Skip to main content

The active conformation of human glucokinase is not altered by allosteric activators

Buy Article:

$51.00 plus tax (Refund Policy)

Abstract:

Glucokinase (GK) catalyses the formation of glucose 6‐phosphate from glucose and ATP. A specific feature of GK amongst hexokinases is that it can cycle between active and inactive conformations as a function of glucose concentration, resulting in a unique positive kinetic cooperativity with glucose, which turns GK into a unique key sensor of glucose metabolism, notably in the pancreas. GK is a target of antidiabetic drugs aimed at the activation of GK activity, leading to insulin secretion. Here, the first structures of a GK–glucose complex without activator, of GK–glucose–AMP‐PNP and of GK–glucose–AMP‐PNP with a bound activator are reported. All these structures are extremely similar, thus demonstrating that binding of GK activators does not result in conformational changes of the active protein but in stabilization of the active form of GK.

Document Type: Research Article

DOI: http://dx.doi.org/10.1107/S0907444911036729

Publication date: November 1, 2011

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
X
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more