Applied Biochemistry and Biotechnology

, Volume 187, Issue 4, pp 1158–1172 | Cite as

Biochemical Properties and Catalytic Specificity of a Novel Neutral Serine Peptidase Secreted by Fungus Pyrenochaetopsis sp.

  • Ronivaldo Rodrigues da Silva
  • Nathalia Gonsales da Rosa
  • Lilian Caroline Gonçalves de Oliveira
  • Maria Aparecida Juliano
  • Luiz Juliano
  • Jose C. Rosa
  • Hamilton CabralEmail author


The fungal genus Pyrenochaetopsis has received particular attention because of its different lifestyles, such as numerous plant pathogenic, saprophytic, and endophytic species. Its ability to infect plant cells relies heavily upon secreted peptidases. Here, we investigated the biochemical properties and catalytic specificity of a new serine peptidase secreted by the filamentous fungus Pyrenochaetopsis sp. We found that while this neutral serine peptidase displayed optimal activity at a pH of 7.0 and temperature of 45 °C, it tolerated a wide range of pH conditions and temperatures lower than 45 °C. Its peptidase activity was depressed by some metallic ions (such as aluminum, cobalt, and copper (II) chloride) and enhanced by others (such as sodium, lithium, magnesium, potassium, calcium, and manganese). Lastly, the enzyme showed the greatest specificity for non-polar amino acids, particularly leucine and isoleucine, and moderate specificity for basic and neutral polar amino acids. It displayed the least specificity for acidic residues.


Enzyme Fungal protease Proteolytic enzymes Pathogen Pyrenochaetopsis 


Funding Information

The authors would like to acknowledge the financial support provided by Fundação de Amparo à Pesquisa do Estado de São Paulo-FAPESP (process 2011/06986-0 and 2012/24703-8), Conselho Nacional de Desenvolvimento Científico e Tecnológico, and Instituto Nacional de Ciência e Tecnologia-Rede de Biotecnologia Farmacêutica.

Compliance with Ethical Standards

Conflict of Interest

The authors declare no financial or commercial conflict of interest.


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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  • Ronivaldo Rodrigues da Silva
    • 1
  • Nathalia Gonsales da Rosa
    • 2
  • Lilian Caroline Gonçalves de Oliveira
    • 3
  • Maria Aparecida Juliano
    • 3
  • Luiz Juliano
    • 3
  • Jose C. Rosa
    • 4
  • Hamilton Cabral
    • 2
    Email author
  1. 1.Instituto de Biociências, Letras e Ciências ExatasUniversidade Estadual Paulista “Júlio de Mesquita Filho”São José do Rio PretoBrazil
  2. 2.Faculdade de Ciências Farmacêuticas de Ribeirão PretoUniversidade de São PauloRibeirão PretoBrazil
  3. 3.Universidade Federal de São Paulo – UNIFESPSão PauloBrazil
  4. 4.Faculdade de Medicina de Ribeirão PretoUniversidade de São PauloRibeirão PretoBrazil

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