Navigation Links
Predatory bacterial swarm uses rippling motion to reach prey
Date:10/29/2008

pattern as the swarm moves through the prey cells," Kirby said. "We now know that this rippling pattern is the highly organized behavior of thousands of cells working in concert to digest the prey."

Unlike the random motion M. xanthus exhibits at low levels of prey, the study shows that during predation, individual M. xanthus cells line up perpendicular to the axis of the ripple and move back and forth. This motion of individual cells, known as cell reversal produces an alternating pattern of high and low cell density like crests and troughs of waves, and the overall motion of the wave formation is directed toward prey.

The UI team also showed that the ripple wavelength is adaptable and dependent of how much prey is available. At high prey density, M. xanthus forms ripples with shorter wavelengths. As prey density decreases, the ripple wavelength gets longer. Eventually, when there is no more prey, the rippling behavior dissipates.

"The rippling appears to enhance predation by keeping more M. xanthus cells in the location of the prey cells," Kirby said.

Finally, the UI study found that the bacteria use a chemotaxis-like signaling pathway to regulate multi-cellular rippling during predation.

Individual M. xanthus cells move by shooting rope-like projections called pili from either end of the cell. These pili attach to surfaces allowing cells to pull themselves forward or backward in a "spiderman" type motion known as cell reversal. The genes that regulate this cell reversal process are chemotaxis-like genes.

The UI team mutated two genes in this pathway to study their effect on the predatory ability of the bacterium. One mutant strain rippled continuously even in the absence of prey, and individual cells exhibited a hyper-reversing action. Conversely, the second mutation produced bacteria that were not able to ripple at all.

Both mutants were unable to respond to change
'/>"/>

Contact: Jennifer Brown
jennifer-l-brown@uiowa.edu
319-335-9917
University of Iowa
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Fishing ban guards coral reefs against predatory starfish outbreaks
2. Gene against bacterial attack unravelled
3. Study reveals how viruses collectively decide the fate of a bacterial cell
4. New paper sheds light on bacterial cell wall recycling
5. Bacterial persistence in streams
6. A survivor in Greenland: A novel bacterial species is found trapped in 120,000-year-old ice
7. Bacterial slime helps cause serious disease
8. Tomato pathogen genome may offer clues about bacterial evolution
9. Biologists surprised to find parochial bacterial viruses
10. Biochemists reveal details of mysterious bacterial microcompartments
11. Tomato pathogen genome may offer clues about bacterial evolution at dawn of agriculture
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:8/4/2015)... N.Y., Aug. 4, 2015  AMRI (NASDAQ: AMRI ) today ... 30, 2015. Highlights: , Second quarter contract ... from 2014 , Adjusted contract margins of ... of $0.22, including a $0.05 decrease in EPS from royalties in ... $16 million "We are very pleased to present ...
(Date:7/31/2015)... SHENZHEN, China , 31 de julio de 2015 ... sobre Genómica (ICG-10,  www.icg-10.org ) del 22 al 25 ... . La conferencia celebra su décimo ... se ha convertido en una de las reuniones anuales ... ,ómicas, y es una de las conferencias científicas más ...
(Date:7/31/2015)... julio de 2015 La 10 th International ... medio de BGI del 22 al 25 de octubre de 2015 ... Este año, la conferencia celebra su décimo aniversario. Desde su ... una de las reuniones anuales más influyentes del mundo en ... más dinámicas, entusiastas y mejores a nivel científico. ...
Breaking Biology News(10 mins):AMRI Announces Second Quarter 2015 Results 2AMRI Announces Second Quarter 2015 Results 3AMRI Announces Second Quarter 2015 Results 4AMRI Announces Second Quarter 2015 Results 5AMRI Announces Second Quarter 2015 Results 6AMRI Announces Second Quarter 2015 Results 7AMRI Announces Second Quarter 2015 Results 8AMRI Announces Second Quarter 2015 Results 9AMRI Announces Second Quarter 2015 Results 10AMRI Announces Second Quarter 2015 Results 11AMRI Announces Second Quarter 2015 Results 12AMRI Announces Second Quarter 2015 Results 13AMRI Announces Second Quarter 2015 Results 14AMRI Announces Second Quarter 2015 Results 15AMRI Announces Second Quarter 2015 Results 16AMRI Announces Second Quarter 2015 Results 17AMRI Announces Second Quarter 2015 Results 18AMRI Announces Second Quarter 2015 Results 19AMRI Announces Second Quarter 2015 Results 20AMRI Announces Second Quarter 2015 Results 21AMRI Announces Second Quarter 2015 Results 22AMRI Announces Second Quarter 2015 Results 23AMRI Announces Second Quarter 2015 Results 24La 10ª Conferencia Internacional sobre Genómica (ICG-10) comienza en octubre 2La 10ª Conferencia Internacional sobre Genómica (ICG-10) comienza en octubre 3La 10th International Conference on Genomics (ICG-10) se llevará a cabo en octubre 2La 10th International Conference on Genomics (ICG-10) se llevará a cabo en octubre 3
... problem, there is a greater risk that you will consume ... Sahlgrenska Academy, at the University of Gothenburg, Sweden. ,It ... likely to have a drink problem in the future, and ... on this link. Carried out by researcher Anna Sderpalm Gordh, ...
... of Energy,s (DOE) Brookhaven National Laboratory and collaborators at the ... where to insert a double bond when desaturating plant fatty ... amino acid far from the enzyme,s active site solves ... control. The work, published in the Proceedings of the ...
... SuviCa Inc. of Boulder and the University of Colorado ... drug screening technology to identify novel therapies for cancer. ... CU-Boulder Associate Professor Tin Tin Su of the molecular, ... Drosophila fruit fly model to screen for compounds effective ...
Cached Biology News:Scientists solve long-standing plant biochemistry mystery 2Scientists solve long-standing plant biochemistry mystery 3Scientists solve long-standing plant biochemistry mystery 4SuviCa Inc. of Boulder to commercialize CU-Boulder cancer screening technology 2
(Date:8/31/2015)... Milpitas, Calif. (PRWEB) , ... August 31, 2015 ... ... earlier this year to bring together supply chain risk management and resiliency practitioners ... collaborate, develop and share best practices, and be recognized for their innovations and ...
(Date:8/31/2015)... , Aug. 31, 2015 Research and ... the "Argentina Biomedical Sensors Market - Growth, Trends ... The Argentina Biomedical Sensors market is estimated ... 1.17% over the period 2014-2020 The near ... the genetic formulation of each individual. These sensors can ...
(Date:8/31/2015)... -- For people with Down syndrome, news from Elixirgen, ... located in the Science + Technology Park at Johns ... yet for people with Down syndrome and other chromosome disorders ... and Edwards syndrome aneuploidies in human cell cultures, " ... plans to develop this technology into a treatment for ...
(Date:8/31/2015)... SHANGHAI , Aug. 31, 2015 /PRNewswire/ ... next-generation antibiotics, today announced positive top-line results from ... lead drug candidate MRX-I. MRX-I is an oral ... as MRSA and VRE, while offering physicians and ... than currently available oxazolidinone agents. ...
Breaking Biology Technology:Global Supply Chain Resiliency Council Announces Incorporation and Web Site Launch 2Global Supply Chain Resiliency Council Announces Incorporation and Web Site Launch 3Argentina Biomedical Sensors Market Report 2015 - Growth, Trends & Forecasts 2014-2020 2New Down syndrome therapy discovered 2MicuRX Reports Positive Top-Line Results In Phase 2 Clinical Trial For Novel Antibiotic MRX-I In Complicated Skin And Soft Tissue Infections 2
... - Engineers at Rensselaer Polytechnic Institute have developed tools to ... of stem cell research how to quickly test stem ... create a large supply of healthy, viable stem cells to ... have created methods to study millions of stems cells on ...
... to discover life on Mars were successfully launched into ... experiment to assess their survivability in the space radiation ... approach is based on technology similar to that used ... in the Life Marker Chip (LMC) experiment, which has ...
... engineers often deal with the same problems, but they ... other can be difficult, if not impossible., A new ... by the National Science Foundation (NSF), will help bridge ... to solve common problems a range of scientists face., ...
Cached Biology Technology:Putting stem cell research on the fast track 2Putting stem cell research on the fast track 3Putting stem cell research on the fast track 4Life on Mars 'pregnancy test' successfully launched 2CCMR gets $2.9M for training grad students in nanoscale science 2
... Cell Lines stably express the regulatory ... line is functionally tested for induction ... expression control vector pGene/V5-His/lacZ and by ... with mifepristone (Figure 1). These cell ...
... for 15-20 enhancements when used as directed, ... System is designed to amplify the desired signal detected ... evaluating proteins with low expression., Membrane ... blocking the membrane; 1x solution; 250 ml, ...
... Prior to siRNA library screening, ... be identified and verified for ... Silencer CellReady siRNA Transfection Optimization ... for optimizing transfection conditions in ...
... The MX80 Series of positioning slides ... motor, ballscrew, leadscrew, micrometer, and manual. ... high performance, cost-effective multi-axis systems. These ... bearings, encoder resolutions down to 10 ...
Biology Products: