Navigation Links
Samurai sword protein makes strategic cuts in cell skeletons
Date:10/24/2013

through simulation that these branches would disorder the array unless some kind of pruning or culling mechanism was also in play.

Meanwhile, scientists at the University of Manchester in England had observed that misaligned microtubules were severed at junctions where a growing microtubule crosses an existing microtubule.

Zhang in the Dixit lab began with these observations and devised experiments to clarify the molecular mechanisms underlying them. He showed that they are insensitive to the geometry of the crossover or the stoutness of the underlying microtubule bundle. Instead, all that mattered was time.

How rapidly crossovers were cut determined what sort of array formed. In the transverse arrays, microtubules were cut, on average, within 41 seconds of a crossover event. In net-like arrays, on the other hand, cutting was three times slower and not as tightly controlled.

Plants have several severing proteins that might cut microtubules, but of these, katanin was the likeliest suspect. And in the katanin mutant, none of the crossovers were severed, demonstrating that this enzyme is solely responsible for cytoskeleton patterning.

To make sure, the scientists tagged katanin green and the microtubules red. When the cell was color coded in this way, they were able to see that katanin almost always localized to crossover sites before they were severed.

Coming in from the cold

These experiments showed that katanin was responsible for maintaining array patterning, but does it also create the pattern in the first place? To find out, Zhang used a trick he found in the literature, Dixit says.

Microtubules are cold sensitive and fall apart when they are chilled. "So Quan would put cells in the freezer for four or five minutes, take a slide out, run to the microscope, and watch to see what happened as the cells warmed up," Dixit says.

In the wild-type cells, the microtubules quickly re-ap
'/>"/>

Contact: Diana Lutz
dlutz@wustl.edu
314-935-5272
Washington University in St. Louis
Source:Eurekalert  

Page: 1 2 3 4 5

Related biology news :

1. Global warming may have severe consequences for rare Haleakalā silverswords
2. Global warming may have severe consequences for rare Haleakalā silverswords
3. Iris Biometrics Leader EyeLock Joins the FIDO Alliance to Help Identify More Secure Replacement for Usernames and Passwords
4. IU biologists offer clearer picture of how protein machine systems tweak gene expression
5. Making memories: How 1 protein does it
6. Embryonic development protein active in cancer growth
7. More effective method of imaging proteins
8. The loss of a protein makes jump the tumor to the lymph node
9. Gold nanoantennas detect proteins
10. The Japanese traditional therapy, honokiol, blocks key protein in inflammatory brain damage
11. New hope for treating Alzheimers Disease: A role for the FKBP52 protein
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Samurai sword protein makes strategic cuts in cell skeletons
(Date:7/11/2014)... at the Department of Energy,s Oak Ridge National ... by R&D Magazine in recognition of the year,s ... the tremendous value of our National Labs," said ... at the National Labs continues to help our ... scientific and technological innovations necessary to remain globally ...
(Date:7/11/2014)... Bone and Mineral Research awarded Michael F. Holick, PhD, ... the 2014 Louis V. Avioli Award. Holick, a professor ... known for revolutionizing the understanding of vitamin D and ... honors a member of the American Society for Bone ... and mineral basic research. It is named for ASBMR,s ...
(Date:7/11/2014)... Cell scientists have set a "mouse TRAP" to capture ... a recent study published in the Journal of ... a technique called TRAP to extract cellular and genetic ... by scientists at the Rockefeller Institute for Medical Research ... the protein-making machinery, or ribosomes, of the cell type ...
Breaking Biology News(10 mins):ORNL wins eight R&D 100s 2ORNL wins eight R&D 100s 3ORNL wins eight R&D 100s 4BUSM's Michael F. Holick receives American Society for Bone and Mineral Research award 2
... Scientists propose developing an environmentally-friendly fungal spray that would ... a critical growth stage. This spray will contain ... and will have no side-effects on non-target organisms and ... therefore provide a quick, safe and effective means for ...
... the Technion Israel Institute of Technology, the ... have recently identified genes responsible for the positive ... drug Copaxone®. These findings may contribute to the ... Copaxone® was the first original Israeli drug ...
... -- A new book by researchers at the ... the mouse demonstrates a surprising similarity between mice and humans. ... by a team from the Hebrew University Bone Laboratory consisting ... Hajbi-Yonissi and Dr. Yankel Gabet. Also participating in the writing ...
Cached Biology News:New hope for horse lovers as effective control for killer ragwort is proposed 2Israeli scientists identify: Genes that affect responses of multiple sclerosis patients to copaxone 2Of mice and men: similarities between skeletons of both 2
(Date:7/10/2014)... 10, 2014 OMICS Group’s 5th International ... 18-20 August, 2014 at Double Tree by Hilton Beijing, ... developments in Analytical & Bioanalytical research methods only to ... on this occasion, Dr. Srinubabu Gedela, MD of OMICS ... is a remarkable one in bringing a unique and ...
(Date:7/10/2014)... ST. PETERSBURG, Russia , July 10, 2014 /PRNewswire/ ... the Russian Federation Dmitry Medvedev , presented ... a biopharmaceutical company BIOCAD . The Company is ... the scope of MabNext project BIOCAD develops a number ... of cancer and autoimmune diseases. The ceremony took place ...
(Date:7/10/2014)... OAKS, Calif., July 10, 2014   Ceres, Inc ... and seed company, announced today financial results for the ... update on its business. Ceres reported that ... in product performance this growing season in Brazil, which ... affected the company,s sorghum evaluation areas for part of ...
(Date:7/10/2014)... journal PNAS (Proceedings of the National Academy of ... sleep deprivation have a significant effect on our metabolism. ... best time of day to test for diseases such ... effectively. , Researchers from the University of Surrey and ... between sleep deprivation, body clock disruption and metabolism, and ...
Breaking Biology Technology:A Critical Review of Analytical Techniques for Improved Living Standards 2A Critical Review of Analytical Techniques for Improved Living Standards 3A Critical Review of Analytical Techniques for Improved Living Standards 4Dmitry Medvedev Presented BIOCAD the First National "Industry" Award 2Ceres Announces Fiscal Third Quarter 2014 Financial Results 2Ceres Announces Fiscal Third Quarter 2014 Financial Results 3Ceres Announces Fiscal Third Quarter 2014 Financial Results 4Ceres Announces Fiscal Third Quarter 2014 Financial Results 5Ceres Announces Fiscal Third Quarter 2014 Financial Results 6Ceres Announces Fiscal Third Quarter 2014 Financial Results 7Ceres Announces Fiscal Third Quarter 2014 Financial Results 8Ceres Announces Fiscal Third Quarter 2014 Financial Results 9Time of day crucial to accurately test for diseases, new research finds 2
... 19 /PRNewswire-FirstCall/ - ARIUS Research Inc., (TSX:,ARI), a ... of,antibody therapeutics, today announced that David Young, MD, ... at the Chinese Global,Financial Forum. Dr. Young will ... will be available prior to and following his ...
... ... WEST HAVEN, Conn., Oct. 19 Dr. Heather Coyle ... Haven have,developed a new method for preparing certain skeletal remains ... the,research the group is doing for the Smithsonian Institution. Obtaining ...
... Therapeutics Inc., a,Nutritional Therapeutics Innovation Company, today announced ... Wakeman as President. "Pilot has always had ... and dietary supplement areas with over 60 issued ... potential to rapidly move our,world class technologies and ...
Cached Biology Technology:ARIUS to present at Chinese Global Financial Forum 2800-Year-Old Mummies Aid Current Cold Cases: 2Pilot Therapeutics Announces New Executive Team with Extensive Experience Creating New Health and Nutrition Businesses 2
Special grade: for molecular biology Density: 1.000 g/mL (20 C)...
... cleaning agent for removing RNase ... and pipettors. It is ... contamination from microcentrifuge tubes without ... Zap (R) is ...
Matrix for protein MALDI-MS...
... number is a new ... easily match Cornings product ... availability yet, please order ... number (Z36,327-8) or contact ...
Biology Products: