<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0120-2804</journal-id>
<journal-title><![CDATA[Revista Colombiana de Química]]></journal-title>
<abbrev-journal-title><![CDATA[Rev.Colomb.Quim.]]></abbrev-journal-title>
<issn>0120-2804</issn>
<publisher>
<publisher-name><![CDATA[Departamento de Química,  Universidad Nacional de Colombia.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0120-28042021000100003</article-id>
<article-id pub-id-type="doi">10.15446/rev.colomb.quim.v50n1.89105</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Cambios en el perfil protéico de E. coli O157:H7 frente al tratamiento con Ib-M1 e IONP@Ib-M1]]></article-title>
<article-title xml:lang="en"><![CDATA[Changes in the protein profile of E. coli O157: H7 against treatment with Ib-M1 and IONP@Ib-M1]]></article-title>
<article-title xml:lang="pt"><![CDATA[Identificação de alterações no perfil protetor de E. coli O157: H7 contra o tratamento com Ib-M1 e IONP@Ib-M1]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ramíez-Forero]]></surname>
<given-names><![CDATA[Gloria Smith]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Valdivieso-Quintero]]></surname>
<given-names><![CDATA[Wilfredo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ropero-Vega]]></surname>
<given-names><![CDATA[José Luis]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Zafra]]></surname>
<given-names><![CDATA[Germán]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Flórez-Castillo]]></surname>
<given-names><![CDATA[Johanna Marcela]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Santander Facultad de Ciencias Exactas, Naturales y Agropecuarias, Ciencias Básicas y Aplicadas para la Sostenibilidad-CIBAS ]]></institution>
<addr-line><![CDATA[Bucaramanga ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Industrial de Santander  ]]></institution>
<addr-line><![CDATA[Bucaramanga ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>04</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>04</month>
<year>2021</year>
</pub-date>
<volume>50</volume>
<numero>1</numero>
<fpage>3</fpage>
<lpage>12</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0120-28042021000100003&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0120-28042021000100003&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0120-28042021000100003&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Escherichia coli 0157:H7 es una bacteria patógena reconocida por su capacidad de resistencia a diversos antibióticos; razón por la cual, se generan complicaciones en el tratamiento de infecciones producidas por esta bacteria. El péptido Ib-M1 y el bioconjugado I0NP@Ib-M1 han surgido como una nueva alternativa antimicrobiana contra E. coli 0157:H7. El mecanismo de acción de Ib-Mi e I0NP@Ib-M1 contra esta bacteria aún es desconocido; por lo tanto, el objetivo de esta investigación fue identificar el cambio en el perfil de proteínas de E. coli 0157:H7 luego del tratamiento con Ib-M1 e I0NP@ Ib-M1 como primer paso para determinar su mecanismo de acción. Para esto, se llevó a cabo la obtención de proteínas, posteriormente se realizó una electroforesis bidimensional para finalmente realizar la determinación de la variabilidad de los perfiles proteicos. Una vez obtenidos estos perfiles, se llevó a cabo un análisis de varianza (AN0VA). Se identificaron 72 proteínas expresadas diferencialmente, las cuales pueden relacionarse con el efecto sobre el crecimiento de la bacteria en presencia de Ib-M1 e I0NP@Ib-M. Estas proteínas se encuentran involucradas en procesos de transferencia de grupos acilo (proteína Yhbs), translocación de lipoproteínas (proteína LolA) y transporte de aminoácidos (proteína GpmA), entre otros.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Escherichia coli 0157: H7 is a pathogenic bacterium which is recognized for the ability to resist multiple antibiotics; accordingly, complications occur in the treatment of infections caused by this bacterium. The Ib-M1 peptide and the I0NP @ Ib-M1 bioconjugate have emerged as a new antimicrobial alternatives against E. coli 0157: H7. The mechanism of action of Ib-M1 and I0NP @ Ib-M1 against this bacterium is still unknown; therefore, the goal of this research was to identify the change in the proteins profile of E. coli 0157: H7 after treatment with Ib-M1 and I0NP @ Ib-M1 as a first step to determine its mechanism of action. For this, the proteins were obtained first, and then a two-dimensional electrophoresis was performed to finally determine the variability of the protein profiles. 0nce the protein profiles were obtained, an analysis of variance (AN0VA) was carried out. 72 differentially expressed proteins were identified, which can be connected to the effect on the bacterium's growth in the presence of Ib-M1 and I0NP @ Ib-M. These proteins are involved in acyl groups transfer processes (Yhbs protein), lipoprotein translocation (LolA protein) and amino acid transport (GpmA protein), among others.]]></p></abstract>
<abstract abstract-type="short" xml:lang="pt"><p><![CDATA[Resumo Escherichia coli O157: H7 é uma bactéria patogênica reconhecida por sua capacidade de resistir a vários antibióticos; razão pela qual, complicações são geradas no tratamento de infecções produzidas por essa bactéria. O peptídeo Ib-M1 livre e imobilizado em nanopartículas magnéticas de óxido de ferro (IONP @ Ib-M1) surgiu como uma nova alternativa antimicrobiana contra E. coli O157: H7 e isolados clínicos desta bactéria. O mecanismo de ação de Ib-M1 e IONP @ Ib-M1 contra E. coli O157: H7 ainda é desconhecido; Portanto, o objetivo desta pesquisa foi identificar a alteração no perfil proteico de E. coli O157: H7 após o tratamento com Ib-M1 e IONP @ Ib-M1 como um primeiro passo para determinar seu mecanismo de ação. Para isso, foi realizada a obtenção das proteínas, posteriormente foi realizada uma eletroforese bidimensional para finalmente determinar a variabilidade dos perfis protéicos. Uma vez obtidos os perfis de proteínas, foi realizada uma análise de variância (ANOVA). Os resultados mostram a identificação de proteínas expressas diferencialmente e que estão envolvidas em processos de transferência de grupos acila (proteína Yhbs), translocação de lipoproteínas (proteína LolA) e transporte de aminoácidos (proteína GpmA), entre outros.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Escherichia coli 0157:H7]]></kwd>
<kwd lng="es"><![CDATA[análisis proteómico]]></kwd>
<kwd lng="es"><![CDATA[péptidos antimicrobianos]]></kwd>
<kwd lng="es"><![CDATA[Ib-M1]]></kwd>
<kwd lng="en"><![CDATA[Escherichia coli O157: H7]]></kwd>
<kwd lng="en"><![CDATA[proteomic analysis]]></kwd>
<kwd lng="en"><![CDATA[antimicrobial peptides]]></kwd>
<kwd lng="en"><![CDATA[Ib-M1]]></kwd>
<kwd lng="pt"><![CDATA[Escherichia coli 0157: H7]]></kwd>
<kwd lng="pt"><![CDATA[análise proteômica]]></kwd>
<kwd lng="pt"><![CDATA[peptídeos antimicrobianos]]></kwd>
<kwd lng="pt"><![CDATA[Ib-M1]]></kwd>
</kwd-group>
</article-meta>
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