Erwinia amylovora

General Information

Erwinia amylovora is a highly significant plant pathogen, primarily known for causing fire blight, a devastating disease affecting members of the Rosaceae family, including apple and pear trees. Fire blight is characterized by the rapid wilting and blackening of blossoms, shoots, and branches, which can lead to severe economic losses in orchards. This bacterium is particularly interesting due to its unique infection mechanism involving the production of exopolysaccharides, such as amylovoran, which play a crucial role in the disease's progression by facilitating the formation of biofilms and protecting the bacteria from plant defenses. One of the most notable features of E. amylovora is its type III secretion system (T3SS), a specialized protein delivery system that injects effector proteins directly into host plant cells. These effector proteins manipulate host cellular processes to the bacterium's advantage, suppressing plant immune responses and promoting infection. The T3SS is a common feature among many pathogenic bacteria, but its role in E. amylovora is particularly well-studied and serves as a model for understanding plant-pathogen interactions. Additionally, E. amylovora has been a subject of extensive research due to its genomic plasticity and the presence of plasmids that contribute to its virulence and adaptability. The bacterium's genome contains several pathogenicity islands, which are clusters of genes that enhance its ability to cause disease. These genetic elements can be transferred between bacteria, potentially spreading virulence traits and complicating disease management efforts. From a research perspective, E. amylovora is valuable not only for its impact on agriculture but also for its role in advancing our understanding of bacterial pathogenesis, host-pathogen interactions, and the development of disease-resistant plant varieties. Studies on this bacterium have led to the identification of key virulence factors and the development of innovative control strategies, including the use of bacteriophages and genetic engineering to enhance plant resistance. In summary, Erwinia amylovora is a critical pathogen in agricultural science, with unique characteristics that make it a focal point for research aimed at mitigating its impact and improving our broader understanding of bacterial diseases in plants.

Erwinia amylovora is a significant plant pathogenic bacterium known for causing fire blight, a devastating disease primarily affecting members of the Rosaceae family, including apple and pear trees. This organism is particularly interesting due to its ability to produce a range of extracellular enzymes that facilitate the breakdown of plant cell walls, allowing it to invade and colonize host tissues effectively. The bacterium's virulence is largely attributed to its type III secretion system, which injects effector proteins into host cells, manipulating plant defense responses to promote infection. One of the unique aspects of E. amylovora is its quorum sensing mechanism, which enables the bacteria to coordinate their behavior based on population density. This communication system is crucial for the regulation of virulence factors and biofilm formation, making it a fascinating subject for research into microbial interactions and plant-pathogen dynamics. From a research perspective, E. amylovora serves as a model organism for studying plant-bacterial interactions and the mechanisms of pathogenicity. Its well-characterized genome provides a valuable resource for genetic studies, and ongoing research aims to develop effective control strategies, including the use of biocontrol agents and resistant plant varieties. The economic impact of fire blight on fruit production underscores the importance of understanding this pathogen, making Erwinia amylovora a key player in agricultural microbiology.

Taxonomy

Superkingdom: Bacteria

Phylum: Pseudomonadota

Class: Gammaproteobacteria

Order: Enterobacterales

Family: Erwiniaceae

Genus: Erwinia

Species: Erwinia amylovora

NCBI ID

552

Genome Info

FTP Path:
ftp.ncbi.nlm.nih.gov/genomes/all/GCA/017/161/565/GCA_017161565.1_ASM1716156v1

File for sequence-based predictions:
GCA_017161565.1_ASM1716156v1_genomic.fasta

Descriptions

Clinical Implications and Relevance

Source: gpt-4o-mini-2024-07-18

The bacterium Erwinia amylovora is primarily known for its role as the causative agent of fire blight, a serious disease affecting various species of plants, particularly those in the Rosaceae family, such as apple and pear trees. While E. amylovora is not a human pathogen, its clinical implications are significant in the context of agriculture and food security. The disease manifests as wilting and blackening of blossoms and shoots, leading to substantial economic losses in orchards. In terms of pathogenicity, E. amylovora employs several strategies to invade host plants, including the production of exopolysaccharides that facilitate biofilm formation and the secretion of virulence factors that suppress the plant's immune response. This ability to evade plant defenses is critical for its survival and proliferation. Although E. amylovora does not directly impact human health, its outbreaks can lead to increased use of chemical treatments in agriculture, raising concerns about antimicrobial resistance in the environment. The reliance on antibiotics and other chemical agents to control fire blight may contribute to the development of resistant strains of bacteria, which could have broader implications for both plant and human health. Currently, there are no known medical applications of E. amylovora in terms of probiotics, vaccines, or therapeutics for human use. However, understanding its mechanisms of pathogenicity and interactions with host plants can inform better management practices and disease control strategies in agriculture, ultimately benefiting food production and safety.

Industrial Application

Source: gpt-4o-mini-2024-07-18

The bacterium Erwinia amylovora is primarily known for its role as a plant pathogen, particularly affecting apple and pear trees. However, its potential industrial applications are noteworthy, especially in the fields of biotechnology and pharmaceutical development. One of the significant areas of interest is its ability to produce specific enzymes that can be harnessed for various applications. For instance, the enzymatic activity of E. amylovora can be utilized in biodegradation processes, where it may help in breaking down complex organic materials, thus contributing to waste management solutions. In the realm of biotechnology, the genetic manipulation of E. amylovora could lead to the development of biocontrol agents that target other plant pathogens, thereby reducing the reliance on chemical pesticides. This aligns with the growing demand for sustainable agricultural practices. Moreover, the study of E. amylovora has implications in fermentation processes, where its metabolic pathways could be explored for the production of bioactive compounds. These compounds may have potential applications in the pharmaceutical industry, particularly in the development of new antibiotics or other therapeutic agents. Overall, while Erwinia amylovora is primarily recognized for its pathogenicity, its enzymatic capabilities and potential for genetic manipulation present promising avenues for biofuel production, waste treatment, and pharmaceutical development, making it a microorganism of interest in various industrial sectors.

Phenotypes and Predictions

The table shows the phenotypes and predictions. Cell colors indicate the class of the value. When literature-based data is available, a checkmark (✓) indicates a correct prediction, while an ✗ indicates an incorrect prediction.

Literature-based phenotypes: 9

LLM predicted phenotypes: 3

Phenotype	High-quality annotation	google/palm-2-chat-bison-32k	meta-llama/llama-3-70b-instruct:nitro	mistralai/mixtral-8x7b-instruct:nitro	anthropic/claude-3-haiku:beta	meta-llama/llama-3-8b-instruct:nitro	openchat/openchat-7b	google/gemini-flash-1.5	google/gemini-pro	anthropic/claude-3.5-sonnet	anthropic/claude-3.5-sonnet	openai/gpt-4	openai/gpt-4	openai/gpt-4o	openai/gpt-4o	openai/gpt-3.5-turbo-0125	openai/gpt-3.5-turbo-0125	google/gemini-pro-1.5	google/gemini-pro-1.5	perplexity/llama-3-sonar-small-32k-chat	perplexity/llama-3-sonar-small-32k-chat	mistralai/mistral-7b-instruct	mistralai/mistral-7b-instruct	microsoft/phi-3-mini-128k-instruct	microsoft/phi-3-mini-128k-instruct	google/gemma-7b-it	google/gemma-7b-it	microsoft/wizardlm-2-8x22b	microsoft/wizardlm-2-8x22b
Motility	TRUE	true ✓	true ✓	true ✓	true ✓	true ✓	true ✓	true ✓	true ✓	true ✓	true ✓	false ✗	false ✗	true ✓	true ✓	false ✗	false ✗	true ✓	true ✓	true ✓	true ✓	true ✓	true ✓	true ✓	true ✓	true ✓	true ✓	false ✗	false ✗
Gram staining	gram stain negative	gram stain negative ✓	gram stain negative ✓	gram stain negative ✓	gram stain negative ✓	gram stain negative ✓	gram stain negative ✓	gram stain negative ✓	gram stain negative ✓	N/A	gram stain negative ✓	N/A	gram stain negative ✓	N/A	gram stain negative ✓	N/A	gram stain negative ✓	N/A	gram stain negative ✓	N/A	gram stain negative ✓	N/A	gram stain negative ✓	N/A	gram stain negative ✓	N/A	gram stain negative ✓	N/A	gram stain negative ✓
Aerophilicity	facultatively anaerobic	facultatively anaerobic ✓	aerobic ✗	facultatively anaerobic ✓	N/A	N/A	N/A	N/A	N/A	facultatively anaerobic ✓	facultatively anaerobic ✓	aerobic ✗	aerobic ✗	facultatively anaerobic ✓	facultatively anaerobic ✓	facultatively anaerobic ✓	facultatively anaerobic ✓	facultatively anaerobic ✓	facultatively anaerobic ✓	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A
Extreme environment tolerance	N/A	false	false	false	true	false	false	false	false	false	false	false	false	false	false	false	false	false	false	false	false	false	false	false	false	true	true	false	false
Biofilm formation	TRUE	true ✓	true ✓	true ✓	true ✓	true ✓	true ✓	true ✓	true ✓	true ✓	true ✓	true ✓	true ✓	true ✓	true ✓	true ✓	true ✓	true ✓	true ✓	true ✓	true ✓	true ✓	true ✓	true ✓	true ✓	true ✓	true ✓	true ✓	true ✓
Animal pathogenicity	N/A	false	false	false	false	true	false	false	false	false	false	false	false	false	false	true	true	false	false	true	true	false	false	false	false	true	true	false	false
Biosafety level	biosafety level 1	biosafety level 1 ✓	biosafety level 2 ✗	biosafety level 1 ✓	biosafety level 2 ✗	biosafety level 2 ✗	biosafety level 2 ✗	biosafety level 2 ✗	biosafety level 1 ✓	biosafety level 2 ✗	biosafety level 2 ✗	biosafety level 2 ✗	biosafety level 2 ✗	biosafety level 2 ✗	biosafety level 2 ✗	biosafety level 1 ✓	biosafety level 1 ✓	biosafety level 2 ✗	biosafety level 2 ✗	biosafety level 2 ✗	biosafety level 2 ✗	biosafety level 2 ✗	biosafety level 2 ✗	biosafety level 2 ✗	biosafety level 2 ✗	biosafety level 2 ✗	biosafety level 2 ✗	biosafety level 2 ✗	biosafety level 2 ✗
Health association	N/A	true	true	true	true	true	false	true	true	true	true	true	true	true	true	false	false	true	true	true	true	true	true	true	true	true	true	true	true
Host association	TRUE	false ✗	false ✗	true ✓	false ✗	false ✗	false ✗	false ✗	false ✗	false ✗	false ✗	false ✗	false ✗	false ✗	false ✗	false ✗	false ✗	false ✗	false ✗	true ✓	true ✓	true ✓	true ✓	true ✓	true ✓	false ✗	false ✗	false ✗	false ✗
Plant pathogenicity	TRUE	true ✓	true ✓	true ✓	true ✓	true ✓	true ✓	true ✓	true ✓	true ✓	true ✓	true ✓	true ✓	true ✓	true ✓	true ✓	true ✓	true ✓	true ✓	true ✓	true ✓	true ✓	true ✓	true ✓	true ✓	true ✓	true ✓	true ✓	true ✓
Spore formation	FALSE	false ✓	false ✓	false ✓	false ✓	false ✓	false ✓	false ✓	false ✓	false ✓	false ✓	false ✓	false ✓	false ✓	false ✓	false ✓	false ✓	false ✓	false ✓	false ✓	false ✓	false ✓	false ✓	false ✓	false ✓	false ✓	false ✓	false ✓	false ✓
Hemolysis	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A
Cell shape	bacillus	bacillus ✓	bacillus ✓	bacillus ✓	bacillus ✓	bacillus ✓	bacillus ✓	bacillus ✓	bacillus ✓	bacillus ✓	bacillus ✓	bacillus ✓	bacillus ✓	bacillus ✓	bacillus ✓	bacillus ✓	bacillus ✓	bacillus ✓	bacillus ✓	bacillus ✓	bacillus ✓	bacillus ✓	bacillus ✓	bacillus ✓	bacillus ✓	bacillus ✓	bacillus ✓	bacillus ✓	bacillus ✓

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