH response and endocytosis.
- Subjects
HYDROGEN-ion concentration; GENETIC transduction; ASPERGILLUS nidulans; ENDOCYTOSIS; GENETIC mutation
- Publication
Genetics, 2005, Vol 171, Issue 1, p393
- ISSN
0016-6731
- Publication type
Article
- DOI
10.1534/genetics.105.044644