Patricia Hernández‐Martínez
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View article: Lack of tolerance development following sublethal Cry1 proteins exposure in <i> Spodoptera exigua <sup>1</sup> </i>
Lack of tolerance development following sublethal Cry1 proteins exposure in <i> Spodoptera exigua <sup>1</sup> </i> Open
BACKGROUND The insecticidal proteins derived from Bacillus thuringiensis Berliner (Bt) have been effectively employed in controlling lepidopteran pests, notably in transgenic crops targeting Spodoptera species. However, concerns have arise…
View article: Downregulation of APN1 and <i>ABCC2</i> mutation in Bt Cry1Ac-resistant <i>Trichoplusia ni</i> are genetically independent
Downregulation of APN1 and <i>ABCC2</i> mutation in Bt Cry1Ac-resistant <i>Trichoplusia ni</i> are genetically independent Open
The resistance to the insecticidal protein Cry1Ac from the bacterium Bacillus thuringiensis (Bt) in the cabbage looper, Trichoplusia ni , has previously been identified to be associated with a frameshift mutation in the ABC transporter ABC…
View article: Receptor interactions of protoxin and activated <scp>Vip3Aa</scp> structural conformations in <scp><i>Spodoptera exigua</i></scp>
Receptor interactions of protoxin and activated <span>Vip3Aa</span> structural conformations in <span><i>Spodoptera exigua</i></span> Open
BACKGROUND The Vip3Aa insecticidal protein, produced by Bacillus thuringiensis , has been effectively used in commercial Bt‐crops to manage lepidopteran pests. Upon ingestion by larvae, the protoxin is processed by midgut proteases into th…
View article: New Paralogs of the Heliothis virescens ABCC2 Transporter as Potential Receptors for Bt Cry1A Proteins
New Paralogs of the Heliothis virescens ABCC2 Transporter as Potential Receptors for Bt Cry1A Proteins Open
The ATP-binding cassette (ABC) transporters are a superfamily of membrane proteins. These active transporters are involved in the export of different substances such as xenobiotics. ABC transporters from subfamily C (ABCC) have also been d…
View article: Mpp23Aa/Xpp37Aa Insecticidal Proteins from Bacillus thuringiensis (Bacillales: Bacillaceae) Are Highly Toxic to Anthonomus grandis (Coleoptera: Curculionidae) Larvae
Mpp23Aa/Xpp37Aa Insecticidal Proteins from Bacillus thuringiensis (Bacillales: Bacillaceae) Are Highly Toxic to Anthonomus grandis (Coleoptera: Curculionidae) Larvae Open
The beetle Anthonomus grandis Boheman, 1843, is the main cotton pest, causing enormous losses in cotton. The breeding of genetically modified plants with A. grandis resistance is seen as an important control strategy. However, the identifi…
View article: In vivo competition assays between Vip3 proteins confirm the occurrence of shared binding sites in Spodoptera littoralis
In vivo competition assays between Vip3 proteins confirm the occurrence of shared binding sites in Spodoptera littoralis Open
Due to their different specificity, the use of Vip3 proteins from Bacillus thuringiensis in combination with the conventionally used Cry proteins in crop protection is being essential to counteract the appearance of insect resistance. Ther…
View article: Alteration of a Cry1A Shared Binding Site in a Cry1Ab-Selected Colony of Ostrinia furnacalis
Alteration of a Cry1A Shared Binding Site in a Cry1Ab-Selected Colony of Ostrinia furnacalis Open
The Asian corn borer, Ostrinia furnacalis (Guenée, 1854), is a highly damaging pest in Asia and the Pacific islands, and larvae feed mainly from corn crops. To determine the suitability of Bt-corn technology for the future control of this …
View article: <em>Bacillus thuringiensis</em> Toxins: Functional Characterization and Mechanism of Action
<em>Bacillus thuringiensis</em> Toxins: Functional Characterization and Mechanism of Action Open
Bacillus thuringiensis (Bt)-based products are the most successful microbial insecticides to date. This entomopathogenic bacterium produces different kinds of proteins whose specific toxicity has been shown against a wide range of insect o…
View article: Hetero-oligomerization of <i>Bacillus thuringiensis</i> Cry1A proteins enhance binding to the ABCC2 transporter of <i>Spodoptera exigua</i>
Hetero-oligomerization of <i>Bacillus thuringiensis</i> Cry1A proteins enhance binding to the ABCC2 transporter of <i>Spodoptera exigua</i> Open
The ATP binding cassette (ABC) transporters are membrane proteins that can act as putative receptors for Cry proteins from Bacillus thuringiensis (Bt) in the midgut of different insects. For the beet armyworm, Spodoptera exigua, ABCC2 and …
View article: The Rapid Evolution of Resistance to Vip3Aa Insecticidal Protein in Mythimna separata (Walker) Is Not Related to Altered Binding to Midgut Receptors
The Rapid Evolution of Resistance to Vip3Aa Insecticidal Protein in Mythimna separata (Walker) Is Not Related to Altered Binding to Midgut Receptors Open
Laboratory selection for resistance of field populations is a well-known and useful tool to understand the potential of insect populations to evolve resistance to insecticides. It provides us with estimates of the frequency of resistance a…
View article: Response Mechanisms of Invertebrates to <i>Bacillus thuringiensis</i> and Its Pesticidal Proteins
Response Mechanisms of Invertebrates to <i>Bacillus thuringiensis</i> and Its Pesticidal Proteins Open
Extensive use of chemical insecticides adversely affects both environment and human health. One of the most popular biological pest control alternatives are bioinsecticides based on Bacillus thuringiensis .
View article: Bacillus thuringiensis Toxins: Functional Characterization and Mechanism of Action
Bacillus thuringiensis Toxins: Functional Characterization and Mechanism of Action Open
Bacillus thuringiensis (Bt)-based products are the most successful microbial insecticides to date [...]
View article: The Independent Biological Activity of Bacillus thuringiensis Cry23Aa Protein Against Cylas puncticollis
The Independent Biological Activity of Bacillus thuringiensis Cry23Aa Protein Against Cylas puncticollis Open
The Cry23Aa/Cry37Aa proteins from Bacillus thuringiensis (Bt) have been described toxic to Cylas puncticollis larvae. In general, it is believed that Cry23Aa and Cry37Aa act jointly to exert the insecticidal activity, while t…
View article: Reduced Membrane-Bound Alkaline Phosphatase Does Not Affect Binding of Vip3Aa in a Heliothis virescens Resistant Colony
Reduced Membrane-Bound Alkaline Phosphatase Does Not Affect Binding of Vip3Aa in a Heliothis virescens Resistant Colony Open
The Vip3Aa insecticidal protein from Bacillus thuringiensis (Bt) is produced by specific transgenic corn and cotton varieties for efficient control of target lepidopteran pests. The main threat to this technology is the evolution of resist…
View article: Reduced levels of membrane-bound alkaline phosphatase in Vip3Aa-resistant<i>Heliothis virescens</i>
Reduced levels of membrane-bound alkaline phosphatase in Vip3Aa-resistant<i>Heliothis virescens</i> Open
The Vip3Aa insecticidal protein from Bacillus thuringiensis (Bt) is produced by specific transgenic corn and cotton varieties for efficient control of target lepidopteran pests. The main threat to this technology is the evolution of resist…
View article: The Spodoptera exigua ABCC2 Acts as a Cry1A Receptor Independently of its Nucleotide Binding Domain II
The Spodoptera exigua ABCC2 Acts as a Cry1A Receptor Independently of its Nucleotide Binding Domain II Open
ABC proteins are primary-active transporters that require the binding and hydrolysis of ATP to transport substrates across the membrane. Since the first report of an ABCC2 transporter as receptor of Cry1A toxins, the number of ABC transpor…
View article: Changes in gene expression and apoptotic response in Spodoptera exigua larvae exposed to sublethal concentrations of Vip3 insecticidal proteins
Changes in gene expression and apoptotic response in Spodoptera exigua larvae exposed to sublethal concentrations of Vip3 insecticidal proteins Open
The insecticidal Vip3 proteins from Bacillus thuringiensis (Bt), along with the classical Bt Cry proteins, are currently used in Bt-crops to control insect pests, since they do not share the same mode of action. Here we characterized the r…
View article: Insecticidal spectrum and mode of action of the Bacillus thuringiensis Vip3Ca insecticidal protein
Insecticidal spectrum and mode of action of the Bacillus thuringiensis Vip3Ca insecticidal protein Open
View article: Unshared binding sites for Bacillus thuringiensis Cry3Aa and Cry3Ca proteins in the weevil Cylas puncticollis (Brentidae)
Unshared binding sites for Bacillus thuringiensis Cry3Aa and Cry3Ca proteins in the weevil Cylas puncticollis (Brentidae) Open