<?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>0375-0760</journal-id>
<journal-title><![CDATA[Revista Cubana de Medicina Tropical]]></journal-title>
<abbrev-journal-title><![CDATA[Rev Cubana Med Trop]]></abbrev-journal-title>
<issn>0375-0760</issn>
<publisher>
<publisher-name><![CDATA[Centro Nacional de Información de Ciencias Médicas]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0375-07602005000100009</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Expresión en Escherichia coli del gen gspd l del sistema de secreción tipo II de Leptospira borgpetersenii serovariedad hardjo*<a name=asterisco></a>]]></article-title>
<article-title xml:lang="en"><![CDATA[Expression in Escherichia coli of the gspd l gene of the type II secretion system in Leptospira borgpetersenii serovariety hardjo]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rodríguez Reyes]]></surname>
<given-names><![CDATA[Ernesto Armando]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cullen]]></surname>
<given-names><![CDATA[Paul]]></given-names>
</name>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Bulach]]></surname>
<given-names><![CDATA[Dieter]]></given-names>
</name>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Adler]]></surname>
<given-names><![CDATA[Ben]]></given-names>
</name>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Haake]]></surname>
<given-names><![CDATA[David]]></given-names>
</name>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[de la Peña-Moctezuma]]></surname>
<given-names><![CDATA[Alejandro]]></given-names>
</name>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Facultad de Medicina Veterinaria y Zootecnia  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>04</month>
<year>2005</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>04</month>
<year>2005</year>
</pub-date>
<volume>57</volume>
<numero>1</numero>
<fpage>45</fpage>
<lpage>46</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S0375-07602005000100009&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S0375-07602005000100009&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S0375-07602005000100009&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Se clonó un fragmento de 1,539 pb del gen homólogo a gspD de hardjobovis en el vector pET28a y fue transformado en E. coli cepas C43 y Rosetta. La secuencia de GspD L mostró 46 % de similitud con la secretina GspD de E. coli. La expresión de GspD L recombinante fue lograda en la cepa Rosetta.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[A fragment of 1.539 pb of the gene homologous to gspD of Hardjobovis was clonated in the pET28a vector and it was transformed into E. coli C43 and Rosetta strains. The sequence of GspD L showed 46 % of similitude with E. coli GspD secretin. The expression of recombinant GspDL was obtained in Rosetta strain.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Leptospira]]></kwd>
<kwd lng="es"><![CDATA[sistema de secreción]]></kwd>
<kwd lng="es"><![CDATA[E. coli]]></kwd>
<kwd lng="en"><![CDATA[Lepsotspira]]></kwd>
<kwd lng="en"><![CDATA[secretion system]]></kwd>
<kwd lng="en"><![CDATA[E. coli]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[ <div class=Section1>    <h5 class=MsoNormal><span lang=PT-BR style='mso-ansi-language:PT-BR'><a href="mtrsu105.htm">Índice</a>      <a href="mtr08105.htm">Anterior</a> <a href="mtr10105.htm">Siguiente</a>    <br>     </span><span lang=ES>REV CUBANA MED TROP 2005<span class=GramE>;57</span>(1):45-6</span><span lang=PT-BR style='mso-ansi-language:PT-BR'></span></h5>       <p class=MsoNormal><a href="mtr09105.pdf"><img src="pdf.gif" width="24" height="23" border="0">      Formato PDF </a></p>       <p class=MsoNormal><span lang=ES>Facultad de Medicina Veterinaria y Zootecnia,      <span class=SpellE>U.N.A.M</span>., México</span></p>   <h2 class=MsoNormal><span lang=ES>Expresión en <i>Escherichia coli </i>del gen      <span class=SpellE><i>gspd<sub>l</sub></i></span> del sistema de secreción tipo II de      <i>Leptospira <span class=SpellE>borgpetersenii</span></i> <span class=SpellE>serovariedad</span>      <span class=SpellE>hardjo</span></span><span style='mso-ansi-language:ES-MX'><a href="#nota">*</a><a name="asterisco"></a></span></h2>       <p class=MsoNormal><span lang=ES><a href="#creditos">Dr. Ernesto Armando Rodríguez      Reyes<span class=GramE>,<sup>1</sup></span> Dr. <span class=SpellE>Paul</span> <span class=SpellE>Cullen</span>,<sup>2</sup> Dr. <span class=SpellE>Dieter</span> <span class=SpellE>Bulach</span>,<sup>2</sup> Dr. <span class=SpellE>Ben</span> <span class=SpellE>Adler</span>,<sup>3</sup> Dr. David Haake<sup>4 </sup>y Dr. <span style='mso-bidi-font-weight:bold'>Alejandro de la Peña-Moctezuma</span><sup>5</sup>      </a><a name="autores"></a></span></p>   <h4 class=MsoNormal><span lang=ES>Resumen</span></h4>       <p class=MsoNormal><span lang=ES>Se clonó un fragmento de 1,539 <span class=SpellE>pb</span> del gen homólogo a <span class=SpellE><i>gspD</i></span><i>      </i>de <span class=SpellE>hardjobovis</span> en el vector <span class=SpellE>pET28a</span>      y fue transformado en <i>E. coli</i> cepas C43 y <span class=SpellE>Rosetta</span>.      La secuencia de <span class=SpellE>GspD<sub>L</sub></span> mostró 46 % de      similitud con la secretina <span class=SpellE>GspD</span> de <i>E. coli</i>.      L</span><span style='mso-ansi-language:ES-MX'>a expresión de <span class=SpellE>GspD<i><sub>L</sub></i></span>      <span class=SpellE>recombinante</span> fue lograda en la cepa <span class=SpellE>Rosetta</span>.</span><span lang=ES></span></p>       <p class=MsoNormal><span style='mso-ansi-language:ES-MX'><b>Palabras clave</b>:      <i style='mso-bidi-font-style:normal'>Leptospira</i>, sistema de secreción, <i style='mso-bidi-font-style:normal'>E. coli</i>.</span></p>       <p class=MsoNormal>&nbsp;</p>       <p class=MsoNormal><i><span lang=ES>Leptospira <span class=SpellE>borgpetersenii</span></span></i><span lang=ES> <span class=SpellE>hardjo</span> (<span class=SpellE>Hardjobovis</span>)      produce infertilidad, agalactia y aborto en bovinos así como infección en      humanos.<sup>1<span class=GramE>,2</span></sup> El <span class=SpellE>proteoma</span>      de la membrana externa de <i>L. <span class=SpellE>interrogans</span> </i><span class=SpellE>Lai</span> sugirió 8 proteínas nuevas.<sup>3-7</sup> La secuencia      parcial de aminoácidos de una (<span class=SpellE>pL18</span>) mostró homología      con <span class=SpellE>GspG</span>, una proteína del sistema de secreción      tipo II (GSP) en <i>E. coli</i><span style='mso-bidi-font-style:italic'>.</span><sup>3,8</sup></span></p>       <p class=MsoNormal><span lang=ES>A partir del gen homólogo a <span class=SpellE><i>gspD</i></span><i> </i>de <span class=SpellE>Hardjobovis</span>      (3 marcos de lectura arriba de <span class=SpellE><i>gspG</i></span>) se amplificaron      1,539 <span class=SpellE>pb</span>. El fragmento, clonado en el vector <span class=SpellE>pET28a</span>,      fue transformado en <i>E. coli </i>DE3 cepas: C43 y <span class=SpellE>Rosetta</span>.<i>      </i>El <span class=SpellE>plásmido</span> <span class=SpellE>recombinante</span>      <span class=SpellE>pAL208</span> fue secuenciado para confirmación del <span class=SpellE>constructo</span>.      <i>E. coli</i> <span class=SpellE>recombinante</span> fue cultivada con kanamicina      (50 <span class=SpellE>mg</span>/<span class=SpellE>mL</span>) y glucosa (0,1      a 2 %) a 37 <span class=SpellE>°C</span> durante 1 h en agitación y entonces      inducida con IPTG (0,5 a 10 <span class=SpellE>mM</span>) durante 3,5 h a      37 <span class=SpellE>°C</span> o temperatura ambiente. Los cultivos fueron <span class=SpellE>sonicados</span> y sus proteínas separadas en <span class=SpellE>geles</span>      <span class=SpellE>desnaturalizantes</span> de <span class=SpellE>poliacrilamida</span>      (12 %). Se realizó <span class=SpellE>inmunodetección</span> tipo <span class=SpellE>Western</span> con anticuerpos monoclonales <span class=SpellE>anti</span>-T7      y <span class=SpellE>anti</span>-histidina.</span></p>       ]]></body>
<body><![CDATA[<p class=MsoNormal><span lang=ES>La secuencia de <span class=SpellE>GspD<sub>L</sub></span>      mostró 46 % de similitud con la secretina <span class=SpellE>GspD</span> de      <i>E. coli</i>. Analizando la secuencia <span class=SpellE>nucleotídica</span>,      se observó que el uso de <span class=SpellE>codones</span> para <span class=SpellE>arginina</span> en <i>L.</i> <span class=SpellE><i>borgpetersenii</i></span>      es: </span><span style='mso-ansi-language:ES-MX;mso-bidi-font-weight:bold'>AGA</span><span style='mso-ansi-language:ES-MX'>–45,45 %; <span style='mso-bidi-font-weight: bold'>AGG</span>–18,18 % y <span style='mso-bidi-font-weight:bold'>CGA</span>–18,18      %; mientras que en <i>E. coli</i> es: <span style='mso-bidi-font-weight:bold'>AGA</span>–3,9      %; <span style='mso-bidi-font-weight:bold'>AGG</span>–2,2 % y <span style='mso-bidi-font-weight:bold'>CGA</span>–3,9 %. </span><span lang=ES>La <span class=SpellE>inmunodetección</span> de <span class=SpellE>GspD<sub>L</sub></span>      fue negativa en la cepa C43. </span><span style='mso-ansi-language:ES-MX'>Se      utilizó entonces la cepa <span class=SpellE>Rosetta</span> <span class=SpellE>codon</span>      plus cultivada con 0,2 % de glucosa a 37 <span class=SpellE>°C</span> durante      50 <span class=SpellE>min</span> e inducida con 10 <span class=SpellE>mM</span>      de IPTG durante 3,5 h en agitación, para lograr la expresión de <span class=SpellE>GspD<i><sub>L</sub></i></span> <span class=SpellE>recombinante</span>      (66,7 <span class=SpellE>kDa</span>).</span><span lang=ES></span></p>       <p class=MsoNormal><span lang=ES>A los autores de este trabajo les interesaba      entender el papel que desempeñan en <i>Leptospira</i> las proteínas del GSP,      en particular su potencial como <span class=SpellE>inmunógenos</span> y maquinaria      de secreción. </span><span style='mso-ansi-language:ES-MX'>La purificación      de <span class=SpellE>GspD</span></span><i><sub><span lang=ES>L</span></sub></i><span style='mso-ansi-language:ES-MX'> <span class=SpellE>recombinante</span> permitirá      producir anticuerpos para ensayos de <span class=SpellE>opsonofagocitosis</span>      de <i>L. <span class=SpellE>borgpetersenii</span></i> y para corroborar la      localización de <span class=SpellE>GspD<sub>L</sub></span> sobre la superficie      de <i>Leptospira</i>.</span><span lang=ES></span></p>       <p class=MsoNormal>&nbsp;</p>   <h2 class=MsoNormal><span lang=EN-US style='mso-ansi-language:EN-US'>Expression      in <i style='mso-bidi-font-style:normal'>Escherichia coli</i> of the <span class=SpellE><i style='mso-bidi-font-style:normal'>gspd<sub>l</sub></i></span><i style='mso-bidi-font-style:normal'><sub> </sub></i>gene of the type II secretion      system in <i style='mso-bidi-font-style:normal'>Leptospira <span class=SpellE>borgpetersenii</span></i> <span class=SpellE>serovariety</span> <span class=SpellE>hardjo</span></span></h2>   <h4 class=MsoNormal><span lang=EN-US style='mso-ansi-language:EN-US'>Summary</span></h4>       <p class=MsoNormal><span lang=EN-US style='mso-ansi-language:EN-US'>A fragment      of 1.539 <span class=SpellE><span class=GramE>pb</span></span> of the gene      homologous to <span class=SpellE>gspD</span> of <span class=SpellE>Hardjobovis</span>      was <span class=SpellE>clonated</span> in the pET28a vector and it was transformed      into <i style='mso-bidi-font-style:normal'>E. coli</i> C43 and Rosetta strains.      The sequence of <span class=SpellE>GspD<sub>L</sub></span> showed 46 % of      similitude with <i style='mso-bidi-font-style:normal'>E. coli</i> <span class=SpellE>GspD</span>      <span class=SpellE>secretin</span>. The expression of recombinant <span class=SpellE>GspD<i style='mso-bidi-font-style: normal'><sub>L</sub></i></span> was obtained in Rosetta strain.</span></p>       <p class=MsoNormal><span lang=EN-US style='mso-ansi-language:EN-US'><b>Key words</b>:      <span class=SpellE>Lepsotspira</span>, secretion system, <i style='mso-bidi-font-style: normal'>E. coli</i>.</span></p>       <!-- ref --><p class=MsoNormal>&nbsp;<!-- ref -->Faine</span></span><span      lang=EN-US style='mso-ansi-language:EN-US'> S, Adler B, Bolin C, <span      class=SpellE>Perolat</span> P. <i>Leptospira </i>and <span class=SpellE>Leptospirosis</span>.        2nd. ed. </span><st1:City><st1:place><span lang=EN-US style='mso-ansi-language:        EN-US'>Melbourne</span></st1:place></st1:City><span lang=EN-US      style='mso-ansi-language:EN-US'>: <span class=SpellE>MediSci</span>; 1999.</span><span      lang=ES> </span></li>     <li class=MsoNormal style='mso-list:l0 level1 lfo2;'><span      lang=EN-US style='mso-ansi-language:EN-US'>    <!-- ref -->Cullen PA, <span class=SpellE>Cordwell</span>        SJ, <span class=SpellE>Bulach</span> DM, <span class=SpellE>Haake</span>        DA, Adler B. Global analysis of outer membrane proteins from <i>Leptospira        <span class=SpellE>interrogans</span></i> <span class=SpellE>serovar</span>        Lai. <span style='mso-bidi-font-style:italic'>Infect <span class=SpellE>Immun</span>        </span>2002<span class=GramE>;<span style='mso-bidi-font-style:italic'>70</span>:2311</span>-8.        </span></li>     <li class=MsoNormal style='mso-list:l0 level1 lfo2;'><span      lang=EN-US style='mso-ansi-language:EN-US'>    <!-- ref -->Cullen PA, <span class=SpellE>Haake</span>        DA, <span class=SpellE>Bulach</span> DM, <span class=SpellE>Zuerner</span>        RL, Adler B. LipL21 is a novel surface-exposed lipoprotein of pathogenic        <i>Leptospira </i>species. <span style='mso-bidi-font-style:italic'>Infect        <span      class=SpellE>Immun</span> </span>2003<span class=GramE>;<span      style='mso-bidi-font-style:italic'>71</span>:2414</span>-21. </span></li>     <li class=MsoNormal style='mso-list:l0 level1 lfo2;'><span      class=SpellE><span lang=EN-US style='mso-ansi-language:EN-US'>    <!-- ref -->Guerreiro</span></span><span      lang=EN-US style='mso-ansi-language:EN-US'> H, <span class=SpellE>Croda</span>        J, Flannery B, <span class=SpellE>Mazel</span> M, <span class=SpellE>Matsunaga</span>        J, <span class=SpellE>Galváo</span> Reis, et al. <span class=SpellE>Leptospiral</span>        proteins recognized during the <span class=SpellE>humoral</span> immune        response to <span class=SpellE>leptospirosis</span> in humans. </span><span      class=SpellE><span lang=ES style='mso-bidi-font-style:italic'>Infect</span></span><span      lang=ES style='mso-bidi-font-style:italic'> <span class=SpellE>Immun</span></span><span      lang=ES> 2001<span class=GramE>;<span style='mso-bidi-font-style:italic'>69</span>:4958</span>-68.        </span></li>     <li class=MsoNormal style='mso-list:l0 level1 lfo2;'><span      class=SpellE><span lang=EN-US style='mso-ansi-language:EN-US'>    <!-- ref -->Haake</span></span><span      lang=EN-US style='mso-ansi-language:EN-US'> D, <span class=SpellE>Mazel</span>        A, McCoy F, <span class=SpellE>Milward</span> G, <span class=SpellE>Chao</span>        J, <span class=SpellE>Matsunaga</span> J, et al. </span><span lang=ES>Leptospira</span><span      lang=EN-US style='mso-ansi-language:EN-US'>l outer membrane proteins OmpL1        and LipL41 exhibit synergistic <span class=SpellE>immunoprotection</span>.        International <span class=SpellE>Leptospirosis</span> Society, Second Meeting.        </span><st1:place><st1:City><span lang=EN-US style='mso-ansi-language:        EN-US'>Marysville</span></st1:City><span lang=EN-US style='mso-ansi-language:       EN-US'>, </span><st1:State><span lang=EN-US style='mso-ansi-language:        EN-US'>Victoria</span></st1:State><span lang=EN-US style='mso-ansi-language:       EN-US'>, </span><st1:country-region><span lang=EN-US style='mso-ansi-language:        EN-US'>Australia</span></st1:country-region></st1:place><span      lang=EN-US style='mso-ansi-language:EN-US'>. </span><st1:country-region><st1:place><span        class=SpellE><span lang=EN-US style='mso-ansi-language:EN-US'>Australia</span></span></st1:place></st1:country-region><span      class=SpellE><span class=GramE><span lang=EN-US style='mso-ansi-language:      EN-US'>:Intervet</span></span></span><span lang=EN-US style='mso-ansi-language:      EN-US'>, CLS Veterinary, Pan Bio, Bio Scientific; 1999. p. 22. </span></li>     <li class=MsoNormal style='mso-list:l0 level1 lfo2;'><span      class=SpellE><span lang=EN-US style='mso-ansi-language:EN-US'>    <!-- ref -->Haake</span></span><span      lang=EN-US style='mso-ansi-language:EN-US'> DA, <span class=SpellE>Chao</span>        G, <span class=SpellE>Zuerner</span> RL, Barnett JK, Barnett D, <span      class=SpellE>Mazel</span> M, et al. The <span class=SpellE>leptospiral</span>        major outer membrane protein LipL32 is a lipoprotein expressed during mammalian        infection. <span style='mso-bidi-font-style:italic'>Infect <span      class=SpellE>Immun</span></span> 2000<span class=GramE>;<span      style='mso-bidi-font-style:italic'>68</span>:2276</span>-85. </span></li>     <li class=MsoNormal style='mso-list:l0 level1 lfo2;'><span      class=SpellE><span lang=EN-US style='mso-ansi-language:EN-US'>    <!-- ref -->Tauschek</span></span><span      lang=EN-US style='mso-ansi-language:EN-US'> M, <span class=SpellE>Gorrell</span>        RJ, <span class=SpellE>Strugnell</span> RA, Robins-Browne RM. Identification        of a protein <span class=SpellE>secretory</span> pathway for the secretion        of heat-labile <span class=SpellE>enterotoxin</span> by an <span class=SpellE>enterotoxigenic</span>        strain of <i>Escherichia coli</i>. <span style='mso-bidi-font-style:italic'>Proc        Nat <span class=SpellE>Acad</span> <span class=SpellE>Sci</span> USA </span>2002<span class=GramE>;<span      style='mso-bidi-font-style:italic'>99</span>:7066</span>-71. </span></li>    </ol>       <p class=MsoNormal><span lang=ES>Recibido: 27 de diciembre de 2004. Aprobado:      10 de marzo de 2005.    <br>     </span><span lang=ES>Dr. <i>Alejandro de la Pe&ntilde;a-Moctezuma</i>. Facultad      de Medicina Veterinaria y Zootecnia, <span class=SpellE>U.N.A.M</span>., México.</span></p>       <p class=MsoNormal><span style='mso-ansi-language:ES-MX'><a href="#asterisco">*      </a></span><a href="#asterisco"><span lang=ES>Proyecto financiado por la <span class=SpellE>U.N.A.M</span>. (PAPIIT      IN205202) y UC-MEXUS-CONACYT (CN-02-54).</span></a><span lang=ES><a name="nota"></a></span></p>       <p class=MsoNormal><sup><span lang=ES><a href="#autores">1 </a></span></sup><a href="#autores"><span class=SpellE><span lang=ES>Máster</span></span><span lang=ES> en Ciencias. Facultad de Medicina Veterinaria      y Zootecnia, <span class=SpellE>U.N.A.M</span>., México.    <br>     </span></a><a href="#autores"><sup><span style='mso-ansi-language:ES-MX'>2      </span></sup><span style='mso-ansi-language:ES-MX'>Doctor en Medicina. </span><span lang=ES>Departamento      de Microbiología Universidad de <span class=SpellE>Monash</span>, <span class=SpellE>Clayton</span>, Victoria, Australia.    <br>     </span></a><a href="#autores"><sup><span lang=ES>3 </span></sup><span lang=ES>Doctor      en Medicina. Profesor. Departamento de Microbiología. Universidad de <span class=SpellE>Monash</span>, <span class=SpellE>Clayton</span>, Victoria, Australia.    ]]></body>
<body><![CDATA[<br>     </span></a><a href="#autores"><sup><span lang=ES>4 </span></sup><span lang=ES>Doctor      en Medicina. Profesor. División de Enfermedades Infecciosas, Universidad de      California, Los Ángeles, EE. UU.    <br>     </span></a><a href="#autores"><sup><span lang=ES>5</span></sup><span lang=ES>      Médico Veterinario. Facultad de Medicina Veterinaria y Zootecnia, <span class=SpellE>U.N.A.M</span>.,      México.</span></a><span lang=ES><a name="creditos"></a></span></p>   <h5 class=MsoNormal><span lang=PT-BR style='mso-ansi-language:PT-BR'><a href="mtrsu105.htm">Índice</a>      <a href="mtr08105.htm">Anterior</a> <a href="mtr10105.htm">Siguiente</a></span></h5>   </div>      ]]></body><back>
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