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The b alleles of U. maydis, whose combinations program pathogenic development, code for polypeptides containing a homeodomain-related motif
Open accessAbstract
U. maydis is a fungal pathogen of corn with two forms: one is yeast-like and nonpathogenic; the other is filamentous and pathogenic. The b locus, with 25 different alleles, regulates this dimorphism: any combination of two different alleles triggers pathogenic development, whereas the presence of identical alleles results in the yeast-like form. We have cloned four b alleles (b1, b2, b3, and b4) and show that the b locus contains a single open reading frame (ORF) of 410 amino acids with a variable N-terminal region and a highly conserved C-terminal region (60% and 93% identity, respectively). Mutational analysis confirms that this ORF is responsible for b activity. The b polypeptides appear to be DNA binding proteins because they contain a motif related to the homeodomain in their constant region. We propose that combinatorial interactions between b polypeptides generate regulatory proteins that determine the developmental program of the fungus.
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Citations
Cited by
Molecular Genetics of Mating Recognition in Basidiomycete Fungi
Casselton, L. A., & Olesnicky, N. S. (1998) · Microbiology and Molecular Biology Reviews · doi:10.1128/mmbr.62.1.55-70.1998 · Cited by 353
Grueneberg, D. A., Natesan, S., Alexandre, C., & Gilman, M. Z. (1992) · Science · doi:10.1126/science.257.5073.1089 · Cited by 310
MATING TYPE IN FILAMENTOUS FUNGI
Kronstad, J. W., & Staben, C. (1997) · Annual Review of Genetics · doi:10.1146/annurev.genet.31.1.245 · Cited by 298
DNA binding specificity of homeodomains
Laughon, A. (1991) · Biochemistry · doi:10.1021/bi00112a001 · Cited by 285
vHNF1 is a homeoprotein that activates transcription and forms heterodimers with HNF1.
Rey-Campos, J., Chouard, T., Yaniv, M., & Cereghini, S. (1991) · The EMBO Journal · doi:10.1002/j.1460-2075.1991.tb07665.x · Cited by 278
Metadata
- Authors
- Schulz, B., Banuett, F., Dahl, M., Schlesinger, R., Schäfer, W., Martin, T., Herskowitz, I., & Kahmann, R.
- Venue
- Cell
- Publisher
- Elsevier BV
- Published
- 1990-01
- Volume
- 60
- Issue
- 2
- Pages
- 295-306
- ISSN
- 0092-8674 (ISSN-L)
- OpenAlex
- W2171847212
- Cited by
- 404
- References
- 0
- FWCI
- 7.70
- Type
- journal article
- Language
- en
- Open access
- hybrid
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- CoChat. (2026). Citation check: The b alleles of U. maydis, whose combinations program pathogenic development, code for polypeptides containing a homeodomain-related motif. https://app.cochat.ai/papers/10.1016/0092-8674(90)90744-y
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- Schulz, B., Banuett, F., Dahl, M., Schlesinger, R., Schäfer, W., Martin, T., Herskowitz, I., & Kahmann, R. (1990). The b alleles of U. maydis, whose combinations program pathogenic development, code for polypeptides containing a homeodomain-related motif. Cell. https://doi.org/10.1016/0092-8674(90)90744-y
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