scholarly journals A mobilidade e a expansão territorial na cidade de São Luís, MA: um novo paradigma social na ocupação do espaço urbano

2017 ◽  
Vol 19 (40) ◽  
pp. 977-998
Author(s):  
Marcio Rodrigo da Silva Pereira ◽  
José O. Alcântara Jr
Keyword(s):  
Social Motility

Resumo O presente trabalho tem como objetivo refletir sobre transformações no campo social e urbano que influenciaram uma mudança de paradigma na ocupação da cidade de São Luís, MA. Relacionam-se fatores históricos ocorridos no espaço urbano com teorias das ciências sociais, considerando que a mobilidade interfere no crescimento da cidade e nas suas relações entre os indivíduos. Procura-se estabelecer um elo entre as infraestruturas viárias urbanas, oriundas de ações do poder público e transformações do comportamento da sociedade contemporânea, considerando a construção social motility, utilizada por Weert, Kauffmann e Kesselring (2008). Por fim, a pesquisa busca contribuir para a compreensão das transformações urbanísticas e sociais, a partir da segunda metade do século XX, na cidade de São Luís.

scholarly journals Ras GTPase-Like Protein MglA, a Controller of Bacterial Social-Motility in Myxobacteria, Has Evolved to Control Bacterial Predation by Bdellovibrio

PLoS Genetics ◽  
2014 ◽  
Vol 10 (4) ◽  
pp. e1004253 ◽  
Author(s):  
David S. Milner ◽  
Rob Till ◽  
Ian Cadby ◽  
Andrew L. Lovering ◽  
Sarah M. Basford ◽  
...  
Keyword(s):  
Ras Gtpase ◽  
Social Motility

scholarly journals FrzS Regulates Social Motility in Myxococcus xanthus by Controlling Exopolysaccharide Production

PLoS ONE ◽  
2011 ◽  
Vol 6 (8) ◽  
pp. e23920 ◽  
Author(s):  
James E. Berleman ◽  
Juan J. Vicente ◽  
Annie E. Davis ◽  
Sharon Y. Jiang ◽  
Young-Eun Seo ◽  
...  
Keyword(s):  
Myxococcus Xanthus ◽  
Exopolysaccharide Production ◽  
Social Motility

scholarly journals "With a Little Help from My Friends"—Social Motility in Trypanosoma brucei

2015 ◽  
Vol 11 (12) ◽  
pp. e1005272 ◽  
Author(s):  
Edwin A. Saada ◽  
Stephanie F. DeMarco ◽  
Michelle M. Shimogawa ◽  
Kent L. Hill
Keyword(s):  
Trypanosoma Brucei ◽  
Social Motility

scholarly journals New Locus Important for Myxococcus Social Motility and Development

2007 ◽  
Vol 189 (21) ◽  
pp. 7937-7941 ◽  
Author(s):  
Cui-ying Zhang ◽  
Ke Cai ◽  
Hong Liu ◽  
Yong Zhang ◽  
Hong-wei Pan ◽  
...  
Keyword(s):  
Fruiting Body ◽  
Myxococcus Xanthus ◽  
Gliding Motility ◽  
Salt Tolerant ◽  
Fruiting Body Formation ◽  
Body Formation ◽  
Homologous Genes ◽  
Body Development ◽  
Fruiting Body Development ◽  
Social Motility

ABSTRACT The mts locus in salt-tolerant Myxococcus fulvus HW-1 was found to be critical for gliding motility, fruiting-body formation, and sporulation. The homologous genes in Myxococcus xanthus are also important for social motility and fruiting-body development. The mts genes were determined to be involved in cell-cell cohesion in both myxobacterial species.

Geographical mobility and social motility in the Aegean before and after 6600 BC

2018 ◽  
Vol 93 (1) ◽  
pp. 1-24 ◽  
Author(s):  
Agathe Reingruber
Keyword(s):  
Geographical Mobility ◽  
Before And After ◽  
Kultureller Wandel ◽  
Social Motility

Zusammenfassung Eine der folgenreichsten Veränderungen in der Menschheitsgeschichte betrifft die Überwindung der Abhängigkeit von ausschließlich lokalen Ressourcen durch die am Beginn des Holozäns im Vorderen Orient einsetzende Domestikation von zuerst Pflanzen und dann Tieren. Jede Generation von Archäologen hat diesen Wandel im Lichte neu gewonnen Wissens aufgrund neuer Ausgrabungen und neuer analytischer Methoden reflektiert. Die Ausbreitung der produzierenden Wirtschaftsweise aus dem Kerngebiet in Nachbarregionen wurde dabei vornehmlich als kultureller Wandel gedeutet, der durch Auswanderer oder Kolonisten vollzogen worden wäre. Dementsprechend beinhalten die vorgeschlagenen Neolithisierungsmodelle lineare Bewegungen von Ost nach West, die den scheinbar abrupten Kulturwandel erklärten. Dabei wurde der Konzeptualisierung von Begriffen wie Kolonisation oder Migration, wie sie von Soziologen vorgeschlagen wurde, wenig Aufmerksamkeit geschenkt. Unter Berücksichtigung soziologischer Studien wird der Schwerpunkt dieser Untersuchung weniger auf dem schnellen kulturellen als vielmehr auf dem langsamen, generationenübergreifenden sozialen Wandel und auf der aktiven sozialen Beweglichkeit (Motilität) liegen. Die Perspektive ist folglich nicht die von Neuankömmlingen aus dem neolithischen Anatolien, sondern die der mesolithischen ägäischen Gemeinschaften. Es mag nämlich nicht die Entscheidung mobiler Bauern gewesen sein, nahe oder ferne Regionen zu „kolonisieren“, sondern die der Jäger und Sammler, Innovationen aus den Ursprungsgebieten (selektiv) zu übernehmen und ihren eigenen Bedürfnissen anzupassen. Als aktive Entscheidungsträger setzten sie einen Prozess in Gange, der nicht nur zu ökonomischen, sondern auch, über mehrere Generationen hinweg, zu sozialen und kulturellen Veränderungen führte.

scholarly journals SigF, a New Sigma Factor Required for a Motility System of Myxococcus xanthus

2005 ◽  
Vol 187 (24) ◽  
pp. 8537-8541 ◽  
Author(s):  
Toshiyuki Ueki ◽  
Chun-Ying Xu ◽  
Sumiko Inouye
Keyword(s):  
Gene Expression ◽  
Fruiting Body ◽  
Sigma Factor ◽  
Vegetative Growth ◽  
Growth Analysis ◽  
Myxococcus Xanthus ◽  
Fruiting Body Formation ◽  
Body Formation ◽  
The Social ◽  
Social Motility

ABSTRACT A new sigma factor, SigF, was identified from the social and developmental bacterium Myxococcus xanthus. SigF is required for fruiting body formation during development as well as social motility during vegetative growth. Analysis of gene expression indicates that it is possible that the sigF gene is involved in regulation of an unidentified gene for social motility.

scholarly journals Social motility in African trypanosomes: fact or model?

2015 ◽  
Vol 31 (2) ◽  
pp. 37-38 ◽  
Author(s):  
Philippe Bastin ◽  
Brice Rotureau
Keyword(s):  
African Trypanosomes ◽  
Social Motility

scholarly journals Discovery of the Autonomously Replicating Plasmid pMF1 from Myxococcus fulvus and Development of a Gene Cloning System in Myxococcus xanthus

2008 ◽  
Vol 74 (7) ◽  
pp. 1980-1987 ◽  
Author(s):  
Jing-yi Zhao ◽  
Li Zhong ◽  
Mei-juan Shen ◽  
Zhi-jie Xia ◽  
Qiu-xiang Cheng ◽  
...  
Keyword(s):  
Genetic Manipulation ◽  
Myxococcus Xanthus ◽  
Open Reading Frames ◽  
High Frequencies ◽  
Shuttle Vectors ◽  
Indigenous Plasmids ◽  
Unknown Protein ◽  
Bioactive Secondary Metabolites ◽  
Social Motility ◽  
Reading Frames

ABSTRACT Myxobacteria are very important due to their unique characteristics, such as multicellular social behavior and the production of diverse and novel bioactive secondary metabolites. However, the lack of autonomously replicating plasmids has hindered genetic manipulation of myxobacteria for decades. To determine whether indigenous plasmids are present, we screened about 150 myxobacterial strains, and a circular plasmid designated pMF1 was isolated from Myxococcus fulvus 124B02. Sequence analysis showed that this plasmid was 18,634 bp long and had a G+C content of 68.7%. Twenty-three open reading frames were found in the plasmid, and 14 of them were not homologous to any known sequence. Plasmids containing the gene designated pMF1.14, which encodes a large unknown protein, were shown to transform Myxococcus xanthus DZ1 and DK1622 at high frequencies (∼105 CFU/μg DNA), suggesting that the locus is responsible for the autonomous replication of pMF1. Shuttle vectors were constructed for both M. xanthus and Escherichia coli. The pilA gene, which is essential for pilus formation and social motility in M. xanthus, was cloned into the shuttle vectors and introduced into the pilA-deficient mutant DK10410. The transformants subsequently exhibited the ability to form pili and social motility. Autonomously replicating plasmid pMF1 provides a new tool for genetic manipulation in Myxococcus.

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