Merck
  • Home
  • Search Results
  • LmCBP1, a secreted chitin-binding protein, is required for the pathogenicity of Leptosphaeria maculans on Brassica napus.

LmCBP1, a secreted chitin-binding protein, is required for the pathogenicity of Leptosphaeria maculans on Brassica napus.

Fungal genetics and biology : FG & B (2019-12-22)
Fei Liu, Carrie Selin, Zhongwei Zou, W G Dilantha Fernando
ABSTRACT

Leptosphaeria maculans is the causal agent of blackleg disease on Brassica napus. Determining the underlying functions of genes required for pathogenesis is essential for understanding the infection process. A chitin-binding protein (LmCBP1) was discovered as a pathogenicity factor for the infection of B. napus by L. maculans through gene knockout using the CRISPR-Cas9 system. Chitin-binding activity was demonstrated through a chitin-protein binding assay. A secreted signal peptide was detected using a yeast secreted-signal peptide trap assay. An increased expression level during the infection stage was also observed, suggesting that LmCBP1 is a secreted protein. The knockout mutants showed decreased infection on B. napus, with reduced pathogenicity on ten cultivars with/without diverse R genes. The mutants were more sensitive to H2O2 compared to wild type L. maculans isolate JN3. This study provides evidence of the virulence of a novel chitin-binding protein LmCBP1 on B. napus through mutants created via the CRISPR-Cas9 system.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
灰链霉菌来源几丁质酶, lyophilized powder (essentially salt free), ≥200 units/g solid
Sigma-Aldrich
纤维素酶 来源于曲霉 属, aqueous solution