New Media Medicine - View Single Post - Why is GTP used in cell signalling rather than ATP?

robertfw · 28-03-2008, 12:35 AM

G proteins such as Ras use GTP in cell signalling. Is there a reason why they don't use ATP instead? Can anyone throw any light on this? Thanks very much indeed for taking the time to respond.

28-03-2008, 12:35 AM	#1 (permalink)
robertfw Junior Member Join Date: Mar 2008 Posts: 4	Why is GTP used in cell signalling rather than ATP? G proteins such as Ras use GTP in cell signalling. Is there a reason why they don't use ATP instead? Can anyone throw any light on this? Thanks very much indeed for taking the time to respond.