Navigation Links
Symbiotic bacteria program daily rhythms in squid using light and chemicals
Date:4/1/2013

Glowing bacteria inside squids use light and chemical signals to control circadian-like rhythms in the animals, according to a study to be published on April 2 in mBio, the online open-access journal of the American Society for Microbiology. The Hawaiian bobtail squid, Euprymna scolopes, houses a colony of Vibrio fischeri bacteria in its light organ, using the bacteria at night as an antipredatory camouflage while it ventures out to hunt. The results of the study show that, in addition to acting as a built-in lamp, the bacteria also control when the squid expresses a gene that entrains, or synchronizes, circadian rhythms in animals.

"To our knowledge, this is the first report of bacteria entraining the daily rhythms of host tissues," says corresponding author Margaret McFall-Ngai of the University of Wisconsin - Madison. If bacteria can entrain daily rhythms in an animal, McFall-Ngai says, it's reasonable to think these influences will eventually be found in other animals. It's possible that microbial partners in the human gut, for instance, could similarly influence human daily rhythms through chemical signaling.

Like all animals, squids make proteins that set their inner clock to environmental light. E. scolopes produces two of these "light entrainment" proteins (cryptochromes, or CRYs), and one is regulated in the squid's head, just like every other animal. McFall-Ngai and her co-authors noticed that escry1, the gene that encodes the other protein, is most highly expressed in the light organ, where the squid houses its glowing bacterial symbionts. "The animal uses the luminescence in the evening, so the luminescence is greatest at night. The gene escry1 cycles with the bioluminescence of the animal and not with environmental light," says McFall-Ngai.

But is it the bacterial luminescence that synchronizes the cycling, or is it the bacteria themselves? It's both, says McFall-Ngai.

The bacteria
'/>"/>

Contact: Jim Sliwa
jsliwa@asmusa.org
202-942-9297
American Society for Microbiology
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Genetically modified corn affects its symbiotic relationship with non-target soil organisms
2. Unique adaptations to a symbiotic lifestyle reveal novel targets for aphid insecticides
3. Carnivorous plants rely on the services and wastes of a symbiotic ant for nutrition
4. Bugs need symbiotic bacteria to exploit plant seeds
5. Leading evolutionary scientist to discuss how genome of bacteria has evolved
6. Study by UC Santa Barbara researchers suggests that bacteria communicate by touch
7. Team discovers how bacteria resist a Trojan horse antibiotic
8. From scourge to saint: E. coli bacteria becomes a factory - to make cheaper, faster pharmaceuticals
9. Bacterial shock to recapture essential phosphate
10. Disarming disease-causing bacteria
11. Study shows unified process of evolution in bacteria and sexual eukaryotes
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/30/2014)... a massive collection of 20-million-year-old amber found in the ... effort is yielding fresh insights into ancient tropical insects ... is fully curated, a task that will take many ... collection in the world, the researchers report. , ... of a pygmy locust, a tiny grasshopper the size ...
(Date:7/30/2014)... of Engineering recently received a $330,000 award from ... synthesis of organic nanorods." , According to ... and utilization of functional materials, devices, and systems ... in scaling up nanotechnology is the lack of ... one device. A research team led by Dr. ...
(Date:7/30/2014)... Wallerian degeneration is a subject of major interest ... differentially regulated during the distinct stages of Wallerian ... differentiation and dedifferentiation. Although gene expression responses in ... peripheral nerve injury are known, differences in gene ... unclear. Dr. Dengbing Yao and co-workers from Nantong ...
Breaking Biology News(10 mins):Decades-old amber collection offers new views of a lost world 2NSF grant to Wayne State supports new concept for manufacturing nanoscale devices 2
... ON (September 05, 2011) You may think your lack ... because you,re lazy, but McMaster University researchers have discovered it ... made their unexpected finding while working with healthy, specially-bred mice, ... exercise removed. The genes control the protein AMP-activated protein kinase ...
... It is now widely accepted that the species Homo ... world. But did those early humans interbreed with more ... erectus, the "upright walking man," Homo habilis, the ... cave-painting fame? Direct studies of ancient DNA from ...
... Ten variants of the deadly Escherichia coli ... sequenced across the world. The unprecedented level of collaboration ... the outbreak arose, says a scientist at the Society ... the bacterium started in early June at BGI, China. ...
Cached Biology News:McMaster researchers find missing genes may separate coach potato from active cousin 2Ancient humans were mixing it up 2Ancient humans were mixing it up 3Ancient humans were mixing it up 4Crowd-sourcing the E. coli O104:H4 outbreak 2
(Date:7/31/2014)... SoundConnect , an award winning ... to announce the addition of Adobe Connects Learning ... tools to quickly deploy and manage online courses ... for desktop and mobile learning solutions. , Adobe ... online training solution, enabling organizations to deploy, measure, ...
(Date:7/30/2014)... 30, 2014 Regulus Therapeutics Inc . ... the discovery and development of innovative medicines targeting microRNAs, ... highlights for the quarter ended June 30, 2014 on ... close. Regulus will host a conference ... 5:00 pm Eastern Daylight Time to discuss its second ...
(Date:7/30/2014)... 30, 2014 A study presented at ... and efficacy of CSL Behring,s C1 Inhibitor (C1-INH) ... in highly sensitized patients. C1-INH is a human ... system. The study shows that post-transplant ... the levels of complement components 3 and 4, ...
(Date:7/30/2014)... Selexis SA , a serial ... and mammalian cell line development, announced today new data ... be presented at the 10th Annual Cell Line ... – 10, 2014 at the Double Tree by Hilton ... abstract will be presented during an oral presentation: , ...
Breaking Biology Technology:SoundConnect Enhances Portfolio with Adobe Connect Learning Management System (LMS) 2Regulus Announces Timing for Second Quarter 2014 Financial Results Webcast and Conference Call 2Regulus Announces Timing for Second Quarter 2014 Financial Results Webcast and Conference Call 3Study Suggests C1-INH May Aid in Prevention of Antibody-Mediated Rejection Following Kidney Transplant 2Study Suggests C1-INH May Aid in Prevention of Antibody-Mediated Rejection Following Kidney Transplant 3Selexis SA to Present New Data and a Case Study at IBC’s Cell Line Development and Engineering Conference 2Selexis SA to Present New Data and a Case Study at IBC’s Cell Line Development and Engineering Conference 3
... Medco Health,Solutions, Inc. (NYSE: MHS ) Chairman ... members of his senior management team, will present an,overview ... and institutional investors during its annual Analyst Day,conference on ... of Pharmacy," is scheduled to begin at 8 a.m. ...
... Abercrombie, Pfizer R&D Head Martin,Mackay, HHS Deputy Secretary Tevi ... Agenda at FDA/CMS Summit 2007, WASHINGTON, Nov. 15 ... drug approvals. Unfortunately for the biopharma sector and,investors, it,s ... on track,to grant marketing approval to 18 or fewer ...
... Brad Thompson, President,and CEO of Oncolytics Biotech Inc. ... of the company at Toronto CFA Society on ... at the National Club, 303 Bay,Street, Toronto at ... Oncolytics is a Calgary-based biotechnology company focused on ...
Cached Biology Technology:Medco to Webcast Annual Analyst Day Conference 2So Long, Old Friend: The End of the Blockbuster Drug Era? What 2008 Holds for Bringing Drugs to Market 2So Long, Old Friend: The End of the Blockbuster Drug Era? What 2008 Holds for Bringing Drugs to Market 3Media Advisory - Oncolytics Biotech Inc. to Present at Toronto CFA Society 2
Phosphotyrosine IgG mouse monoclonal antibody: Alkaline Phosphatase conjugate...
Rabbit polyclonal to GPCR G2A ( Abpromise for all tested applications). entrezGeneID: 29933 SwissProtID: Q9UNW8...
... This reagent has been developed ... for the reduction of nonspecific background ... Traditional methods describe blocking peroxidase with ... hydrogen peroxide in combination with additional ...
Rabbit polyclonal to Wilms Tumor Protein ( Abpromise for all tested applications). entrezGeneID: 7490 SwissProtID: P19544...
Biology Products: