Navigation Links
New studies reveal downstream processes of ion channel inactivation
Date:3/2/2010

Two studies by researchers at The Johns Hopkins University School of Medicine reveal new details of the mechanisms of ion channel inactivation. The papers appear in the March issue of The Journal of General Physiology (www.jgp.org).

After opening, many ion channels spontaneously close by inactivation, a process distinct from that involved in opening. The inactivation of channels is important for a variety of biological processes, including the timing of action potentials and the control of calcium permeability, which affects many aspects of intracellular signaling. Although the events of Ca2+-dependent inactivation (CDI) and voltage-dependent inactivation (VDI) have been unveiled in the past decade, the downstream mechanisms remained unclear.

Tadross et al. studied both CDI and VDI in Cav1.3 channels and showed them to differ not only in their initiation mechanisms but also in their distinct molecular endpoints. For CDI, a clear pattern emerges: activation-enhancing mutations proportionately weaken inactivation, supporting the idea that CDI reduces channel permeability by allosteric hindrance of the activation gate. For VDI, the data implicate a "hinged lidshield" mechanism, similar to a hinged-lid process, with a previously unrecognized feature, a "shield" in Cav1.3 channels that is specialized to repel lid closure.

In a Commentary accompanying the papers, Jianmin Cui (Washington University, St. Louis) examines the mechanisms of inactivation and provides context for the importance of the new findings by Tadross et al.


'/>"/>

Contact: Rita Sullivan
news@rupress.org
212-327-8603
Rockefeller University Press
Source:Eurekalert

Page: 1

Related biology news :

1. Claims of sex-related differences in genetic association studies often not properly validated
2. Genes, Environment and Health Initiative invests in genetic studies, environmental monitoring
3. NIH awards researcher $1.5 million new innovator grant for fruit-fly studies of prion proteins
4. Studies: Children obese due to a host of unhealthy pressures
5. Clinical studies show REMICADE reduces incidence of bowel surgeries in ulcerative colitis patients
6. LSU professor studies army-ant-following birds
7. 2 carotid artery stenting studies show results comparable to AHA guidelines
8. NIH grants enable energy studies
9. New studies on schizophrenia, depression, trauma and autism highlight annual meeting
10. Experts from Stevens, Merck, publish joint paper, Biosynthetic Studies of Platensimycin
11. New studies suggest brain overgrowth in 1-year-olds linked to development of autism
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/13/2017)... 13, 2017 UBM,s Advanced Design and Manufacturing ... feature emerging and evolving technology through its 3D Printing ... run alongside the expo portion of the event and ... demonstrations focused on trending topics within 3D printing and ... manufacturing event will take place June 13-15, 2017 at the ...
(Date:4/11/2017)... , April 11, 2017 No two ... researchers at the New York University Tandon School ... Engineering have found that partial similarities between prints ... used in mobile phones and other electronic devices ... The vulnerability lies in the fact that ...
(Date:4/5/2017)... , April 5, 2017 Today HYPR ... that the server component of the HYPR platform is ... providing the end-to-end security architecture that empowers biometric authentication ... HYPR has already secured over 15 million users across ... manufacturers of connected home product suites and physical access ...
Breaking Biology News(10 mins):
(Date:8/14/2017)... ... ... The Conference Forum has confirmed the one-day agenda for the ... 2017 at the Marriott Copley Place in Boston, MA. , Returning as program chair ... Pfizer Innovative Research Lab, Pfizer, who leads 19 industry speakers in discussing how and ...
(Date:8/11/2017)... ... 11, 2017 , ... A staple in the community for more than 60 ... key elements including a new digital marketing strategy and updated logo. , As part ... has partnered with the South Texas Blood & Tissue Center for the month of ...
(Date:8/11/2017)... ... 2017 , ... “There is an increasing consumer call for ... ingredients,” said Matt Hundt, President of Third Wave Bioactives. “Combining the strong discovery ... of Biorigin will allow us to bring truly novel fermented ingredient technologies to ...
(Date:8/10/2017)... ... August 09, 2017 , ... Teachers ... as students. From August 14th through the 16th, the University City Science Center ... the summer of 2016, provides Philadelphia-based middle school educators an opportunity for professional ...
Breaking Biology Technology: