The homeodomains of the heterodimeric bE and bW proteins of Ustilago maydis are both critical for function

In Ustilago maydis, pathogenic development is controlled by the multiallelic b-mating type locus. b encodes two different homeodomain proteins, bE and bW, that dimerize only when they originate from different alleles. The heterodimer is thought to act as a transcriptional regulator of pathogenicity genes. To address the contribution of individual… (More)