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  1. Artikel ; Online: Streptococcus pyogenes polymyxin B-resistant mutants display enhanced ExPortal integrity.

    Port, Gary C / Vega, Luis A / Nylander, Andrew B / Caparon, Michael G

    Journal of bacteriology

    2014  Band 196, Heft 14, Seite(n) 2563–2577

    Abstract: The ExPortal protein secretion organelle in Streptococcus pyogenes is an anionic phospholipid-containing membrane microdomain enriched in Sec translocons and postsecretion protein biogenesis factors. Polymyxin B binds to and disrupts ExPortal integrity, ... ...

    Abstract The ExPortal protein secretion organelle in Streptococcus pyogenes is an anionic phospholipid-containing membrane microdomain enriched in Sec translocons and postsecretion protein biogenesis factors. Polymyxin B binds to and disrupts ExPortal integrity, resulting in defective secretion of several toxins. To gain insight into factors that influence ExPortal organization, a genetic screen was conducted to select for spontaneous polymyxin B-resistant mutants displaying enhanced ExPortal integrity. Whole-genome resequencing of 25 resistant mutants revealed from one to four mutations per mutant genome clustered primarily within a core set of 10 gene groups. Construction of mutants with individual deletions or insertions demonstrated that 7 core genes confer resistance and enhanced ExPortal integrity through loss of function, while 3 were likely due to gain of function and/or combinatorial effects. Core resistance genes include a transcriptional regulator of lipid biosynthesis, several genes involved in nutrient acquisition, and a variety of genes involved in stress responses. Two members of the latter class also function as novel regulators of the secreted SpeB cysteine protease. Analysis of the most frequently isolated mutation, a single nucleotide deletion in a track of 9 consecutive adenine residues in pstS, encoding a component of a high-affinity Pi transporter, suggests that this sequence functions as a molecular switch to facilitate stress adaptation. Together, these data suggest the existence of a membrane stress response that promotes enhanced ExPortal integrity and resistance to cationic antimicrobial peptides.
    Mesh-Begriff(e) Anti-Bacterial Agents/pharmacology ; Carbohydrate Metabolism ; DNA, Bacterial/genetics ; Drug Resistance, Bacterial ; Gene Expression Regulation, Bacterial ; Genome, Bacterial ; Mutation ; Organelles/metabolism ; Polymyxin B/pharmacology ; Protein Transport ; Streptococcus pyogenes/drug effects ; Streptococcus pyogenes/genetics ; Streptococcus pyogenes/metabolism ; Stress, Physiological
    Chemische Substanzen Anti-Bacterial Agents ; DNA, Bacterial ; Polymyxin B (J2VZ07J96K)
    Sprache Englisch
    Erscheinungsdatum 2014-05-02
    Erscheinungsland United States
    Dokumenttyp Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't
    ZDB-ID 2968-3
    ISSN 1098-5530 ; 0021-9193
    ISSN (online) 1098-5530
    ISSN 0021-9193
    DOI 10.1128/JB.01596-14
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  2. Artikel: Streptococcus pyogenes Polymyxin B-Resistant Mutants Display Enhanced ExPortal Integrity

    Port, Gary C / Vega, Luis A / Nylander, Andrew B / Caparon, Michael G

    Journal of bacteriology. 2014 July 15, v. 196, no. 14

    2014  

    Abstract: The ExPortal protein secretion organelle in Streptococcus pyogenes is an anionic phospholipid-containing membrane microdomain enriched in Sec translocons and postsecretion protein biogenesis factors. Polymyxin B binds to and disrupts ExPortal integrity, ... ...

    Abstract The ExPortal protein secretion organelle in Streptococcus pyogenes is an anionic phospholipid-containing membrane microdomain enriched in Sec translocons and postsecretion protein biogenesis factors. Polymyxin B binds to and disrupts ExPortal integrity, resulting in defective secretion of several toxins. To gain insight into factors that influence ExPortal organization, a genetic screen was conducted to select for spontaneous polymyxin B-resistant mutants displaying enhanced ExPortal integrity. Whole-genome resequencing of 25 resistant mutants revealed from one to four mutations per mutant genome clustered primarily within a core set of 10 gene groups. Construction of mutants with individual deletions or insertions demonstrated that 7 core genes confer resistance and enhanced ExPortal integrity through loss of function, while 3 were likely due to gain of function and/or combinatorial effects. Core resistance genes include a transcriptional regulator of lipid biosynthesis, several genes involved in nutrient acquisition, and a variety of genes involved in stress responses. Two members of the latter class also function as novel regulators of the secreted SpeB cysteine protease. Analysis of the most frequently isolated mutation, a single nucleotide deletion in a track of 9 consecutive adenine residues in pstS, encoding a component of a high-affinity Pi transporter, suggests that this sequence functions as a molecular switch to facilitate stress adaptation. Together, these data suggest the existence of a membrane stress response that promotes enhanced ExPortal integrity and resistance to cationic antimicrobial peptides.
    Schlagwörter Streptococcus pyogenes ; adenine ; antimicrobial cationic peptides ; bacteriology ; biogenesis ; biosynthesis ; cysteine proteinases ; genes ; mutants ; polymyxin B ; protein secretion ; sequence deletion ; stress response ; toxins ; transcription factors
    Sprache Englisch
    Erscheinungsverlauf 2014-0715
    Umfang p. 2563-2577.
    Erscheinungsort American Society for Microbiology
    Dokumenttyp Artikel
    ZDB-ID 2968-3
    ISSN 1098-5530 ; 0021-9193
    ISSN (online) 1098-5530
    ISSN 0021-9193
    DOI 10.1128/JB.01596-14
    Datenquelle NAL Katalog (AGRICOLA)

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  3. Artikel ; Online: Associations between time spent traveling in motor vehicles and physical activity in Colombian adults from urban areas.

    Paez, Diana C / Gomez, Luis F / Mallarino, Christina / Arango, Carlos M / Flórez, Alberto / Nylander, Andrew / Parra, Diana C

    Cadernos de saude publica

    2014  Band 30, Heft 11, Seite(n) 2320–2330

    Abstract: Sedentary behaviors are associated with less physical activity. Little evidence exists about this association and its relation with commuting time in Latin America. This study examined the association between time spent traveling in motor vehicles and ... ...

    Abstract Sedentary behaviors are associated with less physical activity. Little evidence exists about this association and its relation with commuting time in Latin America. This study examined the association between time spent traveling in motor vehicles and physical activity levels in the domains of leisure time physical activity and transportation, among Colombian adults in urban areas. A secondary data analysis of the 2010 National Nutrition Survey was conducted. Time spent traveling in motor vehicles and physical activity were assessed using the International Physical Activity Questionnaire. Binary logistic regressions were conducted. Time spent traveling in motor vehicles for 120 minutes or more was reported among 27.6% of the sample. The prevalence of walking and bicycling as a means of transportation for at least 150 minutes per week was 34% and 4.4%, respectively. Achieving at least 150 minutes of leisure time physical activity a week was reported by 18.4% of the sample. This study suggests negative associations between time spent traveling in motor vehicles and active transport, with significant trend associations in stratified analyses. No significant associations were found between time spent traveling in motor vehicles and leisure time physical activity.
    Sprache Englisch
    Erscheinungsdatum 2014-12-01
    Erscheinungsland Brazil
    Dokumenttyp Journal Article
    ZDB-ID 1115730-6
    ISSN 1678-4464 ; 0102-311X
    ISSN (online) 1678-4464
    ISSN 0102-311X
    DOI 10.1590/0102-311x00197513
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  4. Artikel ; Online: Drosophila muller f elements maintain a distinct set of genomic properties over 40 million years of evolution.

    Leung, Wilson / Shaffer, Christopher D / Reed, Laura K / Smith, Sheryl T / Barshop, William / Dirkes, William / Dothager, Matthew / Lee, Paul / Wong, Jeannette / Xiong, David / Yuan, Han / Bedard, James E J / Machone, Joshua F / Patterson, Seantay D / Price, Amber L / Turner, Bryce A / Robic, Srebrenka / Luippold, Erin K / McCartha, Shannon R /
    Walji, Tezin A / Walker, Chelsea A / Saville, Kenneth / Abrams, Marita K / Armstrong, Andrew R / Armstrong, William / Bailey, Robert J / Barberi, Chelsea R / Beck, Lauren R / Blaker, Amanda L / Blunden, Christopher E / Brand, Jordan P / Brock, Ethan J / Brooks, Dana W / Brown, Marie / Butzler, Sarah C / Clark, Eric M / Clark, Nicole B / Collins, Ashley A / Cotteleer, Rebecca J / Cullimore, Peterson R / Dawson, Seth G / Docking, Carter T / Dorsett, Sasha L / Dougherty, Grace A / Downey, Kaitlyn A / Drake, Andrew P / Earl, Erica K / Floyd, Trevor G / Forsyth, Joshua D / Foust, Jonathan D / Franchi, Spencer L / Geary, James F / Hanson, Cynthia K / Harding, Taylor S / Harris, Cameron B / Heckman, Jonathan M / Holderness, Heather L / Howey, Nicole A / Jacobs, Dontae A / Jewell, Elizabeth S / Kaisler, Maria / Karaska, Elizabeth A / Kehoe, James L / Koaches, Hannah C / Koehler, Jessica / Koenig, Dana / Kujawski, Alexander J / Kus, Jordan E / Lammers, Jennifer A / Leads, Rachel R / Leatherman, Emily C / Lippert, Rachel N / Messenger, Gregory S / Morrow, Adam T / Newcomb, Victoria / Plasman, Haley J / Potocny, Stephanie J / Powers, Michelle K / Reem, Rachel M / Rennhack, Jonathan P / Reynolds, Katherine R / Reynolds, Lyndsey A / Rhee, Dong K / Rivard, Allyson B / Ronk, Adam J / Rooney, Meghan B / Rubin, Lainey S / Salbert, Luke R / Saluja, Rasleen K / Schauder, Taylor / Schneiter, Allison R / Schulz, Robert W / Smith, Karl E / Spencer, Sarah / Swanson, Bryant R / Tache, Melissa A / Tewilliager, Ashley A / Tilot, Amanda K / VanEck, Eve / Villerot, Matthew M / Vylonis, Megan B / Watson, David T / Wurzler, Juliana A / Wysocki, Lauren M / Yalamanchili, Monica / Zaborowicz, Matthew A / Emerson, Julia A / Ortiz, Carlos / Deuschle, Frederic J / DiLorenzo, Lauren A / Goeller, Katie L / Macchi, Christopher R / Muller, Sarah E / Pasierb, Brittany D / Sable, Joseph E / Tucci, Jessica M / Tynon, Marykathryn / Dunbar, David A / Beken, Levent H / Conturso, Alaina C / Danner, Benjamin L / DeMichele, Gabriella A / Gonzales, Justin A / Hammond, Maureen S / Kelley, Colleen V / Kelly, Elisabeth A / Kulich, Danielle / Mageeney, Catherine M / McCabe, Nikie L / Newman, Alyssa M / Spaeder, Lindsay A / Tumminello, Richard A / Revie, Dennis / Benson, Jonathon M / Cristostomo, Michael C / DaSilva, Paolo A / Harker, Katherine S / Jarrell, Jenifer N / Jimenez, Luis A / Katz, Brandon M / Kennedy, William R / Kolibas, Kimberly S / LeBlanc, Mark T / Nguyen, Trung T / Nicolas, Daniel S / Patao, Melissa D / Patao, Shane M / Rupley, Bryan J / Sessions, Bridget J / Weaver, Jennifer A / Goodman, Anya L / Alvendia, Erica L / Baldassari, Shana M / Brown, Ashley S / Chase, Ian O / Chen, Maida / Chiang, Scott / Cromwell, Avery B / Custer, Ashley F / DiTommaso, Tia M / El-Adaimi, Jad / Goscinski, Nora C / Grove, Ryan A / Gutierrez, Nestor / Harnoto, Raechel S / Hedeen, Heather / Hong, Emily L / Hopkins, Barbara L / Huerta, Vilma F / Khoshabian, Colin / LaForge, Kristin M / Lee, Cassidy T / Lewis, Benjamin M / Lydon, Anniken M / Maniaci, Brian J / Mitchell, Ryan D / Morlock, Elaine V / Morris, William M / Naik, Priyanka / Olson, Nicole C / Osterloh, Jeannette M / Perez, Marcos A / Presley, Jonathan D / Randazzo, Matt J / Regan, Melanie K / Rossi, Franca G / Smith, Melanie A / Soliterman, Eugenia A / Sparks, Ciani J / Tran, Danny L / Wan, Tiffany / Welker, Anne A / Wong, Jeremy N / Sreenivasan, Aparna / Youngblom, Jim / Adams, Andrew / Alldredge, Justin / Bryant, Ashley / Carranza, David / Cifelli, Alyssa / Coulson, Kevin / Debow, Calise / Delacruz, Noelle / Emerson, Charlene / Farrar, Cassandra / Foret, Don / Garibay, Edgar / Gooch, John / Heslop, Michelle / Kaur, Sukhjit / Khan, Ambreen / Kim, Van / Lamb, Travis / Lindbeck, Peter / Lucas, Gabi / Macias, Elizabeth / Martiniuc, Daniela / Mayorga, Lissett / Medina, Joseph / Membreno, Nelson / Messiah, Shady / Neufeld, Lacey / Nguyen, San Francisco / Nichols, Zachary / Odisho, George / Peterson, Daymon / Rodela, Laura / Rodriguez, Priscilla / Rodriguez, Vanessa / Ruiz, Jorge / Sherrill, Will / Silva, Valeria / Sparks, Jeri / Statton, Geeta / Townsend, Ashley / Valdez, Isabel / Waters, Mary / Westphal, Kyle / Winkler, Stacey / Zumkehr, Joannee / DeJong, Randall J / Hoogewerf, Arlene J / Ackerman, Cheri M / Armistead, Isaac O / Baatenburg, Lara / Borr, Matthew J / Brouwer, Lindsay K / Burkhart, Brandon J / Bushhouse, Kelsey T / Cesko, Lejla / Choi, Tiffany Y Y / Cohen, Heather / Damsteegt, Amanda M / Darusz, Jess M / Dauphin, Cory M / Davis, Yelena P / Diekema, Emily J / Drewry, Melissa / Eisen, Michelle E M / Faber, Hayley M / Faber, Katherine J / Feenstra, Elizabeth / Felzer-Kim, Isabella T / Hammond, Brandy L / Hendriksma, Jesse / Herrold, Milton R / Hilbrands, Julia A / Howell, Emily J / Jelgerhuis, Sarah A / Jelsema, Timothy R / Johnson, Benjamin K / Jones, Kelly K / Kim, Anna / Kooienga, Ross D / Menyes, Erika E / Nollet, Eric A / Plescher, Brittany E / Rios, Lindsay / Rose, Jenny L / Schepers, Allison J / Scott, Geoff / Smith, Joshua R / Sterling, Allison M / Tenney, Jenna C / Uitvlugt, Chris / VanDyken, Rachel E / VanderVennen, Marielle / Vue, Samantha / Kokan, Nighat P / Agbley, Kwabea / Boham, Sampson K / Broomfield, Daniel / Chapman, Kayla / Dobbe, Ali / Dobbe, Ian / Harrington, William / Ibrahem, Marwan / Kennedy, Andre / Koplinsky, Chad A / Kubricky, Cassandra / Ladzekpo, Danielle / Pattison, Claire / Ramirez, Roman E / Wande, Lucia / Woehlke, Sarah / Wawersik, Matthew / Kiernan, Elizabeth / Thompson, Jeffrey S / Banker, Roxanne / Bartling, Justina R / Bhatiya, Chinmoy I / Boudoures, Anna L / Christiansen, Lena / Fosselman, Daniel S / French, Kristin M / Gill, Ishwar S / Havill, Jessen T / Johnson, Jaelyn L / Keny, Lauren J / Kerber, John M / Klett, Bethany M / Kufel, Christina N / May, Francis J / Mecoli, Jonathan P / Merry, Callie R / Meyer, Lauren R / Miller, Emily G / Mullen, Gregory J / Palozola, Katherine C / Pfeil, Jacob J / Thomas, Jessica G / Verbofsky, Evan M / Spana, Eric P / Agarwalla, Anant / Chapman, Julia / Chlebina, Ben / Chong, Insun / Falk, I N / Fitzgibbons, John D / Friedman, Harrison / Ighile, Osagie / Kim, Andrew J / Knouse, Kristin A / Kung, Faith / Mammo, Danny / Ng, Chun Leung / Nikam, Vinayak S / Norton, Diana / Pham, Philip / Polk, Jessica W / Prasad, Shreya / Rankin, Helen / Ratliff, Camille D / Scala, Victoria / Schwartz, Nicholas U / Shuen, Jessica A / Xu, Amy / Xu, Thomas Q / Zhang, Yi / Rosenwald, Anne G / Burg, Martin G / Adams, Stephanie J / Baker, Morgan / Botsford, Bobbi / Brinkley, Briana / Brown, Carter / Emiah, Shadie / Enoch, Erica / Gier, Chad / Greenwell, Alyson / Hoogenboom, Lindsay / Matthews, Jordan E / McDonald, Mitchell / Mercer, Amanda / Monsma, Nicholaus / Ostby, Kristine / Ramic, Alen / Shallman, Devon / Simon, Matthew / Spencer, Eric / Tomkins, Trisha / Wendland, Pete / Wylie, Anna / Wolyniak, Michael J / Robertson, Gregory M / Smith, Samuel I / DiAngelo, Justin R / Sassu, Eric D / Bhalla, Satish C / Sharif, Karim A / Choeying, Tenzin / Macias, Jason S / Sanusi, Fareed / Torchon, Karvyn / Bednarski, April E / Alvarez, Consuelo J / Davis, Kristen C / Dunham, Carrie A / Grantham, Alaina J / Hare, Amber N / Schottler, Jennifer / Scott, Zackary W / Kuleck, Gary A / Yu, Nicole S / Kaehler, Marian M / Jipp, Jacob / Overvoorde, Paul J / Shoop, Elizabeth / Cyrankowski, Olivia / Hoover, Betsy / Kusner, Matt / Lin, Devry / Martinov, Tijana / Misch, Jonathan / Salzman, Garrett / Schiedermayer, Holly / Snavely, Michael / Zarrasola, Stephanie / Parrish, Susan / Baker, Atlee / Beckett, Alissa / Belella, Carissa / Bryant, Julie / Conrad, Turner / Fearnow, Adam / Gomez, Carolina / Herbstsomer, Robert A / Hirsch, Sarah / Johnson, Christen / Jones, Melissa / Kabaso, Rita / Lemmon, Eric / Vieira, Carolina Marques Dos Santos / McFarland, Darryl / McLaughlin, Christopher / Morgan, Abbie / Musokotwane, Sepo / Neutzling, William / Nietmann, Jana / Paluskievicz, Christina / Penn, Jessica / Peoples, Emily / Pozmanter, Caitlin / Reed, Emily / Rigby, Nichole / Schmidt, Lasse / Shelton, Micah / Shuford, Rebecca / Tirasawasdichai, Tiara / Undem, Blair / Urick, Damian / Vondy, Kayla / Yarrington, Bryan / Eckdahl, Todd T / Poet, Jeffrey L / Allen, Alica B / Anderson, John E / Barnett, Jason M / Baumgardner, Jordan S / Brown, Adam D / Carney, Jordan E / Chavez, Ramiro A / Christgen, Shelbi L / Christie, Jordan S / Clary, Andrea N / Conn, Michel A / Cooper, Kristen M / Crowley, Matt J / Crowley, Samuel T / Doty, Jennifer S / Dow, Brian A / Edwards, Curtis R / Elder, Darcie D / Fanning, John P / Janssen, Bridget M / Lambright, Anthony K / Lane, Curtiss E / Limle, Austin B / Mazur, Tammy / McCracken, Marly R / McDonough, Alexa M / Melton, Amy D / Minnick, Phillip J / Musick, Adam E / Newhart, William H / Noynaert, Joseph W / Ogden, Bradley J / Sandusky, Michael W / Schmuecker, Samantha M / Shipman, Anna L / Smith, Anna L / Thomsen, Kristen M / Unzicker, Matthew R / Vernon, William B / Winn, Wesley W / Woyski, Dustin S / Zhu, Xiao / Du, Chunguang / Ament, Caitlin / Aso, Soham / Bisogno, Laura Simone / Caronna, Jason / Fefelova, Nadezhda / Lopez, Lenin / Malkowitz, Lorraine / Marra, Jonathan / Menillo, Daniella / Obiorah, Ifeanyi / Onsarigo, Eric Nyabeta / Primus, Shekerah / Soos, Mahdi / Tare, Archana / Zidan, Ameer / Jones, Christopher J / Aronhalt, Todd / Bellush, James M / Burke, Christa / DeFazio, Steve / Does, Benjamin R / Johnson, Todd D / Keysock, Nicholas / Knudsen, Nelson H / Messler, James / Myirski, Kevin / Rekai, Jade Lea / Rempe, Ryan Michael / Salgado, Michael S / Stagaard, Erica / Starcher, Justin R / Waggoner, Andrew W / Yemelyanova, Anastasia K / Hark, Amy T / Bertolet, Anne / Kuschner, Cyrus E / Parry, Kesley / Quach, Michael / Shantzer, Lindsey / Shaw, Mary E / Smith, Mary A / Glenn, Omolara / Mason, Portia / Williams, Charlotte / Key, S Catherine Silver / Henry, Tyneshia C P / Johnson, Ashlee G / White, Jackie X / Haberman, Adam / Asinof, Sam / Drumm, Kelly / Freeburg, Trip / Safa, Nadia / Schultz, Darrin / Shevin, Yakov / Svoronos, Petros / Vuong, Tam / Wellinghoff, Jules / Hoopes, Laura L M / Chau, Kim M / Ward, Alyssa / Regisford, E Gloria C / Augustine, LaJerald / Davis-Reyes, Brionna / Echendu, Vivienne / Hales, Jasmine / Ibarra, Sharon / Johnson, Lauriaun / Ovu, Steven / Braverman, John M / Bahr, Thomas J / Caesar, Nicole M / Campana, Christopher / Cassidy, Daniel W / Cognetti, Peter A / English, Johnathan D / Fadus, Matthew C / Fick, Cameron N / Freda, Philip J / Hennessy, Bryan M / Hockenberger, Kelsey / Jones, Jennifer K / King, Jessica E / Knob, Christopher R / Kraftmann, Karen J / Li, Linghui / Lupey, Lena N / Minniti, Carl J / Minton, Thomas F / Moran, Joseph V / Mudumbi, Krishna / Nordman, Elizabeth C / Puetz, William J / Robinson, Lauren M / Rose, Thomas J / Sweeney, Edward P / Timko, Ashley S / Paetkau, Don W / Eisler, Heather L / Aldrup, Megan E / Bodenberg, Jessica M / Cole, Mara G / Deranek, Kelly M / DeShetler, Megan / Dowd, Rose M / Eckardt, Alexandra K / Ehret, Sharon C / Fese, Jessica / Garrett, Amanda D / Kammrath, Anna / Kappes, Michelle L / Light, Morgan R / Meier, Anne C / O'Rouke, Allison / Perella, Mallory / Ramsey, Kimberley / Ramthun, Jennifer R / Reilly, Mary T / Robinett, Deirdre / Rossi, Nadine L / Schueler, Mary Grace / Shoemaker, Emma / Starkey, Kristin M / Vetor, Ashley / Vrable, Abby / Chandrasekaran, Vidya / Beck, Christopher / Hatfield, Kristen R / Herrick, Douglas A / Khoury, Christopher B / Lea, Charlotte / Louie, Christopher A / Lowell, Shannon M / Reynolds, Thomas J / Schibler, Jeanine / Scoma, Alexandra H / Smith-Gee, Maxwell T / Tuberty, Sarah / Smith, Christopher D / Lopilato, Jane E / Hauke, Jeanette / Roecklein-Canfield, Jennifer A / Corrielus, Maureen / Gilman, Hannah / Intriago, Stephanie / Maffa, Amanda / Rauf, Sabya A / Thistle, Katrina / Trieu, Melissa / Winters, Jenifer / Yang, Bib / Hauser, Charles R / Abusheikh, Tariq / Ashrawi, Yara / Benitez, Pedro / Boudreaux, Lauren R / Bourland, Megan / Chavez, Miranda / Cruz, Samantha / Elliott, GiNell / Farek, Jesse R / Flohr, Sarah / Flores, Amanda H / Friedrichs, Chelsey / Fusco, Zach / Goodwin, Zane / Helmreich, Eric / Kiley, John / Knepper, John Mark / Langner, Christine / Martinez, Megan / Mendoza, Carlos / Naik, Monal / Ochoa, Andrea / Ragland, Nicolas / Raimey, England / Rathore, Sunil / Reza, Evangelina / Sadovsky, Griffin / Seydoux, Marie-Isabelle B / Smith, Jonathan E / Unruh, Anna K / Velasquez, Vicente / Wolski, Matthew W / Gosser, Yuying / Govind, Shubha / Clarke-Medley, Nicole / Guadron, Leslie / Lau, Dawn / Lu, Alvin / Mazzeo, Cheryl / Meghdari, Mariam / Ng, Simon / Pamnani, Brad / Plante, Olivia / Shum, Yuki Kwan Wa / Song, Roy / Johnson, Diana E / Abdelnabi, Mai / Archambault, Alexi / Chamma, Norma / Gaur, Shailly / Hammett, Deborah / Kandahari, Adrese / Khayrullina, Guzal / Kumar, Sonali / Lawrence, Samantha / Madden, Nigel / Mandelbaum, Max / Milnthorp, Heather / Mohini, Shiv / Patel, Roshni / Peacock, Sarah J / Perling, Emily / Quintana, Amber / Rahimi, Michael / Ramirez, Kristen / Singhal, Rishi / Weeks, Corinne / Wong, Tiffany / Gillis, Aubree T / Moore, Zachary D / Savell, Christopher D / Watson, Reece / Mel, Stephanie F / Anilkumar, Arjun A / Bilinski, Paul / Castillo, Rostislav / Closser, Michael / Cruz, Nathalia M / Dai, Tiffany / Garbagnati, Giancarlo F / Horton, Lanor S / Kim, Dongyeon / Lau, Joyce H / Liu, James Z / Mach, Sandy D / Phan, Thu A / Ren, Yi / Stapleton, Kenneth E / Strelitz, Jean M / Sunjed, Ray / Stamm, Joyce / Anderson, Morgan C / Bonifield, Bethany Grace / Coomes, Daniel / Dillman, Adam / Durchholz, Elaine J / Fafara-Thompson, Antoinette E / Gross, Meleah J / Gygi, Amber M / Jackson, Lesley E / Johnson, Amy / Kocsisova, Zuzana / Manghelli, Joshua L / McNeil, Kylie / Murillo, Michael / Naylor, Kierstin L / Neely, Jessica / Ogawa, Emmy E / Rich, Ashley / Rogers, Anna / Spencer, J Devin / Stemler, Kristina M / Throm, Allison A / Van Camp, Matt / Weihbrecht, Katie / Wiles, T Aaron / Williams, Mallory A / Williams, Matthew / Zoll, Kyle / Bailey, Cheryl / Zhou, Leming / Balthaser, Darla M / Bashiri, Azita / Bower, Mindy E / Florian, Kayla A / Ghavam, Nazanin / Greiner-Sosanko, Elizabeth S / Karim, Helmet / Mullen, Victor W / Pelchen, Carly E / Yenerall, Paul M / Zhang, Jiayu / Rubin, Michael R / Arias-Mejias, Suzette M / Bermudez-Capo, Armando G / Bernal-Vega, Gabriela V / Colon-Vazquez, Mariela / Flores-Vazquez, Arelys / Gines-Rosario, Mariela / Llavona-Cartagena, Ivan G / Martinez-Rodriguez, Javier O / Ortiz-Fuentes, Lionel / Perez-Colomba, Eliezer O / Perez-Otero, Joseph / Rivera, Elisandra / Rodriguez-Giron, Luke J / Santiago-Sanabria, Arnaldo J / Senquiz-Gonzalez, Andrea M / delValle, Frank R Soto / Vargas-Franco, Dorianmarie / Velázquez-Soto, Karla I / Zambrana-Burgos, Joan D / Martinez-Cruzado, Juan Carlos / Asencio-Zayas, Lillyann / Babilonia-Figueroa, Kevin / Beauchamp-Pérez, Francis D / Belén-Rodríguez, Juliana / Bracero-Quiñones, Luciann / Burgos-Bula, Andrea P / Collado-Méndez, Xavier A / Colón-Cruz, Luis R / Correa-Muller, Ana I / Crooke-Rosado, Jonathan L / Cruz-García, José M / Defendini-Ávila, Marianna / Delgado-Peraza, Francheska M / Feliciano-Cancela, Alex J / Gónzalez-Pérez, Valerie M / Guiblet, Wilfried / Heredia-Negrón, Aldo / Hernández-Muñiz, Jennifer / Irizarry-González, Lourdes N / Laboy-Corales, Ángel L / Llaurador-Caraballo, Gabriela A / Marín-Maldonado, Frances / Marrero-Llerena, Ulises / Martell-Martínez, Héctor A / Martínez-Traverso, Idaliz M / Medina-Ortega, Kiara N / Méndez-Castellanos, Sonya G / Menéndez-Serrano, Krizia C / Morales-Caraballo, Carol I / Ortiz-DeChoudens, Saryleine / Ortiz-Ortiz, Patricia / Pagán-Torres, Hendrick / Pérez-Afanador, Diana / Quintana-Torres, Enid M / Ramírez-Aponte, Edwin G / Riascos-Cuero, Carolina / Rivera-Llovet, Michelle S / Rivera-Pagán, Ingrid T / Rivera-Vicéns, Ramón E / Robles-Juarbe, Fabiola / Rodríguez-Bonilla, Lorraine / Rodríguez-Echevarría, Brian O / Rodríguez-García, Priscila M / Rodríguez-Laboy, Abneris E / Rodríguez-Santiago, Susana / Rojas-Vargas, Michael L / Rubio-Marrero, Eva N / Santiago-Colón, Albeliz / Santiago-Ortiz, Jorge L / Santos-Ramos, Carlos E / Serrano-González, Joseline / Tamayo-Figueroa, Alina M / Tascón-Peñaranda, Edna P / Torres-Castillo, José L / Valentín-Feliciano, Nelson A / Valentín-Feliciano, Yashira M / Vargas-Barreto, Nadyan M / Vélez-Vázquez, Miguel / Vilanova-Vélez, Luis R / Zambrana-Echevarría, Cristina / MacKinnon, Christy / Chung, Hui-Min / Kay, Chris / Pinto, Anthony / Kopp, Olga R / Burkhardt, Joshua / Harward, Chris / Allen, Robert / Bhat, Pavan / Chang, Jimmy Hsiang-Chun / Chen, York / Chesley, Christopher / Cohn, Dara / DuPuis, David / Fasano, Michael / Fazzio, Nicholas / Gavinski, Katherine / Gebreyesus, Heran / Giarla, Thomas / Gostelow, Marcus / Greenstein, Rachel / Gunasinghe, Hashini / Hanson, Casey / Hay, Amanda / He, Tao Jian / Homa, Katie / Howe, Ruth / Howenstein, Jeff / Huang, Henry / Khatri, Aaditya / Kim, Young Lu / Knowles, Olivia / Kong, Sarah / Krock, Rebecca / Kroll, Matt / Kuhn, Julia / Kwong, Matthew / Lee, Brandon / Lee, Ryan / Levine, Kevin / Li, Yedda / Liu, Bo / Liu, Lucy / Liu, Max / Lousararian, Adam / Ma, Jimmy / Mallya, Allyson / Manchee, Charlie / Marcus, Joseph / McDaniel, Stephen / Miller, Michelle L / Molleston, Jerome M / Diez, Cristina Montero / Ng, Patrick / Ngai, Natalie / Nguyen, Hien / Nylander, Andrew / Pollack, Jason / Rastogi, Suchita / Reddy, Himabindu / Regenold, Nathaniel / Sarezky, Jon / Schultz, Michael / Shim, Jien / Skorupa, Tara / Smith, Kenneth / Spencer, Sarah J / Srikanth, Priya / Stancu, Gabriel / Stein, Andrew P / Strother, Marshall / Sudmeier, Lisa / Sun, Mengyang / Sundaram, Varun / Tazudeen, Noor / Tseng, Alan / Tzeng, Albert / Venkat, Rohit / Venkataram, Sandeep / Waldman, Leah / Wang, Tracy / Yang, Hao / Yu, Jack Y / Zheng, Yin / Preuss, Mary L / Garcia, Angelica / Juergens, Matt / Morris, Robert W / Nagengast, Alexis A / Azarewicz, Julie / Carr, Thomas J / Chichearo, Nicole / Colgan, Mike / Donegan, Megan / Gardner, Bob / Kolba, Nik / Krumm, Janice L / Lytle, Stacey / MacMillian, Laurell / Miller, Mary / Montgomery, Andrew / Moretti, Alysha / Offenbacker, Brittney / Polen, Mike / Toth, John / Woytanowski, John / Kadlec, Lisa / Crawford, Justin / Spratt, Mary L / Adams, Ashley L / Barnard, Brianna K / Cheramie, Martin N / Eime, Anne M / Golden, Kathryn L / Hawkins, Allyson P / Hill, Jessica E / Kampmeier, Jessica A / Kern, Cody D / Magnuson, Emily E / Miller, Ashley R / Morrow, Cody M / Peairs, Julia C / Pickett, Gentry L / Popelka, Sarah A / Scott, Alexis J / Teepe, Emily J / TerMeer, Katie A / Watchinski, Carmen A / Watson, Lucas A / Weber, Rachel E / Woodard, Kate A / Barnard, Daron C / Appiah, Isaac / Giddens, Michelle M / McNeil, Gerard P / Adebayo, Adeola / Bagaeva, Kate / Chinwong, Justina / Dol, Chrystel / George, Eunice / Haltaufderhyde, Kirk / Haye, Joanna / Kaur, Manpreet / Semon, Max / Serjanov, Dmitri / Toorie, Anika / Wilson, Christopher / Riddle, Nicole C / Buhler, Jeremy / Mardis, Elaine R / Elgin, Sarah C R

    G3 (Bethesda, Md.)

    2015  Band 5, Heft 5, Seite(n) 719–740

    Abstract: The Muller F element (4.2 Mb, ~80 protein-coding genes) is an unusual autosome of Drosophila melanogaster; it is mostly heterochromatic with a low recombination rate. To investigate how these properties impact the evolution of repeats and genes, we ... ...

    Abstract The Muller F element (4.2 Mb, ~80 protein-coding genes) is an unusual autosome of Drosophila melanogaster; it is mostly heterochromatic with a low recombination rate. To investigate how these properties impact the evolution of repeats and genes, we manually improved the sequence and annotated the genes on the D. erecta, D. mojavensis, and D. grimshawi F elements and euchromatic domains from the Muller D element. We find that F elements have greater transposon density (25-50%) than euchromatic reference regions (3-11%). Among the F elements, D. grimshawi has the lowest transposon density (particularly DINE-1: 2% vs. 11-27%). F element genes have larger coding spans, more coding exons, larger introns, and lower codon bias. Comparison of the Effective Number of Codons with the Codon Adaptation Index shows that, in contrast to the other species, codon bias in D. grimshawi F element genes can be attributed primarily to selection instead of mutational biases, suggesting that density and types of transposons affect the degree of local heterochromatin formation. F element genes have lower estimated DNA melting temperatures than D element genes, potentially facilitating transcription through heterochromatin. Most F element genes (~90%) have remained on that element, but the F element has smaller syntenic blocks than genome averages (3.4-3.6 vs. 8.4-8.8 genes per block), indicating greater rates of inversion despite lower rates of recombination. Overall, the F element has maintained characteristics that are distinct from other autosomes in the Drosophila lineage, illuminating the constraints imposed by a heterochromatic milieu.
    Mesh-Begriff(e) Animals ; Codon ; Computational Biology ; DNA Transposable Elements ; Drosophila/genetics ; Drosophila Proteins/genetics ; Drosophila melanogaster/genetics ; Evolution, Molecular ; Exons ; Gene Rearrangement ; Genome ; Genomics ; Heterochromatin ; Introns ; Molecular Sequence Annotation ; Polytene Chromosomes ; Repetitive Sequences, Nucleic Acid ; Selection, Genetic ; Species Specificity
    Chemische Substanzen Codon ; DNA Transposable Elements ; Drosophila Proteins ; Heterochromatin
    Sprache Englisch
    Erscheinungsdatum 2015-03-04
    Erscheinungsland United States
    Dokumenttyp Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't
    ZDB-ID 2629978-1
    ISSN 2160-1836 ; 2160-1836
    ISSN (online) 2160-1836
    ISSN 2160-1836
    DOI 10.1534/g3.114.015966
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  5. Artikel: Streptococcus pyogenes Polymyxin B-Resistant Mutants Display Enhanced ExPortal Integrity

    Port, Gary C. / Vega, Luis A. / Nylander, Andrew B. / Caparon, Michael G.

    Journal of bacteriology

    Band v. 196,, Heft no. 1

    Abstract: The ExPortal protein secretion organelle in Streptococcus pyogenes is an anionic phospholipid-containing membrane microdomain enriched in Sec translocons and postsecretion protein biogenesis factors. Polymyxin B binds to and disrupts ExPortal integrity, ... ...

    Abstract The ExPortal protein secretion organelle in Streptococcus pyogenes is an anionic phospholipid-containing membrane microdomain enriched in Sec translocons and postsecretion protein biogenesis factors. Polymyxin B binds to and disrupts ExPortal integrity, resulting in defective secretion of several toxins. To gain insight into factors that influence ExPortal organization, a genetic screen was conducted to select for spontaneous polymyxin B-resistant mutants displaying enhanced ExPortal integrity. Whole-genome resequencing of 25 resistant mutants revealed from one to four mutations per mutant genome clustered primarily within a core set of 10 gene groups. Construction of mutants with individual deletions or insertions demonstrated that 7 core genes confer resistance and enhanced ExPortal integrity through loss of function, while 3 were likely due to gain of function and/or combinatorial effects. Core resistance genes include a transcriptional regulator of lipid biosynthesis, several genes involved in nutrient acquisition, and a variety of genes involved in stress responses. Two members of the latter class also function as novel regulators of the secreted SpeB cysteine protease. Analysis of the most frequently isolated mutation, a single nucleotide deletion in a track of 9 consecutive adenine residues in pstS, encoding a component of a high-affinity Pi transporter, suggests that this sequence functions as a molecular switch to facilitate stress adaptation. Together, these data suggest the existence of a membrane stress response that promotes enhanced ExPortal integrity and resistance to cationic antimicrobial peptides.
    Schlagwörter toxins ; genes ; protein secretion ; antimicrobial cationic peptides ; transcription factors ; biogenesis ; polymyxin B ; cysteine proteinases ; Streptococcus pyogenes ; adenine ; mutants ; stress response ; sequence deletion ; bacteriology ; biosynthesis
    Sprache Englisch
    Dokumenttyp Artikel
    ISSN 0021-9193
    Datenquelle AGRIS - International Information System for the Agricultural Sciences and Technology

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